Praxair Technology, Inc.

Edison Viotto

Jaak S Van Den Sype

Alan Russell Barlow

This invention is directed to a process and apparatus for producing high productivity carburizing. A process is introduced that uses a gas mixture made up of CO, H, CO, HO, CHand N, such that the product of the % CO and % His greater than about 1600; the ratio of CO/COis greater than 10; and the ratio of H/HO is greater than about 10. The gas mixture is controlled for a short time. A reactor for generating a gas mixture for carburizing steel is also introduced. This reactor is composed of a cylindrically symmetric body; a first central tube containing electrical heating elements for gas flow; a second central tube concentrically disposed around the first central tube; and a plurality of catalyst beds disposed in an annular space in a segmented fashion around the second central tube.

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São Paulo, Brazil

Edison Viotto