电子束熔丝沉积Mo‑Fe双金属制备工艺与性能研究  

Preparation technology and properties of Mo-Fe bimetals deposited by electron beam freeform fabrication

作　　者：李丹妮 姚正军[1,2] LI Danni;YAO Zhengjun(College of Materials Science and Technology,Nanjing University of Aeronautics and Astronau-tics,Nanjing 211106,China;Key Laboratory of Materials Preparation and Protection for Harsh Environment,Ministry of Industry and Information Technology,Nanjing 210016,China)

机构地区：[1]南京航空航天大学材料科学与技术学院,江苏南京211106 [2]面向苛刻环境的材料制备与防护技术工业和信息化部重点实验室,江苏南京210016

出　　处：《现代交通与冶金材料》2023年第5期83-87,94,共6页Modern Transportation and Metallurgical Materials

基　　金：国家自然科学基金资助项目(51975286)。

摘　　要：电子束熔丝沉积技术由于所制备的材料具有晶粒细小、致密度高、综合力学性能好等诸多优点得到广泛应用。以TZM钼合金为基体,采用电子束为热源在基体表面沉积304不锈钢,制备Mo‑Fe双金属材料,并研究电子束熔丝沉积工艺参数对双金属显微组织、熔合线元素分布、硬度及耐磨性的影响。试验结果表明:不同工艺参数下,钼合金与304不锈钢双金属结合良好;随热输入的增加,材料显微硬度和耐磨性能显著提高。当电子束束流为33 mA,送丝速度为1600 mm/min,行进速度为150 mm/min时,所得样品组织最为精细、硬度最高(503 HV)、耐磨性能最好。Electron beam freeform fabrication technology has been widely used because of the advantages of fine grain size,high density and good comprehensive mechanical properties.In this paper,304 stainless steel is deposited on the surface of TZM molybdenum alloy by electron beam as heat source to prepare Mo-Fe bimetallic material.The effects of electron beam freeform fabrication process param‑eters on bimetallic microstructure,fusion line element distribution,hardness and wear resistance are studied.The results show that under different process parameters,molybdenum alloy and 304 stainless steel are well bonded.With the increase of heat input,the microhardness and wear resistance of the material are significantly improved.In this research,when the electron beam current is 33 mA,the wire feeding speed is 1600 mm/min,and the travel speed is 150 mm/min,the obtained sample has the finest microstructure,the highest hardness(503 HV),and the best wear resistance.

关 键 词：电子束熔丝沉积 Mo‑Fe双金属 显微组织 硬度 耐磨性能 

分 类 号：TG14[一般工业技术—材料科学与工程]