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What are the rolling modes of magnesium alloy plate?

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Update time : 2023-03-14 17:57:42

Magnesium alloy plate rolling can be divided into conventional rolling and special rolling. Conventional rolling is divided into: traditional rolling, hot extrusion rolling and double roll continuous casting rolling; Special rolling is: asynchronous rolling, cross rolling, large strain rolling, electric pulse rolling and so on.

I. Conventional rolling (NR)

1.1 Traditional Rolling

Traditionally, magnesium alloy ingots are prepared by hot and warm rolling on the mill, sometimes cold rolling at the end.

The traditional rolling method can refine the microstructure of magnesium alloy and improve the mechanical properties to a certain extent, but it also has some shortcomings. Because of the multi-pass small deformation rolling process measures, need intermediate annealing and heating roll, low efficiency and waste resources, resulting in high cost of magnesium alloy sheet rolling production.

1.2 Hot extrusion rolling

Generally speaking, the hot extrusion rolling method is a rolling process method of rolling the plate into the required shape by hot extrusion.

Because the extrusion process is carried out in the extrusion cylinder, the heat dissipation of the sheet is slow, the plasticity of the sheet is maximized, and the crack of magnesium alloy can be suppressed to a certain extent. Therefore, this method is suitable for most of the production of magnesium alloy sheet. However, this method still has some shortcomings, such as the size of the rolled sheet should not be too large, the material rolling process waste is large, and the finished product rate is low. Large investment in equipment and instruments.

1.3 Continuous casting and rolling with two rolls

The two roll continuous casting and rolling technology (TRC) is used to prepare magnesium alloy slab respectively. Two inversion rotating rollers are used as crystallizer. After melting magnesium alloy and battering, the melt is evenly sent between the casting rollers through the distribution system (casting nozzle). The casting rollers integrate the casting and plastic processing (magnesium alloy solution can undergo plastic deformation while cooling quickly), and the required magnesium alloy slab is prepared with high efficiency.

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