焊管2025，Vol.48Issue(6)：62-68,79,8.DOI:10.19291/j.cnki.1001-3938.2025.06.008
25Cr2Ni4MoV转子轴颈激光熔覆层组织性能及残余应力研究
Research on Microstructure Properties and Residual Stress of Laser Cladding of 25Cr2Ni4MoV Rotor Journal
刘磊 1朱禹 2常哲 3姜提会 4王中莹 5李勇 3刘福广 3刘刚3
作者信息
- 1. 国能宁夏灵武发电有限公司,宁夏 灵武 751400
- 2. 黄冈中电大别山发电运营管理有限公司,湖北 黄冈 438699
- 3. 西安热工研究院有限公司,西安 710054
- 4. 中煤哈密发电有限公司,新疆 哈密 839000
- 5. 河北邯峰发电有限责任公司,河北 邯郸 056200
- 折叠
摘要
Abstract
For the damage of 25Cr2Ni4MoV rotor journal,laser cladding on plates with Inconel 625 powder was applied by using the same material to determine the feasibility of on-site laser cladding repair.Microstructure observation,microhardness tests and residual stress simulation were applied.The results showed that the cladding layers were free from pores and cracks.The microstructure of the cladding layer is mainly γ-Ni austenite,with elemental segregation existing between dendrites.The microhardness of the cladding layer was ranging from 240HV0.3 to 260HV0.3,lower than that of the heat affected zone(up to 308HV0.3).The peak longitudinal residual stress(794 MPa)was concentrated in the heat affected zone and the peak transverse stress(350 MPa)was concentrated in the surface regions of the cladding layer and back regions of the base material.The simulation results were in good agreement with the XRD residual stress tests.Results provide theoretical guidance and data support for the damage repair of journal in power plant.关键词
25Cr2Ni4MoV/Inconel 625粉末/激光熔覆/有限元分析/残余应力Key words
25Cr2Ni4MoV/Inconel 625 powder/laser cladding/finite element analysis/residual stress分类
矿业与冶金引用本文复制引用
刘磊,朱禹,常哲,姜提会,王中莹,李勇,刘福广,刘刚..25Cr2Ni4MoV转子轴颈激光熔覆层组织性能及残余应力研究[J].焊管,2025,48(6):62-68,79,8.
