In the smelting process of steel products, the smelting loss of carbon in the molten iron is often increased due to factors such as long smelting time, insulation time, and overheating time, resulting in a decrease in the carbon content in the molten iron, which causes the carbon content in the molten iron to fail to reach the theoretical value expected in refining.
Shandong Guanxian Qitian Graphitized Petroleum Coke Co., Ltd. produces various types of recarburizers, including graphitized petroleum coke, semi-graphitized petroleum coke, high-purity graphite, artificial graphite, and graphite electrode crushed products.
What is the carburizer used for?
1. Increase the carbon content
Compensate for carbon burnout: During the smelting process of steel products, due to factors such as long smelting time, insulation time, and overheating time, the melting loss of carbon elements in the molten iron will increase, resulting in a decrease in the carbon content in the molten iron, which cannot reach the expected theoretical value of refining. The carburizer can make up for this part of the burned carbon content to ensure the carbon content requirements of specific grades of steel.
Increase the graphite nucleation core of the molten iron: The use of carburizer helps to increase the graphite nucleation core in the molten iron, which is crucial for the graphitization process of cast iron products, can reduce the tendency of white cast iron, and improve the machinability and mechanical properties of cast iron.
2. Improve physical properties
Increase strength and toughness: Increasing the carbon content in steel will increase the concentration of C elements at the grain boundaries, thereby increasing the strength at the grain boundaries and improving the toughness and ductility of steel.
Reduce shrinkage tendency: During the solidification of molten iron, graphitization has an expansion effect. Good graphitization can reduce the shrinkage tendency of molten iron and prevent or reduce defects such as shrinkage cavities and shrinkage in castings.
3. Improve chemical properties
Improve machinability: The use of carburizer can reduce white spots, significantly improve machinability, and make the cutting surface smoother.
Improve alloy properties: After adding a certain amount of Cr, Ni and other elements to alloy steel, corresponding carbides can be formed by increasing the carbon content, thereby improving the hardness and wear resistance of alloy steel.
4. Reduce costs
Increase the amount of scrap steel: In the casting process, the use of carburizer can greatly increase the amount of scrap steel, reduce the amount of pig iron or no pig iron, thereby reducing the cost of castings.
Use rusty scrap: The addition of carburizer makes it possible to use rusted scrap and alloys, further reducing the cost of molten iron.
5. Other functions
Extend the service life of the furnace wall: The use of carburizer can extend the service life of the furnace wall and reduce maintenance costs.
Reduce the amount of slag generated: The use of carburizer can reduce the amount of slag generated and make the slag removal operation simpler
