C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
26/155, 189/71
C22C 38/44 (2006.01) C21D 9/14 (2006.01) C23C 8/00 (2006.01) C23C 8/80 (2006.01) F02M 55/02 (2006.01) F16L 9/02 (2006.01)
Patent
CA 1128434
Title of the Invention: HIGH PRESSURE FUEL INJECTION TUBING MATERIAL AND METHOD OF MANUFACTURING THE SAME Abstract of the Disclosure: A high pressure fuel injection tubing material and a method of manufacturing the same wherein the inside surface of a fine diameter thick wall metal tube made of a single steel material is cemented, then the entire metal tube is heated and then immediately the outside surface is quenched or the inside surface is quickly heated and is then left to naturally cool so that the carbon content may gradually increase with the hardness distribution toward the inside surface from the outside surface of the wall thickness and a residual stress producing part in the peripheral direction may be formed. The above mentioned injection tubing material is high in the pressure resistance and can be well guaranteed against cracking and breaking by vibrations or the like.
332102
Kirby Eades Gale Baker
Usui Kokusai Sangyo Kabushiki Kaisha
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