Preparation method capable of reducing peeling defect of 200-series economical austenitic stainless steel

Abstract

The invention discloses a preparation method capable of reducing a peeling defect of 200-series economical austenitic stainless steel. The 200-series austenitic stainless steel comprises the following chemical components in percentage by mass: 0.130%-0.145% of C, 8.45%-8.85% of Mn, smaller than or equal to 0.003% of S, smaller than or equal to 0.020% of P, 0.30%-0.45% of Si, 14.20%-14.60% of Cr, 1.20%-1.40% of Ni, 0.015%-0.030% of Mo, 0.24%-0.40% of Cu, 0.14%-0.16% of N, smaller than or equal to 0.0050% of O and the balance of Fe and other inevitable impurities. The preparation method comprises the processes of smelting, continuous casting, steel rolling, annealing and pickling. According to the preparation method, by reducing the Mn content in the steel and controlling the Mn content at 8.45-8.85%, increasing the Cr content and controlling the Cr content at 14.20-14.60%, and properly increasing the heating temperature of a heating furnace to 1,300 DEG C, the hot workability of a casting blank during rolling is improved; through cooperation with a reasonable production process, on the basis of not increasing the production cost, the performance requirement of the 200-series austenitic stainless steel can be met, the incidence of the steel plate peeling defect is remarkably reduced, and the qualified rate of the product is increased.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a preparation method for reducing peeling defects of economical 200 series austenitic stainless steel. Background technique [0002] With the rapid development of my country's national economy, the demand for stainless steel in the areas of people's livelihood such as building decoration, sanitary and kitchen supplies, household appliances and transportation continues to increase. my country is a country lacking in nickel resources, and needs to import a large amount of nickel, which plays an important role in stainless steel. In order to rationally allocate resources and save production costs, the nickel-saving 200 series economical austenitic stainless steel can completely replace the 300 series austenitic stainless steel with high nickel content for people's livelihood fields that require low corrosion resistance and a relatively mild application environment. ....

AI Technical Summary

Problems solved by technology

Generally, it is necessary to adjust the purity level of molten steel, continuous casting and rolling processes in order to reduce the incidence of steel plate peeling defects, which will inevitably lead to increased production costs and production difficulties

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