A kind of large-thickness hydrogen-facing 12cr2mo1r steel plate and its manufacturing method

A technology with large thickness and production method, which is applied in the field of metal materials, can solve the problems that it is not easy to eliminate the original defects of the billet and the general flaw detection performance, and achieve the effects of flexible production organization, stable raw material source, and high yield

Inactive Publication Date: 2016-09-28
JIGANG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the ordinary steel ingot method produces hydrogen-chromium-molybdenum steel extra-thick plates with a thickness greater than 120mm, and the yield is only about 70%. The bonding interface is rough, and the deformation during rolling is not easy to eliminate the original defects of the billet, and the flaw detection performance is average.

Method used

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  • A kind of large-thickness hydrogen-facing 12cr2mo1r steel plate and its manufacturing method
  • A kind of large-thickness hydrogen-facing 12cr2mo1r steel plate and its manufacturing method
  • A kind of large-thickness hydrogen-facing 12cr2mo1r steel plate and its manufacturing method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 100mm12Cr2Mo1R (H) large-thickness hydrogen-prone chromium-molybdenum steel plate is produced by using 200mm thick ordinary continuous casting slab.

[0032] The melting composition of 12Cr2Mo1R (H) (weight percentage): C=0.11%, Si=0.084%, Mn=0.41%, P=0.008%, S=0.002%, Cr=2.31%, Mo=0.96%, As= 0.006%, Sn=0.0043%, Sb=0.0008%, gas content O=0.0020%, N=0.0035%, H=0.0001%, Ceq=0.83%, Pcm=0.31%, the rest is Fe and unavoidable impurities.

[0033] 1) 12Cr2Mo1R(H) is smelted by double slag dephosphorization process, and the continuous casting slab is immediately hung in a slow cooling pit for slow cooling after cutting, and two 200mm thick continuous casting slabs are selected as raw materials; the two raw materials are heated at 55°C / h Speed, heat up to 880°C, keep it warm for 10 hours, then hang it to the casting slab slow cooling pit to cool to room temperature.

[0034] 2) Mill the two raw materials to make them smooth, grind the longitudinal edge of each billet to a width...

Embodiment 2

[0045] 200mm12Cr2Mo1R (H) large thickness hydrogen 12Cr2Mo1R steel plate is produced by using 300mm thick ordinary continuous casting slab.

[0046] The melting composition of 12Cr2Mo1R (H) (weight percentage): C=0.11%, Si=0.10%, Mn=0.55%, P=0.010%, S=0.0019%, Cr=2.26%, Mo=0.97%, As= 0.008%, Sn=0.0046%, Sb=0.0006%, gas content O=0.0019%, N=0.0033%, H=0.0001%, Ceq=0.85%, Pcm=0.32%, the rest is Fe and unavoidable impurities.

[0047] 1) 12Cr2Mo1R(H) was smelted by double slag dephosphorization process, and the continuous casting slab was hoisted into the slow cooling pit for slow cooling treatment immediately after cutting, and two 300mm thick continuous casting slabs were selected as raw materials.

[0048] 2) Raise the temperature of the two raw materials to 880°C at a heating rate of 58°C / h, keep them warm for 10.5 hours, and then hang them to the casting slab slow cooling pit to cool to room temperature.

[0049] 3) Mill the two raw materials to make them smooth, grind the ...

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Abstract

The invention belongs to the field of metal materials, and specifically relates to a large-thickness hydrogen-facing 12Cr2Mo1R steel plate and a manufacturing method thereof. %, P≤0.010%, S≤0.010%, Cr: 2.0‑2.50%, Mo: 0.90‑1.10%, Sb≤0.003%, Sn≤0.010%, As≤0.010%, O≤0.002%, N≤0.004% , H≤0.0002%, and the rest are Fe and unavoidable impurities. The beneficial effects of the present invention are: the present invention breaks through the limitations of the carbon equivalent of steel grades in the technology of vacuum welding of continuous casting slabs for composite laminated extra-thick steel plates, and overcomes the limitations of welding The bottleneck of the vacuum electron beam welding process of hydrogen chromium molybdenum steel due to poor performance and harsh welding conditions, without traditional preheating before welding, the technology for preparing large thickness billets with hydrogen chromium molybdenum steel double blanks and multiple blanks was developed. 80‑200mm thick hydrogen-prone chromium-molybdenum steel plate; using this invention to produce hydrogen-prone chromium-molybdenum steel plate, the electricity consumption is about 20kWh / t, and the water consumption is 3m 3 / t or so, the yield of the steel plate produced is about 88%, and no dust is generated.

Description

technical field [0001] The invention belongs to the field of metal materials, and in particular relates to a large-thickness hydrogen-facing 12Cr2Mo1R steel plate and a manufacturing method thereof. Background technique [0002] Refining and chemical industry equipment (including hydrogenation reactors, four-in-one continuous reforming reactors, screw-type heat exchangers, hot high-pressure separators, etc.) H) is represented by hydrogen-prone chromium-molybdenum steel. This material requires high temperature resistance, high pressure resistance, hydrogen-induced crack resistance, and temper embrittlement resistance. The thickness requirements of the steel plate are also getting higher and higher. According to rough statistics, the hydrogen chromium molybdenum steel plate with a thickness of 80-200mm occupies more than 80% of the market share. [0003] The thickness of continuous casting slabs produced by major steel mills is usually about 300mm. Due to the limitation of co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/22C21D8/02
Inventor 肖丰强孙卫华赵乾王金华孙风晓崔健王绍禄乔松刘晓东蒋善玉李敏唐国红楚世豪胡淑娥张宏林
Owner JIGANG GRP
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