摘要
成分为Cu-0.1%Fe-0.03%P(TFe0.1)的引线框架铜合金连续铸坯经热轧成厚15 mm宽60 mm的带坯,之后进行固溶-冷轧变形-时效处理和在线固溶-冷轧变形-时效处理,冷轧变形量为85%,90%和95%,在此基础上测试了合金的拉伸力学性能和电导率,用金相和透射电子显微分析研究了不同处理态合金的微观组织结构及其变化。结果表明,合金热轧后在线固溶-95%冷轧变形-500℃/2h时效处理是TFe0.1合金比较好的形变热处理工艺,在此条件下,合金的抗拉强度、屈服强度、延伸率和电导率分别为258,192 MPa,22.5%和86.0%IACS,合金的显微组织结构为固溶体基体和弥散分布的第二相颗粒,析出强化和亚结构强化是TFe0.1合金强化的主要原因。
An Cu-0.1%Fe-0.03%P （TFe0.1）alloy used for lead frame was prepared by using continuous melting and hot rolling. Then the hot-rolled alloy was treated by solution-cold roll-aging and online solution- cold roll-aging, the deformation ratio was 85%, 90% and 95 %, respectively. The effects of solution mode and deformation ratio on mechanical and electrical properties of the alloy was studied, the microstructure of the alloy were also studied by metallograph and TEM. The result showed that the optimum treatment was proved to be online solution treatment followed by 95% cold-rolling and then aging at 500 ℃ for 2 h, under which the tensile strength, yield strength, elongation and electrical conductivity is 258, 192 MPa, 22.5% and 86.0%IACS, respectively. The microstructure of this alloy was observed to be sosoloid matrix and second-phase dispersion. Precipitation strengthen and substructure strengthen were the prime strengthening reasons of studied alloy.
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2007年第3期289-292,共4页
Chinese Journal of Rare Metals
基金
国家自然科学基金资助项目(50371106)
中南大学博士生创新基金资助项目
