Nickel-saving high-strength stainless steel raw material composition

Abstract

The invention discloses a nickel-saving high-strength stainless steel raw material composition which comprises the following components in percentage by weight: less than or equal to 0.15% of carbon, less than or equal to 1% of silicon, 4-8% of manganese, 17.5-21% of chromium, 2.0-4.5% of nickel, 1.0-4% of copper, 0.2-0.35% of nitrogen, less than or equal to 0.4% of molybdenum and the balance of iron. The invention further discloses a smelting process of the nickel-saving high-strength stainless steel raw material composition. The austenitic stainless steel prepared from the composition provided by the invention has excellent performances of strong corrosion resistance, high strength, good toughness and strong antibacterial property, and meanwhile, the proportion of nickel in the component content of the austenitic stainless steel is relatively low, so that the use of scarce resource nickel can be reduced, and the cost is further reduced; according to the invention, the ventilation deoxidization system is used for deoxidization, and a deoxidizing agent does not need to be added for deoxidization, so that the step of filtering the deoxidizing agent after the deoxidization is completed is omitted, the working intensity is reduced, and the deoxidizing agent residue caused by the use of the deoxidizing agent is also avoided.

Description

technical field [0001] The invention relates to the technical field of stainless steel manufacturing, in particular to a nickel-saving high-strength stainless steel raw material composition. Background technique [0002] Stainless steel is the abbreviation of stainless and corrosion-resistant steel. The steel that is resistant to weak corrosive media such as air, steam, and water, or has stainless steel is called stainless steel; the steel that is resistant to chemical corrosion is called corrosion-resistant steel. In terms of hardness, the hardness of stainless steel is higher than that of aluminum alloy, and the cost of stainless steel is higher than that of aluminum alloy; [0003] Stainless steel is more and more widely used, especially austenitic stainless steel, because of its good corrosion resistance and processability, it has attracted more and more attention from users, but its composition contains nickel. The general nickel content in 304 stainless steel It accoun...

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Problems solved by technology

[0003] Stainless steel is more and more widely used, especially austenitic stainless steel, because of its good corrosion resistance and processability, it has attracted more and more attention from users, but its composition contains nickel. The general nickel content in 304 stainless steel It accounts for about 8%. Nickel is a scarce strategic resource in my country, which is very precious. The domestic mineral reserves are small, and the focus is on imports, so the production of nickel-saving stainless steel is particularly urgent; and the existing nickel stainless steel production process uses deoxidizers. For deoxidation, the deoxidizer needs to be filtered out after the deoxidation is completed, which increases the work intensity

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