ECAP变形2J4合金回火后的磁性能研究

Study of Magnetic Properties of 2J4 Alloy Deformed by Equal Channel Angular Pressing after Tempering

研究了磁性材料2J4合金经等径弯曲通道变形(Equal Channel Angular Pressing,简称ECAP)和不同温度回火后的磁性能,并与冷轧变形合金的磁性能进行了对比分析。结果表明,2J4合金随着ECAP变形道次的增加,磁导率增加,4道次ECAP变形的饱和磁感应强度最高。另外,2J4合金的磁性能对回火温度的变化非常敏感,呈波浪式变化。4道次ECAP变形2J4合金沿挤压面(S面)进行85%冷轧变形,在610℃回火后获得的磁性能最好,矫顽力达到3.8364 kA/m。ECAP变形2J4合金沿挤压面的磁性能远优于传统冷轧合金。试验结果证实了采用ECAP变形方式制备高性能磁性材料是可行的。

The magnetic properties of 2J4 alloy deformed by the equal channel angular pressing （ECAP） have been studied in different tempering temperature, and were contrasted with those of the cold rolling 2J4 alloy. The results shows that the more the ECAP deformation extent is, the better the magnetic permeability of 2J4 alloy will be, the relation between them is the positive pertinence. The saturation magnetic flux density of 2J4 alloy is the best after four passes ECAP. Moreover, the change of the magnetic performance of 2J4 alloy is very sensitive to the change of tempering temperature. The best magnetic retardation performances are found in the 2J4 alloy, which is rolled with a deformation amount of 85% , along the extruding direction after four passes ECAP deformation. Its coercive force reaches 3. 8364 kA/m. The magnetic retardation performance of ECAP 2J4 alloy is better than that of traditional cold rolling 2J4 alloy. The results favors that the fabrication of high performance magnetic material by means of ECAP is feasible.