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Manganese-based memory alloy with high-strength, plasticity and damping performances and production thereof

A technology of memory alloy and high plasticity, applied in the field of memory alloy, can solve the problems of low yield strength, poor memory ability, and poor superelasticity, and achieve the effect of high yield strength, good superelasticity, and good memory ability

Inactive Publication Date: 2006-08-16
JIANGYIN POLYTECHNIC COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the yield strength of the current manganese-based memory alloy is low, 200MPa; the memory ability is poor, and the memory recovery rate is 30-50%; the superelasticity is poor, 0.5%; it is easy to rust

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The alloy material of the present invention obtained by magnetic levitation high-frequency induction melting has the following components: 19% Cu (parts by weight, the same below), 3% Ni, 3% Cr, 0.1N%, 0.5Ti, and the rest is Mn. 1kg ingot is placed in a protective atmosphere or vacuum at 850°C for homogenization heat treatment for 6 hours, hot rolling is started at 850°C, and finally rolled at 550°C to form a strip with a thickness of 2.5mm, a width of 20mm, and a length of 300mm, and then cold rolled. The pass is 20%, the intermediate annealing temperature is 600°C, heating for 120 seconds, then heating at 800°C for 120 seconds for ice water quenching, aging at 400°C for 4.5 hours, and then cold rolling to a strip with a thickness of 1.5mm. Measured σ b ≥750Mpa, σ S ≥350Mpa, δ is 30%, A f = 125°C.

Embodiment 2

[0020] The alloy material of the invention obtained by magnetic suspension high-frequency induction melting has the following components: 10% Cu, 3% Ni, 3% Cr, 0.1% N, 0.5% Ti, and the rest is Mn. 1kg ingot is placed in a protective atmosphere or vacuum at 850°C for 6 hours of homogenization heat treatment, hot rolling is started at 850°C, and finally rolled at 550°C to form a strip with a thickness of 1.5mm, a width of 20mm, and a length of 300mm, and then cold rolled. The pass is 20%, the intermediate annealing temperature is 600°C, heating for 120 seconds, then heating at 800°C for 120 seconds for ice water quenching, and finally aging at 400°C for 4.5 hours, and then cold rolling to a strip with a thickness of 1.5mm. Measured σ b ≥550Mpa, σ S ≥250Mpa, δ is 35%, A f = 155°C.

Embodiment 3

[0022] The alloy material of the present invention is smelted by atmospheric medium frequency induction in a ceramic crucible, and its composition is: 35% Cu, 5% Ni, 3% Cr, 0.1% N, 0.5Ti%, 0.1Sn%, 0.1Sb%, and the rest is Mn. 1kg ingot is placed in a protective atmosphere or vacuum at 850°C for 6 hours of homogenization heat treatment, hot rolling is started at 850°C, and finally rolled at 550°C to form a strip with a thickness of 1.5mm, a width of 20mm, and a length of 300mm, and then cold rolled. The pass is 20%, the intermediate annealing temperature is 600°C, heating for 120 seconds, then heating at 800°C for 120 seconds for ice water quenching, and finally aging at 430°C for 4 hours, and then cold rolling to a strip with a thickness of 1.5mm. Measured σ b ≥850Mpa, σ S ≥450Mpa, δ is 25%, A f =5°C, 4% superelastic deformation at 18°C, and 0.3% residual deformation.

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PUM

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Abstract

The invention provided a high strength, plasticity and damping Mangonic. It is proper to make the propeller of the naval vessels and the ship craft, the anti-chatter bushing, the muffler shell, the memory function parts, glass frame, the medical silk guide, surgical sutures. The weight ratio of the composition is Cu 5.5-50%, Ni 1-10%, Cr 1-10%, N 0.05-0.5%, the residue is Mn. The alloy smelt to cast ingot by the median or high frequency atmospheric casting in the ceramic crucible, argon shield or the magnetic suspension smelting and the Ohno Continue Castings. The alloy has the high yield strength, good memory ability, hyperelastic and not easy to rustiness.

Description

Technical field: [0001] The invention relates to a memory alloy, in particular to a manganese-based memory alloy with high strength, high plasticity and high damping and a preparation method thereof. It is especially suitable for making ships, propellers, anti-seismic bearings, silencer housings; parts with memory functions, such as temperature and force sensitive elements, spectacle frames, medical guide wires, surgical sutures, etc. Background technique: [0002] Since the discovery of nickel-titanium memory alloys in the United States in the 1970s, copper-based memory alloys and iron-based memory alloys have appeared successively, and can be practical and industrialized. Nickel-titanium memory alloy is the most successful application due to its excellent memory performance and superelasticity. But its resources are scarce, expensive (600-20,000 yuan per kilogram), and the production process is complicated and difficult. When used in medical and health care, the dissoluti...

Claims

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Application Information

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IPC IPC(8): C22C22/00C22C1/02C22F1/16B21B37/74
Inventor 董元源周宏雷张良李光玲
Owner JIANGYIN POLYTECHNIC COLLEGE
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