45钢“零保温”淬火工艺的可行性研究  

Study on the feasibility of 45 steel "zero time holding" quenching technology

作　　者：李安铭[1] 呼梦娟[1] 

机构地区：[1]河南理工大学材料科学与工程学院,河南焦作454000

出　　处：《河南理工大学学报（自然科学版）》2010年第1期70-74,共5页Journal of Henan Polytechnic University（Natural Science）

基　　金：河南省自然科学基金资助项目(0511052600)

摘　　要：根据传热方程计算了45钢工件的透热时间,探讨了"零保温"淬火温度对钢的力学性能的影响.直径不大于70 mm的45钢工件,表面与心部达到840℃的时间相近;在780～900℃范围内随着淬火温度的升高,45钢的强度、硬度升高,经900℃"零保温"淬火后具有较高的强度和硬度;该钢"零保温"淬火后获得细小的板条状马氏体组织,其原因与奥氏体晶粒细化和奥氏体中碳分布不均匀有关.理论分析和实验结果表明45钢"零保温"淬火工艺是可行性的.The thoroughly heating time of 45 steel works was calculated by conduct heat equation.The effect of ＂zero time holding＂quenching temperature on 45 steel＇s mechanic properties was studied.The results show that the heating time of the works,surface and center arrived 840℃ is close when the diameter within 70mm.In the range of 780℃～900℃,the strength and hardness of the 45 steel raise along with the quenching temperature going up.The high strength and hardness can be obtained at 900℃ with the＂zero time holding＂ quenched.The steel＇s microstructures are fine and short lath Martensite after the＂zero time holding＂ quenched,this reasons are the fined Austenite crystalline grain and the non-uniform density of carbon in Austenite.The theoretical analysis and experiment results indicate that the＂zero time holding＂quenching technology of 45 Steel is feasible.

关 键 词：45钢 “零保温”淬火 抗拉强度 硬度 

分 类 号：TG156.6[金属学及工艺—热处理]