引用本文:黄祖凤， 张冲， 唐群华， 戴品强， 吴波.WC颗粒对激光熔覆FeCoCrNiCu高熵合金涂层组织与硬度的影响[J].中国表面工程,2013,26(1):13~19
HUANG Zu-feng, ZHANG Chong, TANG Qun-hua, DAI Pin-qiang,WU Bo.Effects of WC Particles on the Microstructure and Hardness of FeCoCrNiCu High-entropy Alloy Coating Prepared by Laser Cladding[J].China Surface Engineering,2013,26(1):13~19
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WC颗粒对激光熔覆FeCoCrNiCu高熵合金涂层组织与硬度的影响
黄祖凤， 张冲， 唐群华， 戴品强， 吴波1,2
1.福州大学 材料科学与工程学院， 福州 350108;2.福建工程学院 材料科学与工程学院， 福州 350108
摘要:
采用CO2横流激光器制备添加WC颗粒的FeCoCrNiCu高熵合金涂层，研究WC含量对涂层的组织结构及硬度的影响。结果表明：不同WC含量的高熵合金涂层均由简单的面心立方结构（FCC）和体心立方结构（BCC）两相组成。随着WC含量的提高，涂层中FCC相含量不断减少，BCC相含量不断增加。WC颗粒在激光熔覆过程中发生溶解并完全溶入FCC相和BCC相中，并未引起复杂碳化物相的生成。不同WC含量的涂层均为树枝晶组织。激光熔覆过程中的快速凝固条件有利于抑制枝晶和枝晶间的成分偏聚。WC含量的提高使枝晶细化，硬度提高。
关键词:  高熵合金  涂层  激光熔覆  WC颗粒
DOI：
分类号:
基金项目:福建省自然科学基金（2012J01202）； 国家自然科学基金（51171046, 50971043）； 福建省高校产学合作重大项目(2010H60001)
Effects of WC Particles on the Microstructure and Hardness of FeCoCrNiCu High-entropy Alloy Coating Prepared by Laser Cladding
HUANG Zu-feng, ZHANG Chong, TANG Qun-hua, DAI Pin-qiang,WU Bo1,2
1. College of Materials Science and Engineering, Fuzhou University, Fuzhou 350108;2. Department of Materials Science and Engineering, College of Fujian University of Technology, Fuzhou 350108
Abstract:
FeCoCrNiCu high-entropy alloy coating with WC particles was prepared by the continuous wave CO2 laser. The effects of WC particles on the microstructure and hardness were investigated. Results show that the high entropy alloy coatings with different WC content are all composed of face-centered cubic (FCC) and body-centered cubic (BCC) solid solution phases. With the increase of WC content, BCC phase content increases and FCC phase content decreases. During the process of laser cladding, WC particles dissolved into the FCC and BCC phases, however, the addition of WC does not cause the formation of complex carbide phases. The microstructure of coatings with different WC content is typical dendrite. Element segregation between the dendrite and interdendrite can be effectively inhibited by laser cladding with rapid solidification. The increase of WC content lead to grain refinement and microhardness increasing.
Key words:  high-entropy alloy  coating  laser cladding  WC particles
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