Production method for cold-rolled acid-resistant steel 09CrCuSb

Abstract

The invention discloses a production method for cold-rolled acid-resistant steel 09CrCuSb. According to the production method, hot-rolled steel coils of acid-resistant steel 09CrCuSb are taken as raw materials, and the acid-resistant steel 09CrCuSb is produced through acid rolling and welding, acid pickling, cold rolling, continuous annealing and welding, continuous annealing, and flattening. The acid-resistant steel 09CrCuSb comprises the following components in percentage by weight: not greater than 0.12% of C, 0.20%-0.65% of Si, 0.35%-0.65% of Mn, not greater than 0.030% of P, not greater than 0.020% of S, 0.25%-0.45% of Cu, 0.04%-0.10% of Sb, 0.70%-1.10% of Cr, 0.010%-0.030% of Ti and the balance of Fe and inevitable impurities. The acid-resistant steel 09CrCuSb which is high in surface quality, accurate in size, excellent in mechanical property and capable of meeting practical application is obtained through the acid rolling and welding, acid pickling, cold rolling, continuous annealing and welding, continuous annealing, and flattening for the hot-rolling raw materials.

Description

technical field [0001] The invention relates to a steel material production technology, in particular to a production method of cold-rolled acid-resistant steel 09CrCuSb. Background technique [0002] In metallurgy, electric power, petrochemical and other industrial fields, it is generally necessary to use heavy oil or coal to provide power. During the fuel combustion process, due to the high sulfur content, a large amount of sulfur dioxide will be produced. Sulfur dioxide will combine with water at the dew point temperature to form sulfuric acid. Corrosion problems are caused to the flue gas treatment system, such as the air preheater of the boiler, flue, chimney and desulfurization device, which seriously shortens the life of the equipment. This phenomenon is called "sulfuric acid dew point corrosion". In addition, in areas with severe acid rain, sulfuric acid corrosion of steel structures is also very serious. [0003] In order to solve the problem of acid corrosion of ...

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Problems solved by technology

[0004] However, with the rapid development of acid-resistant steel, end customers have increasingly thinner and thinner requirements for acid-resistant steel, and stricter requirements for performance and surface quality. However, the thinnest thickness of hot-rolled acid-resistant steel is about 2.0mm, and the performance fluctuates Large, inaccurate size, rough surface quality, can no longer meet the quality requirements of high-end users

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