不同喷涂方法制备马氏体不锈钢涂层组织性能对比

Microstructure and properties of martensite stainless steel coating by different spraying methods

摘要: 采用电热爆炸定向喷涂和高速电弧喷涂技术,分别制备了3Cr13不锈钢涂层。使用扫描电子显微镜(SEM)、X射线能谱仪(EDAX)、X射线衍射仪(XRD)和纳米压痕仪等分析了两种涂层的组织形貌、元素分布、相结构、纳米硬度和弹性模量等。结果表明,电热爆炸定向喷涂层比高速电弧喷涂层更致密;前者氧化现象不明显,而后者较明显;前者与基体主要是冶金结合,而后者主要为机械结合;前者的纳米硬度和弹性模量分别达到了10.3GPa和237.8GPa,高于后者的7.6GPa和183.3GPa。

Abstract: The mantensite stainless steel coatings were prepared on substrate of AISI 1045 steel with the electro-thermal explosion directional spraying (EEDS) technology and high velocity arc spraying (HVAS)technology. The microstructure, element distributions, phases, hardness and elastic modulus were analysed by means of scanning electronic microscopy (SEM), energy-dispersive X-ray spectroscopy (EDAX), X-ray diffraction (XRD)and nano-tester, respectively.Results showed that the coatings of EEDS are more compact than that of HVAS, and EEDS coatings possess higher nano-hardness and plastic modulus. The bond of EEDS coatings is a metallurgical bond, but that of HVAS coatings is a mechanical one.