应用激光, 2018, 38 (1): 7, 网络出版: 2018-05-03
TiBCN粉末45钢激光熔覆应用研究
Application of TiBCN Powder as Additive in Laser Cladding of 45 Steel
TiBCN粉末 激光熔覆 熔覆层 组织结构 显微硬度 耐磨性 TiBCN powder laser cladding cladding layer microstructure microhardness wear resistance
摘要
将TiBCN粉末用于45钢激光熔覆, 为激光3D打印等增材制造探索新陶瓷添加材料, 把TiBCN粉末和合金粉末混合作为熔覆材料, 采用5 kW CO2激光进行激光熔覆。用扫描电子显微镜(SEM)和能谱仪(EDS)分析熔覆层TiBCN颗粒形貌和组织结构。激光熔覆层的TiBCN颗粒发生部分熔化, 相互连接, 自动组装成枝晶状组织; 熔覆层底部与基体金属呈冶金结合状态; 熔覆层的硬度随TiBCN含量增加而提高, 含量为90%时达到1 200 HV, 耐磨性比基体明显提高, 4 000 W激光熔覆层的硬度和耐磨性优于3 500 W。研究结果表明, TiBCN粉末是一种适合激光熔覆的新陶瓷材料, 有希望用于激光3D打印等其它激光增材制造。
Abstract
TiBCN powder was used for laser cladding of 45 steel, aiming at looking for new ceramic additive materials for additive manufacturing such as 3D printing. TiBCN powder and alloying powder were mixed as additives. A 5 kW CO2 laser was employed for laser cladding. Scanning electron microscopy(SEM)attached with energy dispersive spectrometer(EDS)was employed to analyze the morphology of TiBCN particles, microstructure and structure in laser cladding layer. TiBCN particles were partially melted and self-organized as dendrite structures. The bottom of cladding layer is metallurgically bonded with the base metal. Hardness increased with increasing amount of TiBCN. Maximum hardness of laser coated layer was up to1 200 HV at 90%. Wear resistance was improved significantly than the substrate. 4 000 W laser cladding hardness and wear resistance better than 3 500 W. The results show that TiBCN powder is an available new ceramic material not only for laser cladding also for advanced laser additive manufacturing such as laser 3D printing.
徐庆坤, 胡建东, 张文丛. TiBCN粉末45钢激光熔覆应用研究[J]. 应用激光, 2018, 38(1): 7. Xu Qingkun, Hu Jiandong, Zhang Wencong. Application of TiBCN Powder as Additive in Laser Cladding of 45 Steel[J]. APPLIED LASER, 2018, 38(1): 7.