A composite die for gradient extrusion of semi-solid magnesium alloy

Abstract

The invention provides a semi-solid magnesium alloy gradient extrusion combination die, the left side of the supporting plate is connected and fixed with the frame of the casting and rolling mill through bolts, the right side is connected with a shunt chamber through interference fit, and the right side of the shunt chamber is connected with the punch through a clearance fit , the right side of the punch is connected to the die through clearance fit, the right side of the die is connected to the support by bolts, and the right side of the support is connected to the base; a control room is set between the support and the support plate, and the control room is wrapped in a ring shape in the shunt chamber, die and punch outside; the left end of the mandrel is fixed on the punch, and its axis coincides with the axis of the die; that is, the solution flows through the shunt bridge into the shunt hole, then enters the welding chamber, and finally passes through the core hole Outflow, post-advance spiral coolant is distributed around the punch and die, so as to control the solid phase ratio of the solution. The invention effectively improves texture distribution, weakens anisotropy, improves the plastic forming ability of products, and saves energy; it has the advantages and positive effects of high production capacity, good quality, strong flexibility and stable production.

Description

technical field [0001] The invention relates to the technical field of magnesium alloy processing, in particular to a semi-solid magnesium alloy gradient extrusion combined die. Background technique [0002] Magnesium alloy has many advantages such as light weight, high specific strength, good heat dissipation and shock absorption, good precision formability, and recyclability. It is an ideal choice for aerospace, rail transit, automobile, portable military and civilian products metal structure materials. However, magnesium and magnesium alloys have poor plasticity, easy cracking, fast heat dissipation, low ductility, and poor plastic processing ability, which hinder the further development and application of magnesium alloys. As an important process for the production of magnesium alloy profiles, extrusion processing is widely used in the production of magnesium alloys due to its compactness and strong performance. [0003] At present, most of the magnesium alloy profiles ...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is a semi-solid magnesium alloy gradient extrusion combination die, which can effectively solve the problem of poor bearing capacity, prominent anisotropy, limited specifications, and long conventional rolling production process in existing extrusion production of magnesium alloy welded pipes. , Poor flexibility, low production capacity, high production cost and other technical problems

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