Copper mould tube needs to meet the performance:Good thermal conductivity, condensation of liquid metal in the copper mould tube. When the copper tube is working, the surface of the inner cavity is heated in the gradual condensation state of the liquid metal, and the back is transferred in the circulation of the cooling water to realize heat. Conduction, about 5%-20% of the heat passes through the copper plate, and the tube exchanges heat. Therefore, it is generally made of a copper or copper alloy with good thermal conductivity.
Better high temperature strength, in the environment of continuous intense heat exchange, the copper plate and the copper tube not only maintain good strength at normal temperature, but also maintain heat conduction at the temperature of 200-300 °C. , no recrystallization softening, no obvious plastic deformation, good mechanical properties
High thermal conductivity
The copper tube of the crystallizer needs to have extremely high thermal conductivity so that the heat of the molten steel can be quickly conducted away to form a solid ingot shell. This helps to improve the cooling rate and production efficiency of the ingot.
Wear resistance
Since the copper tube of the crystallizer will experience high-frequency friction and wear during use, it needs to have excellent wear resistance to extend its service life.
Corrosion resistance
The copper tube of the crystallizer needs to have good corrosion resistance to resist the erosion of chemicals in the molten steel and cooling water, thereby extending its service life.
High strength and hardness
The copper tube of the crystallizer needs to have sufficient strength and hardness to withstand the impact and pressure of high-temperature molten steel while maintaining the stability of its shape and structure.
Excellent thermal fatigue performance
The copper tube of the crystallizer needs to have good thermal fatigue performance to withstand frequent temperature changes and thermal cycles without cracking or deformation.
Good surface quality
The inner surface of the crystallizer copper tube needs to be smooth and flat to reduce the friction between the molten steel and the copper tube, reduce the defects on the surface of the ingot, and improve the quality of the ingot.
Good cooling effect
The crystallizer copper tube needs to be designed with reasonable cooling water channels to ensure that the cooling water can flow through the copper tube evenly and efficiently, so as to achieve the best cooling effect.
High temperature oxidation resistance
Under high temperature conditions, the crystallizer copper tube needs to have good high temperature oxidation resistance to prevent the formation of surface oxide layer, so as to maintain its thermal conductivity and wear resistance.
Dimensional stability
The crystallizer copper tube needs to maintain dimensional stability under high temperature and high pressure conditions to ensure the accuracy of the size and shape of the ingot.
Easy maintenance and replacement
The design of the crystallizer copper tube needs to take into account easy maintenance and replacement, so that it can be quickly replaced after damage or wear, reducing downtime and improving production efficiency.
By meeting the above performance requirements, the crystallizer copper tube can play its best performance in the continuous casting process, ensuring the high quality of the ingot and high efficiency of production.
