Joint and process for forming same

Details Joint and process for forming same Joint and process for forming same

F - Mech Eng,Light,Heat,Weapons

16

L

285/43, 26/91

F16L 41/00 (2006.01) B21D 39/06 (2006.01) B22F 7/06 (2006.01) F16L 23/028 (2006.01)

Patent

CA 1040681

Abstract of the Disclosure The invention is concerned with an improved joint between tubing and a flange having a hole therethrough into which the tubing is force-fit. The flange is made of powdered metal by placing the powdered metal and a lubricant in a mold, compressing the powdered metal at a pressure of at least about 4 x 107 Kg. per sq. meter, removing the resulting flange from the mold, initially heating it in an inert or reducing gas atmosphere to remove the lubricant, heating it further at a higher temperature to cause intermetallic bonding thereof, cooling it to a temperature below about 100°C. and dry machining annular channels into the hole in the resulting flange. The joint is formed by placing the tubing within the hole and expanding the tubing outwardly into the channels which extend from the hole. The resulting joint has a much higher resistance to torque than does a similar joint made between tubing and a machined flange of similar or even greater hardness. The invention is further concerned with a process for forming said joint.

240115

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