| Stellite-6对激光熔覆MoSi_2涂层裂纹敏感性的影响 |
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| 引用本文： | 梁泽芬,王国宇,易湘斌,林小军,王亮.Stellite-6对激光熔覆MoSi_2涂层裂纹敏感性的影响[J].材料保护,2017(12):42-45,73. |
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| 作者姓名： | 梁泽芬 王国宇 易湘斌 林小军 王亮 |
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| 作者单位： | 1. 兰州工业学院机电工程学院,甘肃兰州,730050;2. 兰州市农业技术推广研究中心,甘肃兰州,730000 |
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| 基金项目： | 甘肃省高等学校科研资助项目，甘肃省科技支撑计划立项项目 |
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| 摘 要： | 为了降低激光熔覆MoSi_2涂层的裂纹敏感性,在MoSi_2粉末中加入不同含量的Stellite-6粉末对304不锈钢进行激光熔覆。利用光学显微镜、扫描电镜、X射线衍射仪等研究了Stellite-6加入量以及工艺参数对涂层裂纹敏感性的影响。结果表明:通过在纯MoSi_2粉中添加Stellite-6合金粉,可以增加涂层韧性相,改善涂层组织,降低涂层裂纹敏感性;当Stellite-6添加量为20%(质量分数)时,可以得到结合良好、无裂纹的涂层;在不影响涂层性能的前提下,较大的稀释率也能有效降低涂层裂纹敏感性。
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| 关 键 词： | 激光熔覆 MoSi2涂层 裂纹敏感性 Stellite-6 稀释率 304不锈钢 |
Influence of Stellite-6 Content on Crack Sensitivity of MoSi2 Coating Prepared by Laser Cladding |
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| Abstract: | In order to decrease the crack sensitivity of MoSi2 coating prepared by laser cladding,304 stainless steel was laser cladded with adding different dosages of Stellite-6 powders into MoS2 powders.The effect of Stellite-6 content on crack sensitivity of the coating was studied by optical microscope,scanning electronic microscope and X-ray diffractometer.Results showed that adding Stellite-6 alloy powders could increase the ductile phase of coating,improve the microstructure of coating and reduce the crack sensitivity of coating.When the content of Stellite-6 was 20％(mass fraction),the obtained coating without cracks had good combination with the substrate.Besides,a higher dilution rate also could reduce the crack sensitivity of coating,without affecting other coating properties. |
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| Keywords: | laser cladding MoSi2 coating crack sensitivity Stellite-6 dilution rate 304 stainless steel |
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