查询词典 solidification

Main results are listed as below: 1. In rapid solidification, when the cooling rate is over some critical value, the solidification system will become unstable in the sense of the nonequilibrium thermodynamics, a uncontinuous steady state jump phenomenon will occur, and this uncontinuous steady state jump can be understood as the glass transition.

主要得到了如下结果：(1)通过对快速凝固过程的动力学及热力学的分析，提出了非晶转变的分枝理论模型，结果表明，对一合金熔体，当冷却速度大于某一临界值时，凝固体系会出现非平衡热力学意义上的失稳而出现多定态分枝现象，这一多定态现象可以被理解为非晶转变。

Zirconia/graphite compound mold core was prepared by the coating, in which the silicon sol was used as binder and zirconia was used as refractory materials. The application feasibility of metal particles as a coolant in the solidification process was studied, and the application of metal particles as subsidiary coolant in the liquid metal cooling of directional solidification were analyzed and studied in this investigation. The conclusions can be drawn as follows: 1 The zireonia/graphite compound cores fabricated by brushing coating which was prepared by making silicon sol agglutinated zirconia as a refractory material were casteded at 800℃and 1000℃respectively, and the results show that the strength of the mold core is strong enough to meet the requirement of practical casting.

本文研究了以硅溶胶为粘结剂，氧化锆为耐火材料来制备氧化锆／石墨复合型芯的制备工艺；并分析了金属颗粒作为冷却剂在金属凝固过程中应用的可行性、金属颗粒的冷却能力以及金属颗粒作为辅助冷却剂在定向凝固的液态金属冷却法中的应用，得出以下结论：(1)以硅溶胶为粘结剂，氧化锆为耐火材料来配制涂料，采用刷涂石墨型芯的方法来制备的氧化锆／石墨复合型芯经800℃和1000℃实际浇铸实验，结果证明型芯的强度足够满足实际浇铸要求。

The results show that when an electromagnetic field with 1000 Hz frequency and 20 kW power is imposed, the surface roughness of hollow billets is decreased by 50%, the solidification structure is refined, the tensile strength is improved by 40%, and the elongation is improved by 50%, averagely; when the power is heightened to 30 kW, the solidification structure is coarsened and the mechanical properties are worsened.

研究结果表明：当施加频率为1kHz的电磁场时，空心管坯的表面粗糙度降低了约50％；当施加功率为20kW的电磁场时，空心铜管坯的组织得到细化，抗拉强度提高了约40％，延伸率提高了50%；当施加30kW的电磁场时，铜管坯组织粗化，力学性能下降。

It is found that the porosities are not only dependent on gas entrapment but also on early solidification of gates and pressure transfer in the solidification process.

结果表明，孔洞的产生不仅与气体卷入密切相关，而且与凝固过程浇道的早期凝固及压力传递有关。

The mass and energy change speed of the TiB2 coating paste for aluminum electrolysis during its solidification and carbonization process was studied by the DTG and DDTA, and a reasonable heating program of solidification and carbonization was established. On this basis, the effect of heating program on the properties of TiB2 cathode coating was investigated.

摘 要：采用DTG， DDTA等热分析手段，研究了高温固化、炭化过程中，铝电解用TiB2阴极涂层糊料的质量和能量的变化速率，制定了涂层的变速固化、炭化升温制度；在此基础上，研究了升温制度对TiB2阴极涂层性能的影响。

Based on analysis to solidification process, it was proposed a new kind of hot cracking theory which was called theory about solidification contraction and its compensation.

本文针对空心叶片类铸件薄壁和在定向凝固过程中横向收缩受阻的特点，设计了定向凝固合金热裂倾向性薄板工字型精铸试样，并提出了。。。

The hot cracking theory about solidification contraction and its compensation was thoroughly proved through experiments carried out for Al-Cu alloys in semi-eontinutive directional solidification vaecume device.

根据热裂纹形成的凝固收缩补偿理论，定义了反映合金热裂倾向的不可补缩温度区间、热裂倾向系数、凝固末期收缩速率和不可补缩长度等指标。

In order to obtain better directional solidification microstructure, the whole directional solidification technique needing crucibles

为了获得更好的定向凝固组织，需要在超高温超高真空定向凝固设备上进行有坩埚的整体定向凝固。

The model of the ductile iron solidification is set up according to the solidification property and influence factor.

针对球墨铸铁的凝固特点和影响球铁件收缩缺陷的因素，提出了封闭孤立收缩膨胀叠加法预测球铁缺陷，在CASTsoft凝固模拟软件基础上，分别用铸钢模块和采用封闭孤立收缩膨胀叠加法的球铁模块预测典型铸件缺陷。

The solidification step may be performed by any means known in the art other than by exposure of the etch-resist ink to actinic light and/or particle beam radiation sources.

的凝固步骤可能会以任何方式出名的艺术品，而不是由其他蚀刻曝光，抵制油墨作用光和/或粒子束辐射源进行。

Molecular Distillation is a kind of high vacuum distillation method, which is suitable for the separation of high boiling, heat sensitivity and viscidity products.

分子蒸馏技术是一种在高真空条件下进行的连续蒸馏过程，适合于分离高沸点、热敏性及具有生物活性的混合物。

They are to the Noughties what yuppies were to the Eighties .

那在六十年代是时髦的，但在八十年代肯定是过时了