3results about How to "Reduce rolling costs" patented technology

The invention provides a method for preventing steel adhesion to a guide disc when a pipe mill rolls CrMo alloy steel, which comprises the following steps of: before rolling the CrMo alloy steel, rolling common carbon manganese steel or low alloy steel, and starting cooling water to cool the guide disc during the rolling time, so that the guide disc is in a chilling and heating state, and hardening the working surface of the guide disc; and after the working surface is quenched to form a ferroferric oxide oxidation film, rolling the CrMo alloy steel by using a guide disc. And the ferroferric oxide oxidation film can effectively prevent a rolled piece from being adhered to the working surface of the guide disc during rolling, so that the occurrence frequency of the problem of adhering steel to the guide disc is reduced. According to the method for preventing the guide disc from being bonded with the steel when the pipe mill rolls the CrMo alloy steel, the method can be implemented without greatly changing equipment, operation is easy, the application range is wide, the problem that the guide disc is bonded with the steel when the pipe mill rolls the CrMo alloy steel can be effectively solved, and the service life of the pipe mill is prolonged. And positive significance is achieved in the aspects of improving the product quality, reducing the rolling cost, improving the production efficiency and the like.

This invention discloses a rolling method for 0.1mm thick ultra-flat and ultra-hard precision stainless steel sheets, including: preset rolling parameters, production preparation, rolling, and post-rolling cooling. The preset rolling speeds are: 100-120 m / min for the first pass, 90-100 m / min for the final pass, and 110-120 m / min for intermediate passes; the preset rolling pressures are: 740-800 KN for the first pass, 950-1000 KN for the second pass, and [missing information - likely related to the final pass]. The rolling pressure is 700-760 kN, with intermediate passes at 700-800 kN; the rolling oil temperature throughout the rolling process is 35-40℃; the preset plate profile curve is set as follows: slope value -20-40, center waviness value 80, and edge waviness value 20; the rolls are M42 rolls with a diameter of 38-40 mm; the roughness of the rolls used in the finishing pass and the pass preceding the finishing pass is 0.4-0.5 μm, and the roughness of the rolls used in the first pass and the remaining intermediate passes is 0.5-0.6 μm. This invention can produce 0.1 mm ultra-flat and ultra-hard precision stainless steel sheets with qualified and uniform surface roughness and flatness, small thickness tolerance fluctuations, stable surface quality, and effectively improved rolling accuracy, product qualification rate, and production efficiency.

The application discloses a kind of hot rolling methods of train brake beam full continuous rolling based on small square billet, comprising the following steps: (1) the billet after being heated to preset temperature is pushed out from heating furnace, and 6-9 passes of blooming rolling is carried out to small square billet by using cross-column type rolling mill;(2) the small square billet material after preliminary rolling by cross-column type rolling mill is further continuously rolled by 6-7 passes using flat-stand alternation type continuous rolling mill set.The hot rolling mode of cross-column type plus flat-stand alternation type full continuous rolling and the redesigned pass structure are used to produce train brake beam, and the rolling efficiency and yield of the product are greatly improved through continuous and rapid rolling by continuous rolling mill set, which greatly improves the rolling efficiency, and also greatly improves the stability and uniformity of the finished product, reduces the rolling cost and increases the economic benefit.