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为了研究稳态磁场对激光熔注硬质颗粒强化涂层显微组织和性能的影响,在316L不锈钢基体上制备了碳化钨(WC)颗粒分布可控的强化涂层。借助扫描电子显微镜(SEM),能谱仪(EDS)和X射线衍射仪(XRD)等表征手段对激光熔注层进行微观组织和物相分析,利用维氏硬度计测试了激光熔注涂层截面显微硬度分布,通过摩擦磨损实验研究复合涂层的磨损性能。结果表明,熔注涂层物相主要由γ(Fe-Ni)固溶体、WC、W2C和Fe3W3C组成。在稳态磁场辅助下,涂层的平均硬度为510HV0.3;涂层的摩擦系数为0.7,较未添加稳态磁场的涂层降低了30%,耐磨性能得到明显改善。
In order to study the effect of steady-state magnetic field on the microstructure and properties of laser-welded hard particle reinforced coatings, a toughening coating with controllable tungsten carbide (WC) particle distribution was prepared on a 316L stainless steel substrate. The microstructure and phase analysis of the laser cladding layer were characterized by scanning electron microscopy (SEM), energy dispersive spectrometer (EDS) and X-ray diffraction (XRD). The laser cladding layer The distribution of microhardness of the cross section was studied by means of friction and wear test. The results show that the coating phase mainly consists of γ (Fe-Ni) solid solution, WC, W2C and Fe3W3C. With the help of steady-state magnetic field, the average hardness of the coating is 510HV0.3; the coefficient of friction of the coating is 0.7, which is 30% lower than the coating without the steady-state magnetic field, and the wear resistance can be obviously improved.