不锈钢薄板高频冷焊与TIG焊接头的性能对比.pdfVIP

HotWorkingTechnology2

2023,Vol.52,No.7

不锈钢薄板高频冷焊焊接头的性能对比

周传昆，王伟，娄双涛，陆凯雷

（常州博瑞电力自动化设备有限公司，江苏常州213025)

摘要：开展了0.5mm厚304不锈钢板高频冷焊与TIG焊接头性能对比试验。结果表明：相比TIG焊工艺，在高

频脉冲电流作用下，低热输人量使得冷焊的焊缝宽度小了50%、最大焊接变形量小了23.8%，接头周围的氧化程度更

低。连续交替的未焊透和弧坑缺陷使得焊缝成为冷焊接头的最薄弱区域，抗拉强度及伸长率分别低于TIG焊的约5.9%

和10.1%。但接头抗拉强度的稳定性达到TIG焊的3.6倍。低热输入也使得冷焊接头焊缝区的柱状晶及热影响区的奥

氏体粗大程度较TIG焊的低。高频冷焊技术可满足薄板焊接的实际需求。

关键词：高频冷焊；TIG焊；不锈钢；拉伸性能

D0I:10.14158/ki.1001-3814

中图分类号：TG444+.74文献标识码：A

yColdWelding

PerformanceComparisonBetweenHighFrequency

andTIGWeldingofStainlessSheetSteel

ZHOUChuankun,WANGWei,LOUShuangtao,LUKailei

(NRElectricPowerElectronicsCo.,Ltd.,Changzhou213025,China)

Abstract:TheperformanceofhighfrequencycoldweldingjointandTIGweldingjointof0.5mmthick304stainless

steelsheetwascompared.TheresultsshowthatcomparedwithTIGweldingprocess,undertheactionofhighfrequencypulse

current,lowheatinputmakesthewidthofcoldweldingseamreduceby50%,themaximumweldingdeformationreduceby

23.8%,andtheoxidationdegreearoundthejointisevenlower.Continuousandalternateincompletepenetrationandcrater

defectsmaketheweldtheweakestzoneofthecoldweldedjoint,andthetensilestrengthandelongationareabout5.9%and

10.1%lowerthanthoseofTIGweldingjoint,respectively.However,thetensilestrengthstabilityofthejointcanreach3.6

timesofthatofTIGweldingjoint.ThelowheatinputalsomakesthecolumnarcrystalintheWZandaustenitecoarsenessin

theHAZofcoldweldedjointlowerthanthatofTIGwelding.T