12Cr钢表面激光熔覆1Cr0.5Mo合金组织与性能研究
Research on the microstructure and properties of laser cladding 1Cr0.5Mo alloy on the surface of 12Cr steel
徐顺鑫 1王大勇 2张峻铭 1孙震 3于兴华 4张国荣1
作者信息
- 1. 东方电气集团东方汽轮机有限公司,四川 德阳 618000
- 2. 东方电气集团科学技术研究院有限公司,四川 成都 618000
- 3. 北京理工大学 重庆创新中心,重庆 500112;山东大学 工程训练中心,山东 济南 250002
- 4. 北京理工大学 重庆创新中心,重庆 500112
- 折叠
摘要
12Cr钢因其具有优异的高温蠕变强度及良好的抗蒸汽氧化能力,在超超临界机组中得到了广泛应用.为保证轴颈区域的耐磨性,需在其表面制备1层1Cr0.5Mo合金,但常规的埋弧焊等工艺易产生微裂纹等缺陷.文中采用激光熔覆工艺,在12Cr钢表面熔覆1Cr0.5Mo合金,并针对熔覆层的组织及性能进行研究,通过对激光熔覆试样进行成分分析、PT试验、微观金相观察、硬度测试和拉伸试验,初步验证了激光熔覆技术在保证12Cr钢表面耐磨性能方面的可行性.
Abstract
12Cr steel has been widely used in ultra supercritical units due to its excellent high temperature creep strength and good resistance to steam oxidation.To ensure the wear resistance of the journal area,a layer of 1Cr0.5Mo alloy needs to be prepared on the surface.However,conventional processes such as submerged arc welding are prone to defects such as microcracks.In this paper,laser cladding technology was adopted to melt 1Cr0.5Mo alloy on the surface of 12Cr steel,and the microstructure and properties of the cladding layer were studied.Through component analysis,PT testing,microscopic metallographic observation,hardness measurement and tensile testing of laser cladding samples,the feasibility of laser cladding technology in ensuring the surface wear resistance of 12Cr steel was preliminarily verified.
关键词
火电汽轮机/12Cr钢/激光熔覆/1Cr0.5Mo合金Key words
thermal power turbine/12Cr steel/laser cladding/1Cr0.5Mo alloy引用本文复制引用
出版年
2024
NETL
NSTL
万方数据