热处理对ECAP变形FeCoV合金组织和磁性能的影响  

The Effect of Heat Treatment on the Microstructure and Magnetic Properties of FeCoV Alloy Deformed by ECAP

作　　者：杜忠泽[1] 陈明[1] 符寒光[2] 伍来智[3] 

机构地区：[1]西安建筑科技大学冶金工程学院,西安710055 [2]西安交通大学材料科学与工程学院,西安710049 [3]上海交通大学塑性成型工程系,上海200030

出　　处：《金属材料研究》2007年第3期1-4,9,共5页Research on Metallic Materials

基　　金：国家自然科学基金（59974018）和陕西省教育厅专项基金（05JK229）资助项目介

摘　　要：研究了回火热处理对等径弯曲通道变形（Equal Channel Angular Pressing，简称ECAP）FeCoV合金组织和磁性能的影响。结果表明，FeCoV合金经4道次ECAP变形后，平均晶粒尺寸为200nm。FpCpV合金的ECAP变形试样经回火后都有碳化物颗粒和纳米尺度析出相的析出过程存在。其析出过程为；首先在原来的等轴亚晶晶界和板条晶界上析出大的碳化物颗粒，随着析出过程的进行，大的碳化物颗粒发生分化现象，析出更小的碳化物颗粒，最终析出纳米尺度的析出相。已经析出的纳米尺度析出相随着回火温度的升高会发生长大现象，且原来的晶界随着析出的进行逐渐消失。另外，随回火温度的升高，各磁性能参数呈波浪式变化。The effect of tempering heat treatment on the microstructure and magnetic properties of FeCoV alloy deformed by Equal Channel Angular Pressing （ECAP） has been investigated. The results showed that the pressing surface of FeCoV alloy transformed into the equiaxed subgrain whose dimension was 200 nm after four passes of ECAP. FeCoV alloy deformed by four passes of ECAP would produce the precipitation of nanocrystal after tempering. The process of precipitation was as follows： Firstly, some big carbide particles separa- ted from the boundary of equiaxial subgrain and thin lath. The fine carbide and nanophase separated from the big carbide particles. With the proceeding of precipitation, the proportion of nanophase increased. The phenomena that the nanophase grew up would appear when the tempering temperature increased. Moreover, the change of the magnetic performance of Fe- CoV alloy is very sensitive to the change of tempering temperature.

关 键 词：FeCoV合金 ECAP变形 显微组织 磁性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程]