凝固

The causes for its formation can be attributed to the periodic oscillation of growth rate in the vicinity of absolute stability velocity.

Mn二元合金，镍基合金(Ni-12.9W-7.2Cr-5.2Co-3.6Al-1.4Ti)和1Cr18Ni9Ti不锈钢三种材料在激光快速凝固下的组织形成与转化规律，得到了如下主要结论： 1。

The research in hot cracking reguarity of directionally solidified Rene125 alloys proved again the theory about solidification contraction and its compensation.

对涡轮叶片材料Rene 125合金定向凝固热裂规律性的研究再一次验证了热裂纹形成的凝固收缩补偿理论。

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。

The combined massaging and brushing tool of claim 1 wherein said convexes are of conical shape.

又名丝：在化学纤维制造过程中，纺丝液从纺嘴挤出，在纺丝箱中冷却或在凝固浴中凝固成形，成为连续不断的丝。

The research results show that:(1) Brass is a binary alloy of copper and zinc, because its casting temperature is high, the freezing temperature of brass and zinc is different, it is inevitable to produce educts that adhere to the graphite crystallizer's surface during the solidification.

黄铜扁锭水平连续铸造气体保护方法的研究结果表明：(1)因为黄铜是铜锌二元合金，由于其铸造温度高，黄铜与锌的凝固温度不同，在凝固过程中不可避免的要产生析出物附着在石墨结晶器表面。

The results show that the composite compound observed is mainly composed of TiC, CaS and CeS; the nucleation sequence of the phases during the solidification of the alloy is CeS→TiC→austenite; the (100) crystal plane of CeS and the (001) plane of TiC, and (100) plane of TiC and (001) plane of austenite match perfectly; CeS can act as the heterogeneous nucleating center of TiC, and TiC can act as the nucleating center of austenite.

结果表明：试样中的复合化合物主要由CaS，CeS和TiC组成；合金凝固时的形核顺序为CeS→TiC→奥氏体；CeS及CaS的(100)晶面与TiC的(001)晶面、TiC的(100)晶面与奥氏体的(001)晶面匹配良好；CeS凝固时可作为TiC的异质形核核心，而TiC又可作为奥氏体的形核核心。

The effects of some important factors on structure, pore size, porosity, flux, weight of vapor transfer, etc. have been investigated by changing temperature of PVDF resolution, types of solvent, molecular weight of PVDF, weight of additive, time of solvent pre-evaporation and so on. The optimal process of making membrane and recipe of solution were made out.

然后通过改变PVDF溶解温度，铸膜液的溶剂，PVDF的分子量，PVDF用量，添加剂氯化锂用量，涂膜时预挥发时间，凝固浴温度以及凝固浴中无机盐氯化钠、溶剂丙酮等影响因素，考察这些因素对膜形态结构及孔径，孔隙率，水通量，透湿量等性能的影响规律，初步确定了铸膜液配方及涂膜工艺条件。

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 experiments got the rules of temperature distribution and solidification structure under different cooling boundary of sand mold and metal mold.

实验测得了砂型和会属型冷却条件下，相同材质铸件凝固过程中的边界温度分布及各自对应的凝固组织。

The microsturcture characteristics of M2 cast-strip were studied with such experimental methods as metallographic analysis, SEM, XRD and TEM[0]. The effect of sub-rapid solidification on the size, type and distribution of eutectic carbides in M2 cast-strip was analyzed. The effect of heat treatment temperature and its holding time on the eutectic carbides in M2 cast-strip was explored. The eveolution of metastable phase of M2C eutectic carbide during the heat treatment period and the decomposition dynamics concerned were researched. The M2 cast-strips were rolled into thin strips and the effect of deformation ratio on carbides in M2 cast-strip was examined. Then these thin strips were comparied with those that were produced by conventional technology on carbide, hardness, red-hardness and bend strength. At last the rolled M2 cast-strips were made into saw blades and their cutting performance was experimented on in tools factories and then compared with that of similar products produced by conventional technology.

采用常规金相、扫描电镜、X射线衍射及透射电镜等实验研究了M2高速钢铸带的凝固组织特征，分析了亚快速凝固对铸带中的共晶碳化物的析出类型和尺寸以及分布的影响；探索了后续热处理温度和保温时间对铸带碳化物组织的影响规律，分析了铸带中的亚稳相M2C共晶碳化物在热处理过程中的分解情况以及分解动力学；将铸带热轧成薄带，研究了压下率对铸带碳化物组织的影响，并将热轧薄带与常规工艺生产的相同规格的M2高速钢薄带在碳化物组织、硬度与红硬性以及抗弯性能等方面进行了对比；将热轧薄带加工成机用锯条后在工具厂进行了锯切性能试验，并与常规工艺生产的同类产品进行了使用性能对比。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。