焊缝及外观质量验收规范Word文档格式.docx
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nominalthroatthicknessofthefilletweld
b–焊接熔化金属的宽度
widthofweldreinforcement
h–缺陷尺寸(高度或宽度)
heightorwidthofimperfection
s–对接焊缝的名义厚度
nominalbuttweldthickness
t–壁厚或板厚
wallorplatethickness
z–角焊缝的腿长
leglengthofafilletweld
α-焊趾的角度
angleofweldtoe
四.参考文件NormativeReferences
ISO5817:
2007Welding–Fusion-weldedjointsinsteel,nickel,titaniumandtheiralloys(beamweldingexcluded)–Qualitylevelsforimperfections
ISO6520:
2007Weldingandalliedprocesses–Classificationofgeometricimperfectionsinmetallicmaterials–Part1:
Fusionwelding
五.标准等级的选用InspectionQualityLevelSelection
下表对焊接的不同缺陷进行了分类和定义,B级为最高焊接要求的检验级别,C级为正常焊接要求的检验级别,D级为较低焊接要求检验级
Belowtabledefinetheweldinglimitsforimperfectionforqualitylevels.QualitylevelBcorrespondstothehighestrequirementonthefinishedweld.
QualitylevelCcorrespondstothenormalrequirementonthefinishedweld.QualitylevelDcorrespondstothelowerrequirementonthefinishedweld.
假如没有特殊规定,除了焊缝表面不允许有焊渣异物掺杂和不允许有为完全融合和渗透以外,所有焊接产品的检验等级为C级,参见下面的表单
Ifnoanyspecifiedexceptnoslaginclusionandlackoffusion/penetration,thequalitylevelCwillbedefaultselection.Detaildefinitionreferredtothetableasbelow.
焊接缺陷名称
ImperfectionDesignation
ISO6520-1Reference
说明
Remarks
厚度tmm
验收标准D
QualityLevelD
验收标准C
QualityLevelC
验收标准B
QualityLevelB
裂纹
Cracks
100
任何可见裂纹Anyvisualcracks
>
=0.5
不允许
NotPermitted
弧坑裂纹
CraterCrack
104
表面气孔
SurfacePores
2017
单个气孔的最大尺寸
Maximumdimensionofasingleporefor
--对接焊缝Buttwelds
--角焊缝Filletwelds
0.5to3
d<
=0.3s
d<
=0.3a
3
=0.3s,butmax.3mm
=0.3a,butmax.3mm
=0.2s,butmax.3mm
开口弧坑
Craterpipe
2025
h<
=0.2t
=0.2t,butmax.2mm
=0.1t,butmax.1mm
未熔合(未完全熔合)
Lackoffusion(incompletefusion)
-
根部未焊透
Incomplete
4021
只适用于单边对接焊缝
Onlyforsinglesidebuttwelds
短缺陷允许存在:
Shortimperfections
连续咬边
Continuousundercut
间断咬边
Intermittentundercut
5011
5012
要求圆滑过渡
Smoothtransitionisrequired.
不能连续出现
Thisisnotregardedasasystematicimperfection
短缺陷允许存在
Shortimperfections:
=0.2t
=0.1t
=0.2t,butmax.1mm
=0.1t,
butmax.0.5mm
=0.05t,
根凹
Shrinkagegroove
5013
Smoothtransitionisrequired
=0.2mm+0.1t
NotPermitted
=0.2tbutmax.2mm
=0.1tbutmax.1mm
=0.05tbutmax.0.5mm
余高过高(对接焊缝)
Excessweldmetal(buttweld)
要求圆滑过渡Smoothtransitionisrequired
=1mm+0.25b,butmax.10mm
=1mm+0.15b,butmax.7mm
=1mm+0.1b,butmax.5mm
ISO6520-1
参考号
焊缝凸度(角焊缝)
Excessiveconvexity(filletwelds)
503
=0.5
=1mm+0.25b,butmax.5mm
=1mm+0.15b,butmax.4mm
=1mm+0.1b,butmax.3mm
焊透过大
Excesspenetration
504
=1mm+0.6b
=1mm+0.3b
=1mm+0.1b
=1mm+1.0b,butmax.5mm
=1mm+0.6b,butmax.4mm
=1mm+0.2b,butmax.3mm
焊缝过渡不良
Incorrectweldtoe
505
-Buttwelds(对接焊)