high speed steel rollDevelopment and production status

High speed steel roll is a hot roll material with short history, rapid development and wide application prospect. High-speed steel, also known as wind steel or pointed steel, means that it can harden even if it is cooled in air during the quenching process and is very sharp. It is a complex composition of alloy steel, containing tungsten, molybdenum, chromium, vanadium and other carbide forming elements. The total amount of alloying elements is about 10% to 25%. The application of high-speed steel roll is an important part of the development of modern steel rolling production. This is another major change in the development of the iron and steel industry after microalloying, controlled rolling and cooling technology. In Japan, high-speed steel rolls have been widely used in the production of steel rolling of plates, profiles, bars and wires, not only for work rolls, but also for support rolls. The good wear resistance of high-speed steel rolls is closely related to their different characteristics from traditional rolls.

The unit price of high-speed steel rolls is indeed higher than that of high-boron and high-nickel-chromium rolls. However, due to material characteristics, the steel passing capacity of high-speed steel rolls is much higher than that of high-boron and high-nickel-chromium rolls. For example, the passing capacity of 12 1/4-cut rebar, high-speed steel K1 single-groove steel is 350 tons, high-boron is only 150 tons, and high-nickel-chromium is only 100 tons, the high nickel chromium content is only 600 tons. In addition, the hardness and wear resistance of high-speed steel are good, and the heavy load is low, so the service life is much higher than that of high-boron and high-nickel-chromium rolls.

　　high speed steel rollAdvantage Analysis 1: The consumption of tons of high-speed steel rolls is much lower than that of high-boron and high-nickel-chromium rolls; the annual purchase cost of high-speed steel rolls is much lower than that of high-boron and high-nickel-chromium rolls. Advantage Analysis 2: The passing steel capacity of high-speed steel rolls is 2-4 times that of high-boron and high-nickel-chromium rolls. That is to say, the number of slot changes of high-speed steel rolls is much lower than that of high-boron and high-nickel-chromium rolls. In this way, the use of high-speed steel rolls will increase the continuous operation time of the production line. Compared with high-boron and high-nickel-chromium rolls, the annual rolling output will increase by 2%-4%.

In the mid-1990s, it was the first to develop centrifugal casting high-speed steel rolls in China, and was successfully applied to hot-rolled narrow strip mills, and then successfully applied to bar mills, high-speed wire mills and spring flat steel mills. The technology in 2001 won the national invention patent, in 2005 the development of centrifugal castinghigh speed steel rollRing also won the national invention patent.