Application of Q-P-T process in Mn-Si-Cr series carbide-free bainite/martensite/austenite triplex steels
- 作者：TAN ZhunliGAO GuhuiGUI XiaoluBAI Bingzhe
- 会议时间：2013-06-01
- 关键词：quenching-partitioning-tempering ; carbide-free bainite ; partitioning time
- 作者单位：TAN Zhunli,GAO Guhui,GUI Xiaolu(Mat Sci & Eng Res Center,Beijing Jiao tong Univ,Beijing 100044,China)BAI Bingzhe(Mat Sci & Eng Res Center,Beijing Jiao tong Univ,Beijing 100044,China;Dept Mat Sci & Eng,Key Lab Adv Mat,Tsinghua Univ,Beijing 100084,China)
- 母体文献：第五届宝钢学术年会论文集
- 会议名称：第五届宝钢学术年会
- 会议地点：上海
- 主办单位：中国金属学会
- 语种：chi
摘要
Quenching-Partitioning ( Q-P) and Quenching-Partitioning-Tempering ( Q-P-T) process have received extensive attention and demonstrated a huge potential of application.Several Q-P-T processes were successfully applied to a Mn-Si-Cr alloyed steel 40Mn2Si2Cr in this work.The results showed that as-treated steel has a good combination of high strength and adequate ductility under the absence of expensive alloy elements ( e.g.Ni,Mo and Nb et al.).Its tensile strength,elongation as well as product of strength and elongation ( PSE) can reach over 1650MPa,~ 20% and over 33.0GPa% respectively.It is showed that carbide-free bainite ( CFB) formed in quenching step of Q-P-T treatment is benificial to the enhancement of overall properties.Most importantly,partitioning time can be significantly prolonged from conventional < 60s to 60 minutes ( or even longer) in Q-P-T process,which may bring a new group of advanced high-strength steels ( AHSS).