Method for preparing wide magnesium alloy sheet
A magnesium alloy and plate technology, applied in metal rolling, metal rolling, metal processing equipment, etc., can solve the problems of high cost of magnesium alloy wide plates, limit the application of magnesium alloy plates, and poor plastic deformation ability, etc., to achieve Ease of transplantation and handling, cost reduction of panels, and effects of reduced surface cracks
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Embodiment 1
[0021] According to the GB / T5153-2003 standard, calculate the weight of Mg, Al, Zn and Mn required for smelting 1000Kg AZ31B magnesium alloy; put the weighed material into a 150°C drying oven for preheating, and then put the preheated Mg is melted in a crucible heated to 700°C. When the magnesium is completely melted, the temperature is raised to 720°C. Add Al and Zn and stir while adding. After all the added metal elements are melted, raise the temperature to 740°C and add Mn (as MnCl 2 The form of adding), is also stirring while adding; when the melt temperature is 740 ° C, refining, degassing and slag removal are carried out; then the melt temperature is controlled at 710 ° C for heat preservation and standing, and after standing for 60 minutes, low-frequency Oily electromagnetic casting, electromagnetic casting frequency 20Hz, magnetic field strength 22mT, casting speed 37mm / min, cooling water 350L / min, crystallizer cross-section 350mm×850mm; then the ingot is subjected to...
Embodiment 2
[0023] The AZ31B magnesium alloy plate with a thickness of 14 mm and a width of 760 mm rolled out in Example 1 is used to carry out sheet rolling, and after the hot-rolled sheet is cut and trimmed before the sheet rolling, the surface is polished and processed; The hot-rolled sheet is finished-rolled after heating and annealing. The finishing-rolling temperature is 400°C, the roll temperature is 150°C, and the rolling speed is 200m / min. First, the processed hot-rolled plate is rolled in the first and second passes. The rolling process is: the deformation of each pass is 14mm→7mm→3.5mm. After the first finish rolling, the plate is stored in the front and rear of the finish rolling mill with a In the coiling device of the hot coil box, the temperature inside the hot coil box is 380°C; then the 3rd and 4th passes of rolling are carried out, the rolling process is 3.5mm→2.5mm→2mm, before the 3rd and 4th passes of rolling A 21-roller leveler is used for repeated bending deformation...
Embodiment 3
[0025] The AZ31B ingot homogenized in Example 1 with a thickness of 300 mm x a width of 800 mm x a length of 1500 mm was used for rolling along the width direction. Firstly, heat the prepared billet at 450°C and keep it warm for 5 hours; then hot-roll the prepared billet widthwise on a reversible plate hot rolling mill for one pass. The rolling process is as follows: The deformation is 300mm→255mm, and the rolling speed is 40m / min; then the 2nd, 3rd, 4th, 5th pass of reversible hot rolling is carried out. The rolling process is: the pass deformation is 255mm→204mm→166mm→132mm→100mm, The rolling speed is 60m / min, the vertical roll rolling with a deformation of 6% is carried out before the second pass, and the vertical roll rolling with a deformation of 5% is carried out before the fourth pass, and then the different speed ratio is 1:1.30 asynchronous hot rolling, in the 5th pass, rolling to 5% pre-stretching deformation; then put the plate into a 450℃ furnace for 40min high-tempe...
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