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。
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。
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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