Cu-NiAl纳米复合析出强化钢回火工艺  

Tempering process of Cu-NiAl nano co-precipitation strengthened steel

作　　者：阚立烨 叶其斌[1] 田勇[1] 王昭东[1] 王国栋[1] KAN Li-ye;YE Qi-bin;TIAN Yong;WANG Zhao-dong;WANG Guo-dong(The State Key Laboratory of Rolling Automation,Northeastern University,Shenyang 110819,Liaoning,China)

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110819

出　　处：《钢铁》2021年第2期105-109,共5页Iron and Steel

基　　金：中央高校基本科研业务费专项资金资助项目(N160712001);国家重点研发计划资助项目(2016YFB0300300);装备预研教育部联合基金资助项目(6141A020222);装备预研一般领域基金资助项目(61409220121)。

摘　　要：为了研究不同回火工艺下Cu-NiAl纳米复合析出强化钢的组织和力学性能,采用OM、TEM对在300~650℃范围内回火后的试验钢组织进行分析并对其力学性能进行讨论。结果表明,在300~550℃回火时,贝氏体铁素体板条逐渐粗化为等轴铁素体,并且在基体上形成纳米级析出相;在600~650℃回火时,基体完全转变为等轴铁素体,纳米级析出相逐渐粗化。采用回火工艺制备Cu-NiAl纳米复合析出强化钢的最佳回火温度区间为550~600℃,此时屈服强度为855~917MPa,-40℃冲击功为77~86J,具有较好的综合力学性能。In order to study the microstructure and mechanical properties of Cu-NiAl nano co-precipitation strengthened steel tempered at different processes,OM and TEM were used to analyze the microstructure of the experimental steel tempered in the range of 300-650℃,and the mechanical properties were discussed.The results show that bainitic ferrite lathes began to coarsen and gradually transformed into equiaxial ferrite,and there were nanoscale precipitates in the matrix at tempering temperature 300-550℃.During tempering at 600-650℃,lath structure completely transformed to equiaxial ferrite,and nanometer precipitates gradually grew and coarsened.The optimum tempering temperature range for the Cu-NiAl nano co-precipitation strengthening steels was 550-600℃.The yield strength was 855-917 MPa,the impact energy tested at-40 ℃ is 77-86 J,and the comprehensive mechanical properties were good.

关 键 词：Cu-NiAl纳米复合析出 回火温度 超高强钢 板条贝氏体再结晶 冲击性能 

分 类 号：TG161[金属学及工艺—热处理]