大功率光纤激光内孔熔覆装备开发及应用
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摘要
为提升液压支架用油缸缸体等内孔部件的服役性能,集成大功率光纤激光器开发了内孔熔覆装备,进行了27SiMn缸体内壁熔覆工艺验证,并取样进行了显微结构、硬度、耐磨性能检测,结果表明:缸体内壁熔覆表面平整无缺陷,熔覆层与基体呈冶金结合;熔覆层主要组织为马氏体;熔覆层硬度较基体略高,且耐磨性能约为基体的1.5倍,既提升了缸体内壁的使用性能又便于缸体内壁熔覆层的机械加工。
In order to improve the service performance of the inner hole parts such as the column cylinder of hydraulic support, the inner wall cladding equipment was developed with the integration of high-power fiber lasers, the cladding process on the inner wall in the 27 SiMn cylinder was verified, and the microstructure,hardness, and wear resistance were tested. The results show that the inner wall cladding surface is flat and without defects, and the cladding layer is metallurgical combined with the matrix. The main structure of the cladding layer is martensite. The hardness of the cladding layer is slightly higher than that of the substrate, and the wear resistance is about 1.5 times that of the substrate, as a result, not only the performance of the inner wall of the cylinder was improved but also the machining properties of the cladding coating in a narrow space are optimized.
In order to improve the service performance of the inner hole parts such as the column cylinder of hydraulic support, the inner wall cladding equipment was developed with the integration of high-power fiber lasers, the cladding process on the inner wall in the 27 SiMn cylinder was verified, and the microstructure,hardness, and wear resistance were tested. The results show that the inner wall cladding surface is flat and without defects, and the cladding layer is metallurgical combined with the matrix. The main structure of the cladding layer is martensite. The hardness of the cladding layer is slightly higher than that of the substrate, and the wear resistance is about 1.5 times that of the substrate, as a result, not only the performance of the inner wall of the cylinder was improved but also the machining properties of the cladding coating in a narrow space are optimized.
引文
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[8]蔡发,刘混举.液压支架立柱激光熔覆技术修复工艺分析[J].机械工程与自动化, 2016(4):125-128.
[9]杜学芸,何建群,王伟,等.激光功率对27SiMn不锈钢立柱熔覆层耐蚀性能的影响[J].矿山机械, 2018, 46(1):59-64.
[2]韩文静,宋进朝,刘学功,等.煤矿机械应用激光熔覆技术的研究与实践[J].电镀与精饰, 2016, 38(8):18-22.
[3]解文正,李春强,杨志伟,等.激光熔覆技术在液压支架上的应用研究[J].煤矿机械, 2010, 31(10):106-108.
[4]赵文强,苗鸿宾,游小红.矿用液压支柱的激光熔覆强化技术研究[J].矿山机械, 2011, 39(12):18-20.
[5]韩文静,张培训,汤其建,等.单体液压支柱缸体激光熔覆Ni60A+20%WC性能[J].煤炭学报,2012, 37(2):340-343.
[6]高锋,万滋雄,黄昭明.激光熔覆液压支架立柱工艺特点分析[J].矿山机械, 2013, 41(6):125-126.
[7]熊辉.用缩径模缩小钢管材料内孔[J].机械制造, 1998,(6):37.
[8]蔡发,刘混举.液压支架立柱激光熔覆技术修复工艺分析[J].机械工程与自动化, 2016(4):125-128.
[9]杜学芸,何建群,王伟,等.激光功率对27SiMn不锈钢立柱熔覆层耐蚀性能的影响[J].矿山机械, 2018, 46(1):59-64.