提速列车用弹簧钢60Si2CrVAT的热处理工艺优化  

Optimization of heat treatment process of 60Si2CrVAT spring steel for high-speed trains

作　　者：吴华林[1,2] 王福明[1,2] 李长荣[3] 程慧静[1,3] 

机构地区：[1]北京科技大学高效钢铁冶金国家重点实验室,北京100083 [2]北京科技大学冶金与生态工程学院,北京100083 [3]北京科技大学材料科学与工程学院,北京100083

出　　处：《材料热处理学报》2011年第9期35-41,共7页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(50874007);北京市教育委员会共建项目

摘　　要：分析制定了60Si2CrVAT弹簧钢合理的热处理制度,利用正交实验极差分析的方法并结合金相及回火后析出相的分析,研究了热处理工艺参数对60Si2CrVAT弹簧钢力学性能的影响,确定了其最佳热处理工艺。结果表明,回火温度和回火时间对强度的影响较大,回火温度和淬火保温时间对塑性影响较大,60Si2CrVAT弹簧钢最佳热处理工艺为:(900℃+25 min)油淬+(400℃+40 min)回火,水冷。Heat treatment processes with different processing parameters for 60Si2CrVAT spring steel were designed based on metallurgical principle,and the influence of heat treatment parameters on microstructure and mechanical properties of 60Si2CrVAT spring steel was studied by means of optical microscopy,orthogonal experiments and tensile tests.The heat treatment process was optimized based on the investigation.The results show the relatively significant effect of tempering temperature and tempering time on strength is observed,while tempering temperature and holding time exhibits larger effect on plasticity.The optimum heat treatment process is quenching at 900 ℃ for 25 min in oil and tempering at 400 ℃ for 40 min and then cooling in water for 60Si2CrVAT spring steel.

关 键 词：60Si2CrVAT弹簧钢 正交实验 热处理工艺 

分 类 号：TG142.41[一般工业技术—材料科学与工程]