Nb对60Si2CrVAT弹簧钢力学性能的影响  

Effect of Nb on mechanical properties of 60Si2CrVAT spring steel

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

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]生态与循环冶金教育部重点实验室,北京100083 [3]北京科技大学材料科学与工程学院,北京100083

出　　处：《金属热处理》2011年第5期29-33,共5页Heat Treatment of Metals

基　　金：国家自然科学基金(No.50874007);北京市教育委员会共建项目

摘　　要：通过对加入不同Nb含量的60Si2CrVAT弹簧钢进行了正交热处理试验,测得了经不同热处理后试验钢的力学性能。从力学性能分析得出60Si2CrVAT弹簧钢最佳的热处理工艺为:(900℃×35 min)油淬+(400℃×60 min)回火,水冷。结合Nb和V的固溶规律、晶粒度和夹杂物的比较分析,讨论了Nb含量对试验钢力学性能的影响。结果表明,添加0.028%的Nb既可以满足力学性能要求又能降低成本。The orthogonal experiments of heat treatment were carried on 60Si2CrVAT spring steels with different Nb content and the mechanical properties were measured.Based on mechanical property analysis,the preferable heat treatment process were determined,which is austenized at 900℃ for 35 min with oil cooling and tempered at 400℃ for 60 min with water cooling.The influence of Nb content on the mechanical properties of the 60Si2CrVAT spring steel was investigated through analysis and comparison of the solid solubility of Nb and V in austenite,forged grain sizes and inclusions of the tested steels with different Nb content.The results show that the addition of 0.028% Nb in this steel can meet the mechanical property requirements and cost saving.

关 键 词：60Si2CrVAT弹簧钢 NB 热处理 力学性能 

分 类 号：TG142.41[一般工业技术—材料科学与工程]