A kind of preparation method of nimngacocu memory alloy thin strip

A memory alloy and strip technology, which is applied in the field of preparation of NiMnGaCoCu memory alloy thin strips, can solve the problems of easy volatilization and material composition changes, and achieve adjustable lattice distortion, wide temperature control range, elimination of internal stress and The effect of defects

Inactive Publication Date: 2020-12-08
GUIZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the flow casting process of this solution, the alloy solution is in a molten state, and the Mn component in the molten liquid solution is easy to volatilize, which makes the material composition change.

Method used

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  • A kind of preparation method of nimngacocu memory alloy thin strip
  • A kind of preparation method of nimngacocu memory alloy thin strip
  • A kind of preparation method of nimngacocu memory alloy thin strip

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A kind of Ni 45 mn 24 Ga 23 co 4 Cu 4 A method for preparing memory alloy thin strips, comprising the steps of:

[0035] 1) Melting: Select pure Ni, Mn, Ga, Co, Cu metal raw materials and place them in a vacuum melting furnace, fill in an inert gas after vacuuming, turn over and melt 3 times under the protection of an inert gas, and the uniform alloy solution after stirring is cooled in water Obtain NiMnGaCoCu alloy ingot after fully cooling in the copper mold;

[0036] 2) The first heat treatment;

[0037] 3) Rapid quenching: the heat-treated NiMnGaCoCu alloy ingot is melted and rapidly quenched in a smelting and spinning furnace with a rotation speed of 20m / s to make alloy thin strips;

[0038] 4) second heat treatment to obtain NiMnGaCoCu memory alloy thin strips;

[0039] Further, the first heat treatment in step 2) is to raise the temperature of the NiMnGaCoCu alloy ingot obtained in step 1) to 900°C at a rate of 5°C / min, heat preservation treatment for 24h,...

Embodiment 2

[0054] A kind of Ni 45 mn 24 Ga 23 co 4 Cu 4 A method for preparing memory alloy thin strips, comprising the steps of:

[0055] 1) Melting: Select pure Ni, Mn, Ga, Co, Cu metal raw materials and place them in a vacuum melting furnace, fill in an inert gas after vacuuming, turn over and melt 3 times under the protection of an inert gas, and the uniform alloy solution after stirring is cooled in water Obtain NiMnGaCoCu alloy ingot after fully cooling in the copper mold;

[0056] 2) The first heat treatment;

[0057] 3) Rapid quenching: the heat-treated NiMnGaCoCu alloy ingot is melted and rapidly quenched in a smelting and spinning furnace with a rotation speed of 20m / s to make alloy thin strips;

[0058] 4) second heat treatment to obtain NiMnGaCoCu memory alloy thin strips;

[0059] Further, the first heat treatment in step 2) is to raise the temperature of the NiMnGaCoCu alloy ingot obtained in step 1) to 900°C at a rate of 5°C / min, heat it for 24 hours, and then cool ...

Embodiment 3

[0065] A kind of Ni 46 mn 27 Ga 22 co 4 Cu 3.4 A method for preparing memory alloy thin strips, comprising the steps of:

[0066] 1) Melting: Select pure Ni, Mn, Ga, Co, Cu metal raw materials and place them in a vacuum melting furnace, fill in an inert gas after vacuuming, turn over and melt 4 times under the protection of an inert gas, and stir the uniform alloy solution in water cooling Obtain NiMnGaCoCu alloy ingot after fully cooling in the copper mold;

[0067] 2) The first heat treatment;

[0068] 3) Rapid quenching: the heat-treated NiMnGaCoCu alloy ingot is melted and rapidly quenched in a smelting and spinning furnace with a rotation speed of 20m / s to make alloy thin strips;

[0069] 4) second heat treatment to obtain NiMnGaCoCu memory alloy thin strips;

[0070] Further, the first heat treatment in step 2) is to raise the temperature of the NiMnGaCoCu alloy ingot obtained in step 1) to 900°C at a rate of 5°C / min, heat preservation treatment for 24h, and then ...

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Abstract

The invention relates to the technical field of alloy manufacturing, in particular to a preparation method of a NiMnGaCoCu memory alloy thin strip. The method comprises the steps: (1) melting, specifically, pure Ni, Mn, Ga, Co and Cu metal raw materials are selected and placed in a copper mold with a water cooling device in a vacuum smelting furnace, and after vacuumizing, the copper mold is filled with inert gas, then the metal raw materials are overturned and smelted under the protection of the inert gas, and full cooling is carried out on a stirred uniform alloy solution in the water cooling copper mold to obtain a NiMnGaCoCu alloy ingot; (2) first heat treatment; (3) rapid quenching, specifically, the heat-treated NiMnGaCoCu alloy ingot in a melting belt throwing furnace with the rotating speed of 10 m / s-30 m / s is rapidly quenched to prepare an alloy thin strip; and (4) secondary heat treatment is performed on the alloy thin strip to obtain the NiMnGaCoCu memory alloy thin strip. The prepared memory alloy thin strip has the characteristics of high toughness, ordered columnar grain arrangement and adjustable lattice torsion resistance.

Description

technical field [0001] The invention relates to the technical field of alloy production, in particular to a method for preparing NiMnGaCoCu memory alloy thin strips. Background technique [0002] NiMnGa-based series alloys have a large magnetic field or external force-induced shape memory effect, and their response frequency reaches several thousand Hz, which is much higher than the current heat-driven shape memory alloys. Under the action of stress and magnetic field, nickel-manganese-gallium single crystal alloys can produce up to 10 % strain, the strain is much larger than the current magnetostrictive alloy, which makes this alloy have broad application prospects in the fields of ultrasound, sensors, actuators and controllers, but the NiMnGa-based series alloys are inherently brittle and difficult to Processing and forming, the surface is easy to crack and fail after forming, which also limits its application and promotion in many fields. [0003] At present, researchers...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/02C22C1/02C22F1/00
CPCC22C1/02C22C19/03C22C30/02C22F1/00C22F1/10
Inventor 韦俊
Owner GUIZHOU NORMAL UNIVERSITY
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