摘要
通过冷轧变形并结合中间退火制备了Cu-15Cr和Cu-15Cr-0.24Zr形变原位纤维复合薄板材料。采用扫描电子显微镜、拉伸试验机和电阻率测试仪研究了Zr及退火温度对Cr纤维形貌、合金强度及导电性能的影响。结果表明:Cr纤维随退火温度升高依次发生:边缘球化、晶界开裂和纤维断裂;Zr的加入使Cr纤维球化、断裂行为延迟约100℃;Zr提高了复合材料的抗拉强度,并使其抗软化温度提高100℃;450℃时,Cu-15Cr的抗拉强度/导电率达到良好的匹配,为656 MPa/81.7%IACS,550℃时,Cu-15Cr-0.24Zr的抗拉强度/导电率达到良好的匹配,为722 MPa/81.3%IACS。
The Cu-15Cr and Cu-15Cr-0. 24Zr in-situ composites were prepared successfully by heavy cold rolling and intermediate heat treatment. The effect of Zr and heat treatment temperature on the Cr fibres morphology and properties of the composites were investigated by SEM, tensile and resistance tests. The results show that Cr fibre spheroidizing, grain boundary cracking and fibres fracture occurs successively with increasing annealing temperature. The temperature of fibre edge spheroidizing and fracture of Cr fibres rise 100 ~C by addition of Zr in the composites, and tensile strength and softening temperature of the composites are increased by adding Zr element. The softening temperature of Cu-15Cr-0.24Cr composites is enhanced by 100 ~C than that of Cu-15Cr composites. Cu-15Cr composites show an excellent combination of tensile strength and electrical conductivity after annealing at 450 ℃ , which are 656 MPa and 81.7% IACS, and Cu-15Cr-0. 24Zr composites show an excellent combination of tensile strength and electrical conductivity after annealing at 550 ℃ , which are 722 MPa and 81.3% IACS.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2012年第12期14-18,共5页
Transactions of Materials and Heat Treatment
基金
上海市教委创新项目(11YZ112)
上海市科委基础研究重点项目(10JC1411800)
上海市研究生创新基金项目(JWCXSL1101)
上海市教育委员会重点学科建设项目(J50503)
