气体氮碳共渗白层疏松的控制

doi:10.13251/j.issn.0254-6051.2023.11.028

金属热处理 ›› 2023, Vol. 48 ›› Issue (11): 180-184.DOI: 10.13251/j.issn.0254-6051.2023.11.028

气体氮碳共渗白层疏松的控制

王建新, 吴锴

武汉市华敏智造科技有限责任公司, 湖北武汉 430074

收稿日期:2023-05-26 修回日期:2023-09-07 出版日期:2023-11-25 发布日期:2023-12-27
作者简介:王建新(1990—),男,工程师,主要研究方向为热处理控制系统开发和化学热处理工艺,E-mail:jxwangedu@163.com

Control of white layer porosity in gas nitrocarburizing

Wang Jianxin, Wu Kai

Wuhan Huamin Intelligent Manufacturing Technology Co., Ltd., Wuhan Hubei 430074, China

Received:2023-05-26 Revised:2023-09-07 Online:2023-11-25 Published:2023-12-27

摘要/Abstract

摘要： 氮碳共渗白层的疏松是影响其性能的重要因素之一,氮化物的分解以及氮原子重组为氮气分子为白层疏松形成的最重要机制。疏松的形成与材料种类、氮碳共渗工艺时间、工艺温度以及白层中氮碳浓度有关,白层中氮碳浓度又直接和气氛的氮势K_N值和碳势K_C值有关。一个典型氮碳共渗工艺中白层疏松的控制是对升温阶段、保温阶段和降温阶段整个工艺阶段的控制。

关键词: 氮碳共渗, 重组, K_N, K_C, 疏松

Abstract: Porosity in white layer is an important factor which affects its performance during gas nitrocarburizing, and the most important mechanism of porosity formation is the decomposition of nitrides and the recombination of atomic nitrogen to molecular nitrogen. The formation of porosity is related to the material, gas nitrocarburizing time and temperature, and the concentrations of nitrogen and carbon in the white layer which are directly related to the nitrogen potential K_N and carbon potential K_C values of the atmosphere. In a typical nitrocarburizing process, the control of white layer porosity is throughout the process, including all the heating, holding and cooling stages.

Key words: nitrocarburizing, recombination, K_N, K_C, porosity

中图分类号:

TG156.8⁺2

王建新, 吴锴. 气体氮碳共渗白层疏松的控制[J]. 金属热处理, 2023, 48(11): 180-184.

Wang Jianxin, Wu Kai. Control of white layer porosity in gas nitrocarburizing[J]. Heat Treatment of Metals, 2023, 48(11): 180-184.

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气体氮碳共渗白层疏松的控制

Control of white layer porosity in gas nitrocarburizing

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