Ductile Iron Casting

Ductile Iron Castings is a kind of casting process, in which rare earth magnesium alloy is used as nodularizing agent. The furnace is the same as gray iron. In order to ensure good spheroidization, the content of sulfur and phosphorus should be controlled to be lower. Considering the temperature loss during inoculation, the temperature of molten iron should be higher than that of gray iron. According to the grade of nodular iron produced, sometimes the carbon content should be controlled and a certain proportion of scrap steel should be added into the furnace charge. We also need to make a inoculation ladle, a sampling spoon, a triangular test piece and a cylindrical specimen mold. There are some steel chips and straw ash from the lathe. Stirring rod for hot metal mixing (the steel bar is wrapped with 10 mm thick graphite or carbon powder at the head. Before blowing in, the rare earth alloy, ferrosilicon, ferromanganese and other alloy components required by the product are smashed into small pieces with particle size of about 15mm. According to the amount of molten iron required for each package, the iron will be weighed