北京工业大学材料科学与工程学院,北京工业大学材料科学与工程学院,北京工业大学材料科学与工程学院,北京工业大学材料科学与工程学院,北京工业大学材料科学与工程学院,北京首钢机电有限公司
感谢国家自然科学基金(51475005、51275006)和北京市教委科研项目(PXM2015-014204-500170)的资助。
School of Materials Science and Engineering,Beijing University of Technology,School of Materials Science and Engineering,Beijing University of Technology,School of Materials Science and Engineering,Beijing University of Technology,School of Materials Science and Engineering,Beijing University of Technology,School of Materials Science and Engineering,Beijing University of Technology,Beijing Shougang Machinery Co,LTD
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利用6kW光纤激光器在Q235钢板表面激光熔覆Ni基WC复合涂层。使用光学显微镜、扫描电子显微镜、能谱仪、显微硬度计，研究了不同激光功率下熔覆层组织形态、成分和显微硬度的变化规律。结果表明：WC部分发生溶解并与其他元素相互作用形成共晶物，析出后以块状、条状、粒状等形态存在；随着激光功率的增加，熔覆层的高度、熔深和稀释率逐渐增加，熔覆层平均硬度先增加后减小，当激光功率为2500W时能够获得最高硬度，可达基体硬度的5倍左右。
Abstract: Laser cladding Ni-based WC composite coating was fabricated on the surface of Q235 steel by using 6kW fiber laser. By using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and micro-hardness tester, we investigated the morphology, composition, and micro-hardness of composite coating in different laser power. The results show that WC particles partially dissolve and react with other elements to form eutectics, which exist in the shape of block, strip and grain. The cladding height, penetration and dilution of laser cladding coating increased gradually with the increase of laser power. Moreover, the average hardness of the coating increased first and then decreased with the increase of laser power. When the laser power was 2500W, cladding coating could get the highest hardness, which could reach 5 times of the matrix hardness.
引用本文
王开明,雷永平,符寒光,杨勇维,李庆棠,苏振清.功率对激光熔敷Ni基WC涂层组织与硬度的影响[J].稀有金属材料与工程,2017,46(11):3474~3478.[Wang-Kaiming, Lei-Yongping, Fu-Hanguang, Yang-Yongwei, Li-Qingtang, Su-Zhenqing. The Influence of Power on Microstructure and Hardness of Laser Cladding Ni-based WC Coating[J]. Rare Metal Materials and Engineering,2017,46(11):3474~3478.]
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历史
- 收稿日期:2015-08-10
- 最后修改日期:2015-11-17
- 录用日期:2015-12-08
- 在线发布日期: 2017-12-13