一次结晶
- 网络primary crystals
![一次结晶](../cache/1173957.jpg)
-
这种两区域模型与三区域模型结晶模型的区别在于:在铸件的一次结晶过程中,铸件断面上不同时出现固相、固液相、液相三区域共存的状态。
This model is distinguished from the three-region crystal model in the process of primary crystals , in which not all exiting solid , liquid-solid , and solid at the same time on sections of casting .
-
研究了钼酸钠溶液在不同的pH值下,其一次结晶率与产成品纯度的关系,导出了钼酸钠生产的最佳控制工艺条件。
The article introduces the relation between first crystal rate of sodium molybdate solution and its crystal purity at different pH-value , and consequently presents the optimum condition of process control for the production of sodium molybdate .
-
文中用液淬法研究了耐热球墨可锻铸铁的一次结晶过程,用定量图像分析仪研究了石墨的析出量,用X射线探伤仪研究了形成缩孔缩松的倾向。
This article use the way of liquid hardening to study its first crystallization , use quantitative image analysis to study the quantity of indigenous graphite , use X-ray defectoscopy to study the tendency of shrinkage cavity and porosity forming .
-
实验结果表明:以水作为外相,采用HLB值大于18的复合型乳化剂,经一次结晶所得精萘的结晶点大于79.6℃,精萘质量符合国家一级精萘标准,精萘产率在90%左右。
The results show that when the mixed emulsifiers ( HLB > 18 ) is used and water as ex-ternal phase , the solidification point of pure naphthalene are higher than 79.6 ℃ and the yield of pure naphthalene are about 93 % .
-
铸造锌铝合金的一次结晶和组织特点
The primary crystallization and structure of zinc - aluminium foundry alloys
-
稀土在钢的一次结晶中的作用
Effect of Rare Earth Elements on Solidification Structure of Steels
-
模拟结果符合亚共晶球铁的一次结晶过程;
The result of the simulation is in accordance with the crystallization process .
-
亚共晶铸铁一次结晶过程的两区域结晶物理模型
A Two - Region Crystal Micro-Physical Model for the Primary Crystallization of Hypoeutectic Casts
-
熔核的一次结晶是点缝焊接头形成过程中的重要环节之一。
The primary crystal of molten metal is one of the important links in the process of spot and seamwelding joint .
-
研究了稀土氧化物对堆焊金属冲击韧度及一次结晶组织的影响。
The effect of rare earth ( RE ) oxide on impact toughness and primary structure of surfacing welding metal was investigated .
-
本文应用微分热分析液淬法研究了不同蠕化率蠕铁的一次结晶过程。
Using differentiated thermal analysis quenching method , the solidification process of CG cast iron with various percentage of compacted graphite particles is investigated .
-
实验结果表明,乙醇作溶剂一次结晶的萘产品结晶点为79.5℃,对苯并噻吩的脱除率为50%左右;
The results show that the solidification point of one step crystallization product is about 79.5 ℃ and half of the benzothiophene in crude naphthalene is removed .
-
电磁搅拌焊接方法,可以有效地细化焊缝一次结晶,减小焊缝金属的偏析程度,降低焊缝结晶裂纹和气孔的敏感性,提高焊缝金属的塑、韧性。
The electromagnetic stirring ( EMS ) is effective to refine the grain structure , homogenize the composition , reduce the susceptibility of weld solidification cracking and porosity , improve the ductility and toughness of weld metal .
-
由粗品一次萃取结晶的MC回收率超过92%。
Extracting and crystalling recovery of MC exceeds 92 % .
-
普通模铸造一次冷却结晶区的铸锭质量及影响
Quantity and Influences in the Casting Lies the First Area of Cooling and Crystallize in Common Mold
-
首次报道在微量非离子表面活性剂存在下,以3%~20%的乙醇一次快速结晶药用甘氨酸α晶体的工艺。
A new technical method of purifying the medicine glycine α crystal using nonionic surfactant and alcohol of concentration from 3 % to 20 % as crystallization solution was reported .
-
考虑一道次动态再结晶的二道次热轧仿真
FEM simulation of hot rolling process in the second pass considering dynamic recrystallization in the first pass
-
一道次动态再结晶的发生可显著消除一道次热变形产生的加工硬化,二道次热轧变形应力降低。
Dynamic recrystallization behavior during the first hot working can significantly eliminate work-hardening and the stress of second hot rolling is lower . 4 .