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为了综合利用我国稀土资源,降低Nd—Fe—B永磁合金的成本,研究了廉价(Nd、Pr)—Fe—B和(Ce、Nd、Pr)—Fe—B永磁材料的化学成分,制造工艺与磁性能的关系及其变化规律。添加Al可以大幅度提高合金的矫顽力。(Nd、Pr)—Fe—B合金最佳磁性能:Br=1.25T,M_Hc=714.3kA/m,(BH)_(max)=297.5kJ/m~3。(Nd、Pr)_(1-y)Ce_y—Fe—B合金的磁性能随Ce含量增加而降低。研究测定了合金的居里温度609～590K,剩磁可逆温度系数-0.094～-0.119％/K。观察分析了合金的显微组织,并测定了合金的密度,硬度及电阻率。
In order to comprehensively utilize rare earth resources in our country and reduce the cost of Nd-Fe-B permanent magnetic alloys, the chemical compositions of inexpensive (Nd, Pr) -Fe-B and (Ce, Nd, Pr) The Relationship Between Manufacturing Process and Magnetic Properties and Its Variation. Adding Al can greatly improve the coercivity of the alloy. The best magnetic properties of (Nd, Pr) -Fe-B alloy are Br = 1.25T, M_Hc = 714.3kA / m and BH = 297.5kJ / m ~ 3. The magnetic properties of (Nd, Pr) _ (1-y) Ce_y-Fe-B alloy decrease with the increase of Ce content. The study measured the Curie temperature of alloy 609 ~ 590K, remanent reversible temperature coefficient -0.094 ~ -0.119% / K. The microstructure of the alloy was observed and analyzed. The density, hardness and resistivity of the alloy were measured.