铝合金异形曲面热喷涂涂层的制备及性能研究
Study on Preparation and Performance of Thermal Spraying Coatings onto Aluminum Alloy Abnormity Bent Surface
查看参考文献11篇
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文摘
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采用大气等离子喷涂(APS)(液态CO_2气化冷却和未冷却)和超音速火焰喷涂(HVOF),在模拟加力泵涡壳的异形铝合金工件内曲面,制备了耐气蚀性较好的3种涂层,并考察涂层和异形曲面基体的结合情况及涂层的相组成、显微硬度和孔隙率。结果表明:HVOF在其焰流无法垂直喷涂的部位涂层与基体结合较差; 未使用CO_2冷却的APS涂层卷曲,涂层中有明显裂纹; 使用CO_2冷却的APS涂层与基体结合良好,涂层中没有裂纹,该工艺是目前在铝合金异形曲面制备热喷涂涂层的有效途径。 |
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其他语种文摘
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Three types coating that had fine cavitaion erosion resistance, derived from NiCr feedstock, were fabricated on abnormity bent surface of aluminum alloy workpieces using air plasma spraying (APS) with and without cooling by gasified CO_2and high velocity oxy-fuel (HVOF). The combination between coatings and substrate, and the composition, microharness and porosity of the coatings were reviewed. The obtained results shows that HVOF sprayed coating has bad combination with substrate where the flame can't vertically sprayed on; APS sprayed coating without cooling by gasified CO_2curls and has distinct crack; APS sprayed coating cooled by gasified CO_2has good combination with substrate in anyplace and has not crack. It can be concluded that APS is an effective method to produce functional coatings on aluminum abnormal bent surface at present. |
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来源
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表面技术
,2010,39(3):67-70 【扩展库】
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关键词
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HVOF
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APS
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热喷涂涂层
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异形曲面
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地址
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中科院兰州化学物理研究所, 固体润滑国家重点实验室, 兰州, 730000
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1001-3660 |
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学科
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金属学与金属工艺 |
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基金
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国家自然科学基金创新研究群体项目
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国家973计划
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中国科学院西部之光人才培养计划
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文献收藏号
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CSCD:3901483
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