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Preparation method of magnetostriction alloy with excellent combined properties

A comprehensive performance, magnetostrictive technology, applied in the direction of material selection for magnetostrictive devices, device material selection, etc., can solve the problem of low magnetostrictive performance, reduce eddy current loss, and expand the application field.

Inactive Publication Date: 2010-03-24
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, Fe-Ga alloy has great potential application value in the field of ultrasound and micro-displacement, which has attracted widespread attention, but its magnetostrictive performance is still relatively low.

Method used

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  • Preparation method of magnetostriction alloy with excellent combined properties
  • Preparation method of magnetostriction alloy with excellent combined properties
  • Preparation method of magnetostriction alloy with excellent combined properties

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1) Smelting cast rods, using Fe and Ga with a purity greater than 99.9wt% as raw materials, weighed according to the atomic percentage of 75:25, put them into a quartz crucible, and adjust the vacuum degree of the vacuum chamber to reach 5×10 -2 ~2×10 -3 Pa, high-purity argon is introduced as protective gas, medium-frequency induction heating is melted and cast into a rod-shaped Fe with a diameter of 12mm in a water-cooled copper mold 75 Ga 25 alloy ingot. ;

[0021] 2) The composition is homogenized, and the smelted Fe 75 Ga 25 The alloy ingot is kept at 1000°C for 168h for a long time, and then cooled with the furnace;

[0022] 3) multi-stage heat treatment, the homogenized Fe 75 Ga 25 After the alloy ingot is vacuum packaged, it is heated to 1000°C, kept for 3h, cooled to 200°C at a furnace cooling rate of 0.9°C / min, kept for 3h, and then water quenched to room temperature.

[0023] Table 1: Fe prepared by this method 75 Ga 25 Polycrystalline alloy and Fe p...

Embodiment 2

[0027] 1) Smelting and casting rods, using Fe and Ga with a purity greater than 99.9wt% as raw materials, weighed according to the atomic percentage of 81:19, put them into a quartz crucible, and adjust the vacuum degree of the vacuum chamber to reach 5×10 -2 ~2×10 -3 Pa, high-purity argon is introduced as protective gas, medium-frequency induction heating is melted and cast into a rod-shaped Fe with a diameter of 12mm in a water-cooled copper mold 81 Ga 19 alloy ingot;

[0028] 2) The composition is homogenized, and the smelted Fe 81 Ga 19 The alloy ingot is kept at 1000°C for 24 hours for a long time, and then cooled with the furnace;

[0029] 3) multi-stage heat treatment, the homogenized Fe 81 Ga 19 After the alloy ingot is vacuum packaged, it is heated to 1000°C, kept for 0.5h, cooled to 300°C at a furnace cooling rate of 0.45°C / min, kept for 0.1h, and then water quenched to room temperature.

[0030] Table 2: Fe prepared by this method 81 Ga 19Polycrystalline al...

Embodiment 3

[0034] 1) Smelting and casting rods, using Fe and Ga with a purity greater than 99.9wt% as raw materials, weighed according to the atomic percentage of 81:19, put them into a quartz crucible, and adjust the vacuum degree of the vacuum chamber to reach 5×10 -2 ~2×10 -3 Pa, high-purity argon is introduced as protective gas, medium-frequency induction heating is melted and cast into a rod-shaped Fe with a diameter of 12mm in a water-cooled copper mold 81 Ga 19 alloy ingot;

[0035] 2) The composition is homogenized, and the smelted Fe 81 Ga 19 The alloy ingot is kept at 1100°C for 72 hours for a long time, and then cooled with the furnace;

[0036] 3) multi-stage heat treatment, the homogenized Fe 81 Ga 19 After the alloy ingot was vacuum packaged, it was heated to 800°C, kept for 5 hours, cooled to 100°C at a furnace cooling rate of 0.17°C / min and held for 6 hours, and then water quenched to room temperature.

[0037] Table 3: Fe prepared by this method 81 Ga 19 Polycry...

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Abstract

The invention discloses a preparation method of magnetostrictive alloy with excellent comprehensive performance, comprising the following steps: 1) Fe and Ca with the purity higher than 99.9 percent by weight are adopted as raw materials and smelted by high vacuum induction to obtain a bar-shaped Fe-Ca alloy ingot; 2) aiming at the uniformity of the alloy, long-time high-temperature aging treatment is carried out on the Fe-Ca alloy ingot; and 3) multi-stage heat treatment is carried out on the uniformized Fe-Ca alloy ingot after vacuum encapsulation. The invention has simple technique, can greatly improve the magnetoconstriction on the basis that the other service performances of the Fe-Ca alloy ingot are not affected, increases the specific resistance to a certain extent and reduces the cost of preparation, thus expanding the application field of the magnetostrictive material.

Description

technical field [0001] The invention relates to a method for preparing an alloy, in particular to a method for preparing a magnetostrictive alloy with excellent comprehensive performance. Background technique [0002] Magnetostrictive materials have the conversion function of electromagnetic energy and mechanical energy, and are important functional materials for energy and information conversion. They are widely used in the fields of sonar's underwater acoustic transducer technology, electroacoustic transducer technology, ocean detection and development technology, etc. . Fe-Ga alloy is a new type of magnetostrictive material discovered in recent years. Its saturation magnetic field is very low, only 1 / 10 of the common rare earth giant magnetostrictive material Terfenol-D alloy in the market, and its magnetic field sensitivity is relatively low. Second, the alloy has low brittleness, high tensile strength, and good processing performance. It can be made into plates, strips...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/04C22C38/00C21D6/00H01L41/20H10N35/85
Inventor 严密张晶晶马天宇何爱娜
Owner ZHEJIANG UNIV
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