A kind of glass-lined steel plate and its manufacturing method

Abstract

The invention provides a steel plate used for a glass lining and a production method thereof. The steel plate comprises the following chemical components: 0.05%-0.15% of C, not more than 0.20% of Si, 0.50%-1.60% of Mn, not more than 0.025% of P, not more than 0.020% of S, 0.06%-0.18% of Ti, 0.005%-0.050% of Als, not more than 0.0030% of O, not more than 0.0060% of N and the balance of iron and inevitable impurities, wherein a ratio of Ti to C is 1.0-1.5. The production method of the steel plate comprises the steps of smelting, continuous casting, rolling and normalizing treatment, wherein the heating temperature of a casting blank is at 1180-1250 DEG C, two-stage rolling is adopted, the rolling temperature of a rough rolling stage is not less than 1100 DEG C, the rolling temperature of a finish rolling stage is at 920-1000 DEG C, the finish rolling temperature is at 900-840 DEG C, and the accumulated deformation quantity is not less than 60%; the normalizing temperature is at 920-960 DEG C, and the net thermal insulation time is 1.0-3.5 min / mm. According to the steel plate provided by the invention, through controlling the ratio of Ti to C to 1.0-1.5, the content of Ti is 0.06%-0.18%, the steel has good scale explosion prevention performance after lining burning, the lining burning frequency is reduced, the energy is saved, and the cost is saved for a user; after lining burning, the intensity level is stable, and a safe and reliable steel plate material is provided for manufacturing industry of glassed steel equipment.

Description

technical field [0001] The invention relates to the field of metallurgical low-alloy hot-rolled steel plates, in particular to glass-lined steel plates and a manufacturing method thereof. Background technique [0002] The so-called glass-lined refers to the coating of glass-lined enamel with high silicon content on the surface of metal (steel) and firing at high temperature to make the enamel adhere to the surface of the steel plate. Therefore, the glass-lined steel plate has the dual advantages of glass-like chemical stability and metal strength. It is precisely because of the unique properties of glass-lined steel plates that glass-lined steel plates are widely used in chemical, pharmaceutical, dye, pesticide, organic synthesis, petroleum, food manufacturing and defense industries to replace expensive stainless steel and non-ferrous metals. [0003] As the main manufacturing material of glass-lined equipment, the performance of steel plate directly affects the quality lev...

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Problems solved by technology

Among them, patent No. 200780035777.X and CN200680050708.1 invention patent have in common that the C content of the steel plate is on the low side, and the strength after enamelling is low, which cannot meet the strength requirements of glass-lined equipment materials. At the same time, Nb element or B element is added, so that increase cost

In the patent No. CN02821685.7, the content of C in the steel plate is also low. The preparation method is that the cast slab is hot-rolled and then cold-rolled and annealed. Strength requirements for glass equipment materials

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