会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 4. 发明授权
    • Quenched thin ribbon of rare earth/iron/boron-based magnet alloy
    • 淬火的稀土/铁/硼基磁体合金薄带
    • US06319335B1
    • 2001-11-20
    • US09502777
    • 2000-02-11
    • Koichi HirotaTakehisa MinowaTakahiro HashimotoKoji SatoKenji Yamamoto
    • Koichi HirotaTakehisa MinowaTakahiro HashimotoKoji SatoKenji Yamamoto
    • H01F1057
    • B82Y25/00B22F9/023H01F1/0571H01F1/0573H01F1/0577H01F1/0579
    • Disclosed is a novel thin ribbon of a rare earth/iron/boron-based magnet alloy prepared by quenching of an alloy melt by the method of strip casting, from which a sintered permanent magnet is obtained by the powder metallurgical method. The sintered permanent magnet can be imparted with greatly improved magnetic properties or, in particular, residual magnetic flux density when the thin alloy ribbon as the base material thereof has a metallographic phase structure containing “four-phase regions” consisting of (a) an &agr;-iron phase, (b) a R-rich phase, in which R is a rare earth element selected from praseodymium, neodymium, terbium and dysprosium, (c) a RxT4B4 phase, in which T is iron or a combination of iron and a transition metal element other than iron and rare earth elements and x is a positive number varying with the rare earth element, and (d) a R2T14B phase, in which R and T each have the same meaning as defined above, each phase being dispersed with a grain diameter in a limited range, in a volume fraction of from 1 to 10%.
    • 公开了一种稀土/铁/硼基磁体合金的新颖薄带,其通过带状铸造方法淬火合金熔体而制备,通过粉末冶金法获得烧结永久磁铁。 当作为其基材的薄合金带具有包含由(a)α(a))组成的“四相区域”的金相相结构时,可以赋予烧结永久磁铁大大提高的磁性能,特别是剩余磁通密度 - 相,(b)富R相,其中R是选自镨,钕,铽和镝的稀土元素,(c)RxT4B4相,其中T是铁或铁和 除铁和稀土元素以外的过渡金属元素,x是稀土元素变化的正数,(d)R2T14B相,其中R和T各自具有与上述相同的含义,每相分散有 粒径在有限范围内,体积分数为1〜10%。
    • 7. 发明授权
    • Rare earth/iron/boron-based permanent magnet alloy composition
    • 稀土/铁/硼基永磁合金组成
    • US06296720B1
    • 2001-10-02
    • US09456819
    • 1999-12-08
    • Kenji YamamotoKoro TatamiTakehisa Minowa
    • Kenji YamamotoKoro TatamiTakehisa Minowa
    • H01F1057
    • H01F1/0577H01F1/057
    • Disclosed is a rare earth/iron/boron-based permanent magnet alloy composition capable of giving, by a powder metallurgical process, a permanent magnet having excellent coercive force and residual magnetization as well as good squareness ratio of the hysteresis loop. The magnet alloy composition consists of: (a) from 28 to 35% by weight of a rare earth element selected from the group consisting of neodymium, praseodymium, dysprosium, terbium and holmium; (b) from 0.1 to 3.6% by weight of cobalt; (c) from 0.9 to 1.3% by weight of boron; (d) from 0.05 to 1.0% by weight of aluminum; (e) from 0.02 to 0.25% by weight of copper; (f) from 0.02 to 0.3% by weight of zirconium or chromium; (g) from 0.03 to 0.1% by weight of carbon; (h) from 0.1 to 0.8% by weight of oxygen; (i) from 0.002 to 0.2% by weight of nitrogen; and (j) the balance to 100% by weight of iron and unavoidable impurity elements.
    • 公开了一种稀土/铁/硼基永磁体合金组合物,其能够通过粉末冶金方法给出具有优异矫顽力和剩余磁化强度的永磁体以及磁滞回线的良好矩形比。 磁铁合金组成由以下组成:(a)28至35重量%的稀土元素,选自钕,镨,镝,铽和钬;(b)0.1至3.6重量%的钴 ;(c)0.9〜1.3重量%的硼;(d)0.05〜1.0重量%的铝;(e)0.02〜0.25重量%的铜;(f)0.02〜0.3重量% 的锆或铬;(g)0.03至0.1重量%的碳;(h)0.1至0.8重量%的氧;(i)0.002至0.2重量%的氮; 和(j)余量为100重量%的铁和不可避免的杂质元素。