摘要
强风、沙尘暴等耦合的极端气象环境,对输电线路金具的耐磨性能提出了更高要求,本研究将配分热处理工艺应用到硅锰合金钢上,以提高其耐磨性能。使用JMatPro软件模拟了硅锰合金钢的平衡相组成及力学性能,分析了硅锰合金钢在不同奥氏体化温度下的CCT曲线以及不同冷却速率下的物相组成。根据CCT曲线确定了硅锰合金钢配分热处理工艺,并进行了配分热处理试验。结果表明:硅锰合金钢的平衡物相主要为铁素体、渗碳体以及部分碳化物和硼化物,奥氏体化温度区间为780~1340℃。随着奥氏体化温度的升高,铁素体转变区域逐渐减小直至消失,贝氏体转变区域基本不变;当试样的冷却速率大于1℃/s时,试样的组织基本相同并且力学性能没有明显变化。配分热处理试验后,硅锰合金钢在室温下的组织主要是由马氏体和残余奥氏体组成,马氏体主要是板条马氏体和块状马氏体,残余奥氏体主要呈薄膜状和团簇状,此时硅锰钢具有良好的力学性能和耐磨性能。
The extreme meteorological environment coupled with strong winds and sandstorms has put forward higher requirements for the wear resistance of transmission line fittings.The partitioning heat treatment process was applied to Si-Mn alloy steel to improve its wear resistance.The equilibrium phase composition and mechanical properties of the Si-Mn alloy steel were simulated by JMatPro software.The CCT curves of Si-Mn alloy steel at different austenitizing temperatures and the phase structure at different cooling rates were analyzed.The heat treatment process of Si-Mn alloy steel was determined according to the CCT curve,and the partitioning treatment test was carried out.The results show that the equilibrium phases of Si-Mn alloy steel are mainly ferrite,cementite,some carbides and borides.The austenitizing temperature range of Si-Mn alloy steel is 780℃-1340℃.With the increase of austenitizing temperature,the ferritic transformation zone of the alloy steel gradually decreases and disappears,while the bainite transformation zone is basically unchanged.When the cooling rate of the sample is bigger than 1℃/s,the microstructure of the sample is basically the same and the mechanical properties have no obvious change.After partitioning heat treatment test,the microstructure of Si-Mn alloy steel is mainly composed of martensite and residual austenite at room temperature,the martensite is mainly lath martensite and massive martensite,the residual austenite is mainly in thin film and cluster forms.The Si-Mn steel has good mechanical properties and wear resistance.
作者
顾建
刘胜春
司佳钧
王欣欣
GU Jian;LIU Shengchun;SI Jiajun;WANG Xinxin(China Electric Power Research Institute,Beijing 102401,China;Electric Powder Research Institute of State Grid Xinjiang Electric Power Company Limited,Urumqi 830000,China)
出处
《热加工工艺》
北大核心
2025年第17期102-107,共6页
Hot Working Technology
基金
国家电网公司总部管理科技项目(5108-202218280A-2-123-XG)。
关键词
硅锰合金钢
配分热处理
CCT曲线
耐磨性能
Si-Mn alloy steel
partitioning heat treatment
CCT curve
wear resistance
