摘要
研究了两种脉冲放电(简称PED)方式下Pb-60wt-%Sn合金的凝固组织,发现在大容量脉冲放电处理的条件下,富Pb初生相枝晶“破碎”,变成粒状晶;而在小容量高压连续脉冲放电处理的条件下,共晶晶粒沿电极方向拉长,共晶片沿电极方向生长,并且共晶片间距减小。最后,本文对脉冲放电影响金属凝固组织的机制进行了探讨。
The solidification structure of Ph-- 60wt%Sn alloy could be modified by two patterns of pulse electric discharging (PED). It is found that Ph--rich primary phase --dendritic is broken off into globular under PED with big capacitance,and under continuous PED with small capacitance and high voltage, the eutectic grains are pulled long along the electrods direction,the eutectic lamellars grow along the same direction and the lamellar spacing becomes small. Finally,the role played by PED on solidification structure has been discussed.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
1994年第6期1-4,共4页
Special Casting & Nonferrous Alloys
关键词
脉冲放电
共晶组织
凝固
铅锡合金
Pulse Electric Discharging
Globular Structure
Eutectic Structure