论文部分内容阅读
利用超音频感应熔覆技术在Q235钢表面制备了厚度超过5.5 mm的镍基合金涂层,借助SEM/EDS、XRD、显微硬度计和球盘式摩擦磨损试验机研究了涂层微观组织结构、显微硬度分布及耐磨性能。结果表明,涂层主要由γ-Ni,γ-Ni/Ni3Si,硼化物Cr B和碳化物Cr7C3组成;涂层显微硬度呈现梯度分布,平均硬度为795 HV0.2,近4倍于基体硬度;涂层相对耐磨性能为基体的5.77倍;基体的磨损机制主要为严重的磨粒磨损,涂层的主要磨损机制为轻微粘着磨损,涂层中均匀分布大量的硬质相是耐磨性能显著提高的主要原因。
The microstructure of the coating was studied by SEM / EDS, XRD, microhardness tester and ball-and-disc friction and wear tester with super-frequency induction cladding technique on the surface of Q235 steel. , Microhardness distribution and wear resistance. The results show that the coating mainly consists of γ-Ni, γ-Ni / Ni3Si, boride Cr B and carbide Cr7C3. The microhardness of the coating presents a gradient distribution with an average hardness of 795 HV0.2, ; The relative wear resistance of the coating is 5.77 times that of the matrix; The wear mechanism of the matrix is mainly abrasive wear, the main wear mechanism of the coating is slight sticking wear, the coating is uniformly distributed a large number of hard phase is wear resistance Significantly increased the main reason.