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。
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。
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。
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