Preparation method of alloy thin strip magnet of Sm(Co,Cu,Fe,Zr)-z type

A technology of thin strips and magnets, which is applied in the manufacture of magnets, magnetic objects, inductors/transformers/magnets, etc., and can solve the problems that thin strip magnets cannot be produced

Inactive Publication Date: 2010-01-06
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Also can't make the practical bulk strip magne

Method used

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  • Preparation method of alloy thin strip magnet of Sm(Co,Cu,Fe,Zr)-z type
  • Preparation method of alloy thin strip magnet of Sm(Co,Cu,Fe,Zr)-z type
  • Preparation method of alloy thin strip magnet of Sm(Co,Cu,Fe,Zr)-z type

Examples

Experimental program
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Effect test

Embodiment 1

[0037] The first step, raw material preparation

[0038] According to the atomic percentage ratio of raw materials Sm (Co 0.678 Cu 0.067 Fe 0.222 Zr 0.033 ) 7.5 , Weigh the component raw materials pure Sm, Co, Cu, Fe and Zr, add 2% pure Sm according to the mass percentage of the pure Sm weighed by the raw material ratio when batching, thus complete the raw material preparation.

[0039] The second step is to melt the raw materials to prepare master alloy ingots

[0040] Put all the raw materials prepared in the first step into the crucible of the vacuum induction melting furnace, and evacuate the furnace body to a degree of vacuum of less than 10 -2 Pa, the furnace temperature rises to higher than the highest melting point of the raw material metal until all the raw material metal is smelted evenly, and the evenly smelted Sm(Co 0.678 Cu 0.067 Fe 0.222 Zr 0.033 ) 7.5 melt, and then the melt was cooled in a water-cooled copper crucible to obtain cast Sm(Co 0.678 Cu 0...

Embodiment 2

[0050] Except changing the raw material ratio of the first step in embodiment 1 into Sm(Co 0.685 Cu 0.062 Fe 0.247 Zr 0.028 ) 7.5 , the circumferential speed of the cooling molybdenum roll of the third step, that is, the quenching speed of the melt becomes 5m / s, and the others are all the same as in Example 1.

Embodiment 3

[0052] Except changing the raw material ratio of the first step in embodiment 1 into Sm(Co 0.703 Cu 0.068 Fe 0.199 Zr 0.030 ) 7.5 , the circumferential speed of the cooling molybdenum roll of the third step, that is, the rapid quenching speed of the melt becomes 15m / s, and the others are all the same as in Example 1.

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Abstract

The invention relates to a preparation method of alloy thin strip magnets of Sm(Co,Cu,Fe,Zr)-z types and relates to a magnet containing hard magnetic materials of a rare-earth metal and magnetic transition metals. The preparation method comprises the following steps: presenting a chemical composition formula in a melt of Sm(Cox Cuy Feu Zrv) z; rapidly quenching the melt on a cooling molybdenum roller or a copper roller rotating at a peripheral speed of 5-40 m/s by a melt rapidly quenching furnace or a vacuum melting rapidly quenching continuous furnace to obtain melt thin strips of Sm(Co,Cu,Fe,Zr)-z types; pulverizing the melt thin strips into powder; pressing the powder into blocks in a magnetic field larger than 1T; and compacting the blocks in a cold isostatic press before final heat treatment. The invention provides three heat treatment processes and accordingly obtains the practical block alloy thin strip magnets of Sm(Co,Cu,Fe,Zr)-z types with different characteristics.

Description

technical field [0001] The technical scheme of the present invention relates to the magnet of hard magnetic material containing rare earth metal and magnetic transition metal, specifically Sm(Co, Cu, Fe, Zr) z The preparation method of alloy strip magnet. Background technique [0002] Recently, the defense and commercial markets demand new high-temperature permanent magnet materials that can work stably in environments above 400°C. Among all the current high-performance rare earth permanent magnets, only Sm-Co-based magnets can meet the requirements. Adding non-magnetic elements Cu, Zr and Fe with high magnetic moment to Sm-Co, the traditional Sm 2 (Co, Cu, Fe, Zr) 17 Magnets, also referred to simply as Sm 2 tm 17 type magnets whose commercial composition is Sm(Co, Fe, Cu, Zr) z , where z=7.4~8.5. However, the maximum operating temperature of this common 2:17 type Sm-Co permanent magnet is only about 300°C, and the magnetic induction demagnetization curve is nonlinear...

Claims

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Application Information

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IPC IPC(8): H01F41/02H01F1/047H01F7/00B22F9/04B22F3/16C22C1/03
Inventor 孙继兵崔春翔杨薇韩瑞平丁贺伟
Owner HEBEI UNIV OF TECH
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