亚共晶的

It is found that atomic densities of hypo-eutectic alloy increased and coordination number decreased with Si% rising, and there was a maximum of atomic density at eutectic composition.

发现在亚共晶成分范围内，随着Si量的升高，合金熔体原子密度升高，配位数下降，合金的原子密度在共晶处达到极大。

The microstructures of hypoeutectic and hyper-eutectic Al-Cu and Al-Si alloys solidified at high pressure (5 GPa) were investigated.

研究了亚共晶或过共晶Al-Cu和Al-Si合金在5 GPa压力条件下凝固的显微组织特征。

The influence of parameter of the inclined cooling plate to semi - solid structure of hypoeutectic high chromium was studied.

采用倾斜板冷却体法对亚共晶高铬铸铁进行半固态成形，主要研究倾斜板参数对亚共晶高铬铸铁半固态组织的影响规律。

Experiments show that the formation of tertiary dendrite depends strongly on the alloy type and alloy content. It is hard to form tertiary dendrite for hypoeutectic but easy for hypereutectic.

试验表明，三次枝晶的形成强烈依赖合金类型和合金成分，亚共晶的Pb-Sn合金很难形成三次枝晶，而过共晶的Pb-Sn合金则易于形成三次枝晶。

Influence of pouring temperature on the size and shape of primary austenite in semi-solid hypoeutectic high chromium cast iron was studied.

利用倾斜板冷却体法制备了亚共晶高铬铸铁半固态浆料，并且研究了不同浇注温度对半固态亚共晶高铬铸铁初生奥氏体的影响。

With the same Fe and Mn content, the primary iron phase in the hypoeutectic alloys is obviously less than that in the eutectic alloys, and α iron phase will form a kind of thin dendrite structure in α-Al dendrite crystal and will have strengthen effect.

在同样的铁锰含量下，亚共晶铝矽合金中的初生铁相明显比共晶合金要少，且α铁相在α铝树枝晶中会形成一种细密的树枝晶结构，可以作为基体的强化相。

The current theory and application of Al-Si alloy mainly focus on the study of hypoeutectic and eutectic, therefore we systematically analyzed the modification process of hypereutectic Al-Si alloy based on the methods and results of predecessors. Several factors including the modification temperature, the content of modifier, the available holding time, the times of repeat melting , the casting temperature and the speed for cooling have been studied in order to understand its effects to the composition, function and performances of primary silicon and eutectic silicon.

中文摘要本文针对目前Al-Si合金相关应用和理论的研究多集中于亚共晶和共晶合金的情况，在前人的研究成果和研究方法的基础上，对过共晶Al-Si合金变质处理进行了较为系统的分析，研究了变质剂的成分配比、变质温度、变质剂的加入量、变质后的静置时间、浇注温度及冷却速度等因素对过共晶铝硅合金中初晶硅和共晶硅的大小、形状、数量和分布的影响。

The eutectic temperature and the amount of proeutectic austenite dendrites are essentially unchanged with the variation of solidification rates in hypoeutectic white iron.

随凝固速度增加，亚共晶灰铸铁的共晶温度下降，初生奥氏体枝晶的数量和发达程度随之增加。

The current theory and application of Al-Si alloy mainly focus on the study of hypoeutectic and eutectic, therefore we systematically analyzed the modification process of hypereutectic Al-Si alloy based on the methods and results of predecessors. Several factors including the modification temperature, the content of modifier, the available holding time, the times of repeat melting , the casting temperature and the speed for cooling have been studied in order to understand its effects to the composition, function and performances of primary silicon and eutectic silicon.

本文针对目前Al-Si合金相关应用和理论的研究多集中于亚共晶和共晶合金的情况，在前人的研究成果和研究方法的基础上，对过共晶Al-Si合金变质处理进行了较为系统的分析，研究了变质剂的成分配比、变质温度、变质剂的加入量、变质后的静置时间、浇注温度及冷却速度等因素对过共晶铝硅合金中初晶硅和共晶硅的大小、形状、数量和分布的影响。

The sliding wear behaviors under lubricating of hypoeutectic, eutectic and hypereutectic Al-Si alloys are investigated.

研究了亚共晶、共晶、过共晶 Al-Si 合金在润滑条件下的磨损行为，探讨了三类合金的磨损失效机理，得出提高Si含量是提高 Al-Si 合金耐磨性的有效途径。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了