应用激光, 2015, 35 (2): 176, 网络出版: 2015-05-20
高WC含量Ni基合金激光熔覆及齿形零件的组合制造研究
Laser Clad of Ni/WC Composite Coating with High WC Content and Combination Remanufacturing of Tooth-like Components
摘要
为了提高齿形零件的耐磨性能, 采用半导体激光器, 选择特定的Ni基合金作为粘结剂, 在45#钢基体上制备了WC质量分数高达80%的无裂纹Ni/WC复合涂层。通过扫描电镜(SEM)、能谱分析(EDS)和X射线衍射仪(XRD)对复合涂层进行组织和相结构分析。结果表明, 复合涂层组织均匀致密, WC硬质颗粒均匀分布在涂层中, 并且与Ni基合金元素形成多种碳化物, 聚集在WC颗粒周围或游离于涂层中。复合涂层主要由WC和W2C硬质相、γ-Ni、M7C3和M23C6等组成。
Abstract
In order to improve the wear resistance of tooth-like components, Choosing specific Nickel-based alloy powder as binder materials, high WC content of Ni/WC composite coatings without cracks were prepared on 45 carbon steel by high-power semiconductor laser, the mass fraction of WC particles in coatings could reach as high as 80%. The microstructure and phase constitution of the coating were studied with SEM, EDX and X-ray analysis techniques. The results revealed that the composite coating is uniform and dense in microstructure, the WC particles distributed homogeneously in the coating. In addition, Kinds of carbonizations formed from the reaction of WC particles and Ni-base alloy, which were gather around the WC particles or distribute freely in the cladding layer. The composite coating contains WC、W2C、γ-Ni、M7C3and Cr23C6 phases.
董刚, 郁伟, 陈智君, 张群莉, 叶钟, 姚建华. 高WC含量Ni基合金激光熔覆及齿形零件的组合制造研究[J]. 应用激光, 2015, 35(2): 176. Dong Gang, Yu Wei, Chen Zhijun, Zhang Qunli, Ye Zhong, Yao Jianhua. Laser Clad of Ni/WC Composite Coating with High WC Content and Combination Remanufacturing of Tooth-like Components[J]. APPLIED LASER, 2015, 35(2): 176.