论文部分内容阅读
研究了00Cr22Ni5Mo3N双相钢退火保温时间与显微组织、力学性能的关系。结果表明:在800℃下保温退火30 s时,马氏体呈块状分布在铁素体晶粒之间;保温退火60 s时,马氏体和铁素体均匀分散,晶粒细化;保温90 s时,组织以马氏体为主,铁素体含量极低。在800℃保温退火60 s时,钢的伸长率最高、屈强比最低,具有较好的力学性能。因此,综合考虑实际生产效率及冲压需求,最终确定保温时间为60 s。
The relationship between annealing temperature and microstructure and mechanical properties of 00Cr22Ni5Mo3N duplex steel was studied. The results show that the martensite is agglomerate distributed between the ferrite grains when the steel is annealed at 800 ℃ for 30 s. The martensite and ferrite are uniformly dispersed and the grains are refined when the steel is annealed for 60 s. When incubated for 90 s, the microstructure was dominated by martensite with a very low ferrite content. Annealed at 800 ℃ for 60 s, the highest elongation of steel, the lowest yield ratio, with good mechanical properties. Therefore, taking into account the actual production efficiency and stamping needs, and ultimately determine the holding time of 60 s.