H13钢表面激光熔覆Al0.8CoCr0.23FeNixW高熵合金涂层及其性能
Microstructure and Properties of Laser Cladding Al0.8CoCr0.23FeNixW High Entropy Alloy Coating on H13 Steel
单华亮 1陶美悦 1庄文晨 1曹志强2
作者信息
- 1. 大连理工大学辽宁省凝固控制与数字化制备技术重点实验室,大连 116024
- 2. 大连理工大学辽宁省凝固控制与数字化制备技术重点实验室,大连 116024;大连理工大学宁波研究院,宁波 315016
- 折叠
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Al0.8CoCr0.23FeNixW(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Al0.8CoCr0.23FeNixW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Al0.8CoCr0.23FeNixW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.
Abstract
Taking hot work die steel H13 as substrate,Al0.8CoCr0.23FeNixW(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 Al0.8CoCr0.23FeNixW high entropy alloy is transformed with Ni addition.Ni promotes the formation of μ-Fe7W6 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 Al0.8CoCr0.23FeNixW high entropy alloy coat-ing exhibits desirable hardness and wear resistance,and the hardness remains higher than 500 HV after holding for 8 h.
关键词
热作模具钢/高温磨损/高熵合金Key words
Hot Working Die Steel/High Temperature Wear/High Entropy Alloy引用本文复制引用
基金项目
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)
出版年
2024
NETL
NSTL
万方数据