摘要
以热作模具钢H13为基体,通过激光熔覆在其表面制备了Al_(0.8)CoCr_(0.23)FeNi_(x)W(x=0,0.25,0.5,0.75,1)高熵合金涂层,并研究Ni对组织结构及其热稳定性和耐磨性影响。结果发现Al_(0.8)CoCr_(0.23)FeNi_(x)W高熵合金组织结构随Ni元素的添加发生结构变化,Ni的添加促进μ-Fe7W6相生成,起到弥散强化作用,提高涂层的硬度及其耐磨性。在800℃保温后测试其涂层的稳定性,结果表明Al_(0.8)CoCr_(0.23)FeNi_(x)W高熵合金涂层均有较高的硬度和耐磨性,8 h保温后硬度(HV)仍高于500。
Taking hot work die steel H13 as substrate,Al_(0.8)CoCr_(0.23)FeNi_(x)W(x=0,0.25,0.5,0.75,1) high entropy alloy coating was prepared on the surface of H13 steel by laser cladding,and effects of Ni addition on microstructure,thermal stability,and wear resistance were investigated.The results indicate that the microstructure of Al_(0.8)CoCr_(0.23)FeNi_(x)W high entropy alloy is transformed with Ni addition.Ni promotes the formation ofμ-Fe_7W_6 phase,which plays a role of dispersion strengthening,enhancing the hardness and wear resistance of the coating.The stability of the coating is tested after holding at 800℃.The results reveal that the Al_(0.8)CoCr_(0.23)FeNi_(x)W high entropy alloy coating exhibits desirable hardness and wear resistance,and the hardness remains higher than 500 HV after holding for 8 h.
作者
单华亮
陶美悦
庄文晨
曹志强
Shan Hualiang;Tao Meiyue;Zhuang Wenchen;Cao Zhiqiang(Key Laboratory of Solidification Control and Digital Preparation Technology(Liaoning Province),Dalian University of Technology,Dalian 116024;Ningbo Institute of Dalian University of Technology,Ningbo 315016)
出处
《特种铸造及有色合金》
CAS
北大核心
2024年第4期546-550,共5页
Special Casting & Nonferrous Alloys
基金
国家重点研发计划资助项目(2018YFE0306103)
国家自然科学基金资助项目(52271024)
宁波市重大科技专项基金资助项目(2018B10030)。
关键词
热作模具钢
高温磨损
高熵合金
Hot Working Die Steel
High Temperature Wear
High Entropy Alloy
