浇注温度提高，枝晶臂的长大速度增大，上述物理冶金作用能够部分细化球化奥氏体，但其圆整度较差，尺寸较大。

With the increasing of casting temperature, the dendrites grew fast, which could spheroidize and fine partial austenite with worse circularity and bigger size.

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与现有技术相比，本发明可以生产高强度的长枝化聚烯烃，偶联度可控，成本低廉，生产率高。

Compared with the prior art, the method can produce high-strength long-shoot polyolefin, and has the advantages of controllable coupling degree, low cost and high productivity.

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