EXTRUDED ALUMINUM ALLOY PIPE BY PORT HOLE EXTRUSION FOR AUTOMOBILE, AND METHOD OF MANUFACTURING ALUMINUM ALLOY PIPE FOR AUTOMOBILE

摘要

PROBLEM TO BE SOLVED: To reduce a manufacturing cost, to improve piping workability and piping quality, and to sufficiently cope with thinning of a diameter and a wall thickness in piping and complification of a terminal shape, by manufacturing an automobile pipe using a port hole extrusion method to eliminate stretching work and various working accompanied thereto.;SOLUTION: This pipe is an Al alloy port hole extruded pipe for an automobile containing 0.20-0.6 wt.% of SiO2 (% hereinafter), 0.45-0.9% of MgO, and at least one kind selected out of 0.1% or less of Cu, 0.1% or less of MnO, 0.1% or less of CrO, 0.1% or less of ZrO and 0.1% or less of TiO, with the remainder of obligatory impurities and Al, with excellent forming workability such as bending workability, shaft seal bead workability and core pipe workability. By this method, drawing processing and other processings following it can be eliminated.;COPYRIGHT: (C)2001,JPO