双相不锈钢的焊接工艺研究

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1、学号1010131030_毕业论文（设计）课题双相不锈钢的焊接工艺研究学生姓名罗浩院部机械工程学院专业班级10金属材料工程（2）班指导教师杨付双二〇一四年六月双相不锈钢的焊接工艺研究摘要双相不锈钢是由奥氏体和铁素体两相组织按一定比例所组成，它兼有奥氏体不锈钢和铁素体不锈钢的性能。与单相组织的不锈钢相比较，具有强度高的特征。近年来，双相不锈钢应用范围迅速扩大，已成为奥氏体不锈钢在许多应用领域最有力的竞争对手。本论文首先介绍双相不锈钢的定义、分类和性能以及其内部组织和化学成分,并且具体对每一种化学成分进行介绍.然后阐述针对不同的双相不锈钢焊接方法

2、的选择,焊接设备的选用,焊接材料的选择,焊接工艺参数的制定等等.最后以2205双相不锈钢为例重点阐述其焊接工艺研究。关键词：焊接工艺;焊接参数;焊条电弧焊。TheWeldingProcessof duplexstainlesssteelAbstractDuplexstainlesssteelismadeofausteniteandferritetwo-phasestructurecomposedbyacertainpercentage,whichcombinestheperformanceofausteniticstainlesssteela

3、ndferriticstainlesssteels.Comparedwiththesinglephasestainlesssteelwithhighstrengthcharacteristics.Inrecentyears,therapidlyexpandingrangeofapplicationsofduplexstainlesssteel,austeniticstainlesssteelhasbecomethemostpowerfulcompetitorinmanyapplications.Thispaperintroducesthede

4、finitionofduplexstainlesssteel,classificationandperformanceaswellasitsinternalorganizationandchemicalcomposition,andspecificchemicalconstituentsforeachpresentation.Thenexplainedthechoiceforchoosingdifferentmethodsofduplexstainlesssteelwelding,weldingequipment,Finallyin2205a

5、sanexamplefocusesontheselectionofweldingparametersforweldingmaterials,etc.todeveloptheirresearchweldingprocess.Keyword:Weldingprocess;Processparameters;SMAW目录摘要Abstract第1章双相不锈钢···························································11.1双相不锈钢的定义和分类························

6、··························11.1.1双相不锈钢的定义·····················································11.1.2双相不锈钢的分类·····················································11.2双相不锈钢的组织和性能··················································11.2.1双相不锈钢的基本组织特征·······························

7、··············11.2.2双相不锈钢的基本性能·················································11.3双相不锈钢的化学成分····················································2第2章双相不锈钢的焊接····················································42.1双相不锈钢的焊接材料及选用···············································4

8、2.1.1双相不锈钢的焊接材料··················································42.1.2对焊缝金属的要求···