45~#钢管激光熔覆不锈钢粉末的参数研究  

Study on Parameters of Laser Cladding Stainless Steel Alloy Powder with 45 Steel Tubes

作　　者：张美美[1] 白培康[1] 刘斌[1] 

机构地区：[1]中北大学材料科学与工程学院,山西太原030051

出　　处：《铸造》2017年第12期1308-1312,共5页Foundry

基　　金：山西省重点研发项目;煤机设备关键零部件耐磨耐蚀层激光熔覆制备技术(201603D121002-2)

摘　　要：通过改变扫描速度和功率研究在45#钢管表面激光熔覆不锈钢粉末,观察熔覆层的显微组织,测试试样硬度。结果表明,显微硬度从结合区域到熔覆层顶部随扫描速度增加而增加,随功率增加而增加,其整体硬度相对基体提高4倍左右。根据上述分析得出最佳工艺参数:功率为2 100 W,扫描速度12 mm/s,用该参数熔覆45~#钢管,试验得出在30%搭接率条件下能够获得硬度显著提高的管材,表明该组参数能够满足激光熔覆45~#钢管的应用研究,从而为不锈钢熔覆中碳钢零件提供参考。Laser cladding with changing the scanning speed and laser power were used to fabricate stainless steel alloy coatings on the substrate of 45 steel. The microstructures were observed, and the microhardness of the specimens was tested. It can be observed that the microhardness of coatings increased with the increase of scanning speed and laser power, and their difference were reflected in different area of the coating. Meanwhile, the average hardness of the coatings is 4 times than that of the substrate. According to above analysis, the optimum parameters were obtained： scanning speed of 12 mm/s with the laser power of 2 100 W. Subsequently, this set of parameters were used for multi-layers test on 45 steel tube, the results show that the pipe with remarkable hardness can be obtained under the condition of 30% lapping rate, which indicated that the chosen parameters were suitable for the application research of 45 steel pipe. This provides reference for medium carbon steel parts during the process of laser cladding on practical application.

关 键 词：激光熔覆 不锈钢粉末 显微硬度 45^#钢管 

分 类 号：TG174.4[金属学及工艺—金属表面处理]