Cu-0.81Cr-0.12Zr-0.05La-0.05Y合金形变与热处理工艺优化

Optimization of heat treatment and deformation process of Cu-0.81Cr-0.12Zr-0.05La-0.05Y alloy

对稀土微合金化Cu-0.81Cr-0.12Zr-0.05La-0.05Y合金的形变与热处理工艺进行了研究。结果表明,优化加工工艺为铸锭经1193 K温度均匀化退火60 min后热轧,然后于1223 K温度固溶处理60 min后快淬至室温进行应变为60%的冷变形处理,最后再于773 K温度时效60 min。经过这样处理的试样,具有良好的综合性能,其显微硬度和导电率分别达186 HV0.1和81%IACS。试样未经冷变形处理,显微硬度和导电率则分别为140 HV0.1和80%IACS,相比之下,时效前对试样施以20%-80%应变的冷变形,可明显提高合金力学性能达20 HV0.1以上。

Deformation and heat treatment process of Cu-0.81Cr-0.12Zr-0.05La-0.05 Y alloy with the addition of rare earth elements were investigated.The results show that the optimized process parameters are as follows： homogenizing the alloy ingot at 1193 K for 60 min before hot rolling,solid solution treating at 1223 K for 60 min,followed by cold rolling the plate by 60% strain,and then aging at 773 K for 60 min.The obtained alloy has a good combination of microhardness and electrical conductivity： they are as high as 186 HV0.1 and1% IACS,respectively.The microhardness and electrical conductivity of the alloy un-deformed are 140 HV0.1 and 80 % IACS,respectively,indicating that 20%-80% cold rolling prior to aging can significantly improve the mechanical properties of the alloy.