A glass-lined steel with excellent plasticity, toughness and scale explosion resistance and its manufacturing method

Abstract

Disclosed is steel with excellent plasticity and toughness and scale explosion resistance used for glass lining and a manufacturing method thereof. The steel comprises the following components, by weight: 0.02-0.06% of C, 0.15-0.35% of Si, 0.50-1.00% of Mn, no more than 0.035% of P, 0.002-0.035% of S, 0.010-0.055% of Al, 0.001-0.009% of N, 0.15-0.25% of Ti, 0.005-0.10% of Cu, 0.005-0.065% of Cr, no less than 0.05% of Ni, and no more than 0.05% of Mo, with the balance being Fe and unavoidable impurities, wherein Ti%=4C%+3.43N%+1.5S%+(0-0.05%) and 0.15%<=5C%+2.5S%+4.43N%<=0.40%. The steel used for glass lining has excellent plasticity and low temperature toughness, scale explosion resistance, adherence and weldability, can meet the requirements of double-sided coating, and is especially suitable for manufacturing glass lining equipment, accessories, enamel products and the like with complex processing and forming, service temperature being -20 DEG C or even lower and high quality requirements of coating.

Description

technical field [0001] The invention relates to glass-lined steel, in particular to a glass-lined steel with excellent plasticity, toughness and scale explosion resistance and a manufacturing method thereof, which can be used for glass-lined equipment and glass-lined accessories, and can also be used for making enamel containers, Tanks and products, etc. Background technique [0002] The glass lining process is to coat the vitreous glaze containing high silica components on the surface of the processed steel substrate, and then sinter at high temperature to make the glaze firmly adhere to the surface of the steel substrate to form a composite material. The process of the composite material is glass-lined. Generally speaking, in order to achieve a more ideal glass layer, it often takes about 8 times of repeated enamelling and firing. The glass-lined equipment made by the glass-lined process has the advantages of the stability of glass and the strength and toughness of steel...

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Problems solved by technology

[0006] Chinese patent CN104233063A discloses the composition of the steel plate as follows: C: 0.05-0.15%, Si≤0.15%, Mn: 0.80-2.0%, P: 0.05-0.12%, S≤0.020%, Ti: 0.09-0.20%, Nb: 0.03 ~0.07%, V: 0.01~0.05%, Als: 0.005~0.050%, N≤0.0060% and Ti / C: 1.5~3.0, the steel plate needs normalizing treatment, and the steel contains 20~30% pearlite, elongation 31 to 33.5%, without providing impact energy, in actual use, the anti-scaling performance of the steel plate basically only meets the requirements of one-sided enamelling

[0007] With the continuous expansion of the application field of glass-lined equipment and glass-lined accessories, not only the processing and molding are more complicated, but also the service environment of the equipment is getting worse and worse. For example, it is required to be used in a lower temperature environment below -20°C, especially at low temperature When used alternately with higher temperature and different temperature environments, the existing glass-lined equipment and accessories made of glass-lined steel are difficult to meet its use requirements

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