Rolling technological method for preparing wide thin plate billet through magnesium alloy cast-rolling plate

Abstract

The invention relates to a rolling technological method for preparing a wide thin plate billet through a magnesium alloy cast-rolling plate, and belongs to the technical field of magnesium alloy wide thin plate billet rolling. The rolling technological method for preparing the wide thin plate billet through the magnesium alloy cast-rolling plate is characterized by comprising the following steps that (1) the shape and the size of the wide thin plate rolling billet are determined, the cross section of the wide thin plate rolling billet comprises a middle thin area, thick areas are arranged on the two sides of the middle thin area, the thick areas and the middle thin area are connected through a transition area, and the billet thickness of the transition area is decreased continuously from the thick areas to the middle thin area; and (2) for rolling of the wide thin plate rolling billet, the shape and the size of the finally obtained magnesium alloy wide thin plate billet meet the requirements that the thickness of the middle thin area is 1.0 mm-3.0 mm, and the width of the billet is 1200 mm-2000 mm. According to the rolling technological method for preparing the wide thin plate billet through the magnesium alloy cast-rolling plate, excellent billets are provided for a magnesium alloy wide thin plate follow-up rolling technology, and the phenomenon of edge cracking after the rolling operation is avoided, so that the yield of the magnesium alloy wide thin plate rolling is increased.

Description

technical field [0001] The invention belongs to the technical field of directly rolling a magnesium alloy wide thin plate stock from a magnesium alloy cast rolled plate or a cast rolled coil, in particular to a rolling process method for preparing a wide width thin plate stock from a magnesium alloy cast rolled plate. Background technique [0002] Magnesium alloy is currently the lightest metal structural material in engineering applications, and has become an important material in industrial fields such as national defense, aerospace, automobiles, and electronic communications. With the start of large-scale engineering projects such as high-speed rail transit and electric vehicles in my country, higher requirements are put forward for large-scale magnesium alloy products. [0003] From the thickness point of view, the magnesium alloy wide sheet can be divided into thick plate and thin plate according to the conventional metal plate. The thickness is not less than 6.0mm is c...

AI Technical Summary

Problems solved by technology

The cast-rolling method is a low-cost magnesium alloy plate production process, but the product quality is not as good as the rolling method, and it is very difficult to realize the casting-rolling production of wide-width plates (the width is generally below 650mm); the extrusion blanking method is mainly used to produce thin plates , but the width of the plate is limited (generally below 600mm); the ingot hot rolling billet method is a traditional magnesium alloy plate production method, which can produce magnesium alloy wide sheets, but this method has low yield and high production cost

The specifications of magnesium alloy sheets used in the field of transportation are generally 1.5-3.0mm in thickness, >1600mm in width, and >4000mm in length, which are limited by the insufficient width of cast-rolled and extruded plates and the low yield and cost of casting and hot-rolled billets. For reasons such as too high, the current magnesium alloy plate has not yet been applied on a large scale in this field

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