金属热处理 ›› 2024, Vol. 49 ›› Issue (11): 172-177.DOI: 10.13251/j.issn.0254-6051.2024.11.026

• 工艺研究 • 上一篇    下一篇

30CrMnSi钢的等温淬火工艺

付星, 郭兆东, 姚中涛, 宋骐羽, 徐微, 洪嘉琪, 陶宇航, 秦颖   

  1. 吉林江机特种工业有限公司, 吉林 吉林 132021
  • 收稿日期:2024-03-04 修回日期:2024-06-05 出版日期:2024-11-25 发布日期:2025-01-09
  • 通讯作者: 郭兆东,高级工程师,E-mail:1723010122@qq.com
  • 作者简介:付 星(1989—),女,工程师,硕士,主要研方向为理化分析、金相检测、材料检测、计量检测,E-mail:252375558@qq.com。

Austempering process of 30CrMnSi steel

Fu Xing, Guo Zhaodong, Yao Zhongtao, Song Qiyu, Xu Wei, Hong Jiaqi, Tao Yuhang, Qin Ying   

  1. Jilin Jiangji Special Industry Co., Ltd., Jilin Jilin 132021, China
  • Received:2024-03-04 Revised:2024-06-05 Online:2024-11-25 Published:2025-01-09

摘要: 采用金相显微镜和硬度计对30CrMnSi钢等温淬火处理后的显微组织及硬度进行了研究。结果表明,30CrMnSi钢热轧管经880 ℃保温30 min正火预处理替代传统退火处理后,适合切削加工;经工艺优化,最佳等温淬火工艺为890 ℃奥氏体化30 min,420~440 ℃等温1~1.5 h,经优化工艺处理后,可得到下贝氏体组织,硬度在37~39 HRC范围,满足产品设计要求。

关键词: 等温淬火, 30CrMnSi钢, 显微组织, 硬度

Abstract: Microstructure and hardness of 30CrMnSi steel after austempering treatment were studied by using metallurgical microscope and hardness tester. The results show that the hot-rolled tube of the 30CrMnSi steel is suitable for cutting processing after normalizing pretreating at 880 ℃ for 30 min instead of traditional annealing treatment. The optimal austempering process for the 30CrMnSi steel is optimized to be austenitizing at 890 ℃ for 30 min, followed by isothermal treating at 420-440 ℃ for 1-1.5 h. After treating by the optimal process, lower bainite can be obtained, with hardness ranging from 37 HRC to 39 HRC, meeting the design requirements of the product.

Key words: austempering, 30CrMnSi steel, microstructure, hardness

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