Uniformly Dispersed Carbide Reinforcements in the Medium-Entropy High-Speed Steel Coatings by Wide-B

• 作 者: Bang Dou Hui Zhang Jia-Hao Zhu Ben-Qi Xu Zi-Yi Zhou Ji-Li Wu
• 机 构: Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials (Ministry of
• 出 处: 金属学报（英文版）
• 发表日期: 2020年8期
• 关键词: High-speed steel Medium-entropy alloy Phase selection Laser cladding

A medium-entropy high-speed steel (ME-HSS) coating with the 76 at.％ of Fe and multiple alloying elements was prepared by the wide-band laser cladding.Compared with the commercial W6Mo5Cr4V2 (M2) HSS coating which contains a large number of network lamellar M2C-type carbides along the grain boundaries,the presented ME-HSS coating has a high quantity of finer and more uniformly dispersed MC-type carbides;on the other hand,the coating has less retained austenite and much lower brittleness as well as similar secondary hardening effect and tempering hardness.