【摘要】 采用0.08C-1.2Mn-0.15Si成分钢,研究了γ+α两相区退火+淬火工艺对不同初始组态钢板组织及力学性能的影响.在相同热处理制度下,初始晶粒越细,马氏体体积分数越多;同一初始组态钢板.保温时间在2～30 min内,随着保温时间延长,马氏体体积分数缓慢增长;经热处理后,得到铁素体+马氏体双相钢的力学性能:抗拉强度600 MPa级,加工硬化指数n值为0.17～0.22,屈强比0.50～O.60,延伸率大于20%.更多还原

【Abstract】 The 0.08C-1.2Mn-0.15Si steel was investigated for the effect of annealing and quenching processes inγ+αregion on the microstructures and properties of such strips of which the initial structures are different.It was found that under the same heat-treatment regime the finer the grains are,the more the volume fraction of martensite is.If the initial structures are the same,the volume fraction of martensite increases slowly with the lengthening holding time for 2～30 min.The tensile strength of specimens comes up to 600 MPa after annealing and quenching processes,and the initial work hardening index n varies in the range 0.17～0.22,with the ratio R_el/R_m 0.5～0.6 and percentage elongation higher than 20%.更多还原