Atmospheric corrosion resistant steel for high-strength container and manufacturing method for atmospheric corrosion resistant steel

A technology of atmospheric corrosion-resistant steel and its manufacturing method, which is applied in the field of atmospheric corrosion-resistant steel for high-strength containers and its manufacturing, can solve the problems of increasing manufacturing costs, unfavorable steel plate welding performance and low-temperature impact performance, etc., to achieve increased load-bearing capacity, Excellent comprehensive mechanical properties, the effect of strength improvement

Active Publication Date: 2017-01-04
BAOSTEEL ZHANJIANG IRON & STEEL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent adopts Cu-Cr-Ni weather resistance composition design and Nb-Ti-Mo micro-alloy design, and the invention patent specially adds V element 0.06-0.14%. These alloy elements not only greatly increase the manufacturi

Method used

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  • Atmospheric corrosion resistant steel for high-strength container and manufacturing method for atmospheric corrosion resistant steel
  • Atmospheric corrosion resistant steel for high-strength container and manufacturing method for atmospheric corrosion resistant steel
  • Atmospheric corrosion resistant steel for high-strength container and manufacturing method for atmospheric corrosion resistant steel

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Embodiment 1

[0049] According to the chemical composition requirements of the steel of the present invention, smelting is carried out in a converter, and then post-furnace refining is carried out to obtain the chemical composition shown in Table 1. The continuous casting billets are sent to the hot rolling production line. The billet heating temperature is 1260 ° C. Two-stage controlled rolling and water cooling after rolling And coiling, the final rolling temperature is 830℃~880℃, and the coiling temperature is 580℃~660℃.

[0050] The mechanical properties of the steel examples of the present invention are shown in Table 1. The chemical composition, mechanical properties, etc. were compared with similar steel types. Among them, the comparison patent 1 is the Chinese patent number ZL200410061112.4, and the comparison patent 2 is the Chinese patent number ZL200510111858.6. Comparative patent 3 is US patent US6056833.

[0051] Table 1 Steel of the present invention and comparison of chemica...

Embodiment 2

[0058] According to the composition requirements of the present invention, the steel of the present invention is smelted on a 500kg vacuum induction furnace in a laboratory. The chemical composition is shown in Table 2, and the manufacturing process is shown in Table 3.

[0059] The billet heating temperature is 1260°C, the final rolling temperature is 830-880°C, accelerated cooling to 580°C-660°C for coiling after rolling, and then air-cooled to room temperature.

[0060] The mechanical properties of the steel of the present invention are shown in Table 4.

[0061] Table 2 steel embodiment of the present invention - chemical composition (wt%)

[0062] Example C Si mn P S Al Cu Cr Ti Ca N 1 0.030 0.32 0.54 0.008 0.004 0.037 0.35 0.60 0.06 0.0021 0.0045 2 0.031 0.39 0.80 0.009 0.003 0.035 0.31 0.90 0.12 0.0038 0.0044 3 0.047 0.32 0.61 0.010 0.003 0.036 0.32 0.49 0.09 0.0029 0.0051 4 0.066 0.30 0.49 0...

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Abstract

The invention discloses atmospheric corrosion resistant steel for a high-strength container and a manufacturing method for the atmospheric corrosion resistant steel. The atmospheric corrosion resistant steel consists of the following components in percentage by weight: 0.03-0.10% of C, 0.30-0.60% of Si, 0.40-0.80% of Mn, less than or equal to 0.015% of P, less than or equal to 0.006% of S, less than or equal to 0.05% of Al, 0.20-0.4% of Cu, 0.40-0.90% of Cr, 0.06-0.12% of Ti, 0.001-0.006% of Ca, less than or equal to 0.006% of N, and the balance Fe and inevitable impurity elements. Based on relatively low C-Mn steel component content, weather-resistant elements Cu and Cr and micro alloy strengthening element Ti are added and compounded, and controlled rolling and cooling processes are adopted for producing, so that a steel plate has fine ferrite and a little bainite structure, and has yield strength index of 450-550MPa or higher.

Description

technical field [0001] The invention relates to high-strength atmospheric corrosion-resistant steel and a production method thereof, in particular to a high-strength atmospheric corrosion-resistant steel for containers and a production method thereof. Background technique [0002] Weathering steel for containers belongs to atmospheric corrosion-resistant steel, such as the atmospheric corrosion-resistant low-alloy structural steel disclosed in Japanese Patent No. JP04235250A, Chinese Patent No. 00121262.1, and Chinese Patent No. 00133579.0. These patented steel grades are all low-alloy structural steels with certain atmospheric corrosion resistance, and the composition system is Cu-P-Cr-Ni or Cr-P-Ti-RE. [0003] In order to further prolong the service life of materials, some weather-resistant steels with high corrosion resistance have been developed in recent years, such as Japanese Patent No. JP10025550A, JP2002363704, Chinese Patent No. CN101376953A, etc. This type of pa...

Claims

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Application Information

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IPC IPC(8): C22C38/28C21D8/02
Inventor 杨阿娜李自刚陆敏何晓明温东辉
Owner BAOSTEEL ZHANJIANG IRON & STEEL CO LTD
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