焊接热输入对6082铝合金焊接接头组织性能的影响.pdfVIP

HotWorkingTechnology2021,Vol.50,No.17

焊接热输入对6082铝合金焊接接头

组织性能的影响

杨春艳，贺英姿，杨飞，马玉亮，史维

(陕西柴油机重工有限公司，陕西兴平713100)

摘要：6082铝合金薄板焊接接头热影响区存在明显的软化现象，拉伸试验时试样的断裂位置多数在热影响区，

焊接接头常因抗拉强度不足而导致焊接工艺评定试验失败。通过严格控制焊前工艺准备，采用TIG焊接工艺，研究了

不同焊接电流和焊接速度下焊接热输入对6082铝合金焊接接头组织和性能的影响。发现对于厚度为3mm的6082铝

合金试板，焊接热输入控制在0.291〜0.334kJ/mm时，焊接接头的抗拉强度可满足要求。

关键词：焊接电流；焊接速度；热输入；6082铝合金

DOI:10.14158/j.cnki.1001-3814.

中图分类号：TG457.14文献标识码：A文章编号：1001-3814(2021)17-0142-02

EffectofWeldingHeatInputonMicrostructureandProperties

of6082AluminumAlloyWeldedJoints

YANGChunyan,HEYingzi,YANGFei,MAYuliang,SHIWei

(ShaanxiDieselEngineHeavyIndustryCo.,Ltd.,Xingping713100,China)

Abstract：Thereisanobvioussofteningphenomenonintheheataffectedzoneoftheweldedjointof6082aluminum

alloysheet.Inthetensiletest,thefracturepositionofthesamplesismostlyintheheataffectedzone.Theweldingprocess

qualificationtestisoftenfailedbecauseoftheinsufficienttensilestrengthoftheweldedjoint.Throughstrictcontrolofprocess

preparationbeforewelding,andadoptingtheTIGweldingprocess,theeffectofweldingheatinputonthemicrostructureand

mechanicalpropertiesof6082aluminumalloyweldedjointunderdifferentweldingcurrentandweldingspeedwasstudied.

Theresultsshowthatfor3mmthick6082aluminu