12Cr2Mo1R steel plate for ultra-thick hydrogen-contacting equipment and production method thereof
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A hydrogen-facing equipment and production method technology, applied in the field of steel, can solve the problems of long production cycle, difficult production, waste of production cost, etc., and achieve the effect of large margin and uniform impact performance
Active Publication Date: 2013-03-06
NANYANG HANYE SPECIAL STEEL CO LTD
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[0002] In the production of Cr-Mo steel, due to its high strength and hardness, special requirements for process equipment, etc., the production is difficult. Especially, when the production thickness is more than 100mm, the blanking method is often used to form the material, the production cycle is long, and the production Serious waste of cost
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[0017] The extra-thickness of the present invention is 100mm-150mm and the performance and flaw detection hydrogen steel 12Cr2Mo1R steel plate contains the following chemical composition in weight percentage (unit, wt%): C: 0.08-0.15, Si: 0.20-0.50, Mn: 0.30 ~0.60, P: ≤0.018, S: ≤0.005, Als: ≤0.020~0.050, Cr: 2.0~2.5, Mo: 0.90~1.10, others are Fe and residual elements.
[0018] The production method adopted in the present invention includes: converter smelting, LF refining, vacuum refining, pouring, heating, rolling, controlled cooling, slow cooling and heat treatment. In the converter smelting, ensure that the tapping carbon is ≥ 0.05%, the tapping P is ≤ 0.015%, and the tapping temperature is ≥ 1650°C; the number of spot blowing should not exceed 2 times to avoid slag during the tapping process; in the LF refining , use a large amount of slag to make slag, and ensure that the white slag retention time is controlled at more than 15min; in the vacuum refining, the holding time...
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Abstract
The invention discloses a 12Cr2Mo1R steel plate for ultra-thick hydrogen-contacting equipment and a production method thereof. The 12Cr2Mo1R steel plate comprises the following chemical components, by mass, 0.08-0.15% of C, 0.20-0.50% of Si, 0.30-0.60% of Mn, equal to or less than 0.018% of P, equal to or less than 0.005% of S, equal to or less than 0.020-0.050% of AlS, 2.0-2.5% of Cr, 0.90-1.10% of Mo, and the balance Fe and residual elements. The production method comprises steps of converter smelting, LF refining, vacuum refining, casting, heating, rolling, controlled cooling, slow cooling, and heat processing. A whole production process from molten iron pretreatment to steel plate heat treatment is executed in strict accordance with above technology, so the object quality performance margin of products is large, wherein the yield margin is 40-80Mpa, the tensile margin is 55-70Mpa, and the elongation margin is 6-9%, thereby the impact performance is uniform and the margin is large.
Description
technical field [0001] The invention relates to steel materials, in particular to an extra-thick 12Cr2Mo1R steel plate for hydrogen-facing equipment and a production method. technical background [0002] In the production of Cr-Mo steel, due to its high strength and hardness, special requirements for process equipment, etc., the production is difficult. In particular, when the production thickness is more than 100mm, the blanking method is often used to form the material, the production cycle is long, and the production The waste of cost is serious. Contents of the invention [0003] The object of the present invention is to provide a 12Cr2Mo1R steel plate for hydrogen equipment with a thickness of 100 mm to 150 m in thickness of 100 mm to 150 m to ensure performance and flaw detection, and a production method thereof. [0004] A hydrogen-facing steel plate 12Cr2Mo1R steel plate, the chemical composition and mass percentage (unit, wt%) are as follows: C: 0.08-0.15, Si: 0....
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