低碳钢/高铬铸铁双金属材料组织及性能研究汪沙1,王铁君1,李传博1,宋大拙2,石林2,孙利星2(1.比亚迪汽车弗迪科技制动器工厂,陕西西安710100;2.西安理工大学材料科学与工程学院,陕西西安710048)摘要:本实验通过真空熔渗扩散连接的方法,在不同结合温度下制备了高铬铸铁/低碳钢双金属材料,对其组织形貌进行观察,并对界面剪切强度及显微硬度进行测试。实验结果表明,在1010、1030、1050℃下连接的界面组织形貌明显不同,在1030℃的结合温度下剪切强度为320MPa;在1010℃及1050℃下剪切强度分别为298MPa和318MPa。在1010℃结合温度下CuCr中间层厚度达到90μm,表明温度过低各元素扩散速率缓慢;1050℃时CuCr中间层软化明显,最终形成的扩散层较窄且存在金属间化合物和显微孔洞,降低了双金属界面结合强度。关键词:扩散连接;低碳钢;高铬铸铁;显微组织;强度中图分类号:TG143文献标识码:A文章编号:1000-8365(2023)03-0252-05ResearchontheMicrostructureandPropertiesofMildSteel/HighChromiumIronBimetalMaterialsWANGSha1,WANGTiejun1,LIChuanbo1,SONGDazhuo2,SHILin2,SUNLixing2(1.BYDFodiTechnologyBrakeFactory,Xi'an710100,China;2.SchoolofMaterialsScienceandEngineering,Xi'anUniversityofTechnology,Xi'an710048,China)Abstract:Inthiswork,highchromiumiron/mildsteelbimetallicmaterialswithdifferentbondingtemperatureswerepreparedusingthemethodofvacuummeltinfiltrationdiffusionbonding.Themicrostructureofthebimetallicmaterialswasobserved.Simultaneously,theinterfaceshearstrengthandmicrohardnessofthebimetallicmaterialsweretested.Theresultsshowthatthemicrostructuresoftheinterfaceofthebimetallicmaterialsaresignificantlydifferentat1010℃,1030℃and1050℃.Theinterfaceshearstrengthofthebimetallicmaterialsis320MPaat1030℃,298MPaat1010℃and318MPaat1050℃.ThethicknessoftheCuCrinterlayerreaches90μmat1010℃,indicatingthatthediffusionrateofelementsisslowatlowtemperature.At1050℃,theCuCrinterlayersoftensobviously,andthediffusionlayerisnarrowwithintermetalliccompoundsandmicroscopicpores,whichreducestheinterfaceshearstrengthofbimetallicmaterials.Keywords:diffusionbonding;mildsteel;high-chromiumiron;microstructure;strength收稿日期:2022-09-20基金项目:国家自然...