Rolling method for composite strip of stainless steel and straight carbon steel

Abstract

A rolling method for a composite strip of stainless steel and straight carbon steel belongs to the technical field of rolling of composite strips and comprises the steps of preparing materials; pretreatment; blank overlaying; heating and heat rolling; unreeling; cold rolling and heat treatment; and finishing. Leading an initial rolling plate into a cold-rolling mill for cold rolling to obtain a cold-rolling composite rolling plate, then conveying the cold-rolling composite rolling plate into a heat treatment furnace for heat treatment, and controlling the temperature for heat treatment to obtain a cold composite rolling plate; and performing finishing on the cold composite rolling plate and obtaining the composite strip of the stainless steel and the straight carbon steel. The rolling method for the composite strip of the stainless steel and the straight carbon steel has the advantages that the rolling method is short in process procedure and high in rolling efficiency so as to save energy; enables the integral combination effect of base plate blank made of the straight carbon steel and composite plate blank made of the stainless steel to be fully ensured; is high in finished product rate; and can meet the requirements of industrialized amplification production.

Description

technical field [0001] The invention belongs to the technical field of metal composite strip rolling, and in particular relates to a rolling method of stainless steel and ordinary carbon steel composite strip. Background technique [0002] The stainless steel mentioned above is not limited to the grades listed in the Chinese national standards: 1Cr13, OCr18Ni9, OOCr19Ni10, OOCr17Ni14Mo and 1Cr18Ni9Ti, etc. The Japanese standard (JIS) defines these five grades as: 410, 304, 304L , 316L and 321. The plain carbon steel mentioned above is also called carbon steel, which is an iron-carbon alloy with a carbon content (WC) of less than 2%. [0003] As known in the industry, stainless steel has the advantages of weather resistance, steam, water and other weak corrosive media, as well as acid, alkali, salt and other chemical corrosion media. However, because it belongs to the category of precious metal resources, its price is relatively expensive, while ordinary carbon Although ste...

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Problems solved by technology

Compared with the explosion method, although the explosive rolling method can produce large-area metal composite panels, the cost is high due to the long production cycle, and the produced metal composite panels do not have a market competitive advantage. The sandwich structure of the metal composite panels is stainless steel on both sides and the middle layer is carbon steel, which makes the cost more expensive

The direct rolling method has not been reported in Chinese and foreign patent documents and non-patent documents, but as far as the inventor of the present application knows: this method generally uses vacuuming or brazing, and the shortcoming of vacuumizing or brazing is that the process is complicated , especially, once the vacuum degree does not meet the requirements or the brazing method is improper, the composite effect will be seriously affected or even non-composite phenomenon will occur. Therefore, the yield of this method is low and cannot meet the requirements of industrial scale-up production

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