Introduction of texturing technology and classification of chrome-plated rollers

The appearance of the textured chrome-plated roller technology is due to the general shortcomings of poor precision and lack of wear resistance of domestic chrome-plated rollers, which often lead to the downtime of the replacement rollers, affecting normal production. The use of textured chrome roll technology has achieved outstanding economic benefits.

The texturing treatment of the chrome-plated roll is to texturize the surface of the roll to increase its friction coefficient and make it adhere more closely to the strip during operation. In addition, due to the action of the gas stored in the chrome-plating roll pit, a protective gas film is formed between the strip and the chrome-plating roll to prevent the strip from being scratched by the chrome-plating roll. This has a very important impact on the continuous use of chrome rollers.

Chrome roll texturing techniques include shot peening, EDM texturing and laser texturing. Among them, laser texturing technology is better, but its application maturity in China is lower than that of traditional shot peening technology. After shot peening, the hardness and fatigue strength of the surface of the chrome-plated roll are improved, which can effectively reduce the sliding probability between the strip and the chrome-plated roll, and then prevent the strip from being scratched.

The idlers on the domestic cold rolling production line are generally made of rubber rollers and ordinary steel rollers, which have poor precision and wear resistance, often causing downtime and replacement of idlers, affecting normal production. chemical chrome roller.

In most cases, chrome rolls are machined and polished steel rolls with a hard chrome coating on them. In most cases, the added coating is bright white. If you look closely, you'll see that the color is a bit bluish; the chrome roller has at least two filaments or 20 microns thick. Otherwise, the hard chrome process will not work. The main functions and advantages of chrome rollers are as follows:

1. The advantage of chrome-plated rollers is high hardness. Compared with the actual production and application environment, the hardness after heat treatment is higher than that of metal pipes such as alloy steel and round steel of the same grade. Other quenching processes, such as carburizing, nitriding and high frequency, are slightly inferior. In practical measurements, the hardness of chrome-plated rolls is generally between 55-65 Rockwell degrees. roller

2. High wear resistance and low friction coefficient. Since the hardness of the chrome-plated steel roller is greatly improved, with the improvement of the finish, the friction coefficient decreases relatively, and the service life of the chrome-plated steel roller also decreases accordingly.

3. Because the chrome plating layer of the chrome plating roller is different, because the chrome plating layer of the chrome plating roller is very stable in different environments, it is not easy to produce chemical reactions, and will not be corroded by some acid and alkali liquids and gases.