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Copper-aluminum-manganese-beryllium memory superelasticity alloy and producing method thereof

A technology of superelastic alloys and production methods, which is applied in the field of memory alloys and can solve problems such as high prices, low superelasticity, and poor memory capacity

Inactive Publication Date: 2008-01-09
江阴鑫裕装潢材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nickel and titanium are strategic materials, and the current price is soaring, reaching 300-400 yuan per kilogram
Moreover, the production process is complicated and the cost is high; the traditionally produced copper-based alloys include: copper-zinc-aluminum, copper-aluminum-nickel, copper-aluminum-beryllium, copper-aluminum-manganese
The main disadvantage of copper-zinc-aluminum alloys is that the phenomenon of memory decay is serious; other copper-based alloys produced by smelting and rolling form coarse grains and polycrystals, and the direction of performance varies greatly, resulting in grain boundary fractures with weak strength perpendicular to the stress direction , the mechanism that causes low plasticity and low superelasticity, the performance is very brittle and difficult to shape, such as cold drawing or cold rolling sheet; the latest copper-aluminum-manganese alloy has better plasticity, but the memory superelasticity is insufficient, memory superelasticity The deformation is between 1 and 3%. The copper-aluminum-beryllium alloy has good memory superelasticity, but it is very brittle and cannot be cold-drawn and cold-rolled. The main problem of iron-based alloys such as FeMnSi is poor memory ability and no two-way memory
In addition to expensive nickel-titanium memory alloys, other alloys are currently limited in application

Method used

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  • Copper-aluminum-manganese-beryllium memory superelasticity alloy and producing method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Using ZG25 vacuum electric furnace, under the pressure of -0.1MPa argon, melt 150mm CuAlMnBe memory super-elastic master alloy ingot to get ingot. The analysis composition of memory super-elastic master alloy ingot is Al10%, Mn8%, Be0.3% , the remainder is Cu;

[0018] Using hot-type continuous casting technology, the ingot is drawn into 1.6mm wire semi-finished products, as shown in Figure 1.

[0019] The heat treatment of the semi-finished wire material is as follows: homogenize at 860-920°C for 10 hours ± 0.5 hours, then cool in the air, then keep warm at 880-900°C for 100-150 seconds per mm effective thickness of the sample, and quench in water below 30°C —— followed by aging precipitation at 550-650°C for 20-100 seconds per mm of sample effective thickness; ——finally, heat preservation at 750-880°C for 20-100 seconds per mm of sample effective thickness. The obtained finished wire with 1.6 has a superelastic memory deformation of 25%. The price of raw material...

Embodiment 2

[0021] Use a ZG25 vacuum electric furnace to melt 150mm CuAlMnBe superelastic memory alloy ingot under the hydrogen pressure of -0.1MPa. The analysis composition of the memory superelastic master alloy ingot is Al 11%, Mn6%, Be0.35%, and the remainder is Cu. Homogenize the ingot at 850°C for 10 hours, cut off the skin, hot-roll it at 750°C to form a 6mm round wire, and then hot-draw it at 650°C to form a 1.6mm wire. After heat treatment, the finished product is 1.6 mm wire has an elongation of 13% and a superelastic deformation of 4%.

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Abstract

A super-plastic memory alloy of Cu-Al-Mn-Be and its production are both disclosed herewith. It contains Al 8-14%, Mn 3-22%, Be 0.2-0.6%, and balanced with Cu, produced by: smelting in a continuous casting resistance furnace in presence of Ar with -0.04--0.1Mpa to obtain ingots, drawing into wires or plates or sections, at 30mm / min minus or plus 5mm and mouth temperature of 1020 deg.C minus or plus 10 deg.C, with distance between the mouth and cooling water of 100L / h minus or plus 50L / h, and heat treating. It has 10-30% specific elongation and 6-25% super-elasticity higher than traditional NiTi alloy.

Description

technical field [0001] The invention relates to a memory superelastic functional alloy, in particular to a copper-aluminum-manganese memory superelastic alloy and a continuous casting production method thereof. Memory superelastic functional alloys are especially suitable for manufacturing imitation gold spectacle frames, mobile phone antennas, medical sutures, medical organ supports, memory sensing elements for force and temperature, intelligent composite materials, and so on. It belongs to the technical field of memory alloy. Background technique [0002] The memory superelastic alloys produced by traditional technology today include nickel-titanium alloys, copper-based alloys and iron alloys. Nickel-titanium alloy memory superelastic performance is higher, up to 4 to 8%. However, nickel and titanium are strategic materials, and the current price is soaring, reaching 300-400 yuan per kilogram. Moreover, the production process is complicated and the cost is high; the tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/01C22C9/05C22C1/02B22D21/00B22D11/16C22F1/08
Inventor 董元源陈继忠
Owner 江阴鑫裕装潢材料有限公司
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