MAGNESIUM BASE ALLOY TUBE AND ITS MANUFACTURING METHOD

摘要

[Problem] To present a small-diameter magnesium base alloy tube and its manufacturing method of long length, high dimensional precision, and excellent mechanical properties.;[Solving Means] A raw material 1 of aluminum base alloy is extruded and formed by using a forming pattern comprising an upper pattern 2 having plural through-holes 21 for supplying the raw material into diaphragms of equal angles on the circumference and circular cylindrical protrusions 22 positioned in the center of plural through-holes 21 so as to be surrounded by plural through-holes 21 at the exit side of the through-holes 21, and a lower pattern 3 positioned in the concave portions commonly penetrating at the exit of the plural through-holes 21 of the upper pattern 2, having through-holes 32 for inserting the protrusions of circular circumference of the upper pattern by providing a tube forming gap, positioned in the center of concave portions 31 of the concave portions 31 in the circular columnar shape of the upper pattern 2.

主权项

1. A magnesium base alloy tube, being a magnesium base alloy tube of which outside diameter is 1.0 to 6.0 mm, inside diameter is 0.8 to 5.5 mm, overall length is 500 mm or more, coaxiality is 20 μm or less, and elongation is 10% or more.