金属热处理 ›› 2023, Vol. 48 ›› Issue (5): 275-278.DOI: 10.13251/j.issn.0254-6051.2023.05.043

• 工艺研究 • 上一篇    下一篇

矿用接链环的喷丸强化处理

卢俊玲1, 张建斌2, 陈飞飞2   

  1. 1.宁夏天地奔牛实业集团有限公司, 宁夏 石嘴山 753001;
    2.兰州理工大学 省部共建有色金属先进加工与再利用国家重点实验室, 甘肃 兰州 730050
  • 收稿日期:2022-12-22 修回日期:2023-03-23 出版日期:2023-05-25 发布日期:2023-06-21
  • 作者简介:卢俊玲(1976—),女,高级工程师,主要研究方向为热处理技术研发与制造,E-mail: lujunling090@126.com
  • 基金资助:
    宁夏天地奔牛实业集团有限公司2021课题-7

Shot peening treatment of chains for mining

Lu Junling1, Zhang Jianbin2, Chen Feifei2   

  1. 1. Ningxia Tiandi Benniu Industrial Group Co., Ltd., Shizuishan Ningxia 753001, China;
    2. State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou Gansu 730050, China
  • Received:2022-12-22 Revised:2023-03-23 Online:2023-05-25 Published:2023-06-21

摘要: 为了提高矿用接链环的疲劳寿命,对23MnNiCrMo53K钢制接链环进行喷丸处理,并研究喷丸处理对试验钢组织和抗疲劳性能的影响。结果表明,喷丸处理前,接链环组织以回火马氏体为主;喷丸后,表面组织细化,形成亚晶,距表面深度400 μm后,组织基本接近喷丸前组织。喷丸后,接链环表面显微硬度升高,随表面层深度的增加,显微硬度逐渐降低,接链环疲劳寿命明显增加。

关键词: 喷丸, 矿用接链环, 组织, 抗疲劳性能

Abstract: To improve the service life of the mining circular chain, shot peening was carried out on 23MnNiCrMo53K steel chain, and the effect of shot peening on microstructure and fatigue resistance was studied. The results show that the microstructure of the chains is mainly tempered martensite before shot peening, and after shot peening, the surface microstructure is refined to form sub crystals, with a depth of 400 μm from the surface, the microstructure is basically close to that before shot peening. After shot peening, the surface microhardness of the chains increases, and with the increase of the surface layer depth, the microhardness gradually decreases, and the fatigue life of the chains significantly increases.

Key words: shot peening, chains for mining, microstructure, fatigue resistance

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