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.
结果表明：随着终轧温度的降低，角钢的冲击韧度逐渐降低；
The results show that, with the decrease of finishing temperature, the low-temperature impact ductility decreases gradually.
从控制开轧温度，降低终轧温度方面，提高螺纹钢的机械性能。
From controlling the initial rolling temperature and declining the end rolling temperature, improving the mechanical reference of ribbed bars.
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