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The problems and solution when using HSS Roll

Aug. 08, 2022
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The main problem when using HSS Roll are as below:

First, the surface of the roll is easy to produce oxidation, crack, peeling and other defects.The roll with different chemical composition and metallographic structure should be selected according to different mill stand and rolling environment. The cooling condition of high speed steel roll is stronger than that of high chromium cast iron roll.The cooling water should be as sufficient as possible. It is advisable to replace the original tapered nozzle with a flat nozzle, and use 3/4 cooling water for cooling on the side of the steel outlet of the roll. The surface temperature of the roll should be controlled below 50℃.In addition, the cooling water in the middle of the roll body should double the cooling water at the side of the roll, Some steel plant even increase the cooling water by 40%~60%, so steel rolling manufacturers should consider the cooling water before using high-speed steel roll

Second, the friction coefficient between the roll and the rolling material increases.The friction coefficient between the high speed steel roll and the rolled material is large, the rolling load increases, and it is easy to slip, adopt Oil lubrication, strip surface cooling, reducing the blank temperature to reduce the friction coefficient. In addition, optimizing the composition of high speed steel roll is also an effective way to reduce the friction coefficient.

Third, roll damage caused by steel rolling accident.High speed steel material has low impact toughness, high brittleness and weak anti-accident performance. Therefore, it is necessary to strengthen management to ensure the normal operation of the mill and reduce the damage caused by rolling accidents.

We are committed to supplying high quality HSS rolls. any inquiry, feel free to contact with myron.zhu@bkdrtech.com

 

The problems and solution when using HSS Roll

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