局域气氛下电接触瞬态热源表面强化新设备研究  

A New Surface Hardening Device for Prolonging Life of Forging Die

作　　者：李庆华[1] 李付国[1] 娄路亮[1] 刘军 

机构地区：[1]西北工业大学材料科学与工程系,陕西西安710072

出　　处：《西北工业大学学报》2000年第4期649-652,共4页Journal of Northwestern Polytechnical University

基　　金：航空自然科学基金 !(98BX0 40 5 );陕西省自然科学基金 !(97CS0 40 2 )资助

摘　　要：根据锻模的损伤机理 ,针对模具的高寿命和良好的抗磨损要求 ,提出了一种局域气氛下电接触瞬态热源表面强化新工艺 ,并设计了一台用于材料表面强化的新设备。应用该设备对典型热锻模材料进行表面强化处理 。One headache of many Chinese factories is the much too short life of forging die. We propose a new surface hardening device for prolonging its life. Figs.1, 2, and 3 show how our proposed device works. At any moment, the moving roller electrode is only in contact with a very localized portion of the substrate specimen. Resistive heating creates a thin hardened layer under localized inert atmosphere out of the localized portion of the substrate specimen in contact. Synchronous motion of the roller and substrate specimen provides a hardened thin layer over the entire substrate specimen. The device worked quite well in the laboratory. We need to make some improvements before trying it out in the actual production.

关 键 词：热锻模 局域气氛 电接触加热 表面强化 

分 类 号：TG156.7[金属学及工艺—热处理] TG162.41[金属学及工艺—金属学]