A production process of magnesium alloy ultra-thin strip warm rolling-ultra-low temperature cold rolling

Abstract

The invention provides a magnesium alloy ultra-thin strip warm rolling-ultra-low temperature cold rolling continuous rolling production method. The initial magnesium alloy strip is heat-preserved at 300-400°C for homogenization treatment, and then multi-passed at 300-400°C Reversible isothermal rolling to obtain an intermediate rolling plate with a thickness of 1~2mm; the intermediate rolling plate obtained by hot rolling is sent to the coiling device on one side of the rolling mill through a liquid nitrogen controlled cooling device; then the magnesium alloy sheet is subjected to reversible low-temperature cold rolling , After the cold rolling is completed, the plate enters the cooler on the exit side of the rolling mill to cool, and is crimped and kept warm by the coiling machine, and finally the magnesium alloy fine-grained ultra-thin strip is obtained. In the present invention, the cooler and the coiling machine are arranged symmetrically on both sides of the rolling mill. By changing the steering direction of the rolling mill and the coiling machine, the subsequent multi-pass ultra-low temperature cold rolling of the magnesium alloy plate can be realized, and the grain refinement of the cooled magnesium alloy plate can be controlled by liquid nitrogen. Obviously, the fine and uniform grains can effectively improve the comprehensive mechanical properties of the magnesium alloy sheet and improve its subsequent processing performance.

Description

technical field [0001] The invention relates to the field of metal material processing, in particular to a magnesium alloy ultra-thin strip warm rolling-ultra-low temperature cold rolling production process. Background technique [0002] Magnesium alloys have broad application prospects in aerospace, 3C products, military and medical fields due to a series of unique advantages. This requires magnesium alloy products to have good mechanical properties. Rolling deformation is the main deformation mode of magnesium alloys. During the rolling production process of magnesium alloy plates and strips, the deformation temperature has a great influence on the properties and structure uniformity of the plates, and the controlled cooling after rolling also directly affects the quality of the finished products. [0003] Due to the poor formability of magnesium alloys at room temperature, magnesium alloy sheets are usually rolled by a hot rolling process to transform the as-cast or cast...

AI Technical Summary

Problems solved by technology

However, the air cooling after rolling inhibits the improvement of the performance of the magnesium alloy sheet, and the difference in the cooling rate between the edge and the center of the sheet will cause uneven structure of the sheet, which will affect the quality of the sheet.

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