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Fe-Mn-Al-Ni-Cu superelastic alloy and preparation method thereof

A technology for superelastic alloys and sample alloys, which is applied in the field of iron-based superelastic alloy materials, can solve the problems that the preparation efficiency and material properties cannot be improved synchronously, and the difficulty in alloy production and application, so as to avoid natural aging phenomenon and have a wide range of applications , The process is simple and effective

Active Publication Date: 2022-01-14
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In summary, in current FeMnAlNi-based alloys, increasing the single crystal preparation efficiency will be accompanied by an increase in the intergranular fracture tendency of the alloy, and the preparation efficiency and material properties cannot be improved simultaneously, which leads to the existence of such alloys in the actual production and application of engineering. difficulty

Method used

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  • Fe-Mn-Al-Ni-Cu superelastic alloy and preparation method thereof
  • Fe-Mn-Al-Ni-Cu superelastic alloy and preparation method thereof
  • Fe-Mn-Al-Ni-Cu superelastic alloy and preparation method thereof

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Effect test

Embodiment 1

[0018] Select the pure metal raw materials metal iron, metal manganese, metal aluminum, metal nickel, and metal copper used in industry, and carry out ingredients according to the atomic percentage content of Fe 40.5%, Mn 34%, Al 15%, Ni 7.5%, and Cu 3%. The vacuum non-consumable electric arc furnace is smelted under the protection of argon. During the smelting process, the magnetic stirring technology is used to mix the metal solution evenly. The casting is heated to 1200°C for 2 hours and then hot-rolled, and then hot-rolled from 20mm to 6mm at room temperature. Then proceed as image 3 As shown in the schematic diagram of cyclic heat treatment, the sample after cyclic heat treatment was aged at 200°C for 3 hours and then water-cooled.

[0019] The polycrystalline Fe-Mn-Al-Ni-Cu superelastic alloy obtained in this embodiment is loaded-unloaded at room temperature The stress-strain curve obtained is shown in the appendix figure 1 . From attached figure 1 It can be seen fr...

Embodiment 2

[0021] Select pure metal raw materials used in industry, such as iron, manganese, aluminum, nickel, and copper, according to the atomic percentage content of Fe 30-50%, Mn 25-40%, Al 10-20%, Ni 1-15%, Cu 1~10% is used for batching, and the vacuum non-consumable electric arc furnace is used for melting under the protection of argon. During the melting process, the magnetic stirring technology is used to mix the metal solution evenly. During the melting process, the alloy is repeatedly smelted 5 times, and finally the suction Cast into columns. The casting is heated to 1200°C for 2 hours and then hot-rolled, then hot-rolled from 20mm to 6mm at room temperature. The superelastic alloy is directional annealed at a temperature above the γ-phase precipitation temperature. a. The temperature of the hot zone for directional annealing is between 600-1300°C, and the width of the hot zone is between 1-100mm. b. The moving speed of the directional annealing hot zone is between 0.1-500 μm...

Embodiment 3

[0023]Select pure metal raw materials used in industry, such as iron, manganese, aluminum, nickel, and copper, according to the atomic percentage content of Fe 30-50%, Mn 25-40%, Al 10-20%, Ni 1-15%, Cu 1~10% is used for batching, and the vacuum non-consumable electric arc furnace is used for melting under the protection of argon. During the melting process, the magnetic stirring technology is used to mix the metal solution evenly. During the melting process, the alloy is repeatedly smelted 5 times, and finally the suction Cast into columns. The casting is heated to 1200°C and homogenized for 2 hours, then hot-rolled, and then hot-rolled from 20mm to 6mm at room temperature. The superelastic alloy can be obtained by heat treatment at a temperature above the γ-phase precipitation temperature, directional annealing and cyclic heat treatment. Single crystal Or columnar Fe-Mn-Al-Ni-Cu superelastic alloy.

[0024] Directional annealing: a. The temperature of the hot zone for direc...

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Abstract

The invention provides a Fe-Mn-Al-Ni-Cu superelastic alloy and a preparation method thereof. The Fe-Mn-Al-Ni-Cu superelastic alloy comprises the components in atomic percent, 25 to 40 percent of Mn, 10 to 20 percent of Al, 1 to 15 percent of Ni, 1 to 10 percent of Cu and the balance Fe. The preparation method comprises the following steps of (1) burdening according to the atomic percent content, and fully smelting and mixing in vacuum or inert gas protection to obtain a casting; (2) homogenizing the casting obtained in the step (1), and then deforming to obtain a required sample alloy; and (3) selecting a directional annealing process and / or a circulating heat treatment process as required to regulate and control the grain size. According to the Fe-Mn-Al-Ni-Cu superelastic alloy and the preparation method thereof provided by the invention, the single crystal preparation efficiency of circulating heat treatment and directional annealing can be effectively improved, the growth rate of alloy crystal grains is increased, and meanwhile, the intergranular fracture tendency caused by conventional abnormal crystal grain growth promoting elements Ti and Al in the FeMnAlNi alloy is avoided.

Description

technical field [0001] The invention relates to a superelastic Fe-Mn-Al-Ni-Cu superelastic alloy and a preparation method thereof, belonging to the technical field of iron-based superelastic alloy materials. Background technique [0002] Superelastic alloys can produce strains far beyond the elastic limit after being deformed by force, and can return to the shape before deformation after unloading the stress. This special mechanical behavior characteristic with shape memory effect makes it widely used in automotive machinery, aviation Aerospace, vibration reduction and anti-seismic, smart sensors and many other fields have a wide range of applications. [0003] With the ever-increasing demands of production and life and the material bottlenecks faced by high-tech fields, there is an urgent need to reduce the cost of superelastic alloys and break through the performance of superelastic alloys. Therefore, in the past few decades, researchers have paid great attention to the d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/06C22C38/08C22C38/16C22C30/02C22C33/04C21D1/18C21D1/26C21D1/78
CPCC22C38/04C22C38/06C22C38/08C22C38/16C22C30/02C22C33/04C21D1/18C21D1/26C21D1/785
Inventor 张中武汪必琛黎席廷王茜宇
Owner HARBIN ENG UNIV
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