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激光熔覆FeCrB/NiCrB合金涂层的摩擦磨损与抗冲击性能
          
Friction and Wear Properties and Impact Resistance of Laser CladdedFeCrB/NiCrB Alloy Coating

摘    要
采用激光熔覆技术在H13钢基体上制备FeCrB/NiCrB合金涂层,研究了涂层的显微组织、硬度、摩擦磨损性能和抗冲击性能。结果表明:FeCrB/NiCrB合金涂层中未见明显裂纹缺陷,成形质量较好;NiCrB合金黏结层主要由等轴晶和树枝晶组成,与FeCrB合金涂层结合紧密;FeCrB合金涂层、NiCrB合金黏结层和基体的平均硬度分别为840,403,285 HV;在300,600,900 N载荷下,涂层的摩擦因数分别为0.35,0.44,0.42,对应的磨损量分别为5.29,248,300 mg;涂层的平均冲击吸收功为12 J,高于基体(3 J),断裂机理为韧性断裂。
标    签 梯度硬质合金   激光熔覆   显微组织   摩擦磨损   抗冲击性能   gradient cemented carbide   laser cladding   microstructure   friction and wear   impact resistance  
 
Abstract
FeCrB/NiCrB alloy coating was prepared by laser cladding technique on H13 steel substrate, and the microstructure, hardness, friction and wear performance and impact resistance of the coating were studied. The results show that there were no obvious cracks in the FeCrB/NiCrB alloy coating, and the forming quality was good. NiCrB alloy bonding layer was mainly composed of equiaxed and dendrite grains, and was tightly bonded to FeCrB alloy coating. The average hardness of FeCrB alloy coating, NiCrB alloy bonding layer and the substrate was 840, 403, 285 HV, respectively. Under 300, 600, 900 N load, the friction factors of the coating were 0.35, 0.44 and 0.42, respectively, and the corresponding wear amounts were 5.29, 248, 300 mg, respectively. The average impact absorbing energy of the coating was 12 J and was higher than 3 J of substrate; the fracture mechanism was ductile fracture.

中图分类号 TG115   DOI 10.11973/jxgccl202310010

 
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所属栏目 新材料 新工艺

基金项目 国家重点研发计划项目(2023YFE0201600);中央高校基本科研业务费专项资金资助项目(2021ZDPY0223);江苏高校优势学科建设工程资助项目

收稿日期 2022/8/22

修改稿日期 2023/8/17

网络出版日期

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联系人作者程延海教授

备注谭小波(1976-),男,四川成都人,工程师,学士

引用该论文: TAN Xiaobo,ZHOU Jiali,LI Yun,ZHANG Longguan,LI Kaifu,HUANG Bin,XIE Shuchang,CHENG Yanhai. Friction and Wear Properties and Impact Resistance of Laser CladdedFeCrB/NiCrB Alloy Coating[J]. Materials for mechancial engineering, 2023, 47(10): 62~67
谭小波,周嘉利,李云,章龙管,李开富,黄斌,谢树昌,程延海. 激光熔覆FeCrB/NiCrB合金涂层的摩擦磨损与抗冲击性能[J]. 机械工程材料, 2023, 47(10): 62~67


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