Extend the life of the roller
There are four main forms of roll damage: roll body fracture, roll neck fracture, peeling and roll body cracking. Among them, roll peeling is the main damage form, and it is also the main reason for roll damage and even early scrapping.
Roll spalling not only causes difficulty in roll grinding organization, but also greatly increases the direct cost of strip production, which directly threatens the long-term normal and stable operation of the strip rolling production line. Therefore, it is very necessary to explore the causes of roll peeling and find an effective method to extend the service life of the roll.
Precision roll manufacturers have summarized the methods to extend the service life of rolls:
The molten steel in the furnace is injected into the mold through the gap between the surface of the roller core and the wall of the copper mold. The water-cooled copper mold not only solidifies the molten steel to form a composite layer, but also acts as a non-consumable electrode. Provide electricity in the slag pool to supplement the continuous consumption of heat energy. A very thin layer on the surface of the roller is melted and needs to be filled with composite liquid metal. A composite layer is formed between the roller core and the copper mold. The filling of molten steel can be continuous or step by step according to a preset program. The molten steel pushes the molten slag to the top, occupies the original position of the slag and fuses with the molten part of the roll core to form a composite layer. In the compounding process, the melted and solidified part is pulled out of the copper mold, and the next part is poured. Using ESSL coil technology to produce a new generation of high-speed steel composite rolls. This kind of roll contains a large amount of carbide forming elements, and the service life of the roll is increased several times. It not only resists thermal fatigue, but also resists all kinds of corrosion.
Tube Mill Machine Line=>Cold Rolling Mill=>Tube Mill Components
