摘要
对传统冷却斜板铸造法进行了改进,在冷却通道上设置振动源对Sn-15wt%Pb熔体施加机械振动,并以表观晶粒形态和尺度来描述凝固组织特征,研究工艺参数对凝固组织的影响。结果显示:对冷却通道施加振动可以改变表观晶粒形态和特征尺度;较高的振动加速度有助于表观晶粒细化;较高的冷却速率有助于减小表观晶粒特征尺度,但其形态圆整度降低。
A modification for the cooling slope casting technique is presented by adding vibration source to the chilling path to impose mechanical vibration on the Sn-15% Pb molten metal, and the effects of the processing parameter on the solidified microstructure, whose character was described with apparent grain morphology and scale, were studied. The results show that： vibration imposed on the chilling path can change the apparent grain morphology and characteristic scale; higher vibration acceleration leads to finer apparent grain; and higher cooling rate decreases the characteristic scale but in the same time reduces the spheroidicity of the apparent grain morphology.
出处
《铸造技术》
CAS
北大核心
2007年第3期359-362,共4页
Foundry Technology
