BH复合催渗程控系统的构建及数值模拟

doi:10.13251/j.issn.0254-6051.2021.07.041

金属热处理 ›› 2021, Vol. 46 ›› Issue (7): 212-217.DOI: 10.13251/j.issn.0254-6051.2021.07.041

BH复合催渗程控系统的构建及数值模拟

易华清¹, 刘克², 苏震³, 杨兵², 舒兵², 罗子相¹

1.湘潭大学材料科学与工程学院, 湖南湘潭 411105;
2.江麓机电集团有限公司, 湖南湘潭 411100;
3.中国兵器工业新技术推广研究所, 北京 100089

收稿日期:2020-10-20 出版日期:2021-07-25 发布日期:2021-12-10
通讯作者: 刘克(1982—),男,正高级工程师,主要研究方向为防务装备热处理工艺技术,E-mail:149008871@qq.com
作者简介:易华清(1993—),男,硕士,主要研究方向为相平衡及合金设计,E-mail:1170069770@qq.com。

Construction and numerical simulation of BH compound carburizing control system

Yi Huaqing¹, Liu Ke², Su Zhen³, Yang Bing², Shu Bing², Luo Zixiang¹

1. School of Materials Science and Engineering , Xiangtan University, Xiangtan Hunan 411105, China;
2. Jianglu Machinery & Electronics Group Co., Ltd., Xiangtan Hunan 411100, China;
3. Advanced Technology Generalization Institute of CNGC, Beijing 100089, China

Received:2020-10-20 Online:2021-07-25 Published:2021-12-10

摘要/Abstract

摘要： 通过对可控气氛多用炉设备进行改造,将闲置不用的氨气管道改为BH催渗用滴注管道并设计了催渗剂滴注控制系统,实现了BH渗碳工艺的自动化控制。研究了20Cr2Ni4A钢930 ℃超级渗碳和BH渗碳两种工艺的渗碳动力学,并模拟了渗层深度与碳浓度分布曲线。结果表明: BH渗碳时碳扩散系数要大于超级渗碳,BH渗碳的扩散系数为2.084×10^-9 mm²·s^-1,超级渗碳为1.667×10^-9 mm²·s^-1。本文模拟的20Cr2Ni4A钢在930 ℃进行BH渗碳及超级渗碳时的碳浓度分布和渗层厚度变化与实际验证情况相符。实际渗碳后要达到相同渗层厚度,采用超级渗碳所需的时间要高于BH渗碳,BH渗碳的渗碳速率提高了22.6%。

关键词: 20Cr2Ni4A钢, BH渗碳, 数值模拟

Abstract: Through the reformation of the controllable atmosphere multi-purpose furnace by changing the unused ammonia gas pipeline to the BH carburizing pipeline and designing the control system of catalyst carburizing, the automatic control of the BH carburizing was realized. Then the 20Cr2Ni4A steel was subjected to super carburizing and BH carburizing at 930 ℃, and the carburizing kinetics of this two processes were studied and the distribution curves of carburized layer depth and carbon concentration were simulated. The results show that the carbon diffusion coefficient of BH carburizing is greater than that of super carburizing, and the diffusion coefficient of BH carburizing and super carburizing are 2.084×10^-9 mm²·s^-1 and 1.667×10^-9 mm²·s^-1, respectively. The simulation of carbon concentration distribution and the carburized layer depth of the 20Cr2Ni4A steel during BH carburizing and super carburizing at 930 ℃ are fitted with the actual experimental values. When actual carburizing to achieve the same thickness of carburizing layer, the time required for super carburizing time is higher than that of BH carburizing, and the carburizing rate of BH carburizing is increased by 22.6%.

Key words: 20Cr2Ni4A steel, BH carburizing, numerical simulation

中图分类号:

156.8⁺1

易华清, 刘克, 苏震, 杨兵, 舒兵, 罗子相. BH复合催渗程控系统的构建及数值模拟[J]. 金属热处理, 2021, 46(7): 212-217.

Yi Huaqing, Liu Ke, Su Zhen, Yang Bing, Shu Bing, Luo Zixiang. Construction and numerical simulation of BH compound carburizing control system[J]. Heat Treatment of Metals, 2021, 46(7): 212-217.

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BH复合催渗程控系统的构建及数值模拟

Construction and numerical simulation of BH compound carburizing control system

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