【摘要】 激光熔覆能够实现对能量和品质的精确控制,对基体的热影响小,涂层稀释率低,并与基体形成冶金结合,是目前制备涂层的常用手段。相比于块体材料,涂层的应用减少了材料的浪费,更符合环保理念。采用激光熔覆技术制备高熵合金涂层是近年来高熵合金领域的主要热点之一。由于高熵合金的"鸡尾酒效应",主元元素的选择对涂层性能起着决定性的作用。因此本文主要介绍激光熔覆制备高熵合金涂层时合金元素主元对其相形成规律以及耐磨、耐腐蚀、抗氧化等性能的影响。重点介绍了高熵合金中常用主元元素Fe、Cr、Mn、Al、Ti、Co、Ni几种金属主元和C、N、B、Si四种非金属主元的影响规律,结果表明,通过宏观和微观的合金化可以改变高熵合金相的组成及结构,从而改善材料的性能。最后还对激光熔覆高熵合金涂层的应用前景以及未来研究的方向进行了展望。更多还原

【Abstract】 Laser cladding is a widely used coating preparation method, which can realize the precise control of energy and quality, has little thermal effect on the substrate, has low coating dilution ratio, and forms metallurgical combination with the substrate. Compared with bulk materials, the application of coating reduces the waste of materials and conforms to the concept of environmental protection. In recent years, laser cladding technology is one of the main hot spots in the field of high-entropy alloy. Due to the "cocktail effect" of high-entropy alloy, the choice of main elements plays a decisive role in the coating performance. Therefore, this paper mainly introduces the influence of the main elements of alloy elements on the phase formation and the properties of wear resistance, corrosion resistance and oxidation resistance in the laser cladding of high-entropy alloy coating. This paper mainly introduces the influence rules of the main metal elements Fe, Cr, Mn, Al, Ti, Co, Ni and the four non-metal elements C, N, B, Si in the high-entropy alloy. The results show that the composition and structure of the high-entropy alloy phase can be changed by macro and micro alloying, so as to improve the properties of the material. In addition, the application prospect and future research direction of laser cladding high-entropy alloy coating are also prospected.更多还原