Super304H异种钢焊接接头的组织结构和力学性能.pdf

《Super304H异种钢焊接接头的组织结构和力学性能.pdf》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、第23卷第2期中国有色金属学报2013年2月、，01．23NO．2TheChineseJournalofNonferrousMetalsFeb．2013文章编号：1004．0609(2013)02—0396-07T92／Super304H异种钢焊接接头的组织结构和力学性能张祺，王家庆2陈国宏2刘俊建，化建，余新海，张涛，张建华，汤文明f1．合肥工业大学材料科学与工程学院，合肥230009；2．安徽省电力科学研究院，合肥230601；3．合肥津利能源科技发展有限公司，合肥230601)摘要：采用钨极氩弧焊(GTAW)技术，采

2、用ERNiCr-3和ERNiCrMo．3两种镍基焊丝实施T92／Super304H异种钢焊接，并对接头的显微组织结构及力学性能进行测试分析。结果表明：T92侧热影响区(HAZ)中粗晶区析出大量的第二相颗粒，细晶区则为细小的索氏体组织；Super304H侧HAZ奥氏体晶粒长大，晶界析出明显；ERNiCr-3焊接的焊缝组织呈胞状结构，晶粒粗大；ERNiCrMo．3焊接的焊缝组织呈柱状晶组织特征。ERNiCrMo-3焊接的接头强度、塑性及硬度较大，拉伸断裂位于Super304H母材；而ERNiCr-3焊接的接头强度、硬度较低，但

3、冲击韧性较高，拉伸断裂位于焊缝。关键词：T92钢；Super304H钢；异种钢焊接接头；微观组织；力学性能中图分类号：TG14；TG115文献标志码：AMicrostructuresandmechanicalpropertiesofT92／Super304HdissimilarsteelweldjointsZHANGQi，WANGJia—qing，CHENGuo．hong，LIUJun-jian，HUAJian，YUXin．hai，ZHANGTao，ZHANGJian．hua1TANGWen．ming,(1．Schoolo

4、fMaterialsScienceandEngineering，HefeiUniversityofTechnology,Hefei230009，China；2．AnhuiInstituteofElectricPowerScience，Hefei230601，China；3．HefeiJinliPowerScienceandTechnologyCo．，Ltd．，Hefei230601，China)Abstract：T92／Super304Hdissimilarsteeljointswereproducedthroughgas

5、tungstenarcwelding(GTAW)technique，usingtwoNi—basedweldingwiresofERNiCr-3andERNiCrMo一3，respectively．Themicrostructuresandmechanicalpropertiesofthejointswerethenstudied．Theresultsshowthatintheheat·afectedzone(HAZ)oftheT92side，lotsofsecond-phaseparticlesprecipitateal

6、ongthegrainboundariesandinsidethegrainsoftheprioraustenites．ThefinegrainzoneoftheT92sideHAZisofasorbitestructure．IntheSuper304HsideHAZ，theausteniticgrainsgrowuprapidlywithlotsofprecipitatesalongthegrainboundaries．TheERNiCr-3weldingseaminthejointisofacoarsecellular

7、structure．Comparatively,theERNiCrMo-3weldingseamisofdensecolumnargrains．TheERNiCrMo-3weldedjointshavehigherstrength，ductilityandhardness，however,theERNiCr-3weldedjointshaveahigherimpacttoughnessvalue．MoreoveqthetensilefractureoftheformerstakesplaceintheSuper304Hba

8、semetal，whilethatofthelattershappensintheweldingseam．Keywords：T92steel；Super304Hsteel；dissimilarsteelweldjoint；microstructure；mechanicalproperties基金项目安徽