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首页> 外文会议>International Conference on Advanced Engineering Materials and Technology >Research on Friction and Wear Properties of Plasma Spraying Ni-base Alloy Coatings on Aluminum Alloy Surfaces
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Research on Friction and Wear Properties of Plasma Spraying Ni-base Alloy Coatings on Aluminum Alloy Surfaces

机译：铝合金表面上等离子体喷涂Ni基合金涂层摩擦磨损性能研究

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摘要

In order to improve the wear resistance and extend service life of aluminum alloy parts, the Ni-base alloy anti-wear coatings were prepared on the surfaces of 7A05 aluminum alloy by plasma spraying technology. The microstructure and interface of the coatings were analyzed, and the friction and wear properties of Ni-base alloy coatings and aluminum alloy substrates were investigated under dry friction condition at room temperature. The research results show that the main phases of Ni-base alloy coating are γ-Ni, CrB and Cr_(23)C_6. The thicknesses of diffusion layers existing between intermediate layer and coating, intermediate layer and substrate are respectively 15μm and 20μm. The bonding types of the coating and the substrate are mechanical combination accompanied with partially metallurgical combination. When wore against GCr15 steel balls, the average friction coefficient of the Ni-base alloy coatings is 11.6% lower than that of the aluminum alloy substrates, and the average wear loss of the former is 9.3mg, which is only 1/3 of that of the latter. With the increase of loads, the wear mechanisms of the Ni-base alloy coatings change from slightly micro-cutting wear and fatigue wear to abrasive wear and micro-fracture wear, while those of the aluminum alloy substrates are mainly adhesive wear and abrasive wear as well as slight oxidation wear.
机译：为了提高耐磨性和延长铝合金零件的使用寿命，通过等离子喷涂技术在7a05铝合金的表面上制备Ni-Bimal合金抗磨涂层。分析了涂层的微观结构和界面，在室温下在干摩擦条件下研究了Ni-Bim合金涂层和铝合金基质的摩擦和磨损性能。研究结果表明，Ni碱基合金涂层的主要相是γ-Ni，CrB和Cr_（23）C_6。存在在中间层和涂层，中间层和基板之间的扩散层的厚度分别为15μm和20μm。涂层和基材的粘合类型是伴有部分冶金组合的机械组合。当对GCR15钢球佩戴时，Ni碱基合金涂层的平均摩擦系数比铝合金基材的平均摩擦系数低11.6％，前者的平均磨损损失为9.3mg，只有1/3后者。随着载荷的增加，镍基合金涂层的磨损机构从略微微切的磨损和疲劳磨损变为磨料磨损和微骨折磨损，而铝合金基板的磨损件主要是粘合剂磨损和磨料磨损以及轻微的氧化磨损。

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