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METHOD FOR PRODUCTION OF 13CR TYPE MARTENSITIC STAINLESS STEEL SEAMLESS PIPES

机译：生产13Cr型马氏体不锈钢无缝管的方法

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FIELD: metallurgy.;SUBSTANCE: invention relates to the field of metallurgy and can be used in the manufacture of seamless pipes from high-alloy stainless steel of the martensitic class of 13Cr type, used in the fields for the production of oil and gas with a high concentration of carbon dioxide, including in cold climatic conditions. Method for production of seamless pipes from a high-alloy stainless steel billet of the martensitic class of the 13Cr type with a chromium content of 10÷15% includes helical rolling of the billet into a sleeve and deformation of the sleeve on a retained mandrel in a rolling mill. The pipes are rolled out on the retained mandrel at the speed of the mandrel movement in accordance with a mathematical expression. After rolling, pipes are heated for austenitization to a temperature of 900÷980°C, cooling at a rate of at least 00,2°C/sec, at least one subsequent high tempering at a heating temperature of 550÷720°C and cooling in calm air.;EFFECT: invention ensures optimal matching of the speeds of the mandrel and pipe during rolling and improves the quality of pipes by ensuring the required level of strength and viscoplastic characteristics.;3 cl
机译：领域：冶金。;物质：发明涉及冶金领域，可用于制造来自马氏体类的13Cr型高合金不锈钢的无缝管，用于生产石油和气体的领域高浓度的二氧化碳，包括在寒冷的气候条件下。从13Cr型马氏体类别的高合金不锈钢坯料生产无缝管的方法，其中铬含量为10‰15％，包括坯料滚动坯料到保留的心轴上的套筒中的套筒和变形轧机。根据数学表达，在心轴运动的速度下在保留的心轴上翻滚管道。轧制后，将管子加热至奥氏体化至900℃980℃的温度，以至少00,2℃/秒的速率冷却，在加热温度为550℃和720℃下的至少一个后续高回火。在平静的空气中冷却。;效果：通过确保所需的强度和粘性特性，发明确保了在轧制过程中的速度和管道速度的最佳匹配。; 3 cl

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