为提高Al-12Si合金的热变形抗力,并探索非晶Fe粉掺杂对Al-12Si合金热压缩行为的影响和掺杂非晶Fe粉热压缩中的晶化温度等,采用连续挤压技术制备了掺杂10wt%非晶Fe粉与不掺杂非晶Fe粉的Al-12Si合金试样,对试样进行了不同温度和应变速率下的热压缩试验,分析了试样在热压缩中的组织转变,以及采用双曲正弦关系构建了试样的热流变应力方程。结果表明:非晶Fe掺杂试样在450℃及以下的热压缩时,Fe维持非晶态,500℃时,则已发生晶化;掺杂10wt%非晶Fe粉使Al-12Si合金的热抗变形能力显著提高,其热压缩激活能Q=211. 29 k J/mol,比未掺杂非晶Fe粉的Al-12Si合金试样高40. 78 k J/mol,且热压缩过程中存在动态回复和动态再结晶;利用双曲正弦关系构建试样的热流变应力方程为■,线性回归系数高达0. 99,即可为非晶Fe粉掺杂试样的热加工提供一定的理论指导。
Heavy metals in disused batteries have many threats to the health and living environment ofhuman beings.This article describes the kinds and components of batteries-investigates the metal recyclingvalues in disused batteries, The environmental pollution caused by all kind of battery was analysed, the situationof recovery and handing the waste battery both here and abroad were reported and the countermeasures to fatherthe battery pollution were put forward according to our national situation.
