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A kind of preparation method of high strength and high damping cualmn shape memory alloy

A memory alloy, high damping technology, applied in metal rolling, elongation control, etc., can solve the problems of micro-area porosity, holes and composition segregation, and eliminate CuAlMn shape memory alloy casting defects, etc., to improve thermal stability and mechanical properties, eliminate casting defects, and improve mechanical properties

Active Publication Date: 2020-08-04
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the CuAlMn shape memory alloy prepared by the above prior art still has casting defects such as micro-area porosity, holes and composition segregation.
CN103421981A discloses a high-damping shape memory alloy, which is achieved by adding trace elements Ni, Ti, Co and rare earth elements Ce, Gd, Y to the CuAlMn shape memory alloy, and adjusting the addition amount to refine the structure, improve the strength of the material, The purpose of mechanical properties such as stability, corrosion resistance, fatigue resistance and superelasticity, but this technology also does not propose a specific technical solution to eliminate the casting defects of CuAlMn shape memory alloys

Method used

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  • A kind of preparation method of high strength and high damping cualmn shape memory alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] This example is a comparative example.

[0037] The first step, solution treatment:

[0038] Put the CuAlMn shape memory alloy raw material prepared by CN105568019B into a box furnace with a temperature of 850°C for solid solution treatment for 15 minutes;

[0039] The second step, quenching treatment:

[0040] The CuAlMn shape memory alloy prepared from CN105568019B after the first step of solid solution treatment is taken out of the box furnace, and then placed in water at 27°C for quenching treatment, thereby preparing Cu-11.9Al-2.5Mn shape memory alloy .

[0041] figure 1 (a) is the metallographic phase of the CuAlMn shape memory alloy (marked as #1CuAlMn shape memory alloy in Table 1 below) perpendicular to the rolling direction obtained in Example 1 after solution treatment at 850°C for 15 minutes and quenched state photo; by figure 1 (a) It can be seen that the CuAlMn shape memory alloy prepared in this comparative example presents equiaxed crystals with dis...

Embodiment 2

[0043] The first step, solution treatment:

[0044] Put the CuAlMn shape memory alloy raw material prepared by CN105568019B into a box furnace with a temperature of 830°C for solid solution treatment for 17 minutes;

[0045] The second step, groove rolling and quenching treatment:

[0046] The CuAlMn shape memory alloy prepared from CN105568019B after the first step of solid solution treatment is taken out from the box furnace, sent between the rolls of the groove rolling machine, and grooved for 8 passes along the length direction of the alloy. During the groove rolling, after the 3rd groove rolling and the 6th groove rolling, they were returned to the furnace for 8 minutes, the total deformation of the alloy sample was 80%, and the last rolling After the end, groove rolling is carried out in the same rolling groove again, and then the alloy sample is placed in 0°C water for quenching treatment, thus producing a high-strength and high-damping Cu-11.9Al-2.5Mn shape memory all...

Embodiment 3

[0049] The first step, solution treatment:

[0050] Put the CuAlMn shape memory alloy raw material prepared by CN105568019B into a box furnace with a temperature of 850°C for solid solution treatment for 15 minutes;

[0051] The second step, groove rolling and quenching treatment:

[0052] The CuAlMn shape memory alloy prepared from CN105568019B after the first step of solid solution treatment is taken out from the box furnace, and sent between the rolls of the groove rolling machine, and the groove rolling is carried out one pass along the length direction of the alloy. The total deformation of the alloy sample is 20%, and then groove rolling is carried out in the same rolling groove, and then the alloy sample is placed in 27°C water for quenching treatment, thereby producing a high-strength and high-damping Cu-11.9Al-2.5Mn shape memory alloy.

[0053] figure 1 (c) is the CuAlMn shape memory alloy obtained in Example 3, which has been subjected to solution treatment at 850...

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Abstract

The invention discloses a preparation method of a high-strength and high-damping CuAlMn shape memory alloy. The invention relates to a method for preparing a non-ferrous metal alloy by using a mother(intermediate) alloy through a smelting method, in particular to a groove type rolling process, which comprises the following steps: putting a CuAlMn shape memory alloy raw material prepared from CN105568019B into a box type furnace with the temperature of 830-880 DEG C, and carrying out solution treatment for 12-17 minutes; then feeding into a space between rollers of a groove-shaped rolling machine; carrying out the 1-8 passes of groove rolling along the length direction of the alloy; after the last pass of rolling is finished, carrying out primary groove rolling in the same rolling groove;and then putting the alloy sample into water at the temperature of 0-27 DEG C for quenching treatment, so that the high-strength and high-damping Cu-11.9Al-2.5 Mn shape memory alloy is prepared, and the casting defects of micro-area looseness, holes and segregation of the CuAlMn shape memory alloy prepared in the prior art are overcome.

Description

technical field [0001] The technical scheme of the present invention relates to the production of non-ferrous metal alloys using a master (intermediate) alloy by a smelting method, specifically a preparation method of a high-strength and high-damping CuAlMn shape memory alloy. Background technique [0002] As a new functional material, CuAlMn shape memory alloy not only has low price and good processing performance, but also has high damping ability and excellent shape memory effect. It is one of the best candidate materials for noise and noise problems, and it has a very wide application prospect in various fields of military and civilian use. However, this type of alloy still has the disadvantages of being prone to intergranular fracture and low mechanical properties due to coarse grains. Therefore, it is imminent to widen the application range of CuAlMn shape memory alloys by refining the grains by necessary means. [0003] So far, the main methods used for grain refine...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/08B21B37/56
CPCB21B37/56B21B2265/10C22F1/002C22F1/08
Inventor 王清周焦志娴刘亚飞牛浩源崔春翔殷福星张建军姚畅
Owner HEBEI UNIV OF TECH
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