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

HU Shuzeng, CHENG Donghai, CHAO Bingxuan, YING Junlong, WANG De, WANG Jun, WANG Wenqin

doi:10.16577/j.issn.1001-1560.2025.0081

Materials Protection >

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

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

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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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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HU Shuzeng, CHENG Donghai, CHAO Bingxuan, YING Junlong, WANG De, WANG Jun, WANG Wenqin . Microstructure and Mechanical Properties of 30CrMnSiA Parts Repaired by Laser Cladding[J]. Materials Protection, 2025 , 58(5) : 100 -104 . DOI: 10.16577/j.issn.1001-1560.2025.0081

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