金属热处理 ›› 2024, Vol. 49 ›› Issue (7): 208-211.DOI: 10.13251/j.issn.0254-6051.2024.07.032

• 表面工程 • 上一篇    下一篇

20MnCr5钢内星轮的渗碳淬火工艺优化

丁忠, 孟祥刚, 李晓天, 顾嘉诚, 徐杰   

  1. 上海纳铁福传动系统有限公司, 上海 201315
  • 收稿日期:2024-02-06 修回日期:2024-05-09 出版日期:2024-07-25 发布日期:2024-08-29
  • 作者简介:丁 忠(1983—),男,工程师,硕士,主要研究方向为汽车零部件材料开发及热处理,E-mail:dingzhong@sds.com.cn

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

Ding Zhong, Meng Xianggang, Li Xiaotian, Gu Jiacheng, Xu Jie   

  1. Shanghai GKN Drive Shaft Co., Ltd., Shanghai 201315, China
  • Received:2024-02-06 Revised:2024-05-09 Online:2024-07-25 Published:2024-08-29

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。

关键词: 内星轮, 渗碳淬火工艺, 硬度, 耐磨性

Abstract: 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.

Key words: inner star wheel, carburizing and quenching process, hardness, wear resistance

中图分类号: