The result shows that high cooling speed is the main reason of reforming the crack. Meanwhile, the countermeasures were put forward and good effect was obtained.

结果表明，裂纹的产生是由于车轮辐板在热成型中受到强烈的冷却影响所致，从而采取了相应的改进措施，取得了较好效果。

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The result shows that high cooling speed is the main reason of reforming the crack. Meanwhile, the countermeasures were put forward and good effect was obtained.

结果表明，裂纹的产生是由于车轮辐板在热成型中受到强烈的冷却影响所致，从而采取了相应的改进措施，取得了较好效果。

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