变质剂

The invention possesses rapid melting speed with stable deteriorating effect without phosphor, which is new typed industrial crystal aluminum-silicon alloy alterant.

该中间合金在使用过程中无污染，不含磷，熔化速度快，变质效果稳定、长效，制备工艺简单，成本低，是一种新型的工业近共晶铝硅合金变质剂。

The technical characteristics of different alterative, their alterative effects, total costs and their development are compared and proposed.

在分析存在问题的基础上，认为发展和研究一种绿色、长效、高品质变质剂及相关的变质处理工艺，是必要的。

With the increasing of the adding amount of alterative, the modification effects become better firstly, and then become worse.

随着变质剂加入量的增加，变质效果先显著提高，后有所降低。

It is proved that the method of selection modificators by chemical bond parameter is suitable to the study of Cr cast iron.

证明了用键参数函数选择变质剂的方法也适用于中铬铸铁的研究。

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。

The SiCaBa alloy is deoxidizer and desulphurizer of steel making and play the part of BaP2 or BaP3. It is also the breeder and deterioration of casting.

产品中文说明硅钙钡合金是炼钢的脱氧剂、脱硫剂，还兼有脱磷（BaP2、BaP3）的作用，是铸造的孕育剂和变质剂。

In the experience Salt、Sb and thulium can change primary Si and eutectic Si through changing the morphology, but the effect of modification is very defferent.

其中钠盐的变质效果强，锑次之，稀土变质效果最差；变质剂对Si相的变质主要是通过孪晶凹角沟槽机制进行的。

The current theory and application of Al-Si alloy mainly focus on the study of hypoeutectic and eutectic, therefore we systematically analyzed the modification process of hypereutectic Al-Si alloy based on the methods and results of predecessors. Several factors including the modification temperature, the content of modifier, the available holding time, the times of repeat melting , the casting temperature and the speed for cooling have been studied in order to understand its effects to the composition, function and performances of primary silicon and eutectic silicon.

中文摘要本文针对目前Al-Si合金相关应用和理论的研究多集中于亚共晶和共晶合金的情况，在前人的研究成果和研究方法的基础上，对过共晶Al-Si合金变质处理进行了较为系统的分析，研究了变质剂的成分配比、变质温度、变质剂的加入量、变质后的静置时间、浇注温度及冷却速度等因素对过共晶铝硅合金中初晶硅和共晶硅的大小、形状、数量和分布的影响。

The current theory and application of Al-Si alloy mainly focus on the study of hypoeutectic and eutectic, therefore we systematically analyzed the modification process of hypereutectic Al-Si alloy based on the methods and results of predecessors. Several factors including the modification temperature, the content of modifier, the available holding time, the times of repeat melting , the casting temperature and the speed for cooling have been studied in order to understand its effects to the composition, function and performances of primary silicon and eutectic silicon.

本文针对目前Al-Si合金相关应用和理论的研究多集中于亚共晶和共晶合金的情况，在前人的研究成果和研究方法的基础上，对过共晶Al-Si合金变质处理进行了较为系统的分析，研究了变质剂的成分配比、变质温度、变质剂的加入量、变质后的静置时间、浇注温度及冷却速度等因素对过共晶铝硅合金中初晶硅和共晶硅的大小、形状、数量和分布的影响。

The microstructure observation and theoretical calculation show that the primary Si nucleates on the SiC_w surface.

利用纯铝和单晶硅配制Al-18Si合金，采用Al-10Sr合金作为变质剂进行变质处理。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。