Novel production method of copper-aluminum-manganses-beryllium memory hyperelastic alloy

Abstract

The invention relates to a method for the heated mold continuous casting production of a novel Cu-Al-Mn-Be memory hyper-elastic alloy. The invention is characterized in that the alloy is composed of the following alloying elements by the weight percentages as follows: Al 8-14%, Mn 3-11%, Be 0.2-0.6% and Cu in balancing amount. The method mainly includes the following technical steps: a Cu-Al-Mn-Be memory hyper-elastic mother alloy is ingoted in a smelter and smelted in the presence of argon gas under the pressure of -0.04Mpa to -0.1Mpa, so as to obtain a Phi 120 round ingot; the ingot is subjected to uniform heat treatment at 840 DEG C-860 DEG C for 9.5h-10.5h, hot-rolled into wire material, sheet material or belt material at 740 DEG C-760 DEG C, then hot-drawn into thread material semi-finished products at 645 DEG C-655 DEG C; and the thread material semi-finished products is subjected to heat treatment for obtaining the finished product thread material. The Cu-Al-Mn-Be memory hyper-elastic alloy produced by the method has good plasticity and high memory hyper-elastic capability.

Description

Technical field 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. The memory super-elastic functional alloy is particularly suitable for manufacturing imitation gold spectacle frames, mobile phone antennas, medical sutures, medical organ stents, force and temperature memory sensor elements, smart composite materials, and so on. It belongs to the field of memory alloy technology. Background technique There are three types of memory superelastic alloys produced by traditional technology today: nickel-titanium alloys, copper-based alloys and iron alloys. Nitinol alloys have high memory super-elastic properties, up to 4-8%. However, nickel-titanium is a strategic material, and the current price is soaring, reaching 300-400 yuan per kilogram. Moreover, the production process is complex and the cost is high; the traditionally produced copper-based al...

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 or rolled. The main problem of iron-based alloys such as FeMnSi is poor memory ability and no double memory.

In addition to expensive nickel-titanium memory alloys, other alloys are currently limited in application

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