Effect of temperature increase during plastic deformation on ferromagnetic property of composite magnetic material

摘要

In press-forming of ferromagnetic/nonmagnetic composite material,an effective process forde-terming ferromagnetic property was developed was developed using deformation-induced martensitic transformation.In a fixed-temperature compression test,the incidence of deformation-induced martensite was investigated,and measured values were expressed as a sigmoid function.The sigmoid function was introduced into the FEM analysis.During the ironing process,the distribution of effective strain,the distribution of working temperature and the incidence of deformation-induced martensite were calculated,and the ferromagnetic level was predicted to correspond to the incidence of deformatinon-induced martensite.Based on this experimental assessment,drawing was quite effective for obtaining strong ferromagnetic property compared to ironing.A magnetic flux density B4K(induction at H of 4000A/m) of 0.5T was achieved by drawing under cooling die.