A kind of new grain refinement method by grain - refining aluminium ingots was related at last.

最后阐述了细晶铝锭熔铸铝锰合金的新型细化方法.

Grain refinement turn out in the alloy and a few minor precipitates also appear after annealing.

用金相显微镜、扫描电镜观察合金铸态以及退火态的组织，有明显的晶粒细化现象以及细小的析出物出现。

And the precipitation of Nb has the effect of precipitation hardening and grain refinement.

钢中铌的沉淀析出具有沉淀强化和晶粒细化的作用。

The grain refinement rate of the ingots increases with the increase of ultrasonic application time.

随着超声处理时间的增加，铸锭的细化率急剧增加。

The main factors that affect the grain refinement are heating and cooling rate, holding time and cycle index.

影响细化效果的主要因素有： 加热速度、保温时间、冷却速度和循环次数。

The grain refinement strengthening not only enhances strengthening of steel, but improves toughness and plastic.

而其中的细晶强化不但可以提高钢的强度, 而且还可以提高其塑性和韧性.

The chemical composition, grain refinement methods, application situation and progress in wrought Al- Mn alloy were summarized.

综述了变形铝锰合金的化学成分、细化方法、应用现状及发展动态。

The chemical composition, grain refinement methods, application situation and progress in wrought Al - Mn alloy were summarized.

综述了变形铝锰合金的化学成分 、 细化方法 、 应用现状及发展动态.

The grain refinement effect of titanium added by electrolysis is better than that of Al-Ti master alloy when the titanium content is similar.

钛含量相同时，电解低钛铝合金的细化效果优于铝-钛中间合金的细化效果。

It was also found out that proper Re element addition could increase the toughness of the weld metal and improve its microstructure by grain refinement.

适量的稀土元素可改善焊缝金属组织的形态、细化晶粒、提高韧性。