表面微弧处理对QT600-3组织及性能的影响研究

赵帅

doi:10.16577/j.cnki.42-1215/tb.2021.02.020

材料保护 >

2021 , Vol. 54 >Issue 2: 113 - 117

DOI: https://doi.org/10.16577/j.cnki.42-1215/tb.2021.02.020

工艺探讨

表面微弧处理对QT600-3组织及性能的影响研究

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河南理工大学鹤壁工程技术学院

赵帅(1987-)，讲师，硕士，研究方向为金属材料表面处理，E-mail：zhaoshuai1101@163.com

收稿日期: 2020-09-20

网络出版日期: 2025-07-10

基金资助

河南省科技攻关研究项目(182102210086)资助

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Effects of Micro Arc Strengthening on Microstructure and Properties of QT600-3

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(Hebi Institute of Engineering and Technology, Henan Polytechnic University, Hebi 458030, China)

Received date: 2020-09-20

Online published: 2025-07-10

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摘要

球磨铸铁QT600-3可制作曲轴、凸轮轴、连杆轴、齿轮、液压缸等，不仅要求相应的硬度和强度，还需要良好的耐磨损、抗表面疲劳性能。对QT600-3表面进行微弧强化，通过正交试验结果表明：强化电流19 kA，工件转速0.7 r/min，接触压力600 N时，QT600-3表面形成了由均匀细小的马氏体、渗碳体和残余奥氏体组成的白亮层；该强化层硬度可达850 HV2 N；摩擦磨损试验证实该层提升了材料的耐磨损性能。

关键词： 微弧强化; QT600-3; 显微组织; 力学性能

本文引用格式

赵帅 . 表面微弧处理对QT600-3组织及性能的影响研究[J]. 材料保护, 2021 , 54(2) : 113 -117 . DOI: 10.16577/j.cnki.42-1215/tb.2021.02.020

Abstract

The cast iron QT600-3 can make crankshaft, camshaft, connecting rod shaft, gear, hydraulic cylinder, etc. It requires not only corresponding hardness and strength, but also good wear resistance and surface fatigue resistance. The micro-arc hardening was carried out on the surface of QT600-3. Results of orthogonal test showed that when the current was 19 kA, the speed of work piece was 0.7 r/min and the contact pressure was 600 N, a white layer composed of uniform and fine martensite, cementite and retained austenite was formed on the surface of QT600-3. The hardness of the hardened layer reached 850 HV2 N. Friction and wear tests showed that the layer greatly improved the wear resistance of the material.

Key words： micro arc strengthening; QT600-3; microstructure; mechanical properties

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