How are carburizers classified according to material? Let's take a look:
Carburizing agents are generally divided into metallurgical coke carburizing agent, calcined coal carburizing agent, petroleum coke carburizing agent, graphitization carburizing agent, etc.
(1) The so-called metallurgical coke carburizing agent is the large coke usually used in cupola. In addition to smelting, its function is to carburize the metal charge, and its indicators will not be repeated.
(2) Calcined coal carburizing agent, the composition is generally C: 90-93%, s0.3-0.5 It is mainly used in steel-making enterprises, and some casting enterprises are used in gray cast iron. The disadvantages are low carbon content, slow melting, waste of electric energy and large residue.
(3) Petroleum coke carburizing agent is not very good for casting. Petroleum coke from Shandong and Tianjin can be used for casting gray cast iron. The composition is generally C: 96-99%; S0.3-0.7%。 It is mainly used for steelmaking, gray cast iron, brake pads, cored wires and so on.
(4) Graphitized carburizing agent is mainly produced in Shandong, Henan, etc. there are few manufacturers. The main materials are graphite fossil oil coke and graphitized electrode. The general composition is carbon content > 98-99.5%; Sulfur < 0.05-0.03 It is mainly used for nodular cast iron. It is characterized by fast absorption, high carbon and low sulfur.
