Prediction and Minimization of the Heat Treatment Induced Distortion in 8620H Steel Gear:Simulation and Experimental Verification

作     者：Wen Shao Mohan Yi Jinyuan Tang Siyuan Sun Wen Shao;Mohan Yi;Jinyuan Tang;Siyuan Sun

作者机构：State Key Laboratory of High Performance Complex ManufacturingCollege of Mechanical and Electrical EngineeringCentral South UniversityChangsha 410083China 

出 版 物：《Chinese Journal of Mechanical Engineering》 (中国机械工程学报（英文版）)

年 卷 期：2022年第35卷第6期

页      面：207-218页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

基　　金：National Key R&D Program of China(Grant No.2019YFB2004700) State Key Laboratory of High Performance Complex Manufacturing of China(Grant No.ZZYJKT2019-08) China Postdoctoral International Exchange Program(Grant No.140050004) 

主　　题：Distortion Carburizing-quenching Numerical simulation Heat treatment 8620H steel gear 

摘      要：The considerable heat treatment induced runout value in the end face of the automobile main reducer gear is always dimensionally out of *** directly affects the dimensional accuracy,the grade of carburized and hardened gears,and the post-quenching manufacturing *** this study,three dimensional numerical models were developed to simulate the carburizing-quenching process of gear based on the multi-field coupling theory using DEFORM *** results indicated that the ununiform cooling rate of the gear caused by the asymmetry of the web structure would result in the ununiform distribution of martensite,leading to the large runout value at the end face of the ***,a novel method was proposed to minimize the heat treatment induced runout *** was found that the heat treatment induced runout value could be effectively controlled by the addition of a compensation ring and the support of a rod *** experiments showed that the average runout value of the gear end face before and after the proposed heat treatment method were about 0.023 mm and 0.059 mm respectively,which was in good agreement with the simulated *** novel approach proposed in this study led to a reduction of the gear runout value by 70.0%‒76.9%compared to that of the original heat treatment process,which may serve as a practical and economical way to predict and minimize the heat treatment induced distortion in drive gear.