[Technology] Magnesium alloy smelting and shielding gas
When the temperature reaches 350°C, the furnace will automatically provide protection gas and the protection gas will be SF6 and N2. 5. The material must be worn when the material is handled to avoid danger. The material must be heated to about 150°C before use. Remove surface moisture and clean the surface of the spoon. The magnesium ingot mold was removed from the oven preheated at about 150°C, placed on the ground before feeding and feeding, the N: flowmeter value was kept at 100, the SF6 flowmeter value was adjusted to 20-30, and the mixed gas flow rate value Keep at 80. Operate with 5 minutes of ventilation at this flow rate.
Lift up the lid, tilt the spoon 300, slowly into the liquid, put the 3/4 liquid capacity of the material spoon, slowly raise the liquid surface, gently pour the liquid into the magnesium ingot mold, and Magnesium ingot mold caps; when mixing materials can not stir the liquid. After the cover is opened, the longest cover opening time is 3min, otherwise it will cause a fire, and the cover must be closed in time. After taking the material, close the cover. If you want to re-acquire the material, you must wait 10-15min. The material liquid that burns on the ground needs to be extinguished with dry sand in time and clean the ground; the proportion of adjusting SF6 after the end of the material taking is normal, N: the flow rate is 100, the flow rate of SF6 is 7-8, mixed Air flow value is 7080. It is worth noting that the sealing surface of the furnace lid can not have waste residue. When it is removed, it must be removed before it is removed. Otherwise, it will cause poor furnace sealing and accelerate the oxidation of the feed liquid.
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