激光功率对WC增强Ni35合金激光熔覆层组织与性能的影响
Effect of Laser Power on Microstructure and Properties of Laser Cladding Layer of WC Reinforced Ni35 Alloy
摘 要
采用不同激光功率（1.1，1.3，1.5 kW）在45钢表面激光熔覆制备WC增强Ni35合金熔覆层，利用光学显微镜、扫描电子显微镜、X射线衍射仪、显微维氏硬度计、摩擦磨损试验机、电化学工作站等研究了激光功率对熔覆层组织与性能的影响。结果表明：随着激光功率增大，熔覆层表面宏观裂纹减少，熔覆层稀释率增大；随着激光功率增大，熔覆层的显微硬度升高，磨损量和摩擦因数减小，不同激光功率熔覆层的耐磨性均优于基体；当激光功率为1.5 kW时，相比于基体，熔覆层的表面平均硬度提高了约270%，磨损量和摩擦因数分别降低了95.2%和54.93%；随着激光功率的增大，熔覆层的自腐蚀电位先减小后增加，自腐蚀电流密度先增大后降低，当激光功率为1.5 kW时，熔覆层的自腐蚀电流密度最小，耐腐蚀性相对较好。
WC/Ni35合金熔覆层
激光功率
显微组织
耐腐蚀性能
耐磨损性能
laser cladding
WC/Ni35 alloy cladding layer
laser power
microstructure
corrosion resistance
wear resistance
Abstract
WC reinforced Ni35 alloy ladding layers were prepared on 45 steel surface by laser cladding at different laser powers (1.1, 1.3, 1.5 kW). The effect of laser power on the microstructure and performance of the cladding layer was studied by optical microscope, scanning electron microscope, X-ray diffractometer, micro Vickers hardness tester, friction and wear testing machine, electrochemical workstation, etc. The results show that with increasing laser power, the macroscopic cracks on the surface of the cladding layer decreased, and the dilution rate of the cladding layer increased. With increasing laser power, the microhardness of the cladding layer increased, and the wear loss and friction factor decreased. The wear resistance of cladding layers with different laser powers was better than that of the matrix. When the laser power was 1.5 kW, the average hardness of the cladding layer surface was increased by 270%, and the wear loss and friction factor was reduced by 95.2% and 54.93%, comparing with that of the matrix. With increasing laser power, the self-corrosion potential of the cladding layer decreased first and then increased, and the self-corrosion current density increased first and then decreased. When the laser power was 1.5 kW, the self-corrosion current density of the cladding layer was the smallest, the corrosion resistance was relatively good.
中图分类号 TG174.4 DOI 10.11973/jxgccl202210005
所属栏目 试验研究
基金项目 国家自然科学基金资助项目（51865055，52161017）；新疆维吾尔自治区天山英才计划项目（201720025）
收稿日期 2021/6/25
修改稿日期 2022/6/24
网络出版日期
作者单位点击查看
备注刘伟斌(1995-),男,甘肃定西人,硕士研究生
引用该论文: LIU Weibin,LI Xinmei,JING Zhenyu. Effect of Laser Power on Microstructure and Properties of Laser Cladding Layer of WC Reinforced Ni35 Alloy[J]. Materials for mechancial engineering, 2022, 46(10): 27～33
刘伟斌,李新梅,井振宇. 激光功率对WC增强Ni35合金激光熔覆层组织与性能的影响[J]. 机械工程材料, 2022, 46(10): 27～33
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【20】井振宇.激光熔覆Ni35+WC+Cr涂层组织与性能研究[D].乌鲁木齐:新疆大学, 2020. JING Z Y.Study on microstructure and properties of laser cladding Ni35+WC+Cr coating[D].Urumqi:Xinjiang University, 2020.
【21】韩晨阳, 孙耀宁, 王国建, 等.不锈钢冷轧辊激光表面修复工艺研究[J].应用激光, 2020, 40(4):598-604. HAN C Y, SUN Y N, WANG G J, et al.Study on laser surface repair technology of stainless steel cold roll[J].Applied Laser, 2020, 40(4):598-604.
【22】权秀敏, 陆玉兵, 黄红兵, 等.激光熔覆TiB-TiC/Co基复合涂层宏观形貌研究[J].西昌学院学报(自然科学版), 2022, 36(2):55-59. QUAN X M, LU Y B, HUANG H B, et al.Study of the macro form of the TiB-TiC/Co-based composite coatings by laser cladding[J].Journal of xichang University (Natural Science Edition), 2022, 36(2):55-59.
【23】井振宇, 李新梅.激光熔覆Ni35WC11涂层的参数优化设计[J].激光与光电子学进展, 2020, 57(9):091406. JING Z Y, LI X M.Parameter optimization design of laser cladding Ni35WC11 coating[J].Laser & Optoelectronics Progress, 2020, 57(9):091406.
【24】钱绍祥.激光熔覆镍基合金及其表面激光喷丸的微观结构、强化机理与性能研究[D].镇江:江苏大学, 2021. QIAN S X.Research on microstructure, strengthening mechanism and performance of laser cladding nickel-based alloy and its surface laser peening[D].Zhenjiang:Jiangsu University, 2021.
【25】黄雪.激光熔覆钴基合金加碳化钨混合粉末熔覆层性能的研究[D].沈阳:沈阳工业大学, 2013. HUANG X.Reasearch on performance of laser cladding mixed powder with Co-based alloy and WC[D].Shenyang:Shenyang University of Technology, 2013.
【26】朱红梅, 胡际鹏, 李柏春, 等.铁基材料表面激光熔覆不锈钢涂层的研究进展[J].表面技术, 2020, 49(3):74-84. ZHU H M, HU J P, LI B C, et al.Research progress of laser cladding stainless steel coating on Fe-based substrate[J].Surface Technology, 2020, 49(3):74-84.
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