摘要
通过在线淬火及不同温度回火的热模拟试验,观察了600 MPa级高强钢回火后的显微结构,分析了回火过程碳氮化物粒子的析出规律。结果表明,回火温度对钢板显微结构有较大影响,随回火温度的升高,贝氏体数量逐渐减少,多边形铁素体含量增多,平均晶粒尺寸逐渐增大;钢中第二相粒子析出量增多,析出物形貌由方形逐渐转变为圆形。结合实物第二相分析及性能,回火温度以620℃为宜。
By thermal simulation test of on-line quenching and tempering at different temperatures,the microstructures of high strength steel with 600 MPa after tempering were observed and the precipitation rule of carbonitride particles in tempering process was analyzed.The results showed that the tempering temperature has great influence on the microstructure of steel plate.With the increasing of tempering temperature,the number of bainite is decreased,the polygonal ferrite content is increased and the average grain size is increased,the precipitation amount of the second phase particles in steel is increased,and the morphology of precipitates gradually is changed from square to round.Combined the physical phase analysis with the properties of product object,the tempering temperature is suitable at 620℃.
作者
侯东华
HOU Donghua(Shandong Iron and Steel Group Rizhao Co.,Ltd.,Rizhao 276800,China)
出处
《山东冶金》
CAS
2018年第4期27-29,共3页
Shandong Metallurgy
