Economical type duplex stainless steel with phase change plastification effect

Abstract

The invention relates to an economic type duplex stainless steel with a phase change plastification effect, belonging to the technical field of steel and iron alloy materials. The economical type duplex stainless steel comprises the following components in percentage by weight: not more than 0.03 percent of C, not more than 0.03 percent of S, not more than 0.03 percent of P, 19.0-21.0 percent of Cr, 8-12 percent of Mn, 0.1-0.5 percent of Ni, 0.15-0.35 percent of N, not more than 1.0 percent of Si, 0.001-0.01 percent of B, 0.005-0.20 percent of rare earth Ce or Y and the balance of Fe. A conventional melting process method is adopted and comprehensive ingredients are melted, are poured and formed, and are subjected to solution treatment, thus obtaining the economical type duplex stainless steel with quite good phase change plastification effect and elongation.

Description

technical field [0001] The invention relates to a duplex stainless steel with a particularly good elongation rate of the phase transformation plasticizing effect, which belongs 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. 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 thermal processing and low elongation of the thin plate,...

AI Technical Summary

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 thermal 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 resource-saving stainless steel with a particularly good elongation of the 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