奥氏体不锈钢氮钛离子共渗工艺

doi:10.13251/j.issn.0254-6051.2023.09.020

金属热处理 ›› 2023, Vol. 48 ›› Issue (9): 116-121.DOI: 10.13251/j.issn.0254-6051.2023.09.020

奥氏体不锈钢氮钛离子共渗工艺

魏咏梅¹, 李双喜², 汪美桃³, 赵玉霞², 高洁², 陈琳²

1.河南技师学院, 河南郑州 450007;
2.河南机电职业学院, 河南郑州 451191;
3.江苏省徐州技师学院, 江苏徐州 221000

收稿日期:2023-04-20 修回日期:2023-06-28 出版日期:2023-09-25 发布日期:2023-10-25
通讯作者: 李双喜,高级工程师,博士,E-mail: 15890605077@163.com
作者简介:魏咏梅(1967—),女,高级实习指导教师,主要研究方向为机械工程材料,E-mail:2841033155@qq.com。
基金资助:
河南省科技攻关(222102220029)

Nitrogen titanium ion co-infiltration process for austenitic stainless steel

Wei Yongmei¹, Li Shuangxi², Wang Meitao³, Zhao Yuxia², Gao Jie², Chen Lin²

1. Henan Technician Institute, Zhengzhou Henan 450007, China;
2. Mechanical and Electrical Vocational College, Zhengzhou Henan 451191, China;
3. Xuzhou Technician College of Jiangsu Province, Xuzhou Jiangsu 221000, China

Received:2023-04-20 Revised:2023-06-28 Online:2023-09-25 Published:2023-10-25

摘要/Abstract

摘要： 为了探究Ti离子对奥氏体不锈钢离子渗氮催渗效果,在不改变其他渗氮条件下,对奥氏体不锈钢有无海绵钛的离子渗氮结果进行对比试验。采用显微硬度计、光学显微镜(OM)、扫描电镜(SEM)和能谱仪(EDS)等对两种试验条件下022Cr17Ni12Mo2不锈钢试样的渗层深度、表面硬度、渗层显微组织、主要合金元素在渗层中分布等进行研究,检验钛对022Cr17Ni12Mo2不锈钢的催渗效果和探究钛的催渗机理。结果表明,022Cr17Ni12Mo2不锈钢在560 ℃×9 h的离子渗氮工艺下,加入海绵钛,得到220~240 μm渗层和1087~1122 HV0.3表面硬度;相比于同离子渗氮工艺无海绵钛催渗的试样,渗层深度增加了78%左右,表面硬度无明显变化,从而使得渗层硬度梯度大幅度降低。研究认为022Cr17Ni12Mo2不锈钢试样加钛催渗机理为:海绵钛为炉内提供了超强氮化物形成元素Ti离子,强化了氮化物形成过程中的沉积作用,从而有效地提高了渗氮效率。

关键词: 离子渗氮, 钛, 催渗, 奥氏体不锈钢

Abstract: In order to investigate the effect of Ti ions on the ion nitriding of austenitic stainless steel, a comparative experiment was conducted on the ion nitriding results of the austenitic stainless steel with or without sponge titanium under the same nitriding conditions. The infiltration depth, surface hardness, microstructure, and distribution of main alloying elements in the infiltration layer of the 022Cr17Ni12Mo2 stainless steel specimens under two experimental conditions were studied by means of microhardness testers, optical microscopes (OM), scanning electron microscope (SEM) and energy dispersive spectroscope (EDS). The infiltration effect of titanium on the 022Cr17Ni12Mo2 stainless steel and the infiltration mechanism of titanium were investigated. The results show that the 022Cr17Ni12Mo2 stainless steel achieves 220-240 μm infiltration layer and 1087-1122 HV0.3 surface hardness after ion nitriding at 560 ℃ for 9 h with sponge titanium added. The infiltration layer increases by about 78% compared to that of the specimen of the same ion nitriding process without titanium, while the surface hardness has no obvious change, which greatly reduces the hardness gradient of the infiltration layer. It is concluded that the energizing mechanism of the 022Cr17Ni12Mo2 stainless steel specimen with titanium is as follows: Sponge titanium provides the super strong nitride forming element Ti ion in the furnace, which strengthens the deposition in the formation process of nitride, thus effectively improves the nitriding efficiency.

Key words: ion nitriding, titanium, catalyzing, austenitic stainless steel

中图分类号:

TG156.8

魏咏梅, 李双喜, 汪美桃, 赵玉霞, 高洁, 陈琳. 奥氏体不锈钢氮钛离子共渗工艺[J]. 金属热处理, 2023, 48(9): 116-121.

Wei Yongmei, Li Shuangxi, Wang Meitao, Zhao Yuxia, Gao Jie, Chen Lin. Nitrogen titanium ion co-infiltration process for austenitic stainless steel[J]. Heat Treatment of Metals, 2023, 48(9): 116-121.

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奥氏体不锈钢氮钛离子共渗工艺

Nitrogen titanium ion co-infiltration process for austenitic stainless steel

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