Method of producing a high pressure fuel injection pipe

Details Method of producing a high pressure fuel injection pipe Method of producing a high pressure fuel injection pipe

C - Chemistry, Metallurgy

21

D

26/155

C21D 9/14 (2006.01)

Patent

CA 1059738

ABSTRACT OF THE DISCLOSURE: A steel blank pipe is first subjected to the step of cutting off the hair crack layer portion including the black skin layer of the inner peripheral wall surface of the blank pipe. Thereafter, the steel blank pipe is repetitively subjected to the process of pipe drawing and the process of annealing within a non-oxidizing-hearth.

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