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Heat treatment method of FeGa-based high damping alloy

A technology of high damping alloy and heat treatment method, which is applied in the field of heat treatment of FeGa-based high-damping alloy, can solve the problems of inability to improve the damping performance of FeGa-based alloy, and achieve the effect of wide application range

Active Publication Date: 2018-07-06
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a heat treatment method for FeGa-based high damping alloys to solve the technical problem that the existing heat treatment process cannot significantly improve the damping performance of FeGa-based alloys

Method used

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  • Heat treatment method of FeGa-based high damping alloy
  • Heat treatment method of FeGa-based high damping alloy
  • Heat treatment method of FeGa-based high damping alloy

Examples

Experimental program
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Effect test

Embodiment 1

[0029] This embodiment provides a heat treatment method for a wide temperature range high damping FeGa-based alloy, such as figure 1 shown, including the following steps:

[0030] (1) Pretreatment: Place the alloy sample in a tubular heat treatment furnace, heat it up to 800°C at a heating rate of 120°C / h under a protective atmosphere of argon, hold it for 1 hour, and then cool it at a rate of 120°C / h Cool to room temperature with the furnace, a total of 4 cycles;

[0031] (2) Heat treatment: In a tubular heat treatment furnace, under a protective atmosphere of Ar gas, heat to 800°C at a heating rate of 120°C / h, and hold for 1h;

[0032] (3) Furnace cooling treatment: cooling treatment is carried out by heating the alloy sample, the cooling rate is 90°C / h, and the temperature is kept at 750°C, 700°C, 680°C, 660°C, and 640°C for 0.5h during the cooling process;

[0033] (4) Quenching treatment: Rapidly perform water quenching treatment on the sample kept at 640° C. for 0.5 h,...

Embodiment 2

[0035] This embodiment provides a heat treatment method for a wide temperature range high damping FeGa-based alloy, such as figure 2 shown, including the following steps:

[0036] (1) Pretreatment and heat treatment: place the alloy sample in a tubular heat treatment furnace, and heat it to 800°C at a heating rate of 120°C / h under the protective atmosphere of argon, and keep it for 6h;

[0037] (2) Furnace cooling treatment: conduct cooling treatment on the alloy sample through heating treatment, the cooling rate is 90°C / h, when the temperature drops to 620°C, keep it for 1h;

[0038] (3) Quenching treatment: the sample kept at 620° C. for 1 hour was quickly subjected to water quenching treatment, and cooled to room temperature.

Embodiment 3

[0040] This embodiment provides a heat treatment method for FeGa-based high damping alloys, such as image 3 shown, including the following steps:

[0041] (1) Pretreatment The temperature of the FeGa-based alloy material is first raised to 800°C at a rate of 120°C / h by means of alternating cold and heat cycles, and after holding for 1 hour, it is then lowered to room temperature with the furnace at a rate of 120°C / h. cycle, a total of 4 cycles to reduce the internal stress of the material;

[0042] (2) Heat treatment: In a tubular heat treatment furnace, under a protective atmosphere of Ar gas, heat to 800°C at a heating rate of 120°C / h, and hold for 1h;

[0043] (3) Furnace cooling treatment: the heat-treated alloy sample is cooled to a certain temperature of 450-750°C at a rate of 90°C / h, and kept for 0.5h.

[0044] (4) Quenching treatment: quickly oil quench the sample kept for 0.5h, and cool it to room temperature.

[0045] The damping performance of the material proce...

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Abstract

The invention discloses a heat treatment method of FeGa-based high damping alloy. The method comprises the steps: eliminating the inner defects of a material by pretreatment, then heating to 800 DEG Cat the heating rate of 120 DEG C / h and remaining for 1h, furnace-cooling to 580-660 DEG C at the rate of 120 DEG C / h and remaining for 0.5h, and thus enabling the inner temperature of the material tobe uniform; and fully conducting order-disorder transition and phase transition, and finally conducting quenching treatment. Compared with the current heat treatment process, the method can greatly improve the intrinsic damping performance of the material at low amplitude (at least 120*10-6), the damping value is increased for 1.5-3 times compared with an original sample, and the damping value isincreased for 2-3.5 times compared with the traditional heat-treated Fe-based high damping material. Meanwhile, the method has the advantages that the whole heat treatment process is conducted belowrecrystallization temperature, the damping performance of the material is greatly improved, and the mechanical properties of the material is almost not damaged.

Description

technical field [0001] The invention relates to the technical field of heat treatment of high damping alloys, in particular to a heat treatment method for FeGa-based high damping alloys. Background technique [0002] In recent years, FeGa-based alloys have received widespread attention as a new generation of magnetostrictive materials. When magnetostrictive materials are subjected to external magnetic fields and stress fields, the internal magnetic domains will rotate accordingly, which can cause energy loss in the process. , thus becoming the source of high damping performance. Traditional Fe-based high-damping materials such as FeCr-based, FeAl-based, and FeMo-based alloys mainly increase the grain size and reduce internal stress through high-temperature heat preservation and furnace cooling, which is beneficial to the rotation and migration of magnetic domains. The damping performance of alloys is improved, such as FeCr-based alloys. At present, the optimal heat treatmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/78C21D1/18
Inventor 孙孟王先平蒋卫斌张立峰高云霞庄重刘旺方前锋
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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