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A non-cold deformable ti-ni block with high elastic thermal effect and its preparation method

A technology of cold deformation and thermal effect, applied in the field of bulk Ti-Ni materials, can solve the problems of restricting the large-scale application of elasto-thermal materials, demanding material plasticity, and difficult processing, so as to reduce the difficulty of material processing, time cost, high cost, etc. Elastothermal cooling effect, improving macro-scale effect

Active Publication Date: 2022-05-20
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current shape memory alloy materials with high elastothermal properties are mostly wire or film materials, which limits the application of elastothermal materials on a large scale; in addition, the manufacture of shape memory alloys such as wires and sheets relies on drawing and extrusion Low temperature cold deformation mechanical processing means, processing is difficult, time-consuming, and has strict requirements on material plasticity

Method used

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  • A non-cold deformable ti-ni block with high elastic thermal effect and its preparation method
  • A non-cold deformable ti-ni block with high elastic thermal effect and its preparation method

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preparation example Construction

[0029] Such as figure 1 As shown, the preparation method of the non-cold deformation high elastothermal effect Ti-Ni bulk material provided by the present invention comprises the following steps:

[0030] (1) Alloy smelting

[0031] According to the atomic ratio, 48.8-49.3% Ti and 50.7-51.2% Ni are mixed as raw materials, and the raw materials are subjected to argon arc melting under the working current of the melting furnace. During the melting process, electromagnetic stirring with a current of 15A is carried out, and the ingot is operated at 300-450A. A single 1min smelting and 5 turning times were carried out under the electric current to obtain a Ti-Ni ingot block base material with solid solution strengthening effect. The raw material 50.7-51.2% Ni can be further doped with Cr element with an atomic ratio of ≤0.5%, so as to further enhance the effect of regulating the phase transition of the precipitates.

[0032] (2) suction molding

[0033] Step (1) The treated ingo...

Embodiment 1

[0042] According to the chemical composition (atomic percentage), 49.3% of Ti and 50.7% of Ni are proportioned as metal raw materials.

[0043] Prepare as follows:

[0044] (1) Alloy smelting: According to the chemical composition of the ratio, each metal raw material is subjected to argon arc melting under the working current of the melting furnace. During the melting process, electromagnetic stirring with a current of 15A is carried out, and the ingot is carried out under a working current of 300A for 1 minute. smelting and flipping 5 times.

[0045] (2) Suction casting molding: the smelted ingot is heated to a molten state by electric arc, vacuum suction casting is performed after the arc is stopped, so that the molten alloy enters a 10mm*10mm cylindrical mold for suction casting molding, and the casting mold is cooled by circulating water at room temperature. The molding time is 75s after suction casting, and the cuboid ingot blocks are obtained. The rectangular parallel...

Embodiment 2

[0051] According to the chemical composition (atomic percentage), 49.2% of Ti and 50.8% of Ni are proportioned as metal raw materials.

[0052] Prepare as follows:

[0053] (1) Alloy smelting: According to the chemical composition of the ratio, each metal raw material is subjected to argon arc melting under the working current of the melting furnace. During the melting process, electromagnetic stirring with a current of 15A is carried out, and the ingot is carried out under a working current of 350A for 1 minute. smelting and flipping 5 times.

[0054] (2) Suction casting molding: the smelted ingot is heated to a molten state by electric arc, vacuum suction casting is performed after the arc is stopped, so that the molten alloy enters a 10mm*10mm cylindrical mold for suction casting molding, and the casting mold is cooled by circulating water at room temperature. The molding time is 60s after suction casting, and the cuboid ingot blocks are obtained. The rectangular parallel...

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Abstract

The invention discloses a non-cold deformation Ti-Ni block material with high elastic-thermal effect and a preparation method thereof, comprising: argon-arc smelting 48.8-49.3% Ti and 50.7-51.2% Ni metal raw materials; Wire electric discharge cutting; solid solution homogenization treatment to homogenize microscopic components, aging treatment, electrochemical surface modification, and obtain coarse-grained bulk Ti‑Ni alloy bulk. The Ti-Ni block produced by the present invention does not require cold deformation processing, and the thickness of the plate-shaped block is at the millimeter level. Under non-cold deformation conditions, similar elastothermal effects are achieved, and the maximum adiabatic temperature change can reach 22.7K, which can achieve greater elastothermic refrigeration applications under the range. This method significantly improves the elastothermal effect of the material and has broad application prospects.

Description

technical field [0001] The invention relates to a class of non-cold deformable block Ti-Ni alloy material with high elastothermal properties and a preparation method thereof, in particular to a block Ti-Ni material capable of falling over 19K adiabatic temperature. Background technique [0002] Refrigeration technology is widely used in today's world, and refrigeration energy consumption exceeds 20% of the total global electricity consumption. However, traditional refrigeration technology represented by vapor compression has brought a series of environmental problems at the same time. With the advantages of environmental friendliness and high refrigeration efficiency, elastothermic refrigeration technology is considered to be one of the most potential new refrigeration technologies to replace the old refrigeration mechanism, and has received extensive attention in recent years. [0003] The basic performance evaluation indexes of elastothermal materials are adiabatic tempera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/03C22C1/02B22D7/00B22D18/06C22F1/10C22F1/02C21D1/18
CPCC22C19/03C22C19/007C22C1/023B22D7/005B22D18/06C22F1/002C22F1/10C22F1/02C21D1/18C22F1/006
Inventor 周玉美丁磊薛德祯丁向东孙军
Owner XI AN JIAOTONG UNIV