High pressure fuel injection tubing material

Details High pressure fuel injection tubing material High pressure fuel injection tubing material

1979-07-16

1981-04-14

Rutledge, L. DeWayne

Metal treatment

Compositions

Heat treating

138177, 148 155, 148 165, C22C 3844, C22C 3846

Patent

active

042617693

ABSTRACT:
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.

REFERENCES:
patent: 2204209 (1940-06-01), Davenport
patent: 2541116 (1951-02-01), Somes
patent: 2804413 (1957-08-01), Essig et al.
patent: 3661656 (1972-05-01), Jarleborg
patent: 3891474 (1975-06-01), Grange
patent: 3992231 (1976-11-01), Timmons
patent: 4004952 (1976-01-01), Jatczak et al.
patent: 4191599 (1980-03-01), Stickels et al.
Fuel Injection Tubing-SAE J529b (Standard), Report of Engine . . . Committee, 1969, pp. 21.123-21.124.
Testing Techniques for Diesel Fuel Injection . . . SAE-J969b, Report of Engine Committee, 1975, p. 24.91.
Physical Metallurgy Principle, Ed. Reed-Hill, Nostrand, N.Y., 1964, pp. 500-502.

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