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。
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.
出处
《中国表面工程》
EI
CAS
CSCD
北大核心
2013年第1期13-19,共7页
China Surface Engineering
基金
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)
关键词
高熵合金
涂层
激光熔覆
WC颗粒
high- entropy alloy
coating
laser cladding
WC particles
作者简介
黄祖风（1988-），男（汉），福建霞浦人，硕士生；研究方向：新型金属材料
