Effect of NaCl and LiF on liquidus temperature of molten cryolite-based aluminum electrolyte;
NaCl和LiF的添加对铝电解质初晶温度影响的研究
Study on new device for testing liquidus temperature of aluminium electrolyte and mathematical model of liquidus temperature;
铝电解质初晶温度测定装置及初晶点数模的研究
Study on direct determination of liquidus temperature of aluminium electrolyte;
直接测定铝电解质初晶温度的研究
Control of the size of primary silicon in wrought Al-Si alloy;
Al-Si系变形铝合金初晶硅尺寸的控制
Morphologies of primary silicon particles have significant influences on properties of hypereutectic Al-Si alloys, therefore the nucleation and growth mechanism and morphologies evolution mechanism of primary silicon particle have been widely investigated and become a major issue.
初晶硅形态对高硅铝合金性能具有重要影响,其形核长大机制、形态演化机制是高硅铝合金的主要研究内容之一;尽管已有诸如变质剂处理、半固态搅拌、快速凝固、电脉冲处理等可改善初晶硅形貌的方法,但目前要完全实现控制初晶硅形态并使之球化,使用现有工艺较为困难。
The influences of trace addition of Na, Sr, or P on the nucleation and growth of primary silicon in Al22%Si alloy fabricated by high pure aluminum and silicon, in which the primary silicon mainly appeared in five petal starshaped morphology, were studied.
在高纯原料配制的、以五瓣星状初晶硅形态为主的Ａｌ－２２％Ｓｉ高硅过共晶合金中加入少量的Ｎａ、Ｓｒ、Ｐ变质或细化元素，考察了它们对初晶硅形态的影响。
Effects of P Modification on Primary Si in Hypereutectic Al-Si Die Casting Alloy with Different Cooling Rates;
P变质对不同冷速下过共晶压铸铝合金初晶Si的影响
Effects of Magnetic Field and Modification on Primary Si Morphology and Distribution;
磁场和变质处理对初晶Si形状和分布的影响
Strong magnetic field method was adopted to solve the problems,such as the loss of efficiency after re-melt,the short effective time after Na modification,and the primary Si distributed unevenly after P modification.
为解决Al-Si合金存在的Na变质重熔失效和有效时间短及P变质处理后初晶Si偏聚问题,利用施加强磁场的方法,分别对亚共晶Al-6%Si合金和共晶Al-12。
Influence of rare earth and Ni content on the primary crystallization of Al-Gd-Er-Ni metallic glass;
稀土和镍含量对Al-Gd-Er-Ni金属玻璃初晶化的影响
The influence of Be replacement for Al on the glass forming ability(GFA)and primary crystallization of Al85Gd7Ni8alloy was investigated.
研究了Be部分替代Al对Al85Gd7Ni8合金的玻璃形成能力和初晶化的影响。
The quantity of primary Si increases obviously and its average grain size decreases to about 35 μm.
1%时即能达到理想的变质效果,使其初晶硅颗粒明显增多,平均颗粒尺寸下降到35!m左右;最佳变质温度为825℃左右;变质效果长效稳定,有着广阔的应用前景。
The primary Si formed in the melt are gradually changed from elongated platelets to polyhedral shapes.
试验结果表明 :机械搅拌使初晶硅在剪切力作用下发生弯曲和破碎 ,并相互碰撞、集聚、合并长大 ,由板片状向多面体形转变 ;在固液两相区进行变温机械搅拌 ,冷却速度对初晶硅的颗粒直径有着重要的影响 ,随着冷却速度的增大 ,初晶硅的颗粒直径减小 ,当冷却速度为 5℃ / min时 ,初晶硅的颗粒直径小于 45μm,同时出现近球形的α相 ,获得了非常理想的半固态组
In this study, a novel Al-Si-P master alloy has been successfully prepared to modify and refine primary Si in eutectic and hypereutectic Al-Si alloys.
该中间合金含有大量AlP颗粒,加入到共晶和过共晶Al-Si合金中后,分别起到促进初晶硅析出和细化初晶硅的作用。