Supercharging device in magnesium-based material continuous casting and extruding equipment

Abstract

The invention discloses a supercharging device in magnesium-based material continuous casting and extruding equipment. The supercharging device is arranged so that the effective friction force can beestablished in a magnesium-based material during the continuous casting and extruding process. The supercharging device structurally comprises a casting and extruding roller and a casting and extruding shoe seat which cooperate with each other, a casting and extruding groove is formed in the roller surface of the casting and extruding roller, a supercharging bearing bush cooperating with the casting and extruding groove is arranged on the corresponding side face of a casting and extruding shoe, the inner side surface of the surcharging bearing bush is arc-shaped and coats the roller surface ofthe casting and extruding roller, the arc radius R of the inner side surface is 0.8-1.2 mm larger than the arc radius r of the roller surface of the casting and extruding roller, furthermore, the contact area between the inner side surface of the supercharging bearing bush and the casting and extruding groove of the casting and extruding roller adopts a radial progressive structure, the unfoldinglength L of the contact area is the length of the arc corresponding to the radian angle alpha of the supercharging bearing bush, and the inner side surface of the supercharging bearing bush is divided into three areas (a platform area, a small-angle slope area and a large-angle slope area) from top to bottom. The supercharging device can be widely applied to various continuous casting and extruding equipment of magnesium or a magnesium alloy.

Description

technical field [0001] The invention belongs to the technical field of metal material processing, in particular to a booster device in continuous casting and extrusion equipment for magnesium-based materials. Background technique [0002] Magnesium and its alloys have a series of advantages such as low density, high specific strength and specific stiffness, good casting, shock absorption, cutting processing and electromagnetic shielding performance, as well as abundant resources and easy recycling. They are known as important green engineering materials in the 21st century . It has broad application prospects in aerospace, automobile, electronics and other industrial fields. [0003] According to different processing methods, magnesium alloys are mainly divided into two categories: casting and wrought magnesium alloys. However, the casting process of magnesium alloys has problems such as brittleness, coarse grains, easy composition segregation, and poor corrosion resistance...

AI Technical Summary

Problems solved by technology

[0005] However, compared with other non-ferrous metals, magnesium is easy to absorb gas in the melt state, and its liquid shrinkage, solidification shrinkage and solid shrinkage rate are larger. At the same time, the friction coefficient between magnesium and hot work die steel is small, so magnesium and magnesium alloys During the casting and extrusion process, the crystals are easy to detach from the surface of the casting extrusion roller after solidification, and cause slippage, so the friction force cannot be effectively established, making it difficult for the metal magnesium to produce extrusion plastic deformation

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