Therefore, the roll surface is extremely hard and brittle and it is thermally unstable.

因此，辊子表面有极高的硬度、脆性及热不稳定性。

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High temperature of roll surface cause burning phenomenon and lower the hardness of roll surface.

辊面高温会产生烧附现象，使辊面的硬度降低。

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Therefore, the roll surface is extremely hard and brittle and it is thermally unstable. In addition, it is highly crack sensitive because of the high hardness.

因此，辊子表面有极高的硬度、脆性及热不稳定性。另外，由于高的硬度使之具有高的裂纹敏感性。

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Therefore, the roll surface is extremely hard and brittle and it is thermally unstable. In addition, it is highly crack sensitive because of the high hardness.

因此，辊子表面有极高的硬度、脆性及热不稳定性。另外，由于高的硬度使之具有高的裂纹敏感性。

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