摘要
采用微合金化及热机械处理的方法研制了新型的引线框架用Cu-Fe-Zn-P-Mg-Cr-RE(C194RE)铜合金,优化了该合金板材的热加工工艺,获得了优良的合金性能。采用扫描电镜、透射电镜、拉伸试验及硬度测试等研究了合金在不同加工工艺下的显微组织及性能。结果表明:在其它实验条件一致的情况下,热轧后经在线淬火的合金的各项性能均高于热轧后自然冷却的合金的性能。热轧后经在线淬火的合金的抗拉强度可达560MPa,伸长率达到8.2%,硬度达175HV,电导率为73%IACS。热轧后经自然冷却的合金经热机械处理后,析出相粒子较大,分布也不均匀;而经在线淬火的合金的析出相粒子细小,尺寸为5～20nm,弥散地分布于基体中,析出强化效果显著,并且合金的电导率也较高。
A new C194RE copper alloy was prepared by alloying and thermomechanical treatment process. The hot processing technique of the alloy was optimized.The optimum properties of the alloy were obtained.The microstructure and mechanical properties were investigated by SEM, TEM, tensile test and hardness test. The results show that the alloy of on-line quenching after solution treatment presents much better properties compared with that of natural cooling under the same testing condition. The tensile strength, elongation, vicky hardness and electrical conductivity of on-line quenched alloy is 560 MPa, 8.2%, 175 HV and 73%IACS, respectively. After thermomechanical treatment, the natural quenched alloy has coarser precipitates and its distribution is inhomogeneous. On contrary, the alloy of on-line quenched after solution treatment has fine precipitates and well-distributed in the matrix, and the average size of the precipitates is about 5-20 nm,which strongly enhance the mechanical and electrical properties of the alloy.
出处
《热加工工艺》
CSCD
北大核心
2007年第8期12-14,17,共4页
Hot Working Technology
基金
中铝科技发展基金资助项目(2004KJA10)
