粉末冶金技术2025，Vol.43Issue(2)：170-179,10.DOI:10.19591/j.cnki.cn11-1974/tf.2023080003
激光功率对激光熔覆Stellite 6合金涂层微观组织及耐磨性能的影响
Effect of laser power on microstructure and wear resistance of laser cladding Stellite 6 alloy coatings
张维 1董超芳 2尚宪和 3胡明磊 3隋飞 2贺星 2周梁栋 4倪晓晴 4张亮 4孔德成5
作者信息
- 1. 中核核电运行管理有限公司,嘉兴 314300||北京科技大学新材料技术研究院,北京 100083||北京科技大学北京材料基因工程高精尖创新中心,北京 100083
- 2. 北京科技大学新材料技术研究院,北京 100083||北京科技大学北京材料基因工程高精尖创新中心,北京 100083
- 3. 中核核电运行管理有限公司,嘉兴 314300
- 4. 上海材料研究所 3D打印材料工程技术研究中心,上海 200437
- 5. 上海交通大学材料科学与工程学院,上海 200240
- 折叠
摘要
Abstract
Stellite 6 alloy coatings were prepared on 0Cr17Ni4Cu4Nb stainless steels by laser cladding technology.The microstructure of the coatings was characterized by optical microscopy(OM),scanning electron microscopy(SEM),energy dispersive spectroscopy(EDS),electron backscatter diffraction(EBSD),and confocal laser scanning microscopy(CLSM).The hardness and wear resistance of the samples were tested.In the results,all the coatings prepared with different laser powers have no obvious defects,such as pores and cracks,and show the good metallurgical bonding with the substrate.The microstructure of the coatings is mainly consisted of the coarse columnar dendrite at the bottom,the coarse dendritic crystals in the middle,and the fine equiaxed dendrite on the top.The hardness of the coatings(HV 420～510)is significantly higher than that of the substrate(HV 206),and the hardness gradually decreases from the top of coating to the substrate.The samples with the laser power of 1400 W exhibit the smallest and most uniform microstructure,while there are more hard phases(carbides)between dendrites.Therefore,the 1400 W samples exhibit the highest hardness.After the wear experiment testing,all the sample surfaces show the parallel furrows along the sliding direction without the obvious accumulation of debris,which belongs to the abrasive wear mechanism.The samples with the laser power of 1400 W have the lowest friction coefficient,while show the narrowest wear scar width(928.463 μm)and the minimum depth of wear marks(45.087 μm),exhibiting the best wear resistance.关键词
激光熔覆/激光功率/Co基硬质合金/涂层/硬度/耐磨性能Key words
laser cladding/laser power/Co-based cemented carbide/coatings/hardness/wear resistance分类
金属材料引用本文复制引用
张维,董超芳,尚宪和,胡明磊,隋飞,贺星,周梁栋,倪晓晴,张亮,孔德成..激光功率对激光熔覆Stellite 6合金涂层微观组织及耐磨性能的影响[J].粉末冶金技术,2025,43(2):170-179,10.
