| 1 |
arc seam weld |
a seam weld made by an arc welding process |
| 2 |
arc spot weld |
a spot weld made by an arc welding process |
| 3 |
arc strike |
any inadvertent discontinuity resulting from an arc, consisting of
any localized re-melted metal, heat-affected metal, or change in the surface profile of any metal object. The arc may be caused
by arc welding electrodes, magnetic inspection prods, or frayed electrical cable. |
| 4 |
arc welding |
a group of welding processes wherein coalescence is produced by heating
with an arc or arcs, with or without the application of pressure, and with or without the use of filler metal |
| 5 |
as brazed |
adj. pertaining to the condition of brazements after brazing, prior
to any subsequent thermal, mechanical, or chemical treatments |
| 6 |
as welded |
adj. pertaining to the condition of weld metal, welded joints, and
weldments after welding but prior to any subsequent thermal, mechanical, or chemical treatments |
| 7 |
backgouging |
the removal of weld metal and base metal from the weld root side of
a welded joint to facilitate complete fusion and complete joint penetration upon subsequent welding from that side |
| 8 |
backhand welding |
a welding technique in which the welding torch or gun is directed opposite
to the progress of welding |
| 9 |
backing |
a material placed at the root of a weld joint for the purpose of supporting
molten weld metal so as to facilitate complete joint penetration. The material may or may not fuse into the joint. See retainer.
|
| 10 |
backing gas |
a gas, such as argon, helium, nitrogen, or reactive gas, which is employed
to exclude oxygen from the root side (opposite from the welding side) of weld joints |
| 11 |
base metal |
the metal or alloy that is welded, brazed, or cut |
| 12 |
bond line (brazing and thermal spraying) |
the cross section of the interface between a braze or thermal spray
deposit and the substrate |
| 13 |
braze |
a joint produced by heating an assembly to suitable temperatures and
by using a filler metal having a liquidus above 840°F and below the solidus of the base materials. The filler metal is distributed
between the closely fitted surfaces of the joint by capillary action. |
| 14 |
brazer |
one who performs a manual or semiautomatic brazing operation |
| 15 |
brazing |
a group of metal joining processes which produces coalescence of materials
by heating them to a suitable temperature, and by using a filler metal having a liquidus above 840°F and below the solidus
of the base materials. The filler metal is distributed between the closely fitted surfaces of the joint by capillary action.
|
| 16 |
brazing, automatic |
brazing with equipment which performs the brazing operation without
constant observation and adjustment by a brazing operator. The equipment may or may not perform the loading and unloading
of the work. |
| 17 |
brazing, block (BB) |
a brazing process that uses heat from heated blocks applied to the
joint. This is an obsolete or seldom used process. |
| 18 |
brazing, dip (DB) |
a brazing process in which the heat required is furnished by a molten
chemical or metal bath. When a molten chemical bath is used, the bath may act as a flux; when a molten metal bath is used,
the bath provides the filler metal. |
| 19 |
brazing, furnace (FB) |
a brazing process in which the work pieces are placed in a furnace
and heated to the brazing temperature |
| 20 |
brazing, induction (IB) |
a brazing process that uses heat from the resistance of the work pieces
to induced electric current |
| 21 |
brazing, machine |
brazing with equipment which performs the brazing operation under the
constant observation and control of a brazing operator. The equipment may or may not perform the loading and unloading of
the work. |
| 22 |
brazing, manual |
a brazing operation performed and controlled completely by hand. See
automatic brazing and machine brazing. |
| 23 |
brazing, resistance (RB) |
a brazing process that uses heat from the resistance to electric current
flow in a circuit of which the work pieces are a part |
| 24 |
brazing, semiautomatic |
brazing with equipment which controls only the brazing filler metal
feed. The advance of the brazing is manually controlled. |
| 25 |
brazing, torch (TB) |
a brazing process that uses heat from a fuel gas flame |
| 26 |
brazing operator |
one who operates machine or automatic brazing equipment |
| 27 |
brazing temperature |
the temperature to which the base metal(s) is heated to enable the
filler metal to wet the base metal(s) and form a brazed joint |
| 28 |
brazing temperature range |
the temperature range within which brazing can be conducted |
| 29 |
build up of base metal/restoration of base metal thickness |
this is the application of a weld material to a base metal so as to
restore the design thickness and/ or structural integrity. This build-up may be with a chemistry different from the base metal
chemistry which has been qualified via a standard butt-welded test coupon. Also, may be called base metal repair or buildup.
|
| 30 |
butt joint |
a joint between two members aligned approximately in the same plane
|
| 31 |
buttering |
the addition of material, by welding, on one or both faces of a joint,
prior to the preparation of the joint for final welding, for the purpose of providing a suitable transition weld deposit for
the subsequent completion of the joint |
| 32 |
clad brazing sheet |
a metal sheet on which one or both sides are clad with brazing filler
metal |
| 33 |
coalescence |
the growing together or growth into one body of the materials being
joined |
| 34 |
complete fusion |
fusion which has occurred over the entire base material surfaces intended
for welding, and between all layers and beads |
| 35 |
composite |
a material consisting of two or more discrete materials with each material
retaining its physical identity |
| 36 |
consumable insert |
filler metal that is placed at the joint root before welding, and is
intended to be completely fused into the root to become part of the weld |
| 37 |
contact tube |
a device which transfers current to a continuous electrode |
| 38 |
corner joint |
a joint between two members located approximately at right angles to
each other in the form of an L |
| 39 |
coupon |
see test coupon |
| 40 |
crack |
a fracture-type discontinuity characterized by a sharp tip and high
ratio of length and width to opening displacement |
| 41 |
defect |
a discontinuity or discontinuities that by nature or accumulated effect
(for example, total crack length) render a part or product unable to meet minimum applicable acceptance standards or specifications.
This term designates rejectability. See also discontinuity and flaw. |
| 42 |
direct current electrode negative (DCEN) |
the arrangement of direct current arc welding leads in which the electrode
is the negative pole and the work piece is the positive pole of the welding arc direct current electrode positive (DCEP) -
|
| 43 |
discontinuity |
an interruption of the typical structure of a material, such as a lack
of homogeneity in its mechanical, metallurgical, or physical characteristics. A discontinuity is not necessarily a defect.
See also defect and flaw. |
| 44 |
double welded joint |
a joint that is welded from both sides |
| 45 |
double welded lap joint |
a lap joint in which the overlapped edges of the members to be joined
are welded along the edges of both members |
| 46 |
dwell |
the time during which the energy source pauses at any point in each
oscillation |
| 47 |
electrode, arc welding |
a component of the welding circuit through which current is conducted
|
| 48 |
electrode, bare |
a filler metal electrode that has been produced as a wire, strip, or
bar with no coating or covering other than that incidental to its manufacture or preservation |
| 49 |
electrode, carbon |
a nonfiller material electrode used in arc welding and cutting, consisting
of a carbon or graphite rod, which may be coated with copper or other materials |
| 50 |
electrode, composite |
a generic term of multicomponent filler metal electrodes in various
physical forms, such as stranded wires, tubes, and covered electrodes |
| 51 |
electrode, covered |
a composite filler metal electrode consisting of a core of a bare electrode
or metal-cored electrode to which a covering sufficient to provide a slag layer on the weld metal has been applied. The covering
may contain materials providing such functions as shielding from the atmosphere, deoxidation, and arc stabilization, and can
serve as a source of metallic additions to the weld. |
| 52 |
electrode, electroslag welding |
a filler metal component of the welding circuit through which current
is conducted between the electrode guiding member and the molten slag NOTE: Bare electrodes and composite electrodes as defined
under arc welding electrode are used for electroslag welding. A consumable guide may also be used as part of the electroslag
welding electrode system. |
| 53 |
electrode, emissive |
a filler metal electrode consisting of a core of a bare electrode or
a composite electrode to which a very light coating has been applied to produce a stable arc |
| 54 |
electrode, flux cored |
a composite filler metal electrode consisting of a metal tube or other
hollow configuration containing ingredients to provide such functions as shielding atmosphere, deoxidation, arc stabilization,
and slag formation. Alloying materials may be included in the core. External shielding may or may not be used. |
| 55 |
electrode, lightly coated |
a filler metal electrode consisting of a metal wire with a light coating
applied subsequent to the drawing operation, primarily for stabilizing the arc |
| 56 |
electrode, metal |
a filler or nonfiller metal electrode used in arc welding and cutting
that consists of a metal wire or rod that has been manufactured by any method and that is either bare or covered |
| 57 |
electrode, metal cored |
a composite filler metal electrode consisting of a metal tube or other
hollow configuration containing alloying ingredients. Minor amounts of ingredients providing such functions as arc stabilization
and fluxing of oxides may be included. External shielding gas may or may not be used. |
| 58 |
electrode, resistance welding |
the part of a resistance welding machine through which the welding
current and, in most cases, force are applied directly to the work piece. The electrode may be in the form of a rotating wheel,
rotating roll, bar, cylinder, plate, clamp, chuck, or modification thereof. |
| 59 |
electrode, stranded |
a composite filler metal electrode consisting of stranded wires which
may mechanically enclose materials to improve properties, stabilize the arc, or provides shielding |
| 60 |
electrode, tungsten |
a nonfiller metal electrode used in arc welding, arc cutting, and plasma
spraying, made principally of tungsten |
| 61 |
face feed |
the application of filler metal to the face side of a joint |
| 62 |
ferrite number |
an arbitrary, standardized value designating the ferrite content of
an austenitic stainless steel weld metal. It should be used in place of percent ferrite or volume percent ferrite on a direct
one-to-one replacement basis. See the latest edition of AWS A4.2, Standard Procedures for Calibrating Magnetic Instruments
to Measure the Delta Ferrite Content of Austenitic Stainless Steel Weld Metal. |
| 63 |
filler metal |
the metal or alloy to be added in making a welded, brazed, or soldered
joint |
| 64 |
filler metal, brazing |
the metal or alloy used as a filler metal in brazing, which has a liquidus
above 450°C (840°F) and below the solidus of the base metal |
| 65 |
filler metal, powder |
filler metal in particle form |
| 66 |
filler metal, supplemental |
in electroslag welding or in a welding process in which there is an
arc between one or more consumable electrodes and the work piece, a powder, solid, or composite material that is introduced
into the weld other than the consumable electrode(s) |
| 67 |
fillet weld |
a weld of approximately triangular cross section joining two surfaces
approximately at right angles to each other in a lap joint, tee joint, or corner joint |
| 68 |
flaw |
an undesirable discontinuity. See also defect. |
| 69 |
flux (welding/brazing) |
a material used to dissolve, prevent, or facilitate the removal of
oxides or other undesirable surface substances. It may act to stabilize the arc, shield the molten pool, and may or may not
evolve shielding gas by decomposition. |
| 70 |
flux, active (SAW) |
a flux from which the amount of elements deposited in the weld metal
is dependent upon the welding conditions, primarily arc voltage |
| 71 |
flux, alloy (SAW) |
a flux which provides alloying elements in the weld metal deposit flux,
neutral (SAW) - |
| 72 |
flux cover |
metal bath dip brazing and dip soldering. A layer of molten flux over
the molten filler metal bath. |
| 73 |
forehand welding |
a welding technique in which the welding torch or gun is directed toward
the progress of welding |
| 74 |
frequency |
the completed number of cycles which the oscillating head makes in
1 min or other specified time increment |
| 75 |
fuel gas |
a gas such as acetylene, natural gas, hydrogen, propane, stabilized
methyl acetylene propadiene, and other fuels normally used with oxygen in one of the oxyfuel processes and for heating |
| 76 |
fused spray deposit (thermal spraying) |
a self-fluxing thermal spray deposit which is subsequently heated to
coalescence within itself and with the substrate |
| 77 |
fusion (fusion welding) |
the melting together of filler metal and base metal, or of base metal
only, to produce a weld |
| 78 |
fusion face |
a surface of the base metal that will be melted during welding |
| 79 |
fusion line |
a non-standard term for weld interface |
| 80 |
gas backing |
see backing gas |
| 81 |
globular transfer (arc welding) |
a type of metal transfer in which molten filler metal is transferred
across the arc in large droplets |
| 82 |
groove weld |
a weld made in a groove formed within a single member or in the groove
between two members to be joined. The standard types of groove weld are as follows: square groove weld single-Vee groove weld
single-bevel groove weld single-U groove weld single-J groove weld single-flare-bevel groove weld 190 single-flare-Vee groove
weld double-Vee groove weld double-bevel groove weld double-U groove weld double-J groove weld double-flare-bevel groove weld
double-flare-Vee groove weld |
| 83 |
heat affected zone |
that portion of the base metal which has not been melted, but whose
mechanical properties or microstructures have been altered by the heat of welding or cutting |
| 84 |
interpass temperature |
the highest temperature in the weld joint immediately prior to welding,
or in the case of multiple pass welds, the highest temperature in the section of the previously deposited weld metal, immediately
before the next pass is started |
| 85 |
joint |
the junction of members or the edges of members which are to be joined
or have been joined |
| 86 |
joint penetration |
the distance the weld metal extends from the weld face into a joint,
exclusive of weld reinforcement |
| 87 |
keyhole welding |
a technique in which a concentrated heat source penetrates partially
or completely through a work piece, forming a hole (keyhole) at the leading edge of the weld pool. As the heat source progresses,
the molten metal fills in behind the hole to form the weld bead. |
| 88 |
lap or overlap |
the distance measured between the edges of two plates when overlapping
to form the joint |
| 89 |
lap joint |
a joint between two overlapping members in parallel planes |
| 90 |
lower transformation temperature |
the temperature at which austenite begins to form during heating |
| 91 |
melt in |
a technique of welding in which the intensity of a concentrated heat
source is so adjusted that a weld pass can be produced from filler metal added to the leading edge of the molten weld metal
|
| 92 |
oscillation |
for a machine or automatic process, an alternating motion relative
to the direction of travel of welding, brazing, or thermal spray device. See also weave bead. |
| 93 |
overlay |
a non-standard term, used in Section IX, for surfacing. See hard-facing
and corrosion-resistant overlay. |
| 94 |
overlay, corrosion resistant weld metal |
deposition of one or more layers of weld metal to the surface of a
base material in an effort to improve the corrosion resistance properties of the surface. This would be applied at a level
above the minimum design thickness as a nonstructural component of the overall wall thickness. |
| 95 |
overlay, hard facing weld metal |
deposition of one or more layers of weld metal to the surface of a
material in an effort to improve the wear resistance properties of the surface. This would be applied at a level above the
minimum design thickness as a nonstructural component of the overall wall thickness. |
| 96 |
pass |
a single progression of a welding or surfacing operation along a joint,
weld deposit, or substrate. The result of a pass is a weld bead or layer. |
| 97 |
pass, cover |
a final or cap pass(es) on the face of a weld |
| 98 |
pass, wash |
pass to correct minor surface aberrations and/or prepare the surface
for nondestructive testing |
| 99 |
peel test |
a destructive method of testing that mechanically separates a lap joint
by peeling |
| 100 |
peening |
the mechanical working of metals using impact blows |
| 101 |
performance qualification |
the demonstration of a welder's or welding operator's ability to produce
welds meeting prescribed standards |
| 102 |
plug weld |
a weld made in a circular, or other geometrically shaped hole (like
a slot weld) in one member of a lap or tee joint, joining that member to the other. The walls of the hole may or may not be
parallel, and the hole may be partially or completely filled with weld metal. (A fillet-welded hole or spot weld should not
be construed as conforming to this definition.) |
| 103 |
polarity, reverse |
the arrangement of direct current arc welding leads with the work as
the negative pole and the electrode as the positive pole of the welding arc; a synonym for direct current electrode positive
|
| 104 |
polarity, straight |
the arrangement of direct current arc welding leads in which the work
is the positive pole and the electrode is the negative pole of the welding arc; a synonym for direct current electrode negative
|
| 105 |
postbraze heat treatment |
any heat treatment subsequent to brazing |
| 106 |
postheating |
the application of heat to an assembly after welding, brazing, soldering,
thermal spraying, or thermal cutting |
| 107 |
postweld heat treatment |
any heat treatment subsequent to welding |
| 108 |
powder |
see filler metal, powder |
| 109 |
preheat maintenance |
practice of maintaining the minimum specified preheat temperature,
or some specified higher temperature for some required time interval after welding or thermal spraying is finished or until
post weld heat treatment is initiated |
| 110 |
preheat temperature |
the minimum temperature in the weld joint preparation immediately prior
to the welding; or in the case of multiple pass welds, the minimum temperature in the section of the previously deposited
weld metal, immediately prior to welding |
| 111 |
preheating |
the application of heat to the base metal immediately before a welding
or cutting operation to achieve a specified minimum preheat temperature |
| 112 |
pulsed power welding |
any arc welding method in which the power is cyclically programmed
to pulse so that effective but short duration values of a parameter can be utilized. Such short duration values are significantly
different from the average value of the parameter. Equivalent terms are pulsed voltage or pulsed current welding. See also
pulsed spray welding. |
| 113 |
pulsed spray welding |
an arc welding process variation in which the current is pulsed to
utilize the advantages of the spray mode of metal transfer at average currents equal to or less than the globular to spray
transition current |
| 114 |
rabbet joint |
typical design is indicated in QB- 462.1(c), QB-462.4, QB-463.1(c),
and QB-463.2(a) |
| 115 |
retainer |
nonconsumable material, metallic or nonmetallic, which is used to contain
or shape molten weld metal. See backing. |
| 116 |
seal weld |
any weld designed primarily to provide a specific degree of tightness
against leakage |
| 117 |
seam weld |
a continuous weld made between or upon overlapping members in which
coalescence may start and occur on the faying surfaces, or may have proceeded from the surface of one member. The continuous
weld may consist of a single weld bead or a series of overlapping spot welds. See resistance welding. |
| 118 |
short circuiting transfer (gas metal arc welding) |
metal transfer in which molten metal from a consumable electrode is
deposited during repeated short circuits. See also globular transfer and spray transfer. |
| 119 |
single welded joint |
a joint welded from one side only |
| 120 |
single welded lap joint |
a lap joint in which the overlapped edges of the members to be joined
are welded along the edge of one member only |
| 121 |
slag inclusion |
nonmetallic solid material entrapped in weld metal or between weld
metal and base metal |
| 122 |
specimen |
refer to test specimen |
| 123 |
spot weld |
a weld made between or upon overlapping members in which coalescence
may start and occur on the faying surfaces or may proceed from the outer surface of one member. The weld cross section (plan
view) is approximately circular. |
| 124 |
spray fuse |
a thermal spraying technique in which the deposit is reheated to fuse
the particles and form a metallurgical bond with the substrate |
| 125 |
spray transfer (arc welding) |
metal transfer in which molten metal from a consumable electrode is
propelled axially across the arc in small droplets |
| 126 |
stringer bead |
a weld bead formed without appreciable weaving |
| 127 |
surfacing |
the application by welding, brazing, or thermal spraying of a layer(s)
of material to a surface to obtain desired properties or dimensions, as opposed to making a joint |
| 128 |
tee joint (T) |
a joint between two members located approximately at right angles to
each other in the form of a T |
| 129 |
test coupon |
a weld or braze assembly for procedure or performance qualification
testing. The coupon may be any product from plate, pipe, tube, etc., and may be a fillet weld, overlay, deposited weld metal,
etc. |
| 130 |
test specimen |
a sample of a test coupon for specific test. The specimen may be a
bend test, tension test, impact test, chemical analysis, macro-test, etc. A specimen may be a complete test coupon, for example,
in radiographic testing or small diameter pipe tension testing. |
| 131 |
thermal cutting (TC) |
a group of cutting processes that severs or removes metal by localized
melting, burning, or vaporizing of the work pieces |
| 132 |
throat, actual (of fillet) |
the shortest distance from the root of a fillet weld to its face |
| 133 |
throat, effective (of fillet) |
the minimum distance from the fillet face, minus any convexity, to
the weld root. In the case of fillet welds combined with a groove weld, the weld root of the groove weld shall be used. |
| 134 |
throat, theoretical (of fillet) |
the distance from the beginning of the joint root perpendicular to
the hypotenuse of the largest right triangle that can be inscribed within the cross-section of a fillet weld. This dimension
is based on the assumption that the root opening is equal to zero. |
| 135 |
undercut |
a groove melted into the base metal adjacent to the weld toe or weld
root and left unfilled by weld metal |
| 136 |
upper transformation temperature |
the temperature at which transformation of the ferrite to austenite
is completed during heating |
| 137 |
usability |
a measure of the relative ease of application of a filler metal to
make a sound weld or braze joint |
| 138 |
weave bead |
for a manual or semiautomatic process, a weld bead formed using weaving.
See also oscillation. |
| 139 |
weaving |
a welding technique in which the energy source is oscillated transversely
as it progresses along the weld path |
| 140 |
weld |
a localized coalescence of metals or nonmetals produced either by heating
the materials to the welding temperature, with or without the application of pressure, or by the application of pressure alone
and with or without the use of filler material |
| 141 |
weld, autogenous |
a fusion weld made without filler metal |
| 142 |
weld bead |
a weld deposit resulting from a pass. See stringer bead and weave bead.
|
| 143 |
weld face |
the exposed surface of a weld on the side from which welding was done
|
| 144 |
weld interface |
the interface between the weld metal and base metal in a fusion weld
weld metal - |
| 145 |
weld reinforcement |
weld metal on the face or root of a groove weld in excess of the metal
necessary for the specified weld size |
| 146 |
weld size: groove welds |
the depth of chamfering plus any penetration beyond the chamfering,
resulting in the strength carrying dimension of the weld |
| 147 |
weld size: for equal leg fillet welds |
the leg lengths of the largest isosceles right triangle which can be
inscribed within the fillet weld cross section |
| 148 |
weld size: for unequal leg fillet welds |
the leg lengths of the largest right triangle which can be inscribed
within the fillet weld cross section |
| 149 |
welder |
one who performs manual or semiautomatic welding |
| 150 |
welding, arc stud (SW) |
an arc welding process that uses an arc between a metal stud, or similar
part, and the other work piece. The process is used without filler metal, with or without shielding gas or flux, with or without
partial shielding from a ceramic or graphite ferrule surrounding the stud, and with the application of pressure after the
faying surfaces are sufficiently heated. |
| 151 |
welding, automatic |
welding with equipment which performs the welding operation without
adjustment of the controls by a welding operator. The equipment may or may not perform the loading and unloading of the work.
See machine welding. |
| 152 |
welding, consumable guide electroslag |
an electroslag welding process variation in which filler an electrode
and its guiding member supply metal |
| 153 |
welding, electrogas (EGW) |
an arc welding process that uses an arc between a continuous filler
metal electrode and the weld pool, employing approximately vertical welding progression with retainers to confine the weld
metal. The process is used with or without an externally supplied shielding gas and without the application of pressure. Shielding
for use with solid or metal-cored electrodes is obtained from a gas or gas mixture. Shielding for use with flux-cored electrodes
may or may not be obtained from an externally supplied gas or gas mixture. |
| 154 |
welding, electron beam (EBW) |
a welding process that produces coalescence with a concentrated beam
composed primarily of high velocity electrons, impinging on the joint. The process is used without shielding gas and without
the application of pressure. |
| 155 |
welding, electroslag (ESW) |
a welding process producing coalescence of metals with molten slag
which melts the filler metal and the surfaces of the work to be welded. This slag which moves along the full cross section
of the joint as welding progresses shields the molten weld pool. An arc which heats the slag initiates the process. The arc
is then extinguished and the conductive slag is maintained in a molten condition by its resistance to electric current passing
between the electrode and the work. See electroslag welding electrode and consumable guide electroslag welding. |
| 156 |
welding, flux cored arc (FCAW) |
a gas metal-arc welding process that uses an arc between a continuous
filler metal electrode and the weld pool. The process is used with shielding gas from a flux contained within the tubular
electrode, with or without additional shielding from an externally supplied gas, and without the application of pressure.
|
| 157 |
welding, friction (FRW) |
a solid state welding process that produces a weld under compressive
force contact of work pieces rotating or moving relative to one another to produce heat and plastically displace material
from the faying surfaces |
| 158 |
welding, friction, inertia and continuous drive |
processes and types of friction welding (solid state welding process)
wherein coalescence is produced after heating is obtained from mechanically induced sliding motion between rubbing surfaces
held together under pressure. Inertia welding utilizes all of the kinetic energy stored in a revolving flywheel spindle system.
Continuous drive friction welding utilizes the energy provided by a continuous drive source such as an electric or hydraulic
motor. |
| 159 |
welding, gas metal arc (GMAW) |
an arc welding process that uses an arc between a continuous filler
metal electrode and the weld pool. The process is used with shielding from an externally supplied gas and without the application
of pressure. |
| 160 |
welding, gas metal arc, pulsed arc (GMAW P) |
a variation of the gas metal-arc welding process in which the current
is pulsed. See also pulsed power welding. |
| 161 |
welding, gas metal arc, short circuiting arc (GMAWS) |
a variation of the gas metal-arc welding process in which the consumable
electrode is deposited during repeated short circuits. See also short-circuiting transfer. |
| 162 |
welding, gas tungsten arc (GTAW) |
an arc welding process which produces coalescence of metals by heating
them with an arc between a tungsten (nonconsumable) electrode and the work. Shielding is obtained from a gas or gas mixture.
Pressure may or may not be used and filler metal may or may not be used. (This process has sometimes been called TIG welding,
a nonpreferred term. or HeliArc , a trade name) |
| 163 |
welding, gas tungsten arc, pulsed arc (GTAW P) |
a variation of the gas tungsten-arc welding process in which the current
is pulsed. See also pulsed power welding. |
| 164 |
welding, induction (IW) |
a welding process that produces coalescence of metals by the heat obtained
from resistance of the work pieces to the flow of induced high frequency welding current with or without the application of
pressure. The effect of the high-frequency welding current is to concentrate the welding heat at the desired location. |
| 165 |
welding, laser beam (LBW) |
a welding process which produces coalescence of materials with the
heat obtained from the application of a concentrated coherent light beam impinging upon the members to be joined |
| 166 |
welding, machine |
welding with equipment which performs the welding operation under the
constant observation and control of a welding operator. The equipment may or may not perform the loading and unloading of
the work. See automatic welding. |
| 167 |
welding, manual |
welding wherein the entire welding operation is performed and controlled
by hand |
| 168 |
welding, operator |
one who operates machine or automatic welding equipment |
| 169 |
welding, oxyfuel gas (OFW) |
a group of welding processes which produces coalescence by heating
materials with an oxyfuel gas flame or flames, with or without the application of pressure, and with or without the use of
filler metal |
| 170 |
welding, plasma arc (PAW) |
an arc welding process which produces coalescence of metals by heating
them with a constricted arc between an electrode and the work piece (transferred arc), or the electrode and the constricting
nozzle (nontransferred arc). Shielding is obtained from the hot, ionized gas issuing from the torch orifice which may be supplemented
by an auxiliary source of shielding gas. Shielding gas may be an inert gas or a mixture of gases. Pressure may or may not
be used, and filler metal may or may not be supplied. |
| 171 |
welding, projection (PW) |
a resistance welding process that produces coalescence by the heat
obtained from the resistance of the flow of welding current. The resulting welds are localized at predetermined points by
projections, embossments, or intersections. The metals to be joined lap over each other. |
| 172 |
welding, resistance (RW) |
a group of welding processes that produces coalescence of the faying
surfaces with the heat obtained from resistance of the work pieces to the flow of the welding current in a circuit of which
the work pieces are a part, and by the application of pressure |
| 173 |
welding, resistance seam (RSEW) |
a resistance welding process that produces a weld at the faying surfaces
of overlapped parts progressively along a length of a joint. The weld may be made with overlapping weld nuggets, a continuous
weld nugget, or by forging the joint as it is heated to the welding temperature by resistance to the flow of the welding current.
|
| 174 |
welding, resistance spot (RSW) |
a resistance welding process that produces a weld at the faying surfaces
of a joint by the heat obtained from resistance to the flow of welding current through the work pieces from electrodes that
serve to concentrate the welding current and pressure at the weld area |
| 175 |
welding, resistance stud |
a resistance welding process wherein coalescence is produced by the
heat obtained from resistance to electric current at the interface between the stud and the work piece, until the surfaces
to be joined are properly heated, when they are brought together under pressure |
| 176 |
welding, semiautomatic arc |
arc welding with equipment which controls only the filler metal feed.
The advance of the welding is manually controlled. |
| 177 |
welding, shielded metal arc (SMAW) |
an arc welding process with an arc between a covered electrode and
the weld pool. The process is used with shielding from the decomposition of the electrode covering, without the application
of pressure, and with filler metal from the electrode |
| 178 |
welding, stud |
a general term for the joining of a metal stud or similar part to a
work piece. Welding may be accomplished by arc, resistance, friction, or other suitable process with or without external gas
shielding. |
| 179 |
welding, submerged arc (SAW) |
an arc welding process that uses an arc or arcs between a bare metal
electrode or electrodes and the weld pool. The arc and molten metal are shielded by a blanket of granular flux on the work
pieces. The process is used without pressure and with filler metal from the electrode and sometimes from a supplemental source
(welding rod, flux, or metal granules). |
| 180 |
weldment |
an assembly whose constituent parts are joined by welding, or parts
which contain weld metal overlay |
| 181 |
slug |
a piece of material used to fill an excessively wide gap or hole. Not
normally an acceptable practice. |
| 182 |
hot pass |
a term used to describe the 2nd pass over a root pass.Usually in reference
in pipe. In some procedures the 2nd pass is run very hot to assist in burning out "wagon tracks" created by the root pass.
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