One of the greatest contributors to non-uniform hardness, increased thermal stresses, cracking and distortion is non-uniform fluid flow throughout the quench zone in production quench tanks.
造成淬火后工件硬度不均匀、热应力增加、畸变和开裂，主要是因为淬火槽内整个淬火区的液流不均匀。
The principal problems with respect to roll working life are cracking at the surface of roll for hot-rolling and that effective zone of quench-hardening of roll for cold-rolling is too narrow.
热轧工作辊的裂纹损坏和冷轧工作辊有效淬硬层过浅是两大突出问题。
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