What are some things to pay attention to when casting cast iron platforms?

The cast iron platform casting material includes original pig iron HT250,mainly using Z25,Z20,Z18,Z15,and Z14 pig iron.Original pig iron containing white or coarse graphite cannot be used,as the white or coarse graphite in the original pig iron will be inherited into the casting.

As a manufacturer of cast iron platforms,it is recommended to use low-carbon steel as much as possible and avoid severe rust.Its thickness should be greater than 2mm.High alloy steel should be used separately,and high alloys containing tungsten should not be used.

Return to furnace iron:Return to furnace iron mainly refers to the smoking port of castings,casting waste,and sand boxes,which should be filled with core sand and sticky sand.The amount of return to furnace iron should be adjusted according to the amount of return to furnace iron.Different grades of return to furnace iron should be stacked separately and labeled.

Ferroalloy:Ferroalloy mainly refers to 75%ferrosilicon and 75%ferromanganese,used to regulate the content of silicon and manganese in molten iron.

Cast iron platform pouring process:pouring temperature is 1320-1400℃,with high pouring temperature for small parts and low pouring temperature for large parts.The molten iron is transparent and turns blue.At℃,small castings with a wall thickness of 5mm can be poured.When the surface of the molten iron shows flashing patterns,only the castings with a wall thickness can be poured without processing.If the molten iron sticks to the package,the castings cannot be poured again.

Standard operation:Pour the mold that is cast on the same day to reduce moisture absorption and avoid long-term parking of the mold;Strictly mix ingredients,weigh,and maintain a suitable height of the material column;Operate according to regulations and avoid accidents.Only by maintaining"four stability"(stable furnace size,stable bottom coke height,stable air flow control,and stable qualified furnace materials)and"three connections"(keeping the air outlet,slag outlet,and iron tapping port bright,unobstructed,and clean)can the melting be stable and the iron liquid be excellent.