MANUFACTURE OF IRON BASE DISPERSION STRENGTHENING ALLOY TUBE

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing an iron base dispersion strengthening alloy tube without surface defects with high productivity. SOLUTION: In the method for manufacturing a tube by forming a tube stock of the iron base dispersion strengthening alloy into a bar 2-1 for tubular with upper and lower grooved rolls 5, 5-1 while advancing it in the longitudinal direction and, at least in the entire area of a rolling region, the length that the rolling surfaces 6, 6-1 of grooves are in contact with the outer peripheral part of a rolled stock is defined as >=0.9 times the outer peripheral length of the rolled stock. It is preferable to execute this method with a Pilger mill.