粉末冶金技术2026，Vol.44Issue(3)：313-320,8.DOI:10.19591/j.cnki.cn11-1974/tf.2025070006
WC颗粒增强Ni基复合涂层的微观组织与力学性能
Microstructure and mechanical properties of WC particle reinforced Ni-based composite coatings
摘要
Abstract
To resolve the problem of WC particle delamination and decomposition during the preparation of the composite coatings,the WC particles and Ni-based alloy composite powders were employed to fabricate the WC particle reinforced Ni-based composite coatings by laser cladding technology on 34MnB5 steels.The effect of cladding power on the microstructure and properties of the coatings was systematically investigated.The microstructure and phase composition of the powders and coatings were characterized by optical microscope,scanning electron microscope,energy dispersive spectrometer,and X-ray diffractometer.The layer thickness and WC volume fraction were measured by Image J software,while the hardness and tribological properties were evaluated by microhardness testing and ASTM G65 standard wear experiments.The results show that the hardness and surface morphology of the composite coatings are significantly improved with increasing cladding power,however,the WC volume fraction in coatings is decreased from 41.6％to 30.2％.When the cladding power is high,the overheating may lead to the decomposition of WC particles to form free C and W atoms,which can be dissolved into the Ni-based matrix or formed W-rich carbides lead to the hardness elevating of the matrix.The tribological properties testing show that the wear resistance is positively correlated with the volume fraction of WC particles under low-stress abrasion condition.So,the wear resistance of the composite coatings is preferred when the cladding power is 1.4 kW.However,when the cladding power is 1.8 kW,there is almost no cracks and higher surface quality,which is suitable for applications on the balancing condition of surface qualities and impact resistance.关键词
WC-Ni基复合涂层/激光熔覆/微观组织/耐磨性能Key words
WC-Ni composite coatings/laser cladding/microstructure/wear resistance分类
矿业与冶金引用本文复制引用
吴宪吉,孟杰,闫德胜,潘雪新,杨志荣,胡小峰,王宪德,姜海昌..WC颗粒增强Ni基复合涂层的微观组织与力学性能[J].粉末冶金技术,2026,44(3):313-320,8.基金项目
中国科学院战略性先导科技专项(A类)(XDA28040200) （A类）
吉林省与中国科学院科技合作高技术产业化专项资金项目(2024SYHZ0004) （2024SYHZ0004）
