Mechanical processing of high aspect ratio metallic tubing and related technology

摘要

Tubes for use in ultrahigh pressure devices, and associated systems and methods of manufacture are disclosed herein. In one embodiment, a metal tube includes an elongate bore having a circular transverse cross-sectional shape. The metal tube also includes an elongate wall extending around the bore and having an annular transverse cross-sectional shape with an inner surface closest to the bore, an outer surface furthest from the bore, and a wall thickness extending from the inner surface to the outer surface. An inner portion of the wall is under swage-autofrettage-induced overall compressive stress.

主权项

1. An elongate metal tube for delivery of ultrahigh pressure water in a waterjet cutting system, the tube comprising:
an inner surface defining a bore having a diameter, wherein a ratio of a length of the tube to the diameter of the bore is greater than 90; an inner wall portion at the inner surface, wherein, throughout the length of the tube, the inner wall portion is under residual overall compressive stress including tangential, radial and longitudinal components; first metal microstructures within the inner wall portion, wherein, throughout the length of the tube, the first metal microstructures are dislocated in the same longitudinal directions; an outer surface; an outer wall portion at the outer surface; and second metal microstructures within the outer wall portion, wherein, throughout the length of the tube, the second metal microstructures are not dislocated in a longitudinal direction.