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A 0cr13mn14cun, austenitic technology, applied in the field of nickel-free low-chromium austenitic 0Cr13Mn14CuN stainless acid-resistant steel, can solve the problems of development and application limitations, shortage of nickel elements, and high smelting costs, to eliminate non-metallic inclusions and prevent crystallites. Intermittent corrosion, smelting cost reduction effect
Inactive Publication Date: 2008-08-27
陆平
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The above-mentioned high-nickel-high-chromium stainless and acid-resistant steel is limited in its development and application due to the high smelting cost and the shortage and scarcity of the main raw material nickel element.
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[0009] Nickel-free and low-chromium austenitic 0Cr of the present invention 13 mn 14 The CuN stainless and acid-resistant steel is realized in this way, which will be explained in detail below. Nickel-free low-chromium austenitic 0Cr 13 mn 14 The chemical composition of CuN stainless acid-resistant steel is: C≤0.08%, Si≤1.00%, Mn13.0%~15.0%, Cr12.0%~14.0%, Cu 1.0%~2.0%, N 0.15%~0.25%, P≤0.035%, S≤0.030%.
[0010] Nickel-free and low-chromium austenitic 0Cr of the present invention 13 mn 14 For CuN stainless acid-resistant steel, 1-2% lime is added to the bottom of the furnace before the furnace charge is charged during smelting to facilitate low-temperature dephosphorization at the initial stage of smelting. The reduction process is used to mix red copper, ferrochrome and rust-free low-carbon steel Put the materials into the furnace together, add 1-2% lime and 0.5% fluorite powder after melting, and add ferrochrome nitride preheated to 800 °C at the same time, add mangan...
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Abstract
The invention relates to a nickel-free low-chrome austenite 0Cr13Mn14CuN acid-resistant stainless steel, which is characterized in that the main chemical components comprise C<=0.08%, Si<=1.00%, Mn13.0%-15.0%, Cr12.0%-14.0%, Cu 1.0%-2.0%, N 0.15%-0.25%, P<=0.035% and S<=0.030%. The invention is new steel, which is tested to be austenite metallurgical structure through engineer tests for few decades, and the chemical components, acid resistance, corrosion resistance, oxidation resistance and mechanical property all reach the technical standard of stainless steel, in particular to minor element which is added, and crystal grain is led to be refined, toughness of steel is increased, and the functions of deoxidizing, desulfurizing, eliminating non-metal impurity in steel, preventing intergranular corrosion and the like. The cid-resistant stainless steel utilizes manganese and nitrogen to replace expensive nickel, which leads smelting cost to be lower more than 60%, and can be applied in producing acid-resistant stainless seamless steel pipes, various round bars, sheet material and acid-resistant stainless steel casting which is minutely casted.
Description
technical field [0001] The patent of the invention relates to a nickel-free low-chromium austenitic 0Cr with high intergranular corrosion resistance, good mechanical properties, good low-temperature strength and toughness 13 mn 14 CuN stainless acid-resistant steel. Background technique [0002] Nickel-free and low-chromium austenitic 0Cr of the present invention 13 mn 14 CuN stainless acid-resistant steel is developed for the traditional stainless acid-resistant steel containing high nickel and high chromium alloy components, which is expensive. At present, in the known technology, the typical steel grade in stainless acid-resistant steel is 0Cr 18 Ni 9 Ti and 1Cr 18 Ni 9 Ti, although its performance is good, but the content of nickel and chromium in the composition is high. With the development of science and technology, the scope of use of stainless acid-resistant steel is expanding day by day, from aerospace, aviation, atomic energy, ocean development, energy, che...
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