High magnesium wire

Feed wire spheroidization (high magnesium wire) is a new nodular cast iron spheroidization process in recent years. This process has been quickly used in the production industry of water-cooled metal ductile iron pipes and in the fields of sand mold, lost foam, hot mold ductile iron casting, etc., and it has become popular very quickly. This spheroidizing process has been widely promoted and applied in the ductile iron industry.

The chemical composition of the core material spheroidized powder in the high-magnesium wire is the composition of the composite alloy smelted by the intermediate frequency furnace. Its spheroidizing effect is far better than nitrogen spraying magnesium spheroidizing (using pure magnesium powder and blowing nitrogen into molten iron, because nitrogen blowing magnesium, the temperature of molten iron will be reduced by about 100 ℃. And because of the single composition, the spheroidization declines quickly , the effect of degassing and slag removal is not good, and the castings are prone to pores and slag inclusions). Subcontracted pure magnesium block spheroidization (also has a single component, the spheroidization decays quickly, the degassing and slag removal effects are not good, and the castings are prone to pores and slag inclusions. Moreover, the spheroidization process is troublesome, and the molten iron needs to be turned into the subcontractor first. After spheroidizing, pour it into the casting ladle, and then go to casting. Because the ladle needs to be turned twice, the temperature of molten iron should be increased by more than 100°C during spheroidizing). Synthetic high-magnesium powder is fed into spheroids. Because it is synthetic, the ratio of magnesium powder is uneven, fluctuating high and low. In addition, the higher the magnesium, the less other components, and there are also serious problems such as rapid decline of spheroidization, poor degassing and slag removal, and easy generation of pores and slag inclusions in castings.