FeCoV合金ECAP变形和回火组织  

Equal Channel Angular Pressing and Tempering Structures of FeCoV Alloy

作　　者：杜忠泽[1] 伍来智[2] 符寒光[3] 王经涛[4] 

机构地区：[1]西安建筑科技大学,陕西西安710055 [2]上海交通大学,上海200030 [3]西安交通大学,陕西西安710049 [4]南京理工大学,江苏南京210049

出　　处：《稀有金属材料与工程》2008年第8期1373-1376,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(59974018);陕西省教育厅专项基金(05JK229)

摘　　要：在室温下成功实现了FeCoV合金A方式的等径弯曲通道变形(equalchannelangularpressing,简称ECAP),并研究了变形后的显微组织以及回火处理对FeCoV合金ECAP变形显微组织的影响。结果显示,FeCoV合金经ECAP变形后,形成细小的板条状组织,且尺寸明显减小,由0.40μm减小至90nm。板条内有位错缠结现象。随着ECAP变形道次的增加,细板条发生断裂。4道次ECAP变形FeCoV合金回火后的组织仍为板条组织,板条内有碳化物颗粒和纳米尺度析出相存在。The equal channel angular pressing （ECAP） of FeCoV alloy was successfully carried out at room temperature with route A, in which the sample was not rotated after pressing one pass and entering directly the next pass. The microstructure of FeCoV alloy after ECAP and the effect of tempering treatment on the microstructure of ECAP FeCoV alloy were investigated by means of the Transmission Electron Microscopy （TEM）. The results showed that the ECAP results in the structure refinement in FeCoV alloy, in which the average width of the lath is reduced from 0.40 μm to 90 nm after four passes ECAP. There is a phenomenon of dislocation tangle in the lath. As the ECAP pass increases, the rupture of the lath in the microstructure will appear. The microstructure after tempering via four passes ECAP is still the lath in which there are some carbide grains and precipitated phases in nanometer.

关 键 词：等径弯曲通道变形 FeCoV合金 回火 细化 板条组织 

分 类 号：TG113[金属学及工艺—物理冶金]