摘要
过流部件在服役过程中常因表面磨损而失效,与传统耐磨处理方法相比,采用金刚石钎涂技术处理后的过流部件使用寿命显著提高。采用钎涂技术分别制备NiCrBSi、NiCrBSi/WC、NiCrBSi/金刚石耐磨钎涂层,涂层与基体冶金结合良好,NiCrBSi涂层生成碳化铬、硼化铬、硼化镍等强化相,NiCrBSi/WC涂层中WC颗粒的分布密度由涂层表面至底部逐渐增大,NiCrBSi/金刚石涂层中金刚石颗粒均匀弥散分布;在相同磨损试验条件下,NiCrBSi/金刚石涂层失重约为NiCrBSi涂层的1/5、NiCrBSi/WC涂层的1/3,这表明NiCrBSi/金刚石涂层具有优异的耐磨性。将金刚石钎涂技术在农机触土部件旋耕刀、螺旋输送机叶片上进行工程应用,经现场试验验证,金刚石钎涂旋耕刀和金刚石钎涂螺旋叶片的耐磨性及使用寿命得到了大幅提高。为金刚石钎涂技术将来在其他过流部件上的应用与推广提供了理论参考和实践经验。
Flow passage components often fail due to surface wear in service.The traditional wear-resistant treatment method has limited effect on improving the service life of flow passage components,and there are some problems such as expensive equipment,complex process or high cost of raw materials.Researchers observed prepared Ni Cr BSi,Ni Cr BSi/WC,Ni Cr BSi/diamond wear-resistant braze coating,and found that the metallurgical bonding between the coating and the matrix was good.In Ni Cr BSi coating,chromium carbide,chromium boride,nickel boride and other strengthening phases are formed.In Ni Cr BSi/WC coating,the distribution density of WC particles gradually increases from the coating surface to the bottom,while in Ni Cr BSi/diamond coating,diamond particles are uniformly dispersed.Under the same wear test conditions,the mass loss of Ni Cr BSi/diamond coating is about 1/5 that of Ni Cr BSi coating and 1/3 that of Ni Cr BSi/WC coating,indicating that Ni Cr BSi/diamond coating has excellent wear resistance.The diamond brazecoating technology has been applied to rotating blades of soil-engaging components and screw conveyor blade of agricultural machinery touching the soil.The field test shows that the wear resistance and service life of the rotary tiller and screw blade coated with diamond brazing have been greatly improved.It provides theoretical reference and practical experience for the application of diamond brazing technology in other flow parts in the future.
作者
李宇佳
孙志鹏
张雷
刘健波
李晓迪
王宇
LI Yujia;SUN Zhipeng;ZHANG Lei;LIU Jianbo;LI Xiaodi;WANG Yu(China Innovation Academy of Intelligent Equipment(Ningbo)Co.,Ltd.,Ningbo 315700,China;State Key Laboratory of Advanced Brazing Filler Metals&Technology,Zhengzhou Research Institute of Mechanical Engineering Co.,Ltd,Zhengzhou 450001,China)
出处
《电焊机》
2021年第10期19-23,I0004,共6页
Electric Welding Machine
基金
河南省重大关键技术揭榜攻关项目(191110111000)
宁波市“3315”人才计划2020年创新团队C类。
关键词
钎涂
金刚石涂层
磨损失效
耐磨涂层
过流部件
brazecoating
diamond coating
wear failure
wear-resistant coating
flow passage components
