2023年第1期时效时间对HC180BD+Z烘烤硬化钢组织和性能的影响宋青1,王立辉2,潘应君1,齐建军2,幸报1(1.武汉科技大学材料与冶金学院,湖北武汉430081;2.河钢材料技术研究院,河北石家庄050023)摘要:利用多功能金相显微镜、材料万能试验机、场发射扫描电子显微镜和电子背散射仪以及透射电镜对烘烤硬化钢HC180BD+Z在自然时效中金相组织、烘烤硬化性能、织构和第二相粒子进行了研究。结果表明,经过3个月、6个月、9个月、12个月自然时效期,HC180BD+Z钢平均晶粒尺寸逐渐增大,且晶粒尺寸的增大使{111}有利织构减少;在时效过程中存在MnS、CuS、AlN、Ti(C、N)、NbC等第二相粒子析出,且Ti(C、N)、NbC总是以伴随析出的形式出现,在六个月时效后逐渐减少;且该钢种在6个月时效期内拥有优异的烘烤硬化性能。关键词:烘烤硬化钢;力学性能;金相组织;织构中图分类号:TG156.92文献标识码:A文章编号:2095-5014(2023)01-0003-07EffectofAgingTimeonMicrostructureandPropertiesofHC180BD+ZSteelSONGQing1,WANGLihui2,PANYingjun1,QIJianjun2,XINGbao1(1.SchoolofMaterialsandMetallurgy,WuhanUniversityofScienceandTechnology,Wuhan430081,China;2.HegangMaterialsTechnologyResearchInstitute,Shijiazhuang050023,China)ABSTRACT:Themetallographicstructure,bake-hardeningproperties,textureandsecondphaseparticlesofbake-hardeningsteelHC180BD+Zduringnaturalagingwerestudiedbymultifunctionalmetallographicmicroscope,materialuniversaltestingmachine,fieldemissionscanningelectronmicroscope,electronbackscattererandtransmissionelectronmicroscope.Theresultsshowthatafter3months,6months,9monthsand12monthsofnaturalagingperiod,theaveragegrainsizeofHC180BD+Zsteelgraduallyincreases,andtheincreaseofgrainsizereducesthe{111}favorabletexture.Intheagingprocess,thereareMnS,CuS,AlN,Ti(C,N),NbCandothersecond-phaseparticlesprecipitation,andTi(C,N)andNbCalwaysappearintheformofaccompanyingprecipitation,whichgraduallydecreasesaftersixmonthsofaging.Andthegradehasexcellentbake-hardeningpropertieswithinthe6-monthagingperiod.KEYWORDS:bakedhardeningsteel;mechanicalproperties;metallographicstructure;texture收稿日期:2022-10-26第一作者简介:宋青(1997...