High-efficiency rolling technology for high-strength and high-ductility magnesium alloy sheet and preparation method

Abstract

The invention discloses a high-efficiency rolling technology for a high-strength and high-ductility magnesium alloy sheet. The high-efficiency rolling technology is a technology used for rolling a rolled blank. According to the parameter control of the rolling technology, the rolling speed of each rolling pass is 10-50m / min, the rolling reduction of each rolling pass is controlled to be 40%-90%, and the preheating temperature and rolling temperature in each rolling pass before rolling are both 250-450 DEG C. The invention further discloses a preparation method of the high-strength and high-ductility magnesium alloy sheet. The method includes the steps that (1) the rolled blank is prepared; (2) high-efficiency hot rolling is carried out, the rolling speed of each rolling pass is controlled to be 10-50m / min, the rolling reduction of each rolling pass is 40%-90%, and the preheating temperature and rolling temperature in each rolling pass before rolling are both 250-450 DEG C; and (3) annealing is performed. By the adoption of the high-efficiency rolling technology for the high-strength and high-ductility magnesium alloy sheet, the mechanical property level of the sheet can be effectively improved, and the strength and ductility of the sheet can be greatly improved particularly.

Description

technical field [0001] The invention relates to a nonferrous metal processing technology, in particular to a rolling technology for magnesium alloy plates. Background technique [0002] Magnesium is the lightest metal structural material discovered so far. For this reason, magnesium alloy, as an emerging metal structural material, has abundant resources in the world. The density of magnesium is only 1.74g / cm 3 , which is only 2 / 3 of the density of aluminum and 1 / 4 of the density of steel. This feature makes magnesium alloys have very broad application prospects in the fields of automobiles, aerospace, national defense, electronic communications, and home appliances. As an important means of plastic deformation processing of metal materials, rolling has been greatly developed. However, the application of existing magnesium alloy sheets is still greatly limited, and its production and usage are far below that of steel and other non-ferrous metals (such as aluminum and coppe...

AI Technical Summary

Problems solved by technology

However, the rolling speed in the processing method disclosed in this Chinese patent document is too fast, and there are certain potential safety hazards

At the same time, the process steps of this processing method are relatively complicated, and it is difficult to be widely used in actual production.

[0006] In summary, the existing methods for preparing magnesium alloy sheets cannot effectively take into account many aspects such as improving production efficiency, reducing production costs and improving mechanical properties.

At the same time, because the existing methods for preparing magnesium alloy sheets either have a high rolling speed or a low rolling speed, and the process is complicated, it does not have the feasibility of large-scale industrial production.

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