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Iron-cobalt alloy and preparation method of magnetizing pole head of iron-cobalt alloy

An iron-cobalt alloy, magnetizing pole technology, applied in the direction of manufacturing tools, magnetic objects, heat treatment equipment, etc., can solve the problems of low saturation magnetic induction intensity of pure iron materials, increased material coercivity, and increased use costs, etc. Inexpensive cost, low coercivity, and the effect of mass production

Active Publication Date: 2014-06-04
梅州市嘉晟工贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the magnetizing poles equipped with a large number of magnetizing equipment used in the electronics industry are usually made of pure iron materials. It has been proved by practice that the saturation magnetic induction of pure iron materials is not very high, and it also has serious natural aging phenomena; The prolongation of the use time will increase the coercive force of the material, especially the temperature rise during use, so that the coercive force of the material will rise rapidly, and the remanence will increase, which will affect the performance of the material.
In the prior art, some units have selected Fe-50Co alloy material as the magnetizing pole head for individual magnetizing equipment requiring high performance. Although the saturation magnetic induction of this material is higher, it is expensive due to the high cobalt content. Increased use cost; in addition, Fe-50Co alloy has poor mechanical properties and low compressive strength after treatment, and it is easy to deform after a long period of use, which affects the use effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. The iron-cobalt alloy composition (percentage by weight) of Example 1 of the present invention is Co 29.12%, Nb 0.29%, Zr 0.11%, La 0.06%, and the balance is Fe.

[0024] 2. Its preparation method is;

[0025] ①. Raw materials such as electrolytic cobalt, high-purity iron, niobium bar, zirconium bar, and rare earth lanthanum are vacuum smelted and cast into alloy ingots;

[0026] ②. After cleaning the sundries and defects on the surface of the alloy ingot, heat the alloy to 1180°C and keep it warm for forging. After forging the pole head blank, cool the forging to a temperature of 810°C, and put it directly into the room where the temperature is maintained at -8°C to -15°C. Quenching in a mixed solution of dry ice and water;

[0027] ③ After quenching and heat treatment, the material is machined into a magnetized pole head;

[0028] ④. Heat the magnetized pole head to 550°C in a hydrogen protective atmosphere, keep it warm for 2 hours, cool it in the furnace to bel...

Embodiment 2

[0033] 1. The composition (percentage by weight) of the iron-cobalt alloy in Example 2 of the present invention is Co 31.91%, Nb 0.25%, Zr 0.15%, La 0.09%, and the balance is Fe.

[0034] 2. Its preparation method is:

[0035] ①. Raw materials such as electrolytic cobalt, high-purity iron, niobium bar, zirconium bar, and rare earth lanthanum are vacuum smelted and cast into alloy ingots;

[0036] ②. After cleaning the sundries and defects on the surface of the alloy ingot, heat the alloy to 1180°C and keep it warm for forging. After forging the pole head blank, cool the forging to a temperature of 850°C, and put it directly into the room where the temperature is maintained at -8°C to -15°C. Quenching in a mixed solution of dry ice and water;

[0037] ③ After quenching and heat treatment, the material is machined into a magnetized pole head;

[0038] ④. Heat the magnetized pole head to 600°C in a hydrogen protective atmosphere, keep it warm for 1 hour, and cool it in the furn...

Embodiment 3

[0043] 1. The iron-cobalt alloy composition (percentage by weight) of Example 3 of the present invention is Co 30.75%, Nb 0.26%, Zr 0.21%, La 0.05%, and the balance is Fe.

[0044] 2. Its preparation method is:

[0045] ①. Raw materials such as electrolytic cobalt, high-purity iron, niobium bar, zirconium bar, and rare earth lanthanum are vacuum smelted and cast into alloy ingots;

[0046] ②. After cleaning the sundries and defects on the surface of the alloy ingot, heat the alloy to 1180°C and keep it warm for forging. After forging the pole head blank, cool the forging to 820°C, and put it directly into the room where the temperature is maintained at -8°C to -15°C. Quenching in a mixed solution of dry ice and water;

[0047] ③ After quenching and heat treatment, the material is machined into a magnetized pole head;

[0048] ④. Heat the magnetized pole head to 570°C in a hydrogen protective atmosphere, keep it warm for 1.5 hours, cool it in the furnace to below 100°C, and t...

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Abstract

The invention discloses an iron-cobalt alloy and a preparation method of a magnetizing pole head of the iron-cobalt alloy. The iron-cobalt alloy comprises the following substances in percentage by weight: 29-34.5% of Co, 0.05-0.15% of rare earth, 0.15-0.40% of Nb, 0.10-0.25% of Zr and the balance of Fe. The preparation method of the magnetizing pole head of the iron-cobalt alloy comprises the following steps: 1) smelting the alloy by virtue of a vacuum furnace and casting the alloy into alloy ingot; 2) after forging and molding, directly quenching in a mixed solution of dry ice and water; 3) processing the forge piece into the magnetizing pole head; 4) subsequently carrying out three times of treatment containing pre-heating treatment and multiplex heat treatment by using a protective atmosphere heat treatment furnace and a vacuum heat treatment furnace so as to ensure excellent comprehensive properties of a finished product. The magnetizing pole head produced by virtue of the preparation method has the advantages of strong saturation flux density, low coercive force, small residual magnetism, good mechanical property, high compressive strength, long service life and good quality stability and can meet operating requirements on high property of the magnetizing pole head in the electron industry.

Description

technical field [0001] The invention relates to the technical field of magnetizing pole head preparation in magnetizing equipment, in particular to an iron-cobalt alloy and a method for preparing the magnetizing pole head, which is particularly suitable for magnetizing pole heads requiring high saturation magnetic induction and good mechanical properties. Background technique [0002] At present, the magnetizing poles equipped with a large number of magnetizing equipment used in the electronics industry are usually made of pure iron materials. It has been proved by practice that the saturation magnetic induction of pure iron materials is not very high, and it also has serious natural aging phenomena; The prolongation of the use time will increase the coercive force of the material, especially the temperature rise during use, so that the coercive force of the material will rise rapidly, and the remanence will increase, which will affect the performance of the material. In the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/14C21D6/00C21D1/60H01F13/00
Inventor 刘志坚陈远星何坤宏
Owner 梅州市嘉晟工贸有限公司
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