Rolling procedures for eliminating alligator defect formation

Details Rolling procedures for eliminating alligator defect formation Rolling procedures for eliminating alligator defect formation

1984-07-19

1986-04-29

Husar, Francis S.

Metal deforming

By use of roller or roller-like tool-element

Plural roller-couples

72229, 72366, B21B 106

Patent

active

045848629

ABSTRACT:
A method for reducing the thickness of a slab of metal under conditions which tend to cause alligator defects to occur. The method comprises the steps of directing a relatively thick slab of metal several times through a rolling mill or mills to incrementally reduce the thickness of the slab until the thickness approaches a value that tends to produce a longitudinal and lateral fracture in one or both ends of the slab. The thickness of the slab is further reduced by passing the same several times again through a rolling mill or mills, with each of the passes of the slab taking a decreasing amount of reduction in thickness until a predetermined thickness value is reached. The next step involves passing the slab again through a rolling mill to further reduce the thickness thereof, the amount of reduction in this step and pass being substantially greater than that of the last pass immediately preceding this step.

REFERENCES:
patent: 4480458 (1984-11-01), Bogovich

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