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Duplex stainless steel containing high content of nitrogen; with high resistance to corrosion and good structural stability, its use;
Duplex stainless steel containing high content of nitrogen; with high resistance to corrosion and good structural stability, its use;
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机译:含氮量高的双相不锈钢;具有很高的耐腐蚀性和良好的结构稳定性,其用途;
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摘要
According to the invention there is a high nitrogen containing duplex stainless steel with high corrosion resistance and good structure stability. Characteristic is the analysis of the alloy being in % by weight max 0.05% C, 23-27% Cr, 5.5-9.0% Ni, 0.25-0.40% N, max 0.8% Si, max 1.2% Mn, 3.5-4.9% Mo, max 0.5% Cu, max 0.5% W, max 0.010% S, max 0.5% V, max 0.18% Ce and Fe and normally present impurities, at which the contents of the alloying elements are so adjusted that the ferrite content after solution heat treatment at about 1075 DEG C. amounts to 30-55%. The analysis of the steel is so optimized that it in solution heat treated, cold worked and also welded condition is particularly suitable for use in such environments where the presence of chloride ions gives rise to a high corrosivity.
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