摘要
用热型连铸法制备直径1.2mm的柱状晶Cu-Al-Be丝,并对其弯曲疲劳性能、冷加工性能及冷加工后热处理组织的变化进行了研究.试验结果表明:热处理后,试样的弯曲疲劳次数达16万次以上,最大拉伸应变量可达40%以上;冷轧变形量约40%时,合金组织发生马氏体相变,合金失去超弹性,经热处理后有所恢复,但最大应变只能达到1%.
The Cu-Al-Be super-elastic wires are produced by heated mold continuous casting process and tested by cyclic bending, tensile, and rolling experiments to study their fatigue property, cold working properties and microstructure after cold working. The results are as follow： The bending fatigue lifetime reaches 168,480 cycles after heat treatment. The maximum elongation rate is 42%. When the reduction rate reaches 40% through cold rolling, martensitic transformation occurs and the super-elasticity of wires decreases, accordingly the maximum strain reaches only 1% even after the heat treatment.
出处
《材料研究与应用》
CAS
2007年第2期118-121,共4页
Materials Research and Application
关键词
热型连铸
Cu—Al-Be
超弹性
马氏体相变
heated mold continuous casting
Cu-Al-Be
super-elasticity
martensitic transformation
