论文部分内容阅读
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。
In order to improve the wear resistance of the toothed part, a non-cracked Ni / WC composite coating with WC content up to 80% was prepared on a 45 # steel substrate by using a semiconductor laser and selecting a specific Ni-based alloy as a binder. The composite coatings were characterized by SEM, EDS and XRD. The results show that the composite coating has a uniform and compact structure, WC hard particles are uniformly distributed in the coating, and form carbides with Ni-based alloying elements, which are gathered around the WC particles or are free from the coating. The composite coating mainly consists of WC and W2C hard phase, γ-Ni, M7C3 and M23C6.