机械振动对纯铜凝固组织的影响  

Effect of Mechanical Vibration on Solidification Structure of Pure Copper

作　　者：杨志杰[1] 苍大强[1] 李宇[1] 宗燕兵[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083

出　　处：《有色金属》2011年第2期58-62,共5页Nonferrous Metals

基　　金：国家自然科学基金项目(50954004)

摘　　要：研究机械振动对纯铜凝固组织的影响,结果表明,在铜液的凝固过程中施加机械振动能够明显改善其凝固组织,但增大振幅的作用效果优于频率。试验得出频率为100Hz、振幅为10mm时对铜的凝固组织的改善效果最佳,等轴晶率及平均晶粒面积分别为32.90%和4.36mm2,同不施加机械振动的试样相比,等轴晶率增加到了1/3以上,平均晶粒面积减小了4倍以上。The effect of mechanical vibration on solidification structure of pure copper was researched.Experiment results show that the solidification structure of pure copper can be markedly improved through application mechanical vibration in the process of solidification of pure copper,but the effect of charging amplitude was better than charging frequency.The solidification structure is optimal for the industry pure copper when the frequency and amplitude are 100Hz and 10mm separately.Comparing with the sample of no application mechanical vibration,rate of equiaxed crystals increases to 1/3 from zero and the average area of crystals decreases by 4 times.

关 键 词：机械振动 纯铜 振幅 频率 

分 类 号：TG113.11[金属学及工艺—物理冶金]