2Cr13不锈钢激光熔覆涂层的性能

Performance of 2Cr13 Stainless Steel Laser Cladding Coating

激光熔覆作为一种新的表面强化技术被广泛应用于再制造领域,采用激光熔覆工艺在2Cr13不锈钢基体上制备了Ni基耐磨涂层,并通过光学显微镜、场发射扫描电镜以及能谱分析、摩擦磨损研究了熔覆层的性能。结果表明,熔覆层主要以树枝状晶为主;在熔覆层中含有大量Cr元素,说明在熔覆过程中,产生了富Cr相,这些相对于提高熔覆层表面硬度非常有利。熔覆层最高硬度可达566.7 HV0.05,是基体硬度的1.9倍。因此,激光熔覆工艺可被用于提高零件表面硬度及耐磨性。

As a novel surface strengthening technology, laser cladding is widely used in remanufacture filed. Ni-based wear resistance layers were prepared on 2Cr13 stainless steel matrix by laser cladding technique. Optical microscope, field emission scanning electron microscopy （with EDS） and frictional wear methods were used to research the properties of the cladding layers. The results show that dendrites crystal is mainly crystal type in the cladding layer. Lots of Cr element exist in cladding layer, which means that rich Cr phase generates during the cladding process, and the phases are benefit for improving the hardness of the cladding layer. The hardness of the cladding layer is 566.7 HV0.05, which is 1.9 times higher than the matrix. So, the laser cladding technology can be used in enhancing the surface hardness and wear resistance of the parts.