Preparing method for fine grain CuAlMn shape memory alloy

The invention discloses a preparing method for a fine grain CuAlMn shape memory alloy and relates to a physical structure changing a copper-base alloy. The preparing method comprises the steps: preparing an Al-based LaScB nucleating agent thin strip; and preparing the fine grain CuAlMn shape memory alloy. By designing the new Al-based LaScB nucleating agent and using its nucleating and refining actions, the fine grain CuAlMn shape memory alloy of which the mechanical property is obviously improved while the high damping characteristic is kept is prepared, and the defects that the grain refining effect of the copper-base shape memory alloy in the prior art is insufficient, and the development trend of the current mechanical equipment to the requirements of high speed, efficiency, intelligentization and automation cannot be met are overcome. 本发明细晶CuAlMn形状记忆合金的制备方法，涉及改变铜基合金的物理结构，步骤是：制备Al基LaScB孕育剂薄带；制备细晶CuAlMn形状记忆合金。本发明通过设计新的Al基LaScB孕育剂，利用其孕育细化的作用，制备种在保持高阻尼特性的同时显著提高其力学性能的细晶CuAlMn形状记忆合金，克服了现有技术对铜基形状记忆合金进行晶粒细化的效果仍然