This standard classifies the defects that may occur in metal resistance welding joints according to their nature, shape and location. This standard does not cover the conditions and causes of defects, nor does it consider metallurgical changes. This standard applies to metal resistance welding. JB/T 6043-1992 Defect classification of metal resistance welding joints JB/T6043-1992 Standard download and decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
Defect Classification of Metal Resistance Welding JointswwW.bzxz.Net
Subject Content and Scope of Application
JB/T 6043--92
This standard covers metal resistance welding Possible defects in the head are classified according to their nature, shape and location. This standard does not cover the conditions and causes of defects, nor does it consider metallurgical changes. This standard applies to metal resistance welding. 2 Reference standards
GB3375 welding terminology
GB5185 Representation code of metal welding and brazing methods on drawings 3 Defect classification
Metal resistance welding joint defects are divided into the following 6 types: No. Type 1 cracks
Type 2 holes
Type 3
Solid defects
Type 4 fusion defects
Type 5 shape defects||tt ||Other defects of Category 6
4 Defect classification principles and codes
Defects are divided into major categories according to their nature, and into sub-categories according to their location and status. Defects are represented by a set of numbers. In front of each set of numbers, according to the provisions of GB5185, 2\ represents metal resistance welding, and is separated from the other numbers by dots. When it is not mixed and slippery, the welding method code 2 does not need to be used.
Each set of numbers only represents a specific type of defect, for example: 1200 represents nugget edge cracks; 1400 represents heat-affected zone cracks. If the defects include several types, each group of numbers is represented by a slash separated by a combination, for example: 1200/1400 represents cracks from the edge of the nugget to the heat-affected zone.
The defect codes and names of various defects comply with the provisions of GB3375, as shown in Table 1. Table 1 Defect code and name
Defect code name
2·100
Crack
Said
Ming
Type 1 crack| |tt|| It is mainly two-dimensional localized material cracking. It can appear singly or in groups and can be divided into the following types. Approved by the Ministry of Mechanical and Electronics Industry of the People's Republic of China on May 05, 1992 248
Simple
Picture
1993-07-01 Implementation
Defect code
2·101
2·1011
2·1013| |tt||2·1014
2-102
2+1021
2-1024
2-1100
2·1200||tt ||2·1300
Name
Longitudinal crack
Transverse crack
Nugget center
Crack
Nugget edge||tt ||Crack
Joint plane
Crack
Said
JB/T6043
Continued Table 1
Ming
. 92
Cracks in the direction of the parallel resistance butt welding seam, which can exist in the welding seam
in the heat affected zone
in the unaffected base metal| |tt||Cracks in the direction of the resistance butt weld seam, which can exist: in the welded joint
in the unaffected base metal
mostly star-shaped cracks
most It is a retreat point crack
crack extending to the edge of the nugget
21013
+120
heat-affected zone
·1100
249
Defect code
2·1400
2-1500
2-1600
Name
Title
Hot Shadow area
crack
base material crack
surface crack
2·1700 hook cracks
hole
2·200 holes
2201
2011
250
Spherical pores
say
JB/T6043—92
Continued Table 1| | tt | |.
Gas-filled holes generated in the nugget, weld or welding heat-affected zone
Approximately spherical gas holes
Defect code name
Name
2 ·2012
2·2013
Uniformly distributed stomata
Part set
Stomata
2·2016 Insect-shaped stomata
2-202
shrink
hole
2300 solid inclusions
2·303
oxide inclusions
miscellaneous
say|| tt||Multiple dispersed gas holes
Local clustered pore groups
JB/T 6043--92
Continued Table 1
Ming
Insect-shaped gas holes in various locations, appearing singly or in clusters
Irregular outer pits
Type 3 solid defects
Solid phase dissimilar materials in the nugget or weld Thin non-metallic (oxide) inclusions in the inclusion nugget or weld appear singly or in clusters
251
Defect code
30
Called||tt ||Dissimilar metals
Inclusion
2·305
Shuang
306
2 40f
2·401
2·403
2·404
2·500
2·501
252
Low melt slag inclusion
fusion defect| | tt | |tt||say
IB/T 6043
Continued Table 1
Peng
Dissimilar metal inclusions in welds
92||tt| |Non-metallic deposits appear singly or in aggregate in the nugget or flash seam
Residual low-melting inclusions surrounded by solidifying metal in the weld
Category 4 fusion defects|| tt||No fusion or poor fusion on the laminating surface. The workpiece has no fusion on the laminating surface
The workpiece has only partial fusion or poor fusion on the laminating surface. Poor bonding between the workpiece and the foil
Category 5 shape defects
The shape of the welded joint deviates from the original design
First
2 +501
Defect code
2·502||tt ||2·507
2-508
2·520
2·521
5211
2·5212
name| | tt | Wrong
Poor
The nugget is too thin
or the weld marrow is too thin
narrow
the nugget is too thick
or the weld seam is too thick| |tt||Width
Said
The workpieces to be welded are staggered in parallel
JB/T6043--92
Continued Table 1
Ming||tt ||The workpiece to be welded constitutes an undue angle difference
The size and shape of the workpiece to be welded do not meet the requirements
The nugget or welding weld size deviates from the design value. The nugget is too large or the butt weld is too large. Narrow, less than the allowable value. The nugget is too thick or the butt weld is too wide, greater than the allowable value.
Specified value
2502
2·5211
7|| tt||Rated value
2-5211
Rated value
5212
Rated value
2*5212
Rated value|| tt||253
Defect code
[Name
2-5213
25214
2·5215
2-5216|| tt||2-522
2-523
254
Nugget diameter
Too small
Nugget diameter
Too large
Nugget or welding
Seam asymmetry
One side penetration
Insufficient rate
Single side burn-through
Solder joint or Welding
Seam burn-through
The nugget diameter is less than the specified value
The nugget diameter is greater than the specified value
JB/T6043--92
Continued Table 1
Multiple
The shape and position of the nugget or weld are asymmetrical
The weld penetration rate on one side with the fitting surface as the axis is too small due to the splash of the fused metal, resulting in pocket holes||tt ||Perforation due to metal splash surface in the welding area
Specified value
Specified value
Figure
: 5213
5214
- 521
Defect code
2-524
2-525
2·526
2·5261
2-5262|| tt||2+5263
2·5264
name
name
heat affected zone
too large
tunnel over limit
Surface shape
Defects
Sag
Surface protrusions
Electrode material
Adhesion
Electrode indentation| |tt||Defect
, the indentation is too large
2·52641
The indentation is too deep
2·52642
2-52643|| tt||2·5265
2-5266
2·5267
2-5268
2·527
Electrode indentation||tt| |Uneven
Piece surface
Melting
Conductive contact
Zone melting
Clamping damage
Coating damage||tt ||The nugget is not connected
Short
Said
JB/T 6043--92
Continued Table 1
Ming
The gap between the welding workpieces exceeds the allowable value
The allowable shape deviation of the surface of the workpiece to be welded after welding The surface of the workpiece in the nugget area partially collapses
The bulge or flash formed at the edge of the electrode pressure The electrode material adheres to the workpiece surface
Inadmissible electrode pressing (does not meet the specified value), it can be:
The pressing diameter is too large
The depth or diameter is not Uniform
Melting of the conductive contact area on the workpiece surface
Mechanical damage at the clamping area of ??the workpiece surface
Discontinuous nugget welds, such as too large a spacing between welding points or too small a welding point||tt ||8-5262
255
Defect code: name
2·528
2·529
2·530
2 ·600
2602
2·610
2·611
Welding seam misalignment
The welding seam position is not aligned| |tt||say
foil jar bits! The two foils are misaligned with each other
Bent joint
Other defects
Splash
Oxidation color
Dimensional deviation
Additional notes: || tt |
Defects that cannot be classified into Category 1 to Category 5
The oxidized surface of the extruded metal welding point or weld zone that sticks to the surface of the workpiece or between the welded workpieces
and regulations Dimensional deviation
This standard is proposed and managed by the Harbin Welding Research Institute of the Ministry of Mechanical and Electronic Industry. This standard is drafted by Harbin Welding Research Institute. The main drafter of this standard is Ji Wenjing.
256
Specified position
Picture
2528
t 6
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