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NiMnGaCu high temperature shape-memory alloy and manufacturing method thereof

A technology of memory alloy and high temperature, which is applied in the field of shape memory alloy, can solve the problems of complex preparation process and high cost, and achieve the effects of low preparation cost, high martensitic transformation temperature and simple preparation method

Inactive Publication Date: 2009-06-24
如皋市生产力促进中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, after smelting this alloy, R.Kainuma needs to go through 720 hours of long-term homogenization heat treatment under vacuum conditions to finally obtain a sample with uniform composition and satisfactory performance, which leads to complicated preparation process and further increase in cost

Method used

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  • NiMnGaCu high temperature shape-memory alloy and manufacturing method thereof
  • NiMnGaCu high temperature shape-memory alloy and manufacturing method thereof
  • NiMnGaCu high temperature shape-memory alloy and manufacturing method thereof

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preparation example Construction

[0018] The preparation method and specific steps of the nickel-cobalt-manganese-tin high-temperature shape memory alloy of the present invention are as follows:

[0019] (1) According to Ni 43 co 7 mn 50-X sn X The atomic percentage weighs nickel (Ni) with a purity of 99.9%, cobalt (Co) with a purity of 99.9%, manganese (Mn) with a purity of 99.9% and tin (Sn) with a purity of 99.9%, where X=7~ 10;

[0020] (2) Put the nickel (Ni), cobalt (Co), manganese (Mn) and tin (Sn) raw materials weighed in the first step into a non-consumable vacuum electric arc furnace, and draw a vacuum so that the vacuum degree of the back reaches 2 ×10 -2 ~5×10 -3 Pa, and then filled with high-purity argon to 500Pa, using a high-temperature arc to melt the raw material into a NiCoMnSn button-shaped ingot;

[0021] (3) A rod-shaped ingot with a diameter of 10 mm was prepared by using a vacuum suction casting device to obtain a nickel-cobalt-manganese-tin high-temperature shape memory alloy.

...

Embodiment 1

[0024] Embodiment 1: prepare Ni 43 co 7 mn 41 sn 9 alloy

[0025] (1) According to Ni 43 co 7 mn 41 sn 9 The atomic percent is nickel (Ni) with a purity of 99.9%, cobalt (Co) with a purity of 99.9%, manganese (Mn) with a purity of 99.9% and tin (Sn) with a purity of 99.9%;

[0026] (2) Put the nickel (Ni), cobalt (Co), manganese (Mn) and tin (Sn) raw materials weighed in the first step into a non-consumable vacuum electric arc furnace, and draw a vacuum so that the vacuum degree of the back reaches 2 ×10 -2 ~5×10 -3 Pa, then filled with high-purity argon to 500Pa, using high-temperature arc to smelt the raw material into Ni 43 co 7 mn 41 sn 9 button-shaped ingot;

[0027] (3) Prepare a rod-shaped ingot with a diameter of 10mm by using a vacuum suction casting device to obtain Ni 43 co 7 mn 41 sn 9 High temperature shape memory alloys.

[0028] Using the electric spark cutting method, cut a cuboid with a size of 2×2×3 from the nickel-cobalt-manganese-tin high...

Embodiment 2

[0029] Embodiment 2: prepare Ni 43 co 7 mn 43 sn 7 alloy

[0030] (1) According to Ni 43 co 7 mn 43 sn 7 The atomic percent is nickel (Ni) with a purity of 99.9%, cobalt (Co) with a purity of 99.9%, manganese (Mn) with a purity of 99.9% and tin (Sn) with a purity of 99.9%;

[0031] (2) Put the nickel (Ni), cobalt (Co), manganese (Mn) and tin (Sn) raw materials weighed in the first step into a non-consumable vacuum electric arc furnace, and draw a vacuum so that the vacuum degree of the back reaches 2 ×10 -2 ~5×10 -3 Pa, then filled with high-purity argon to 500Pa, using high-temperature arc to smelt the raw material into Ni 43 co 7 mn 43 sn 7 button-shaped ingot;

[0032] (3) Prepare a rod-shaped ingot with a diameter of 10mm by using a vacuum suction casting device to obtain Ni 43 co 7 mn 43 sn 7 High temperature shape memory alloys.

[0033] Using the electric spark cutting method, cut a cuboid with a size of 2×2×3 from the nickel-cobalt-manganese-tin high-t...

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Abstract

The invention provides a NiCoMnSn high temperature shape memory alloy and a preparation method thereof. Ni, Co and Sn are weighted according to the atomic percent of Ni43Co7Mn<50-x>Sn<x>; wherein, X equals to 7-10; the raw materials of Ni, Co, and Sn weighted in the first step are put in a no consumable vacuum arc furnace, vacuumed to cause that the vacuum degree of the background reaches 2*10<-2> - 5*10<-3>Pa, and then charged with high-purity argon till 500 Pa; the raw materials are melted to NiCoMnSn button-type cast ingot by using high temperature voltaic arc; a vacuum suction mold device is used for preparing a bar-shaped cast ingot with the 10mm diameter, thus obtaining the Ni43Co7Mn<50-x>Sn<x> high temperature shape memory alloy. The martensitic phase transformation temperature of the NiCoMnSn prepared by the invention ranges from 120 DEG C-300 DEG C; the alloying elements of the raw materials are relatively cheap. The preparation method is simple and the alloy has uniform components; therefore, the follow-up heat treatment is not needed. The shape memory effect can reach up to 3.8%. The stability of the thermal circulation is high. The alloy is a new high temperature shape memory alloy with the application prospect.

Description

(1) Technical field [0001] The invention relates to a shape memory alloy, and the invention also relates to a preparation method of the shape memory alloy. Specifically, it is a NiCoMnSn shape memory alloy and a preparation method thereof. (2) Background technology [0002] Metamagnetic shape memory alloys (Metamagnetic shape memory alloys) are a new type of memory material developed on the basis of ferromagnetic shape memory alloys in recent years. The transformation of the parent phase produces a large reversible strain, which not only has a fast response speed and a large reversible strain, but also overcomes the shortcomings of the small output driving force of ferromagnetic shape memory alloys such as NiMnGa, thus making the magnetic shape memory alloy both It can be used as a temperature and magnetic field sensor, and is also expected to be widely used in the field of drives. At present, magnetically variable shape memory materials mainly include NiMnIn, NiCoMnIn and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/04C22C1/02
Inventor 陈枫田兵李莉郑玉峰
Owner 如皋市生产力促进中心
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