Superlarge thickness hydrogen chromium molybdenum steel plate for hydrogenation equipment and manufacture method thereof

Abstract

The invention relates to a superlarge thickness hydrogen chromium molybdenum steel plate for hydrogenation equipment and a manufacture method thereof, and belongs to the technical field of ferrous metallurgy. A technical scheme is as below: the steel plate comprises the following components by weight: no more than 0.15% of C, no more than 0.10% of Si, 0.300.60% of Mn, no more than 0.007% of P, no more than 0.005% of S, 2.00-2.50% Cr, 0.90-1.10% of Mo, no more than 0.02% of Nb, no more than 0.20% of Cu, no more than 0.20% of Ni, no more than 0.003% of Sb, no more than 0.005% of Sn, no more than 0.016% of As, no more than 0.003% of O, N no more than 0.008%, no more than 0.0002% of H, no more than 0.03 of Ti and the balance of Fe and unavoidable impurities; a round steel ingot with piece weight of 80 tons is produced by electric arc furnace smelting and casting; and the steel ingot is subjected to forging cogging, rolling and a heat treatment process including normalizing, accelerated cooling and tempering to prepare the superlarge thickness chromium molybdenum steel plate with a maximum thickness of 256mm for hydrogenation equipment. A finished steel plate has maximum single weight reaching 60 tons, good cold bending property, no cracking during material manufacture and good resilience. The method provided by the invention reduces labor intensity, saves time and improves the utilization rate of materials.

Description

technical field [0001] The invention relates to a super-thick hydrogen-facing chromium-molybdenum steel plate for hydrogenation equipment and a production method thereof, belonging to the technical field of iron and steel metallurgy. Background technique [0002] In recent years, the development of the petrochemical industry mainly revolves around the secondary deep processing of oil products and the large-scale installation, marked by the application of hydrogenation technology. Hydrogenation technology is an advanced process for secondary deep processing to improve oil quality and change oil structure, and it is a symbol to measure a country's oil refining technology level and comprehensive national strength. In order to shorten the gap between my country's petrochemical industry and foreign advanced levels, in July 1983, the State Council Guofa [1983] No. 110 issued the "Decision on Developing Major Technical Equipment". In 1986, the National Major Technical Equipment Et...

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Problems solved by technology

At present, the background technology generally can only produce steel plates for hydrogenation equipment with a thickness of less than 100mm. When the thickness of the steel plate develops in the direction of large thickness, it often encounters the problem of performance degradation in various aspects. If the existing composition ratio and If the thickness of the steel plate is directly increased on the basis of the production method, the obtained large-thickness steel plate cannot meet the performance parameters set by the national standard GB713-2008

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