摘要
采用金相显微镜、铁素体测量仪、硬度计及力学分析等手段,研究了AISI 304不锈钢的微观组织和力学性能在冷轧过程中的演变规律.试验结果表明:冷轧变形可使AISI 304不锈钢产生形变诱发马氏体相变,试样中金属晶粒沿着轧制方向被拉扁拉长;在冷轧压下量较小时,仅有少量的奥氏体相转变为马氏体相,并且马氏体组织以板条状出现;冷轧压下量较大时,金属晶粒逐渐被拉长为纤维状;随着冷轧压下量的增大,马氏体体积分数、硬度和抗拉强度均随之增大,但延伸率逐步下降.
Evolution of the microstructure and mechanical properties of AISI 304 stainless steels in coldrolled was investigated by means of metallurgical microscopy,ferrite content measuring instrument,hardness tester and mechanical analysis.The results reveal that deformation-induced martensitic transformation can be produced in AISI 304 stainless steels by cold-rolled,and the metal grains of the specimens are extended and oriented along the rolling direction.When the cold-rolled thickness reduction degree is small,only a very small fraction of the austenite phase is transformed into the martensite phase,and the martensite phase appears in the form of laths.When the cold-rolled thickness reduction degree is large,the metal grains are gradually elongated to be fibrous.With the increase of thickness reduction degree,the volume fraction of martensite,hardness and tensile strength are on rise,but the elongation gradually decreases.
出处
《东华大学学报（自然科学版）》
CAS
CSCD
北大核心
2015年第4期518-520,531,共4页
Journal of Donghua University(Natural Science)
基金
河南省基础与前沿技术研究资助项目(142300410016)
上海师范大学一般科研资助项目(SK201224)
关键词
冷轧
形变马氏体
AISI
304不锈钢
压下量
cold-rolled
deformation-induced martensite
AISI 304 stainless steel
thickness reduction degree
