Chromium-saved duplex stainless steel with phase-change plasticization effect and preparation method of chromium-saved duplex stainless steel with phase-change plasticization effect

Abstract

The invention relates to a chromium-saved duplex stainless steel with a phase-change plasticization effect and a preparation method of the chromium-saved duplex stainless steel with the phase-change plasticization effect, and belongs to the technical field of steel alloy materials. The duplex stainless steel comprises components in percentage by mass as follows: more than 0 and less than or equal to 0.06% of C, less than or equal to 0.008% of S, less than or equal to 0.01% of P, 13.0-17.5% of Cr, 5-17% of Mn, 0.1-3.0% of Ni, 0.5-2.5% of Al or Si, 0.001-0.01% of B, 0.005-0.20% of rare earth Ce or Y, and the balance of Fe. A conventional melting process is adopted, rare-earth intermediate alloy is added before casting, which means that Fe-Ce intermediate alloy or Fe-Y intermediate alloy is prepared in advance and then cast and molded after comprehensive material blending and melting, and the duplex stainless steel with the phase-change plasticization effect is finally obtained after hot forging, cold rolling and appropriate solution treatment.

Description

technical field [0001] The invention relates to a duplex stainless steel with phase change plasticizing effect and a preparation method thereof, belonging to the technical field of iron and steel alloy materials. Background technique [0002] Duplex stainless steels consist of austenite and ferrite. The main components of duplex stainless steel are chromium, nickel, and molybdenum. In order to reduce the cost and reduce the content of nickel in the steel, alloying elements such as nitrogen and manganese can be added; and in order to reduce the chromium content in the steel, alloys such as aluminum and silicon can be added. element. With the further continuous growth of domestic stainless steel production capacity and apparent consumption demand, the problems of chromium and molybdenum resources have surfaced and become increasingly prominent. At the same time, there are still contradictions between high strength and poor plasticity in the wide application of economical dup...

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Problems solved by technology

With the further continuous growth of domestic stainless steel production capacity and apparent consumption demand, the problems of chromium and molybdenum resources have surfaced and become increasingly prominent. At the same time, there are still contradictions between high strength and poor plasticity in the wide application of economical duplex stainless steel. Its difficulty in hot processing and low elongation of the thin plate, in this context, in view of the shortcomings of the existing duplex stainless steel, it is very necessary to develop a new generation of chromium resources and molybdenum resource-saving type with phase transformation induced plasticity (TRIP) effect Duplex stainless steel, this type of product has better cold and hot processing performance than the existing duplex stainless steel, and has low cost and excellent corrosion resistance, replacing traditional stainless steel varieties, and is widely used in household appliances, products and solar energy and other fields to further promote Variety structure optimization and technological progress in my country's stainless steel industry, and significantly reduce dependence on precious alloy resources, making due contributions to national resource conservation

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