Huntington Alloys Corporation

The International Nickel Company, Inc.

Thomas J Kelly

Mark L Robinson

Joseph L Nelson

An iron-based brazing alloy suitable for brazing iron-based alloys subject to high temperature environments. The resulting brazement contains little or no undesirable chromium boride (CrB) phase. Manganese, substituted for boron, depresses the melting point of the brazing alloy and vaporizes during the brazing cycle. This vaporization, by adjusting the relative proportions of the remaining elements, raises the remelt temperature of the brazement.

Brazing alloy

Surface treatment of stainless steel with pulsed beam from laser benefits resistance to corrosion in acid chloride media.

Corrosion of type 304 stainless steel by laser surface treatment

A weldable oxide dispersion strengthened alloy which provides improved welds and welded structures of oxide dispersion strengthened materials is characterized by good retention of dispersoid distribution in the fusion weld zone.

Weldable oxide dispersion strengthened alloys

Apparatus and method for laser welding in a controllably pure gaseous environment at sub-atmospheric as well as high pressures. A workpiece to be welded is contained within a vessel having a light transmitting means which allows passage of a laser beam into the vessel. A gas stream is introduced to the vessel through a gas inlet means and positioned so that the stream deflects ionized particles from impinging on the light transmitting means. The gas stream simultaneously serves to cool the light transmitting means. Weld debris and spent gas are exhausted through a gas exhaust means which preferably is located adjacent to the workpiece. The apparatus is particularly suited to the laser welding of oxide dispersion strengthened alloys.

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Suffern, NY, United States of America

Thomas J Kelly