摘要
在中频感应炉中采用大气熔铸法制备了CuCr25RE合金触头材料,利用扫描电镜对其铸态、锻态和固溶态的显微组织进行分析,测定了时效和变形量对电导率和显微硬度的影响。结果表明,CuCr25RE合金经锻造后可以获得均匀的组织;在950℃×1h固溶440℃时效6h可获得较好的综合性能;固溶后经40%冷变形在440℃时效2h后,电导率和显微硬度分别可达61%IACS和172HV,比固溶后直接时效分别高出11%IACS和23HV。
The CuCr25RE alloy contact material was prepared by melting and casting method in intermediate frequency induction furnace. The microstructure of CuCr25RE alloy after casting and forging were observed by scanning electron microscope, and the electrical conductivity and microhardness after aging and deformation were measured as well. The results show that after forging, the Or phase distribute uniformly. The good combination of properties of CuCr25RE can be obtained after solution at 950 ℃ holding for lh and aging at 440 ℃ holding for 6 h the alloy. Through solution, 40% cold deformation and aging at 440 ℃ for 2 h, the electrical conductivity and the microhardness can reache 61% IACS and 172 HV respectively, which are 11% IACS higher in electrical conductivity and 23 HV in microhardness than those of alloy adopting aging after solution without deformation.
出处
《铸造技术》
CAS
北大核心
2007年第6期784-786,共3页
Foundry Technology
基金
河南省杰出青年基金(0512002700)
河南省高校创新人才培养工程(豫教高2005126)
关键词
大气熔铸
CuCr25RE触头材料
导电率
显微硬度
Melted in atmosphere
Cucr25RE contact material
Electrical conductivity
Microhardness
