20MnCr5钢内星轮的渗碳淬火工艺优化  

Optimization of carburizing and quenching process for 20MnCr5 steel inner star wheel

作　　者：丁忠 孟祥刚 李晓天 顾嘉诚 徐杰 Ding Zhong;Meng Xianggang;Li Xiaotian;Gu Jiacheng;Xu Jie(Shanghai GKN Drive Shaft Co.,Ltd.,Shanghai 201315,China)

机构地区：[1]上海纳铁福传动系统有限公司,上海201315

出　　处：《金属热处理》2024年第7期208-211,共4页Heat Treatment of Metals

摘　　要：为提高内星轮的表面硬度、耐磨性且确保心部韧性,对20MnCr5钢内星轮的渗碳淬火工艺进行了优化。结果表明,在扩散碳势0.75%和淬火碳势0.65%、油冷搅拌速度1100 r/min条件下经(935±10)℃×295 min+830℃×30 min渗碳淬火后,20MnCr5钢内星轮的硬度和有效硬化层深度均符合技术要求。经400次循环寿命试验,原渗碳淬火工艺处理内星轮表面可见磨损和剥落,经优化后的渗碳淬火工艺处理的内星轮表面仅出现轻微擦痕,耐磨性较工艺优化前明显提高。In order to improve the surface hardness and wear resistance of inner star wheel and ensure the toughness of the core,the carburizing and quenching process of 20MnCr5 steel inner star wheel was optimized.The results show that the hardness and the depth of effective hardening layer of the 20MnCr5 steel inner star wheel meet the technical requirements after(935±10)℃×295 min+830℃×30 min carburizing and quenching with diffusion carbon potential of 0.75%,quenching carbon potential of 0.65%,and the oil cooling stirring speed of 1100 r/min.After 400 cycles life test,wear and peeling appear on the surface of the inner star wheel treated by the original carburizing and quenching,while only slight scratches appear on the surface of the inner star wheel treated by optimized carburizing and quenching.The wear resistance is significantly improved compared to the original carburizing and quenching.

关 键 词：内星轮 渗碳淬火工艺 硬度 耐磨性 

分 类 号：TG156.81[金属学及工艺—热处理]