Magnesium alloy wide plate three-roll casting-rolling mill

Abstract

The invention discloses a magnesium alloy wide plate three-roll casting-rolling mill. The casting-rolling mill has the advantages of the two-roll casting-rolling mill and the four-roll casting-rolling mill, overcomes the defects thereof and is characterized by fast solidifying speed and cooling speed, high rolling pressure and good plate shape control. The three-roll casting-rolling mill can be used to cast and roll liquid magnesium alloy to casting-rolling strips with 800mm-1800mm of width, large deformation and good plate shape; and the main body of the casting-rolling mill is designed to be a reducing three-roll casting-rolling mill. By using the three-roll casting-rolling mill, the technological parameter indexes, such as stable liquid stream, uniform current distribution, stable temperature field, large unit rolling pressure and good plate shape, of the casting and rolling requirements of the magnesium alloy wide sheet are easy to realize.

Description

Technical field: [0001] The invention belongs to a magnesium alloy wide sheet casting and rolling mill, in particular to a three-roll casting and rolling mill equipment for casting and rolling a wide magnesium alloy thin slab. technical background: [0002] The density of magnesium alloy is about 1 / 4 of steel, 2 / 3 of aluminum, similar to plastic, with high specific strength and specific stiffness, good thermal conductivity, good damping and shock absorption, excellent machining performance, stable size of parts and easy Recycling and other advantages, with excellent value and broad application prospects, it is known as "the most promising green engineering material in the 21st century". Magnesium alloys are now widely used in industries such as automobiles, aviation, aerospace, metallurgy, chemicals, communications, electronics and sporting goods. Especially since the early 1990s, increasingly urgent energy and environmental issues have greatly stimulated the development of...

AI Technical Summary

Problems solved by technology

The casting and rolling mill of magnesium alloy wide sheet is very difficult, and the two-roll casting and rolling mill and the four-roll casting and rolling mill are not competent

The roll gap process of the casting rolls of the two-roll casting machine is very long, especially when the thickness of the cast rolling plate is very small, it is impossible to distribute the magnesium alloy liquid to the plane close to the roll gap position of the rolls

If the solidified layer is very thick in the rolling area, the required rolling rate requires a large rolling force, which is difficult to achieve structurally, otherwise thicker rolls will be required, which will further increase the length of the roll gap

Using, for example, the high-speed aluminum alloy four-roll casting machine in the UK can overcome the above problems, but the structure of the casting rolling machine is complex, the cooling strength of the casting and rolling required for solidification cannot meet the requirements, and the casting and rolling quality is also greatly restricted

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