ECAP变形2J4合金的显微组织和磁性能  

Microstructures and magnetic properties of 2J4 alloy deformed by ECAP

作　　者：杜忠泽[1] 魏法明[1] 符寒光[2] 伍来智[1] 王经涛[1] 

机构地区：[1]西安建筑科技大学冶金工程学院,西安710055 [2]北京工业大学材料学院,北京100022

出　　处：《吉林大学学报（工学版）》2008年第2期303-308,共6页Journal of Jilin University:Engineering and Technology Edition

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

摘　　要：研究了等径弯曲通道变形(ECAP)对2J4合金显微组织和磁性能的影响。结果表明,2J4合金在室温下经A方式的ECAP变形后,组织明显细化,原有的奥氏体区部分转变为马氏体,且变形量越大,马氏体的质量分数越多。ECAP变形试样具有比冷轧试样更优异的磁滞性能,表现为更高的矫顽力、剩磁及更大的磁能积。ECAP变形为制备利用率高、成本低的高性能磁性材料提供了一种新途径。The influence of Equal Channel Angular Pressing （ECAP） deformation on the microstructure and magnetic properties of a semi-magnetic alloy, 2J4, was studied. In the process, the sample is pressed from one pass to the next pass directly without rotation. Results show that the microstructures of 2J4 alloy deformed by ECAP at room temperature are obviously refined. Part of original austenite transforms into martensite, the larger the deformation, the higher the transformation fraction of martensite. The magnetic retardation performance of the specimen deformed by ECAP is better than that deformed by cold rolling with similar deformation. It has higher coercive force （Hc）, remanence （Br） and larger magnetic energy （Pro）. ECAP deformation is new approach for fabricating high performance magnetic materials with high material utilization and low production cost.

关 键 词：材料合成与加工工艺 等径弯曲通道变形 2J4合金 马氏体 细化 磁性能 

分 类 号：TG132.2[一般工业技术—材料科学与工程] TG376[金属学及工艺—合金]