Research on Electrolytic Plasma Surface Heat Treatment Technology

NIU Chenrui; DAI Fengxian; ZHANG Junjie; TARDOV A G; ZHAO Junjun

doi:10.7512/j.issn.1001-2303.2024.11.17

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Research on Electrolytic Plasma Surface Heat Treatment Technology
Vol. 54, Issue 11, Pages: 128-132(2024)
Received：15 October 2024，

Published：25 November 2024
DOI： 10.7512/j.issn.1001-2303.2024.11.17
稿件说明：

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牛辰睿，代锋先，张俊杰，等.电解等离子表面热处理工艺研究［J］.电焊机，2024，54（11）：128-132. DOI： 10.7512/j.issn.1001-2303.2024.11.17.

NIU Chenrui, DAI Fengxian, ZHANG Junjie, et al.Research on Electrolytic Plasma Surface Heat Treatment Technology[J].Electric Welding Machine, 2024, 54(11): 128-132. DOI： 10.7512/j.issn.1001-2303.2024.11.17.

摘要

采用电解等离子表面处理技术对3Cr13不锈钢进行表面处理，利用金相组织观察、显微硬度测试等手段探究了不同处理时间下试样的组织变化和硬度分布。研究结果表明，该技术能够在短时间内完成指定区域硬化处理，经电解等离子表面处理后形成球冠状硬化区域，完全硬化区为马氏体组织以及残余奥氏体，晶粒尺寸约为基体尺寸的2~3倍，向深处平滑过渡。不完全硬化区组织为粒状组织，晶粒细化区则为粒状珠光体组织。硬化层最高显微硬度值可达717.9 HV0.1，硬化层深度可达7.5 mm以上，其中500 HV0.1以上硬化层深度＞3 mm。处理时间的增加能够提升最高硬度值以及硬化层深度，硬化层深度受时间因素的影响更为明显，500 HV0.1以上硬化层深度由0.4 mm可提升至3.5 mm。

Abstract

The electrolytic plasma surface treatment technology was used to treat 3Cr13 stainless steel

and the microstructural changes and hardness distribution of the samples under different treatment times were investigated using metallographic structure observation and microhardness testing. The research results show that this technology can complete the hardening treatment of the specified area in a short time. After electrolytic plasma surface treatment

a spherical crown-shaped hardened area is formed

with the fully hardened area consisting of martensite structure and residual austenite

and the grain size is about 2-3 times that of the base material

transitioning smoothly towards the depth. The incompletely hardened area has a granular structure

while the grain refinement area has a granular pearlite structure. The highest microhardness value of the hardened layer can reach 717.9 HV0.1

and the depth of the hardened layer can exceed 7.5 mm

with the depth of the hardened layer above 500 HV0.1 being greater than 3 mm. Increasing the treatment time can increase the maximum hardness value and the depth of the hardened layer

with the depth of the hardened layer being more significantly affected by time factors

and the depth of the hardened layer above 500 HV0.1 can be increased from 0.4 mm to 3.5 mm.

关键词

Keywords

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