凝固

As Hf is added into the alloy the volume fraction of γ/γ′eutectic is increased and the temperature range between solidus and liquidus is expanded, which may maintain the effective linkage of interdendritic capillary feeding channel, thus improving the resistance of DS castings to ...

铪的加入，增加了共晶γ/γ′的体积分数，扩大了凝固范围，改善了合金凝固后期的毛细补缩通道的联系，从而减轻了热裂倾向性。随着铪含量的提高，合金的中温持久性能，特别是中温横向持久性能有所提高。

The Ni5Zr with low melting point forms because of Zr-rich liquid film will be maintained below 1180℃, therefore, solidification range of the alloy widens by 80℃ and the intenyal between the temperature at which the interdendritie feeding action disappears and the solidus temperature enlarges by 60℃....

在凝固过程中富Zr的液膜保持到低于1180℃的温度，结果使合金的凝固范围扩大了80℃。使失去枝晶间补缩的温度与固相线的温度范围扩大了60℃。这是含Zr含金热裂倾向大的原因之一。

The results show that, in some sense, the influence of superheat of the melt on the solidified microstructure is caused by the variation of supercooling condition during the solidification process.

研究结果表明，熔体的过热对凝固组织的影响在某种意义上是通过改变凝固时的过冷条件来达到的。

Based upon this, the author puts forward that the supercooling solidification should consist three stages, i.

据此，提出深过冷凝固过程应包含形核、快速再辉和快速凝固三个阶段。

The results show that the undissolved silicon particles in the melt become the cores of primary silicon precipitated in solidification and there is a close relationship between the shape of primary silicon and undissolved silicon particles. The growth of silicon follows not only the twin plane re-entrant edge mechanism, but also layer mechanism as well. Meanwhile, the shape of primary silicon also relies on kinetic surroundings, such as the transmitting of solute. At higher overheating temperature, the shape of primary silicon becomes the star-shape and tree-shape.

结果表明：重熔过程中熔体中未溶解的硅相粒子，在凝固过程中可成为初生硅生长核心，并且未熔颗粒与初生硅形状之间存在明显对应关系；初生硅的生长机制不是惟一的，既可以以孪晶凹角机制生长，还可以以层状机制生长，初生硅最终形状还要取决于溶质传输等动力学环境；随着熔体过热温度的升高，凝固组织中初生硅形状由多边形向星形及树枝状转变。

Due to the change of graphite structure the solidification interface of vermicular graphite iron becomes cellular-like, and the solidification interface of nodular graphite iron is rather irregular.

因石墨结构的变化，蠕虫状石墨铸铁的凝固界面呈一种特殊的胞状形态，球状石墨铸铁的凝固界面极不规则。

When the pouring temperature is close to the liquidus temperature of AlSi7Mgalloy, the primary α-Alin the billets of AlSi7Mg alloy solidifies into spherical or nodular grainswhich are small and distributed homogeneously. In order to obtain non-dendritic semi-solidbillets,the appropriate pouring temperature is 615℃. The faster cooling rate,the melt flowing and largersolidification region induced by the near liquidus pouring temperature promotes theformation of spherical or nodular primary α-Al.

实验表明：当浇注温度接近液相线温度时，AlSi7Mg合金中的初生α-Al凝固成球状或粒状，晶粒细小，分布均匀；获得球状或粒状AlSi7Mg合金半固态坯料的最佳浇注温度为615℃；在接近液相线温度下浇注，较快的合金熔体冷却速度、浇注引起的合金熔体活动和大范围的同时凝固促使AlSi7Mg合金形成球状或粒状的初生α-Al组织。

The molecularmass of Gln49-PLA_2 is 13880.79, which shows myotoxicity, neurotoxicity and cytotoxicactivity, but lacks the phospholipase A_2 activity. The coagulant effects of Gln49-PLA_2 are investigated on human citrated plasma andfibrinogen.

Gln49-PLA_2对新鲜血浆和人纤维蛋白原的体外凝固作用结果表明：Gln49-PLA_2能够剂量依赖性地诱导新鲜的人血浆及纤维蛋白原溶液凝固。

Pseudo- oriented solidification microstructures have been found in the rapidly solidified iron disilicide ribbons, and lead to textured structures in the bulk b-FeSi2 based alloys, which means there exists some orientation relationship between the a- and b-FeSi2 phase.

实验发现，快速凝固FeSi2合金薄片粉末中存在伪定向凝固组织，它导致了热压后的b-FeSi2基合金块体材料中的织构。这表明FeSi2合金的a相和b相晶粒之间存在特定取向关系。

By eliminating excessive flow, Jeltrate, Jeltrate Dustless and Jeltrate Plus allow your patients a level of comfort that cannot be found in other alginate impression materials

它同时具有胡椒盒薄荷的口味，它能与其他任何通用的石膏材料相容，具有快速凝固和常规凝固，粉末状。

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