H2. Spheroidal graphite casting is a kind of casting process, and now it is made of rare earth magnesium alloy as spherifying agent, iron furnace and gray iron are the same. In order to ensure good spherification, the content of sulfur and phosphorus should be controlled lower. Considering the loss of temperature during gestation, the temperature of molten iron should be higher than that of gray iron. According to the production of the plate number, sometimes control the carbon content, to add a certain proportion of scrap steel in the burden. We also need to make an iron water bag, sample ladle, triangle specimen and cylindrical specimen. A number of steel castings and straw ash coming off the lathe. Stir-stirring rod (steel bar with 10mm thick graphite or carbon powder attached to the head. Before the furnace, the other alloy components needed for rare earth alloys, ferrosilicon, ferromanganese and products are smashed into small pieces of about 15mm. Weigh the amount of iron required for each packet.
