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时间:2020-04-30
《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
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