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轧辊产生弹性压扁时可能轧制的板厚。在一定轧机上轧制一定的产品时，随着板带的逐渐变薄，压下越来越困难。当板带薄至某一限度后，不管如何旋紧压下螺丝或加大液压压下的压力，不管反复轧制多少道，由于轧辊产生弹性压扁而不可能再使产品变薄。这一极限厚度称为可轧厚度。直径超过400mm的冷轧轧辊，在锻造后，多半在中心馒一个670一250mm的通7L。

The ***allest plate thickness may be rolled when the roll produces elastic squash. When a certain product is rolled on a certain rolling mill, with the gradual thinning of the strip, it is becoming more and more difficult to press down. When the strip is thin to a certain limit, no matter how to tighten down the screw or increase the pressure of hydraulic pressure, no matter how many rolls are repeatedly rolled, it is for the product to become thin due to the elastic flattening of the roll. This limit thickness is called the minimum rolling thickness.

19世纪下半叶欧洲炼钢技术的进步要求轧制更大吨位的钢锭，无论是灰铸铁或冷硬铸铁轧辊的强度均已不能满足要求。含碳量为0.4%～0.6%普通铸钢轧辊相应诞生。重型锻压设备的出现更使这种成分的锻造轧辊的强韧性得到进一步提高。

In the second half of the nineteenth Century, the progress of steelmaking technology in Europe requires larger tonnage steel ingots to be rolled. Neither the strength of gray iron or chilled cast iron rolls can meet the requirements. The ordinary cast steel roll with a carbon content of 0.4% to 0.6% is born accordingly. The emergence of he***y forging equipment makes the strength and toughness of the forging roll of this component further improved.

既避免机械加工，又无补焊热应力热影响，修正厚度也不受***，一起产品所具有的耐磨性及金属材料不具备的退让性，确保修正部位的接触协作。

Not only to ***oid mechanical processing, but also to weld hot stress and heat, the correction thickness is not bound, and the wear resistance of a product and the non - concession of metal materials are not ***ailable, so as to ensure a hundred percent contact and cooperation of the corrected parts.

轧辊在制作和运用前的预备工序中会发生剩余应力和热应力。运用时又进一步遭到了各种周期应力的效果,包含有曲折、改变、剪力、接触应力和热应力等。

Residual stresses and thermal stresses will occur in the preparatory process before making and applying rolls. When applied, it is further affected by various cyclic stresses, including twists, changes, shear forces, contact stresses and thermal stresses.