含硫过多的铁和钢都是热脆性的。

Iron and steel with too much sulfur are red-short.

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因此，辊子表面有极高的硬度、脆性及热不稳定性。

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

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结果表明，钢丝热浸镀时走速过快和镀层不均匀是导致扭转脆性断裂的主要原因。

And quick wire movement during hot-dipping and inhomogeneous coating was identified as the main cause.

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结果表明，钢丝热浸镀时走速过快和镀层不均匀是导致扭转脆性断裂的主要原因。

And quick wire movement during hot-dipping and inhomogeneous coating was identified as the main cause.

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