时效时间对HC180BD+Z烘烤硬化钢组织和性能的影响  

Effect of Aging Time on Microstructure and Properties of HC180BD+Z Steel

作　　者：宋青 王立辉 潘应君[1] 齐建军 幸报 SONG Qing;WANG Lihui;PAN Yingjun;QI Jianjun;XING bao(School of Materials and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China;Hegang Materials Technology Research Institute,Shijiazhuang 050023,China)

机构地区：[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

出　　处：《金属材料与冶金工程》2023年第1期3-9,共7页Metal Materials and Metallurgy Engineering

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。The metallographic structure,bake-hardening properties,texture and second phase particles of bake-hardening steel HC180BD + Z during natural aging were studied by multifunctional metallographic microscope,material universal testing machine,field emission scanning electron microscope,electron backscatterer and transmission electron microscope.The results show that after 3 months,6 months,9 months and 12 months of natural aging period,the average grain size of HC180BD+Z steel gradually increases,and the increase of grain size reduces the {111} favorable texture.In the aging process,there are MnS,CuS,AlN,Ti(C,N),NbC and other second-phase particles precipitation,and Ti(C,N)and NbC always appear in the form of accompanying precipitation,which gradually decreases after six months of aging.And the grade has excellent bake-hardening properties within the 6-month aging period.

关 键 词：烘烤硬化钢 力学性能 金相组织 织构 

分 类 号：TG156.92[金属学及工艺—热处理]