In the process of steel rolling (mainly cold rolling), in order to reduce the friction between the roller and the rolled material, reduce the rolling force and power consumption, make the rolled material easy to extend, control the rolling temperature, and increase the quality of the rolled product, in Add lubricating coolant between the contact surface of the roll and the rolled material. This process is called steel rolling.Process lubrication。

Cold rolling usually uses hot rough rolling and finish rolling to obtain a steel coil with a thickness of 2~4mm, which has been pickled and annealed as a blank, and is rolled into a thickness of 0.8mm to 0.01 using a multi-roller mill (reversible or continuous rolling) mm thin plate. Because cold metal has great deformation resistance, the rolling force of modern cold rolling mills has reached thousands of tons, and the rolling speed is close to 2500m/min. Obviously, during such a high-speed deformation process of metal, on the one hand, a large amount of heat energy is generated due to the friction between the internal molecules of the metal; on the other hand, the thinning (extension) of the rolled material inevitably causes relative movement between the roller and the surface of the rolled material. .

The basic requirements for cold rolling process lubricants are:

1. Appropriate oiliness means that under high rolling pressure, a boundary oil film can still be formed to reduce friction resistance and metal deformation resistance; reduce roll wear and increase roll service life; increase reduction, reduce rolling passes, and save money. Energy consumption. However, from time to time, it is necessary to consider that there must be friction between the roller and the steel in order for the steel to bite into the roller. If the friction coefficient is too low, it will slip. So the lubrication performance is appropriate

2． Good cooling capacity means that it can absorb the heat generated during the rolling process to the maximum extent and achieve constant temperature rolling to maintain a stable roll shape and keep the strip thickness uniform;

3. It has a good washing and cleaning effect on the surface of rolls and strips. To remove impurities and dirt mixed in from the outside world and increase the surface quality of steel;

4. Good physical and chemical stability. During the rolling process, it does not react chemically with the metal and does not affect the physical properties of the metal;

5. Good annealing performance. In modern cold-rolled strip production, in order to simplify the process, increase labor productivity and reduce costs, when intermediate annealing is required, a production process of direct annealing without degreasing cleaning is adopted. This requires that the lubricant does not remain on the surface of the steel and cause annealing corrosion (that is, spots on the surface of the steel);

6. Good filtering performance. In order to increase the surface quality of steel, some rolling mills use high-precision filtering devices (such as diatomaceous earth) to remove impurities in the oil to the greatest extent possible. At this time, it is necessary to prevent the additives in the oil from being adsorbed or filtered out to maintain the quality of the oil;

7. It has good oxidation stability and long service life;

8． Good rust resistance. It can play a good anti-rust role for short-term storage between processes;

9. It should not contain substances harmful to human health and pungent odors;

10. Oil source, easy to obtain and low cost.

Hot rolling process lubrication

Increasing the output of hot strip rolling units, reducing consumption and increasing productivity is an important thing in the steel rolling process. Practices in various countries have proven that the use of hot rolling oil can reduce roll wear, reduce power consumption, improve the surface quality of steel plates, and increase productivity.

The following benefits can be obtained by using hot rolling (proven in practice):

1. Improved roll surface condition.

2. The unit consumption of rolls is reduced.

3. Reduced power consumption.

4. Increased surface quality of strip steel.

5. Reduce the rolling pressure and easily realize rolling of thin strip steel.

6. Promote research on hot rolling theory.