09MnNiDR ultra-thick low temperature container plate and production method thereof

A low-temperature container and production method technology, applied in the field of iron and steel industry, can solve the problems of low productivity, center porosity and segregation defects, low operating rate, etc., achieve high lamellar tear resistance, uniform and fine grains, and improve impact toughness Effect

Inactive Publication Date: 2015-03-25
SHANDONG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technical effect described by this patents relates to improving the properties of high-strength cold containers used throughout industry such as building construction materials like concrete. These improvements include increased durability against damage caused from external factors like falling objects on their surfaces, reduced weight without sacrificing structural integrity, enhanced impact absorption capabilities when dropped onto them, better thermal conductivity compared to traditional methods involving laminated layers, lower environmental concerns associated with manufacturing processes, etc., resulting in longer lifespan cycles over time.

Problems solved by technology

This patented technical problem addressed by this patents relates to improving the efficiency and effectiveness of producing thin gauge metal products like presses without sacrificial layers on their surfaces during the roll forming processes due to poor compressibility properties caused by insoluble iron oxides formed when molten metals react together under specific conditions. These flaws may affect the overall strength and durability of the final product made up of multiple components.

Method used

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  • 09MnNiDR ultra-thick low temperature container plate and production method thereof
  • 09MnNiDR ultra-thick low temperature container plate and production method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] The 09MnNiDR ultra-thick cryogenic container steel in this example is prepared from the following components in mass percentage: C: 0.10%, Si: 0.31%, Mn: 1.45%, P: 0.010%, S: 0.003%, Nb: 0.030%, Ni: 0.52%, Ti: 0.019%, Alt: 0.029%, and the rest are Fe and unavoidable impurities.

[0029] The production preparation method of the 09MnNiDR extra thick pressure vessel steel of the present embodiment is as follows:

[0030] 1) Smelting process: After the raw material molten iron is pretreated by KR, it is smelted in a 120t top-bottom combined blowing converter. After the converter is tapped, the ladle is blown with argon for 12 minutes and fed to the aluminum wire for deoxidation treatment. The molten steel is sent to the LF refining furnace for refining, and the temperature and composition are adjusted After the fine-tuning treatment, vacuum treatment in the VD furnace, the vacuum time is 17 minutes, after the treatment, the calcium iron wire is fed at 2m / t, and the argon is...

Embodiment 2

[0038] The production and preparation method of the 09MnNiDR extra-thick cryogenic vessel steel in this example is the same as in Example 1, the difference is that the steel is prepared from the following mass percentage components: C: 0.09%, Si: 0.35%, Mn: 1.43%, P: 0.012%, S: 0.002%, Nb: 0.028%, Ni: 0.50%, Ti: 0.022%, Alt: 0.035%, and the rest is Fe and unavoidable impurities. The smelting adopts 210t top-bottom combined blowing converter smelting. After the converter is tapped, the ladle is blown with argon for 10 minutes. The molten steel is vacuum treated in the RH furnace and the vacuum is kept for 15 minutes. Blowing argon for 20 minutes, the diameter of the liquid surface of the ladle is about 120mm; after the RH furnace treatment, the slab continuous casting machine with a section of 250mm×2200mm is poured on the molten steel. The range fluctuates at 25°C, the casting speed is maintained at 0.90m / min, the thickness of the raw billet is 490mm after compounding two 250m...

Embodiment 3

[0041] The production and preparation method of the 09MnNiDR extra-thick low-temperature container steel in this embodiment is the same as that in Embodiment 1, the difference is that the weld width after spot welding of two continuous casting slabs is 0.1-0.35 mm, the thickness of the raw material slab after compounding is 525 mm, and the composite slab The heating time in the heating furnace is 18 hours, the thickness of the intermediate billet is 185mm, the finish rolling temperature is 865°C, the finished steel plate specification is 105mm, the compression ratio is 5 times, the normalizing temperature is 915°C, and the furnace time is 180 minute.

[0042] Mechanical property tests were performed on the 09MnNiDR steel plates for cryogenic vessels prepared in Examples 1 to 3 above, as shown in Tables 1, 2, and 3.

[0043]

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Abstract

The invention belongs to the field of iron and steel industry, and specifically relates to a 09MnNiDR ultra-thick low temperature container plate and a production method thereof. The 09MnNiDR ultra-thick low temperature container plate comprises the following components in percentage by mass: 0.08-0.12% of C, 0.20-0.45% of Si, 1.40-1.60% of Mn, less than or equal to 0.018% of P, less than or equal to 0.005% of S, 0.025-0.040% of Nb, 0.40-0.55% of Ni, 0.008-0.025% of Ti, 0.020-0.050% of Alt and the balance of Fe and inevitable impurities. A composite ultra-thick plate blank is prepared from a common medium-thickness continuous casting plate blank through a vacuum electron beam welding technology, so that the requirement that the standard compression ratio of a blank is not less than 3 is skillfully met; and the blank manufacturing mode is low in investment, pollution-free, low in energy consumption, flexible and convenient. Various properties of the prepared steel plate completely meet the requirements of GB3531-2014.

Description

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Claims

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Application Information

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Owner SHANDONG IRON & STEEL CO LTD
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