机械振动TiC-Fe3Al-Ni熔覆层的组织与性能

doi:10.13251/j.issn.0254-6051.2024.11.045

金属热处理 ›› 2024, Vol. 49 ›› Issue (11): 290-295.DOI: 10.13251/j.issn.0254-6051.2024.11.045

机械振动TiC-Fe₃Al-Ni熔覆层的组织与性能

郭珺^1,2, 周俊杰^1,2, 梁国星^1,2, 黄永贵^1,2

1.太原理工大学机械工程学院精密加工山西省重点实验室, 山西太原 030024;
2.高端精密刀具系统省技术创新中心, 山西太原 030024

收稿日期:2024-05-28 修回日期:2024-09-29 出版日期:2024-11-25 发布日期:2025-01-09
作者简介:郭珺(1994—),女,硕士,主要研究方向为高能束加工,E-mail:guojun02@tyut.edu.cn
基金资助:
中央引导地方科技发展资金项目(YDZJSX2021B003);国家自然科学基金(52105473);山西省基础研究计划(20210302124050,20210302124121);山西省创新平台基地建设专项(202104010911007);山西省高等学校科技创新项目(2021L086)

Microstructure and properties of TiC-Fe₃Al-Ni clad layer prepared by mechanical vibration

Guo Jun^1,2, Zhou Junjie^1,2, Liang Guoxing^1,2, Huang Yonggui^1,2

1. Shanxi Key Laboratory of Precision Machining, College of Mechanical Engineering, Taiyuan University of Technology, Taiyuan Shanxi 030024, China;
2. Provincial Technology Innovation Center of Advanced Precision Tool System, Taiyuan Shanxi 030024, China

Received:2024-05-28 Revised:2024-09-29 Online:2024-11-25 Published:2025-01-09

摘要/Abstract

摘要： 为提高42CrMo钢表面耐磨性,改善其表面熔覆层中经常出现的气孔和裂纹缺陷,提高熔覆层整体性能,运用激光熔覆复合不同的机械振动模式在42CrMo钢表面制备了TiC-Fe₃Al-Ni熔覆层。借助SEM、XRD、显微硬度计与摩擦磨损试验机,分析了不同振动方向下熔覆层的物相组成、微观组织及性能。结果表明,机械振动的加入使熔覆层中的气孔与裂纹得到有效抑制,在晶粒生长的过程中,机械能量可破坏枝晶的晶臂,减少枝晶的生长,促进等轴晶的生成,提升熔覆层的致密度。熔覆层物相主要由TiC、Ti₈C₅、Fe₃Al、FeO、AlNi组成,施加机械振动后物相组成无明显变化。垂直方向振动对熔覆层显微组织有明显改善,可使熔覆层平均硬度(1891.78 HV0.2)较无机械振动提升一倍以上,耐磨性最优,磨损量为1.57 mg,摩擦过程波动小。

关键词: 激光熔覆, 机械振动, 42CrMo钢, 显微组织, 硬度

Abstract: In order to enhance the wear resistance of 42CrMo steel surface and improve the porosity and crack defects frequently generated in the clad layers, as well as the performance of the clad layer, TiC-Fe₃Al-Ni clad layer was prepared on the surface of 42CrMo steel via laser cladding, and mechanical vibration carrying different modes was introduced. The phase composition, microstructure and properties of the clad layer under different vibration directions were analyzed by means of SEM, XRD, microhardness tester and friction and wear tester. The results show that the porosities and cracks in the clad layer are significantly restrained due to the mechanical vibration. Furthermore, part of crystal arms of dendrites is broken by the mechanical energy coming from the vibration during the process of grain growth, and the dendrite growth is reduced. Therefore, the condition of equiaxial crystal growth is developed, and the compactness of the clad layer is strengthened. The clad layer primarily contains the phases of TiC, Ti₈C₅, Fe₃Al, FeO, as well as AlNi. Mechanical vibration has a little effect on changing the phase constituent of the clad layer. Vertical vibration significantly improves the microstructure of the clad layer. The mean hardness of the clad layer at vertical vibration reaches up to 1891.78 HV0.2, which is obviously higher than that without mechanical vibration, the wear resistance of the clad layer is optimal, with wear loss of 1.57 mg, and the wear process has small fluctuation.

Key words: laser cladding, mechanical vibration, 42CrMo steel, microstructure, hardness

中图分类号:

TG174.44

郭珺, 周俊杰, 梁国星, 黄永贵. 机械振动TiC-Fe₃Al-Ni熔覆层的组织与性能[J]. 金属热处理, 2024, 49(11): 290-295.

Guo Jun, Zhou Junjie, Liang Guoxing, Huang Yonggui. Microstructure and properties of TiC-Fe₃Al-Ni clad layer prepared by mechanical vibration[J]. Heat Treatment of Metals, 2024, 49(11): 290-295.

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机械振动TiC-Fe₃Al-Ni熔覆层的组织与性能

Microstructure and properties of TiC-Fe₃Al-Ni clad layer prepared by mechanical vibration

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