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Invention Grant
CN104835641B 稀土类磁铁的制造方法 有权

稀土类磁铁的制造方法
Abstract:
提供一种稀土类磁铁的制造方法，该制造方法即使在主相率高的情况下也能够制造不仅磁化方面优异而且矫顽力性能也优异的稀土类磁铁。一种稀土类磁铁的制造方法，包括：制造烧结体的步骤，所述烧结体用组成式(R11‑xR2x)aTMbBcMd表示，具有包含主相和晶界相的组织，R1为包含Y的1种以上的稀土类元素，R2为与R1不同的稀土类元素，TM为包含Fe、Ni、Co中的至少1种以上的过渡金属，B为硼，M为Ti、Ga、Zn、Si、Al、Nb、Zr、Ni、Co、Mn、V、W、Ta、Ge、Cu、Cr、Hf、Mo、P、C、Mg、Hg、Ag、Au中的至少1种以上，0.01≤x≤1、12≤a≤20、b＝100‑a‑c‑d、5≤c≤20、0≤d≤3，它们的单位都为原子％；对烧结体实施热塑性加工，来制造稀土类磁铁前驱体的步骤；针对稀土类磁铁前驱体，使R3‑M改性合金的熔液向稀土类磁铁前驱体的晶界相扩散渗透，来制造稀土类磁铁的步骤，R3为包含R1、R2的稀土类元素。
Abstract(English):

The present invention is a method capable of producing a rare-earth magnet with excellent magnetization and coercivity. The method includes producing a sintered body including a main phase and grain boundary phase and represented by (R1 1-x R2 x ) a TM b B c M d (where R1 represents one or more rare-earth elements including Y, R2 represents a rare-earth element different than R1, TM represents transition metal including at least one of Fe, Ni, or Co, B represents boron, M represents at least one of Ti, Ga, Zn, Si, Al,etc., 0.01 ‰¤ x ‰¤ 1, 12 ‰¤ a ‰¤ 20, b = 100 - a - c - d, 5 ‰¤ c ‰¤ 20, and 0 ‰¤ d ‰¤ 3 (all at%)); applying hot deformation processing to the sintered body to produce a precursor of the magnet; and diffusing/infiltrating melt of a R3-M modifying alloy (rare-earth element where R3 includes R1 and R2) into the grain boundary phase of the precursor.

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