Let's listen to the explanation of the roll manufacturer and select the roll according to the type o

2022-01-15 17:12

In the last issue, we talked about the steel grades to be rolled and the arrangement and pass planning of the rolling mill. Today, let the roll manufacturer Wuxi Taihu roll Xiaobian bring us the explanation of the friction between the roll and the blank and the selection of the roll according to the type of rolling mill.

Roll manufacturer

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Roll manufacturers believe that there are many kinds of roll classification methods, mainly including: (1) according to the product type, there are strip steel roll, section steel roll, wire rod roll, etc; (2) According to the orientation of the roll in the rolling mill series, it can be divided into blank opening roll, roughing roll, finishing roll, etc; (3) According to the roll function, it is divided into scale breaking roll, piercing roll, flat roll, etc; (4) According to the roll raw materials, there are steel roll, cast iron roll, cemented carbide roll, ceramic roll, etc; (5) According to the manufacturing method, it can be divided into casting roll, casting roll, surfacing roll, inlaid roll, etc; (6) According to the condition of rolled steel, there are hot roll and cold roll. Various classifications can be combined accordingly to make the roll have more clear significance, such as centrifugal casting high chromium cast iron work roll for hot strip steel.




-Friction between roll and blank




Because there is a difference between the circumferential speed of the roll and the speed of the blank, friction plays a very important role, especially at low speed, it can have a good bite, such as the billet rolling mill and the roughing mill stand. Therefore, the relevant data create conditions for the proper selection of rolls to suit a specific frame.




-Hot state




The hot state of roll and rolled blank is also important. The primary reason is that the temperature of the roll is much lower than that of the rolled blank, so the roll is vulnerable to high thermal shock in a very short time, which leads to burning crack on the surface of the roll and further diffusion to form fatigue crack. Therefore, the selection of rolls should take into account the less occurrence and diffusion of roll cracks under rolling conditions.




-Roll cooling




The effectiveness of the roll is also related to the placement of the mill coolant. The heat conduction function of roll data has a great influence on the cooling of roll. The higher the thermal conductivity of the roll data, the higher the requirements for useful cooling. The first thing is to prevent the occurrence of burning crack and reduce the service life of the roll.




Select rolls according to mill type




The selection of right and wrong rolls often pays attention to skills, and the experience of rolling mill operators plays a decisive role in the selection of rolls.

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Roll manufacturer

-Bar and compact mill




The requirements of this kind of rolling mill for rolls are: ① good bending strength relative to impact; ② Uniform roll hardness; ③ High wear resistance; ④ Good anti cracking function.




OK, the above is the brief introduction of the roll manufacturer about the friction between the roll and the blank and the selection of the roll according to the type of rolling mill. If you want to know more about roll products and roll manufacturers, please pay attention to the roll manufacturer Wuxi Taihu roll Xiaobian.