SQC-100新型超音速等离子喷涂系统既有HVOF的高速度和涂层致密性,又有等离子的高沉积效率,能够在保证涂层质量的前提下有效降低成本.采用SQC-100型超音速等离子喷涂技术喷涂WC-10Co-4Cr涂层,并研究其耐冲蚀性能.结果表明,孔隙率为0.77%,硬度为1 210 HV0.2,结合强度达到72 MPa,涂层性能基本达到超音速火焰喷涂同等水平.此外,获得的涂层具有良好的耐泥沙冲蚀性能,涂层耐冲蚀性是ZG0Cr13Ni4Mo不锈钢的3.88倍,并研究了涂层内部裂纹主要以穿晶断裂形式扩展.研究表明WC-10Co-4Cr涂层在高含沙水流中的水力机械零部件领域有广泛的应用前景.
The advanced SQC-100 supersonic plasma spraying system has both high speed of HVOF, and deposition efficiency of APS, and it can effectively reduce the cost of the coating under the premise of quality assurance.In this study, SQC-100 supersonic plasma spraying technique will be used to spray WC-10Co-4Cr coating, and study its erosion resistance.The results showed that: the porosity is 0.77%, hardness is 1 210 HV0.2, binding strength is 72 MPa.Coating performance basically reached HVOF the same level.In addition, the obtained coating has good resistance to erosion and sediment properties, erosion Resistance of coating is 3.88 times than ZG0Cr13Ni4Mo stainless steel.The ductile trancrystalline fracture is the main propagating mode of cracks in the coating.WC-10Co-4Cr coating has a wide range of applications of hydraulic machinery parts in the field of high sediment-laden flow.
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