查询词典 solidification

The results show that, when the electromagnetic field was applicated, the flowability and filling capacity of cupronickel alloy are increased, the surface cracks are eliminated, and the thin-walled cupronickel tube billets with smooth surface can be obtained due to the increase of flowability and filling capacity of cupronickel alloy. The solidification structure of the tube billets is evidently refined, the shape of Ni-rich phase changes from needle-like to bulk and the casting stress declines from 7.2 to 0.32 MPa. With the structure improving, the tensile strength and elongation increase by 5% and 36%, respectively, than those of ordinary continuously cast tube billets.

结果表明：在连铸过程中施加旋转电磁场能够提高金属液的流动性和充型能力，消除表面裂纹缺陷，从而制备出表面光滑的薄壁白铜管坯；在电磁力的作用下管坯凝固组织显著细化，富镍相由针状转化为团块状，同时铸造应力由未施加电磁场时的7.2 MPa下降至0.32 MPa；随着凝固组织的改善，施加磁场的管坯抗拉强度和伸长率与未施加磁场管坯的相比分别提高5%和36%。

In the simulation, the flow rule of melt metal in mold of horizontal continuous casting with electromagnetic stirring is measured using ultrasonic Doppler velometer, and the result is inter confirmed with the solidification characteristics is tics of zinc cupronickel thin slab in industrial product, some advantageous results are obtained that, when the current is 400 A the inner micro-pores disappear, when the current is 500 A the center equiaxed crystal layers occur and when the current is to 800 A the inner-segregation decreases to zero.

在模拟实验中，用超声波多普勒测速仪测量该电磁搅拌下水平连铸结晶器内金属液的流动规律，并与生产实验中锌白铜板带的凝固特征相互印证，发现搅拌电流达到400 A时，板带内部气孔消失，电流达到500 A时板带出现等轴晶带，电流达到800 A时板带坯偏析率趋于零。

The solidification mode evolving regulars of ZA42 in different current intensity was studied in this paper.

研究了ZA42合金在不同电流强度作用下凝固方式的演变规律。

The results show that the current pulse voltage and frequency on the solidification structure optimization have a best value.

研究了不同参数的脉冲电流对Q235钢凝固组织的影响，结果表明：脉冲电流的电压和频率对凝固组织的优化有一最佳值。

Effects of pulse electric current on directional solidification structure of Al-4.5Cu alloy have been observed.

研究了脉冲电流对Al-4.5Cu合金定向凝固过程及组织的影响。

The influence of high density pulse electric current on the solidification structure of hypereutectic Al-19Si alloy was studied.

摘 要：研究了高密度脉冲电流对过共晶Al-19Si合金凝固组织的影响。

On this basis, the solidification behavior of decagonal quasicrystal in the undercooled Al72Ni12Co16 alloy melt, such as nucleation and growth mechanism, was systematically investigated.

本文的主要研究内容及获得的结论如下：(1)采用惰性形核涂层技术和循环过热的方法，使Al_(72)Ni_(12)Co_(16)合金熔体最大获得了180K的高过冷度。

Dendrite growth is one of main solidification types of metals and alloys.

树枝晶生长是金属凝固的一种主要形式。

The quantitative relationship between secondary dendrite arm spacing and solidification cooling rate of AZ91 was obtained by regressive analysis.

用数学回归的方法得到了AZ91镁合金的凝固冷却速度与二次枝晶间距的定量关系式。

The four conditions are as follows: the molten alloy only with the addition of deoxidant during melting; only applying high-density pulse electric current on castings during solidification; compound addition of grain refiner and sodium modifier, and addition of borax r modifier liquid along with applying pulse electric current during melting.

这4种工艺条件分别为：在合金液熔炼过程中，除了加脱氧剂外不做任何处理；凝固过程中单独施加高密度电脉冲；添加晶粒细化剂和钠盐变质剂混合剂，或者添加硼砂变质细化剂，并施加高密度电脉冲。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。