FUNCTIONAL CU-ZN-AL ALLOY

摘要

PURPOSE:To obtain a functional Cu-Zn-Al alloy with especially stabilized temp. sensitivity and enhanced resistance to thermal fatigue due to repeated use, by adding a specified precentage of Fe and/or P to a Cu-Zn-Al alloy and by alloying them. CONSTITUTION:0.01-1.0% Fe, 0.01-0.05% P and/or 0.01-0.1% B are added to a Cu-Zn-Al alloy consisting of 68-72% Cu, 2.8-4.5% Al and the balance Zn to obtain a functional Cu-Zn-Al alloy. This alloy is a shape memory alloy contg. martensite having <=500mum, especially <=100mum average grain size. This shape memory alloy has remarkably improved temp. sensitivity, shape restoring power and fatigue resistance. Unsatisfactory shape restoring power and fatigue resistance are considered to be the maximum defects of a convertional alloy.