Large-thickness Cr-Mo system 12Cr2Mo1R container steel and production method thereof
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A 12cr2mo1r, production method technology, applied in the direction of temperature control, rolling force/roll gap control, etc., can solve the problems of long purchase cycle, low market supply, high price, etc., and achieve good high temperature tensile properties, good plastic toughness Energy, high temperature performance good effect
Active Publication Date: 2011-06-01
NANYANG HANYE SPECIAL STEEL CO LTD
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[0002] 12Cr2Mo1R is used in petrochemical, nuclear power, steam turbine cylinder, thermal power and other high-temperature and high-pressure large-scale equipment that is connected with hydrogen or hydrogen mixed media. Now there are very few manufacturers that can produce extra-thick specifications of 12Cr2Mo1R. In addition, 120mm in the domestic market The 12Cr2Mo1R steel grades with the above specifications, because the manufacturer cannot guarantee the flaw detection and performance, the market supply is very small. If you rely on imports, not only the price is expensive, but also the purchase cycle is long, and the normal operation of the project cannot be guaranteed.
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Embodiment 1
[0016] Example 1: A large-thickness Cr-Mo-based 12Cr2Mo1R container steel, comprising the following chemical components in mass percentage (unit, wt%): C: 0.11, Si: 0.45, Mn: 0.35, P: 0.017, S: 0.004, Cr: 2.00, Mo 1.10AlS: 0.040, others are Fe and residual elements;
Embodiment 2
[0018] A large-thickness Cr-Mo system 12Cr2Mo1R container steel, comprising the following chemical components in mass percent (unit, wt%): C: 0.14, Si: 0.25, Mn: 0.55, P: 0.010, S: 0.010, Cr: 2.50, Mo 0.90, AlS: 0.020, others are Fe and residual elements;
Embodiment 3
[0020] A large-thickness Cr-Mo series 12Cr2Mo1R container steel, comprising the following chemical components in mass percent (unit, wt%): C: 0.12, Si: 0.35, Mn: 0.45, P: 0.013, S: 0.007, Cr: 2.20, Mo 1.00, AlS: 0.030, others are Fe and residual elements;
[0021] For the above-mentioned large-thickness Cr-Mo-based 12Cr2Mo1R container steel, the thickness of the steel plate is 120-150mm.
[0022] In order to achieve the above purpose, during the smelting process, harmful elements such as P (phosphorus) and S (sulfur) in steel are strictly controlled to ensure that the purity of molten steel basically reaches the level of clean steel. In the subsequent rolling and heating process, increase the final rolling temperature to prevent cracks caused by excessive internal stress of the steel plate and improve its plastic deformation. After the steel plate is rolled, it is stacked and slowly cooled to eliminate the internal stress of the steel plate, and then quenched and tempered to ...
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Abstract
The invention discloses large-thickness Cr-Mo system 12Cr2Mo1R container steel and a production method thereof. Under the process sequences of high quality molten iron and KR molten iron pretreatment, 100 ton top and bottom combined blown converter, argon-blowing treatment, low frequency (LF) furnace refinement, die casting pouring, walking beak reheating furnace, 3800-meter rolling mill, activated calcium carbonate (ACC) laminar flow cooling, 11 roller hot strainghtener, stack cooling, tempering, finishing, outer detecting, fault detecting and warehousing, various property indexes of the container steel are ensured through tempering, thereby meeting the idea demands of users. In the production method, fine grain elements such as Nb, V, Ti and the like are not added; and the large-thickness container steel is produced by virtue of a low carbon equivalent design, a controlled rolling and controlled cooling process and a tempering production process, is a 12Cr2Mo1R steel plate with the thickness of 120-150 millimeters, maintains Maddox position direction of sorbite steel, and has the advantages of good ductility and toughness and favorable high-temperature tensile property.
Description
technical field [0001] The invention relates to the technical field of extra-thick steel plate production, in particular to a large-thickness Cr-Mo series 12Cr2Mo1R container steel and a production method thereof. Background technique [0002] 12Cr2Mo1R is used in petrochemical, nuclear power, steam turbine cylinder, thermal power and other high-temperature and high-pressure large-scale equipment that is connected with hydrogen or hydrogen mixed media. Now there are very few manufacturers that can produce extra-thick specifications of 12Cr2Mo1R. In addition, 120mm in the domestic market The 12Cr2Mo1R steel grades of the above specifications have very little supply in the market because the manufacturers cannot guarantee flaw detection and performance. If you rely on imports, not only the price is expensive, but also the purchase cycle is long, which cannot guarantee the normal operation of the project. Accelerating structural adjustment, coping with the adverse effects of th...
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