The invention relates to a rare-earth
magnesium alloy seamless
thin wall tubule hot-
extrusion method and its specialized mold. The method includes:
machine-tooling after
casting ingot homogenization treatment into a hollow blank, performing pre-
extrusion in the mold,
extrusion molding after die change, and performing
solid dissolving aging treatment for further improving the tube dynamics performance. The invention relates to a special mold, including an upper and a lower die holders, a
thermal insulation sleeve, a squeezing
barrel, a male die and a concave die, wherein, the concave die is composed of a pre-extrusion concave die and a shaping concave die, one of the pre-extrusion concave die and the shaping concave die is selected and interchangeable with the other, and is fixed on the lower die holder through a squeezing
barrel. The invention can extrude a rare-earth
magnesium alloy seamless
thin wall tubule with the external
diameter of 5-10mm and internal
diameter of 4-8mm, which has features of high material utilization, small extruding force, high products
dimensional precision, good surface accuracy, good dynamics performance and the like features. The inventive mold simultaneously has advantages of simple structure, easy operation, low cost, long life and so on.