金属热处理 ›› 2021, Vol. 46 ›› Issue (2): 182-184.DOI: 10.13251/j.issn.0254-6051.2021.02.033

• 工艺研究 • 上一篇    下一篇

渗氮温度对42CrMo钢零件表面后氧化渗层的影响

孟璇, 岳佳宏, 孔令飞, 杨阳, 贾鹏   

  1. 山西航天清华装备有限责任公司, 山西 长治 046012
  • 收稿日期:2020-07-19 出版日期:2021-02-25 发布日期:2021-05-08
  • 作者简介:孟璇(1990—),女,工程师,硕士,主要研究方向为各种材质零件的热处理工艺,E-mail:346311233@qq.com

Effect of nitriding temperature on post-oxidating infiltrated layer of 42CrMo steel part surface

Meng Xuan, Yue Jiahong, Kong Lingfei, Yang Yang, Jia Peng   

  1. Shanxi Aerospace Qinghua Equipment Co., Ltd., Changzhi Shanxi 046012, China
  • Received:2020-07-19 Online:2021-02-25 Published:2021-05-08

摘要: 采用硬度测试、显微组织观察、脆性等级和疏松等级评价等方法研究了渗氮温度对42CrMo钢零件渗氮后氧化渗层性能的影响。结果表明:在渗氮后氧化处理过程中,渗层的表面硬度随着渗氮温度的升高出现先增后降的趋势;渗层深度和疏松等级随渗氮温度的升高而增加,但脆性等级变化不大。当渗氮温度为560 ℃时,42CrMo钢零件可获得表面硬度≥600 HV、渗层(白亮层)深度≥15 μm、1级脆性等级、2级疏松等级的优秀渗层。

关键词: 42CrMo钢, 渗氮后氧化, 表面硬度, 渗层深度, 脆性等级, 疏松等级

Abstract: Effect of nitriding temperature on properties of the infiltrated layer of 42CrMo steel parts treated by the process of nitriding with post-oxidating was studied by means of hardness test, microstructure observation, and evaluation of brittleness grade and porosity grade. The results show that the thickness and porosity grade of the infiltrated layer increase with the increase of nitriding temperature, but the brittleness grade changes little. The surface hardness of the infiltrated layer increases first and then decreases with the increase of nitriding temperature. When the nitriding temperature is 560 ℃, the 42CrMo steel parts can obtain infiltrated layer with excellent properties, of which the surface hardness and the thickness of infiltrated layer is ≥600 HV and ≥15 μm respectively, the brittleness and the porosity of infiltrated layer is grade 1 and grade 2, respectively.

Key words: 42CrMo steel, nitriding with post-oxidating, surface hardness, infiltrated layer thickness, brittleness grade, porosity grade

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