高频真空电磁感应脉冲渗碳装置及其应用

doi:10.13251/j.issn.0254-6051.2020.03.049

金属热处理 ›› 2020, Vol. 45 ›› Issue (3): 242-246.DOI: 10.13251/j.issn.0254-6051.2020.03.049

• 设备 • 上一篇

高频真空电磁感应脉冲渗碳装置及其应用

宋康杰¹, 赵驯峰¹, 冯治国¹, 刘静²

1. 贵州大学机械工程学院, 贵州贵阳 550025;
2. 贵州师范大学材料与建筑学院, 贵州贵阳 550025

收稿日期:2019-09-27 出版日期:2020-03-25 发布日期:2020-04-03
通讯作者: 冯治国,教授,博士,主要从事金属表面处理工艺装备及热处理模拟仿真研究,E-mail:492262997@qq.com
作者简介:宋康杰(1993—),男,硕士研究生,主要从事金属热处理、数值模拟研究,E-mail:1095343950@qq.com。
基金资助:
国家自然科学基金(51574096);贵州省优秀青年科技人才项目(黔科合平台人才[2017]1118,[2016]5607号)

High-frequency vacuum electromagnetic induction pulse carburizing and its application

Song Kangjie¹, Zhao Xunfeng¹, Feng Zhiguo¹, Liu Jing²

1. College of Mechanical Engineering, Guizhou University, Guiyang Guizhou 550025, China;
2. College of Materials and Architecture, Guizhou Normal University, Guiyang Guizhou 550025, China

Received:2019-09-27 Online:2020-03-25 Published:2020-04-03

摘要/Abstract

摘要：

针对常规真空电阻式加热渗碳装置加热速度慢、工艺周期长等问题,提出高频真空电磁感应脉冲渗碳方法,自主研制基于PLC控制的电磁感应真空脉冲渗碳装置。其具有升温快、工艺周期短、实现在线监测压力和温度;实现自动混合不同比例的渗碳气氛和整个电磁感应真空脉冲渗碳过程自动化等优势。可完成不同“强渗-扩散”时间占比以及压强、温度随时间在-80~0 kPa、300~1300 ℃范围内变化的脉冲渗碳工艺。通过使用该装置对20CrMnTi钢进行8个不同“强渗-扩散”时间占比的脉冲渗碳工艺,制备材料表面含有Fe₃C、Fe等碳化物相的渗碳层,碳化物层的硬度达到835.2 HV0.025,渗碳层深度达到1398 μm,优于常规真空电阻渗碳方法。

关键词: 真空渗碳, 电磁感应, 脉冲, 自动化控制

Abstract:

Aiming at the problems of slow heating rate and long process period of the conventional vacuum resistance heating carburizing equipment, a high-frequency electromagnetic induction vacuum pulse carburizing method was proposed, and an electromagnetic induction vacuum pulse carburizing equipment based on PLC control was independently developed. It has a fast heating rate, short process cycle, online monitoring of pressure and temperature, automatic mixing of different proportions of carburizing atmosphere and program control of the entire process of electromagnetic induction vacuum pulse carburizing. It can complete different “strong seepage-diffusion” time ratios and can change pressure and temperature respectively with time in the range of -80-0 kPa and 300-1300 ℃. By using the equipment, a pulse carburizing process with 8 different “strong seepage-diffusion” time ratios was carried out on 20CrMnTi steel, and a carburized layer containing Fe₃C, Fe and other carbide phases was prepared on the surface of the steel, the highest hardness and the thickness of the carbonized layer reach 835.2 HV0.025 and 1398 μm respectively, which are superior to that obtained by the conventional vacuum resistance carburizing method.

Key words: vacuum carburizing, electromagnetic induction, pulse, automated control

中图分类号:

TG155.92

宋康杰, 赵驯峰, 冯治国, 刘静. 高频真空电磁感应脉冲渗碳装置及其应用[J]. 金属热处理, 2020, 45(3): 242-246.

Song Kangjie, Zhao Xunfeng, Feng Zhiguo, Liu Jing. High-frequency vacuum electromagnetic induction pulse carburizing and its application[J]. HTM, 2020, 45(3): 242-246.

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高频真空电磁感应脉冲渗碳装置及其应用

High-frequency vacuum electromagnetic induction pulse carburizing and its application

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