超音速等离子喷涂制备水力机械耐冲蚀涂层的研究

发布时间：2018-08-13 20:22

【摘要】：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 210HV0.2,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。
[Abstract]:The new supersonic plasma spraying system of SQC-100 not only has the high speed and coating density of HVOF, but also has the high deposition efficiency of plasma, which can effectively reduce the cost under the premise of ensuring the coating quality. SQC-100 type supersonic plasma spraying technology was used to spray WC-10Co-4Cr coating and its erosion resistance was studied. The results show that the porosity is 0.77, the hardness is 1.210 HV0.2, the bonding strength is 72 MPA, and the coating properties are basically the same level as the supersonic flame spraying. In addition, the coating has good erosion resistance, the erosion resistance of the coating is 3.88 times that of ZG0Cr13Ni4Mo stainless steel, and the internal cracks of the coating are mainly propagated in the form of transgranular fracture. The results show that WC-10Co-4Cr coating has a wide application prospect in hydraulic machinery parts in high sediment flow.
【作者单位】：水利机械及其再制造技术浙江省工程实验室;水利部产品质量标准研究所;水利部杭州机械设计研究所;
【基金】：国家“948”资助项目(201218) 浙江省公益性资助项目(2013C31044) 浙江省科技计划资助项目(2014C31156)
【分类号】：TG174.4;TK730.3

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