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1·Low temperature toughness is remarkably improved by grain refinement.

晶粒细化显著提高了钢的低温冲击韧性。

2·It is shown that equal channel angular extrusion is a new method of grain refinement.

实验证明：等通道转角挤压技术是细化晶粒的新方法。

3·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。

4·The most effective approach for grain refinement is to lower the finish rolling temperature.

降低终轧变形温度对组织细化是最有效的。

5·The results show that the instrument can reach the demand of ultrasonic peening grain refinement.

试验结果表明该设备可以满足超声表面晶粒细化冲击的要求。

6·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。

7·The mechanism of the self grain refinement of metals has been studied onthe heredity theory of metals.

根据金属遗传原理探讨了晶粒自身细化机理。

8·One of the main reasons of grain refinement is that radiation increases for hot steel with magnetic field.

强磁场作用于相变时引起的高温钢辐射散热系数的增加是导致晶粒细化的主要原因之一。

9·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。

10·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。