Casting-rolling process and equipment for magnesium alloy slab

[0030] After the AZ31 magnesium alloy ingot is preheated, it is put into the 100kg resistance melting furnace 1, and when the temperature reaches 300°C, the mixed gas (SF 6 +CO 2 + air, proportional to SF 6 : 0.1%, CO 2 : 4.9%, dry air: 95%;). When the temperature reaches 500°C, carry out stirring and refining, ventilate and blow slag and let it stand for 10 minutes. Under the protective gas, the magnesium alloy liquid is then transported to the front box 3 through the launder 2, and the front box 3 keeps the magnesium alloy liquid at a constant temperature of 600°C to control the inflow. The magnesium alloy liquid of the casting roll has a relatively constant liquid level, which is 2cm higher than the center line. The magnesium alloy liquid passes through the nozzle 5 at the same temperature and enters the casting machine 6 at a uniform flow rate. The casting temperature is controlled at 500°C under the protective gas , The diameter of the 6 rolls of the casting and rolling m

[0032] After the AZ31 magnesium alloy ingot is preheated, it is put into the 550kg resistance melting furnace 1, and when the temperature reaches 400°C, the mixed gas (SF 6 +CO 2 + air, proportional to SF 6 : 0.4%, CO 2 : 20%, dry air: 79.6%;). When the temperature reaches 600°C, carry out stirring and refining, ventilate and blow slag, and let it stand for 20 minutes. Under the protective gas, the magnesium alloy liquid is then transported to the front box 3 through the launder 2, and the front box 3 keeps the magnesium alloy liquid at a constant temperature of 700°C to control the inflow. The magnesium alloy liquid of the casting roll has a relatively constant liquid level, which is 4cm higher than the center line. The magnesium alloy liquid passes through the nozzle 5 at the same temperature and enters the casting machine 6 at a uniform flow rate. The casting temperature is controlled at 600°C under the protective gas , the roll diameter of the cast-rolling machine is 600mm

[0034] After the AZ31 magnesium alloy ingot is preheated, it is put into the 1000kg resistance melting furnace 1, and when the temperature reaches 500°C, the mixed gas (SF 6 +CO 2 + air, proportional to SF 6 : 1%, CO 2 : 49%, dry air: 50% ;). When the temperature reaches 700°C, carry out stirring and refining, ventilate and blow slag, and let it stand for 30 minutes. Under the protective atmosphere, the magnesium alloy liquid is then transported to the front box 3 through the launder 2, and the front box 3 keeps the magnesium alloy liquid at a constant temperature of 800°C to control the inflow. The magnesium alloy liquid of the casting roll has a relatively constant liquid level, which is 6cm higher than the center line. The magnesium alloy liquid passes through the nozzle 5 at the same temperature and enters the casting machine 6 at a uniform flow rate. The casting temperature is controlled at 700°C under the protective gas , the roll diameter of the casting and rolling mach