摘要
为解决农机触土部件耐磨性能差、使用寿命短的问题,采用氩弧焊技术和等离子喷焊技术在锰硼钢基体上分别制备了Fe基合金耐磨层和Ni基WC合金耐磨层,并与进口雷肯犁铲尖进行了涂层耐磨性和基体冲击韧性的对比分析。利用光学显微镜分析了耐磨层和基体的金相组织,利用显微硬度计测试了耐磨层和基体的显微硬度,利用冲击摩擦磨料磨损试验机测试了耐磨层的耐磨性能和基体的冲击韧性。结果表明:雷肯犁铲尖和试验品基体均为回火马氏体组织,试验品基体的硬度与雷肯犁铲尖基体的硬度相当,试验品基体的冲击功是雷肯犁铲尖基体的1.8倍。雷肯犁铲尖的耐磨层硬度平均值为63.62HRC,Fe、Ni基耐磨层的硬度平均值分别为67.63HRC和68.16HRC。田间试验结果表明:Fe基耐磨层锰硼钢犁铲尖的磨损量高于雷肯犁铲尖,相对增加了6.8%;Ni基耐磨层锰硼钢犁铲尖的磨损量低于雷肯犁铲尖,相对减少了10.8%。该研究可为提升犁铲的耐磨性能提供参考。
In order to solve the problems of poor abrasion resistance and short service life of soil-contacting parts of agricultural machinery, argon arc welding and plasma spray welding were used to prepare Fe-based alloy wear-resistant layers and Ni-based WC alloy wear-resistant layers on the manganese-boron steel substrate. A comparative analysis of the wear resistance of the coating and the impact toughness of the substrate were performed with the imported LEMKEN plow blade. The metallurgical structure of the wear-resistant layer and the matrix was analyzed using an optical microscope. the micro-hardness of the wear-resistant layer and the matrix was tested using a micro-hardness tester, the wear resistance of the wear-resistant layer and the matrix were tested using an impact friction abrasive wear tester Impact toughness. The results show that both the LEMKEN shovel tip and the substrate of the test article are tempered martensite. The hardness of the test article is comparable to the hardness of the LEMKEN shovel tip substrate. The impact energy of the test article is the LEMKEN shovel tip substrate. 1.8 times. The average hardness of the wear layer ofLEMKEN plow blade is 63.62 HRC, and the average hardness of Fe and Ni-based wear layer is 67.63 HRC and 68.16 HRC, respectively. Field test results show that the wear amount of Fe-based wear-resistant manganese-boron steel plow blade is higher than that of LEMKEN plow blade, which is a relative increase of 6.8%. Ken’s plow tip decreased by 10.8%. This study can provide a reference for improving the wear resistance of ploughshares.
作者
李开杰
谢建华
郑炫
杨志荣
杨怀君
Li Kaijie;Xie Jianhua;Zheng Xuan;Yang Zhirong;Yang Huaijun(College of Mechanical and Electrical Engineering,Xinjiang Agricultural University,Urumqi 830052,China;Institute of Mechanical Equipment,Xinjiang Academy of Agricultural Reclamation,Shihezi 832000,China;Metal Research Institute of Chinese Academy of Sciences,Shenyang 110016,China)
出处
《农机化研究》
北大核心
2021年第8期208-213,共6页
Journal of Agricultural Mechanization Research
基金
兵团重大科技项目(2017AA004-1)。
关键词
犁铲尖
耐磨性能
冲击韧性
耐磨层
金相组织
plow blade
wear resistance
impact toughness
wear layer
metallographic structure
