Fmc Corporation

Manuel N Maligas

John C Vicic

Gregory L Glidden

Jack Havens

Christi Hambrick

Sue F Haeberle

Thomas McNeilly

Brian Swagerty

The strength and wear resistance of a steel component is improved by adhering to it a material of higher strength compatible metal alloy, such as Inconel (RTM) 725 or like precipitation or age hardenable alloy. The higher strength alloy may be adhered by welding, plasma spraying, dip coating or electroplating. The component may be subjected to post-deposition heat treatment which preferably simultaneously softens a heat affected zone in the component and hardens the higher strength material.

Strength and wear resistance of mechanical components

A gate valve for use in a high pressure line has a movable gate and a static seat within a valve body. The seat has a seat face which is in sliding contact with a gate face. The seat and gate faces are coated with an amorphic coating which hardens when the seat face and gate face are subjected to manufacturing processes or rubbed together during valve opening and closing. A leak resistant seal between the seat and gate faces results when the valve is closed and subjected to high line pressure.

Hardface coating for seal surfaces in a gate valve

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Houston, TX, United States of America

Manuel N Maligas