12Cr2Ni4A钢高温真空低压脉冲渗碳工艺

doi:10.12068/j.issn.1005-3026.2020.09.006

东北大学学报:自然科学版 ›› 2020, Vol. 41 ›› Issue (9): 1251-1256.DOI: 10.12068/j.issn.1005-3026.2020.09.006

12Cr2Ni4A钢高温真空低压脉冲渗碳工艺

田勇，安小雪，王昭东，王国栋

(东北大学轧制技术及连轧自动化国家重点实验室，辽宁沈阳110819)

收稿日期:2020-02-20 修回日期:2020-02-20 出版日期:2020-09-15 发布日期:2020-09-15
通讯作者: 田勇
作者简介:田勇(1981-)，男，河南许昌人，东北大学副教授；王昭东(1968-)，男，安徽淮南人，东北大学教授，博士生导师；王国栋(1942-)，男，辽宁大连人，东北大学教授，博士生导师，中国工程院院士.
基金资助:
国家重点研发计划项目(20l7YFB0305301)；中央高校基本科研业务费专项资金资助项目(N170712017).

High Temperature Vacuum Low-Pressure Pulse Carburizing Process of 12Cr2Ni4A Steel

TIAN Yong， AN Xiao-xue， WANG Zhao-dong， WANG Guo-dong

State Key Laboratory of Rolling and Automation， Northeastern University， Shenyang 110819， China.

Received:2020-02-20 Revised:2020-02-20 Online:2020-09-15 Published:2020-09-15
Contact: AN Xiao-xue
About author:-
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摘要/Abstract

摘要： 与传统气氛渗碳相比，高温真空渗碳在提高渗碳效率、产品质量和节约能源方面均表现出明显优势.本文分析了12Cr2Ni4A钢的奥氏体晶粒长大行为、扩散系数及奥氏体饱和碳质量分数等关键参数的影响，结合真空低压脉冲渗碳工艺原理，对高温真空低压脉冲渗碳工艺进行实验验证.结果表明:实验钢在930，950，980℃渗碳温度下，渗碳层的硬度梯度曲线和碳质量分数梯度曲线的实测值与预期值吻合较好.此外，随着渗碳温度的升高，碳的扩散系数和奥氏体饱和碳质量分数增加，高温真空渗碳可显著提高渗碳速率，温度每提高10℃约使渗碳效率提高14%~17%.

关键词: 12Cr2Ni4A钢, 真空低压脉冲渗碳, 高温渗碳, 渗层深度, 碳质量分数

Abstract: Compared with traditional atmosphere carburizing， the high temperature vacuum carburizing has great advantages in improving carburizing efficiency， product quality and saving energy. The critical parameters of austenite grain growth behavior， diffusion coefficient， and saturation carbon concentration of austenite in 12Cr2Ni4A steel were investigated in this work. Combined with the principle of vacuum low-pressure pulse carburization， the high temperature vacuum low-pressure pulse carburizing process was verified experimentally and the parameters of carburized layer depth and surface carbon concentration were further specified. The results show that under carburizing temperatures of 930， 950 and 980℃， the measured values from the hardness gradient curve and carbon concentration gradient curve of the carburized layer are in good agreement with the expected ones. In additional， the carbon diffusion coefficient and austenite saturation carbon concentration increases with the carburizing temperature， and the carburizing efficiency is increased by 14%~17% when the temperature is increased by every 10℃.

Key words: 12Cr2Ni4A steel, vacuum low-pressure pulse carburizing, high-temperature carburizing, carburized layer depth, carbon concentration

中图分类号:

TG156.8+1

田勇，安小雪，王昭东，王国栋. 12Cr2Ni4A钢高温真空低压脉冲渗碳工艺[J]. 东北大学学报:自然科学版, 2020, 41(9): 1251-1256.

TIAN Yong， AN Xiao-xue， WANG Zhao-dong， WANG Guo-dong. High Temperature Vacuum Low-Pressure Pulse Carburizing Process of 12Cr2Ni4A Steel[J]. Journal of Northeastern University Natural Science, 2020, 41(9): 1251-1256.

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12Cr2Ni4A钢高温真空低压脉冲渗碳工艺

High Temperature Vacuum Low-Pressure Pulse Carburizing Process of 12Cr2Ni4A Steel

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