铜的掺杂方式对铁基合金液相分离组织均匀性的影响  

Effect of copper-dopingmethod on the homogenization of the structure from liquid phase separation in iron-based alloys

作　　者：邢晓玉 高丽平 王伟 朱华林 朱兴治 黄贞益 XING Xiaoyu;GAO Liping;WANG Wei;ZHU Hualin;ZHU Xingzhi;HUANG Zhengyi(School of Metallurgical Engineering,Anhui University of Technology,Ma’anshan 243000,Anhui,China;Anhui Low-Carbon Metallurgy and Process Control Engineering Research Center,Ma’anshan 243000,Anhui,China)

机构地区：[1]安徽工业大学冶金工程学院,安徽马鞍山243000 [2]安徽省低碳冶金与流程控制工程研究中心,安徽马鞍山243000

出　　处：《金属功能材料》2024年第5期46-56,共11页Metallic Functional Materials

基　　金：安徽省重大产业创新计划(AHZDCYCX-LSDT2023-01)。

摘　　要：采用化学镀和机械混合的方式制备了Cu质量分数为5%的铁基复合粉末。通过SEM、XRD、DSC和热力学计算相结合的方式,研究了复合粉末的结构特征及其合金化过程中的液相分离组织均匀性及相转变特征。结果表明:化学镀制备的复合粉末具有均匀核-壳结构特征,与机械混合粉末相比,其在合金化过程中出现了更明显的液相分离现象,形成了多量富铁基熔体和少量富铜熔体,在随后冷却到室温时形成了ε-Cu更加均匀的分布于铁基合金基体的组织。Iron-based composite power with 5%of Cu was prepared by both electroless plating and mechanical mixing methods.The microstructure of the composite powder,the homogenization of the structure from liquid phase separation during the alloying process and the characteristic of phase transition were evaluated by combining methods as SEM,XRD,DSC with thermodynamic calculations.The results show that the composite powder prepared by electroless plating indicated the remarkable characteristics of core-shell structure,and,comparing with the powder prepared by mechanical mixing,the liquid phase separation phenomenon was more obvious during the alloying process,and eventually formed a large amount of iron-rich melt with a little copper-rich melt.And during the cooling process,the structure ofε-Cu showed more uniformly distributed in the iron-based alloy matrix.

关 键 词：铁基合金粉末 化学镀铜 机械混合 液相分离 

分 类 号：TG174.4[金属学及工艺—金属表面处理]