Allegheny Ludlum Industries, Inc.

Allegheny Ludlum Corporation

Richard Kazeva

Yeong-U Kim

Lawrence R Barkowski

An apparatus and method for quantitatively evaluating the finish of a curved surface of a rolling mill roll or a coil of strip. A light beam is directed by the position of a support housing at a specific incident angle onto the curved surface and a plurality of light detectors are positioned by the support housing above the curved surface for measuring the intensity of reflected light in various directions as defined by the positions of the light detectors. The housing is positioned by stabilizing arms at opposite sides of the housing so that the housing and stabilizing arms form three points of contact with the curved surface. A roller with journals at opposite ends is supported by each stabilizing arm. The longitudinal axes of the rollers are parallel to the longitudinal axis of the roll or coil of strip so that the light beam travels in a plane which is also parallel to longitudinal axis of the roll or coil of strip. An electrical circuit is coupled to the light detectors for calculating the value of specular reflectance as well as reflected light at various angles thereto.

Adjustably positioned apparatus maintaining a fixed perpendicular

A ferritic stainless steel consisting essentially of, by weight, from 12-14% chromium, from 0.2-1.0% columbium, not more than 0.75% total of carbon, nitrogen, silicon, manganese, molybdenum, nickel, and copper; balance, essentially iron.

Ferritic stainless steel having high anisotropy

There is disclosed a method for preparing nominally 13% chromium-0.3% columbium ferritic stainless steel by producing the steel to have very low content of residuals, carbon and nitrogen, hot rolling the steel, annealing the hot rolled steel, and cold rolling the annealed material to reduce the thickness at least 65 percent.

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New Kensington, PA, United States of America

Richard Kazeva