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| 扫描速度对硼化物金属陶瓷激光熔覆层组织和性能的影响 | |
| 引用本文： | 陈枭,纪岗昌,王洪涛,白小波. 扫描速度对硼化物金属陶瓷激光熔覆层组织和性能的影响[J]. 应用激光, 2012, 32(1): 40-44 |
| 作者姓名： | 陈枭 纪岗昌 王洪涛 白小波 |
| 作者单位： | 陈枭:九江学院机械与材料工程学院, 江西 九江 332005 纪岗昌:九江学院机械与材料工程学院, 江西 九江 332005 王洪涛:九江学院机械与材料工程学院, 江西 九江 332005 白小波:九江学院机械与材料工程学院, 江西 九江 332005 |
| 基金项目： | 江西省自然科学基金资助项目(项目编号： 2010GQC0117)、江西省教育厅科技资助项目(项目编号： GJJ12622)、江西省高校省级教改课题资助项目(项目编号：JXJG-11-17-10) |
| 摘 要： | 采用5 kW CO2激光器在45钢表面熔覆制备MoB/CoCr金属陶瓷涂层,采用SEM、EDS和显微硬度计分别对在不同扫描速度下熔覆区的微观组织结构、化学成分分布和硬度进行测试。结果表明:熔覆区组织致密、无裂纹;200 mm/s扫描速度下熔覆区的组织呈现树枝晶—胞状树枝晶—胞状晶过渡,400 mm/s扫描速度时,熔覆区的组织呈现胞状树枝晶—胞状晶—平面晶过渡;熔覆层的主要化学成分均为Mo、Cr、Co和Fe;熔覆区的显微硬度明显提高,是45钢基体硬度的9倍以上。 |
| 关 键 词： | MoB/CoCr 金属陶瓷 激光熔覆 硬度 |
| 收稿时间： | 2011-11-14 |
Effects of Scanning Velocity on Microstructure and Property of Laser Cladding Boride Cermet Coating |
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| Chen Xiao,Ji Gangchang,Wang Hongtao,Bai Xiaobo. Effects of Scanning Velocity on Microstructure and Property of Laser Cladding Boride Cermet Coating[J]. Applied Laser, 2012, 32(1): 40-44 | |
| Authors: | Chen Xiao Ji Gangchang Wang Hongtao Bai Xiaobo |
| Affiliation: | (School of Mechanical & Materials Engineering,Jiujiang University,Jiujiang,Jiangxi 332005,China) |
| Abstract: | MoB/CoCr cerm et coating on 45 steel was laser cladded using 5 kW continuous wave CO2 laser. The microstructure,energy spectrum and microhardness were tested by SEM, EDS and microhardness tester. The results show that the microstructure ofcladding layer is dense; microstucture of cladding zone with 200 mm/s scanning velocity consists of dentrite crystal, cystiform dentritecrystal and cystiform crystal and microstucture of cladding zone with 400 mm/s scanning velocity consists of cystiform dentrite crystal,cystiform crystal and flat crystal. The main components of cladding layer are Mo, Cr, Co and Fe. The microhardness increased obviously and the average microhardness of layer was more than nine times to that of the 45 steel. |
| Keywords: | MoB/CoCr cermet laser cladding microhardness |
| 本文献已被 CNKI 等数据库收录！ | |