30CrMnSiA叉形件的激光熔覆修复组织和性能的研究

呼树增, 程东海, 巢昺轩, 应俊龙, 王德, 王骏, 王文琴

doi:10.16577/j.issn.1001-1560.2025.0081

材料保护 >

2025 , Vol. 58 >Issue 5: 100 - 104

DOI: https://doi.org/10.16577/j.issn.1001-1560.2025.0081

激光表面改性技术专栏

30CrMnSiA叉形件的激光熔覆修复组织和性能的研究

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1.南昌航空大学材料科学与工程学院 2.昌河飞机工业(集团)有限责任公司 3.南昌大学先进制造学院

王德(1987－)，博士，副教授，主要研究方向:金属材料修复与表面强化技术，电话:18702538607，E-mail:wangde＠nchu.edu.cn

收稿日期: 2024-11-25

修回日期: 2025-01-06

录用日期: 2025-01-08

网络出版日期: 2025-06-10

基金资助

江西省重点研发计划项目(20202BBE52002)

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Microstructure and Mechanical Properties of 30CrMnSiA Parts Repaired by Laser Cladding

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(1.School of Materials Science and Engineering， Nanchang Hangkong University， Nanchang 330063， China；2.Changhe Aircraft Industry (Group) Co.， Ltd.， Jingdezhen 333002， China；3.School of Advanced Manufacturing， Nanchang University， Nanchang 330031， China)

WANG De (1987－)， Ph.D， Associate Professor， Research Focus: Metal Material Repair and Surface Strengthening Technology， Tel.: 18702538607， E-mail: wangde＠nchu.edu.cn

Received date: 2024-11-25

Revised date: 2025-01-06

Accepted date: 2025-01-08

Online published: 2025-06-10

Supported by

Jiangxi Province Key Research and Development Program(20202BBE52002)

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摘要

30CrMnSiA 钢被广泛用于特殊工装零件，这些工装零件在使用过程中经受循环应力而经常出现疲劳断裂等损伤。采用激光熔覆技术，在工艺试验基础上，选取最优参数对30CrMnSiA 损伤叉形件进行了激光修复，并分析了其显微组织和力学性能，采用疲劳试验机测试了其疲劳寿命。结果表明:修复层内组织致密，修复层与母材结合界面为典型的冶金结合，未出现裂纹等缺陷。焊缝强度比母材高，拉伸断口基本都在母材处。疲劳循环次数达到606 501次，比标准零件疲劳寿命提升了21.3%，满足零件使用要求。

关键词： 30CrMnSiA 钢; 激光修复; 疲劳寿命

本文引用格式

呼树增, 程东海, 巢昺轩, 应俊龙, 王德, 王骏, 王文琴 . 30CrMnSiA叉形件的激光熔覆修复组织和性能的研究[J]. 材料保护, 2025 , 58(5) : 100 -104 . DOI: 10.16577/j.issn.1001-1560.2025.0081

Abstract

30CrMnSiA steel is extensively utilized in specialized tooling components， which frequently experience fatigue fractures and other damage mechanisms under cyclic stress during service.In this work，the laser cladding technology was adopted，and the microstructure and mechanical properties were analyzed based on process experiments.The optimal parameters were selected to perform laser repair on the damaged fork-shaped part of 30CrMnSiA， and its fatigue life was tested by a fatigue testing machine.Results showed that the microstructure within the repair layer was dense.The bonding interface between the repair layer and the base material was a typical metallurgical bonding，and no defects such as cracks occurred.The strength of the weld seam was higher than that of the base metal， and the tensile fracture was basically at the base metal.Besides，the specimen achieved a fatigue cycle count of 606 501，representing a 21.3%improvement in fatigue life compared to standard parts， meeting all operational requirements for specialized tooling components.

Key words： 30CrMnSiA steel; laser repair; fatigue life

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