High-performance weather-resisting anti-seismic steel for building and production method thereof

A high-performance technology for construction steel, applied in the field of low-alloy steel and its production, can solve the problems of not considering steel seismic resistance, complex production process, increased cost, etc., to achieve short production cycle, low steel cost, good weather resistance performance effect

Inactive Publication Date: 2009-08-05
WUHAN IRON & STEEL (GROUP) CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Before the present invention, there were many reports about weathering steel grades used in construction, such as European patent (EP 0841 409 A1), former Soviet patent (SU1822446A3), Japanese patent (Japanese patent application 9-277083), Bethlehem Iron and Steel Company and Pu A patent (US6187117) for the manufacturing method of an improved weather-resistant steel plate containing C

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035] Example 1

[0036] A high-performance weather-resistant and earthquake-resistant construction steel with a rolled steel plate thickness of 50 mm. The chemical composition and weight percentage of the steel are: C 0.05, Si 0.15, Mn 1.0, P: 0.015, S: 0.009, Cu 0.15, Cr 0.40, Ni 0.25, V 0.01, Ti 0.005, Ca 0.006 and the rest are Fe and unavoidable impurities.

[0037] The area percentage of ferrite in the steel is 50%.

[0038] A method for producing the high-performance weather-resistant and seismic-resistant construction steel according to claim 1, wherein the steps are as follows:

[0039] 1) Adopt hot metal desulfurization and RH vacuum degassing treatment;

[0040] 2) Heat the slab to 1150°C to fully austenitize the slab;

[0041] 3) Perform rough rolling on the slab, and control the start-rolling temperature at 1100°C;

[0042] 4) Finish rolling of the slab: the finish rolling start-up temperature is controlled at 880℃; the reduction rate of each pass is controlled at 15%...

Example Embodiment

[0044] Example 2

[0045] The chemical composition and weight percentage of a rolled steel plate with a thickness of 45 mm for high-performance weather-resistant and seismic-resistant construction steel: C 0.08, Si 0.10, Mn 0.60, P 0.013, S 0.009, Cu 0.25, Cr 0.25, Ni 0.10, V 0.045, Ti 0.009, Nb 0.010, Als 0.020, RE 0.0015, and the rest are Fe and unavoidable impurities.

[0046] The area percentage of ferrite in the steel is 60%.

[0047] A method for producing the high-performance weather-resistant and seismic-resistant construction steel according to claim 1, wherein the steps are as follows:

[0048] a) Using molten iron desulfurization and RH vacuum degassing treatment;

[0049] b) Heat the slab to 1200°C to fully austenitize the slab;

[0050] c) Carry out rough rolling of the slab, and control the start rolling temperature at 1130℃;

[0051] d) Finish rolling of the slab: the finish rolling start temperature is controlled at 900℃; the reduction rate of each pass is controll...

Example Embodiment

[0053] Example 3

[0054] The chemical composition and weight percentage of a rolled steel plate with a thickness of 40 mm for high-performance weathering and earthquake-resistant construction steel: C 0.12, Si 0.25, Mn 1.50, P 0.009, S 0.005, Cu 0.34, Cr 0.50, Ni 0.32 V 0.10, Ti 0.010, Nb 0.025, Als 0.050, Ca 0.0010, RE 0.0010, and the rest are Fe and unavoidable impurities.

[0055] The area percentage of ferrite in the steel is 63%.

[0056] A method for producing the high-performance weather-resistant and seismic-resistant construction steel according to claim 1, wherein the steps are as follows:

[0057] 1) Adopt hot metal desulfurization and RH vacuum degassing treatment;

[0058] 2) Heat the slab to 1250°C to fully austenitize the slab;

[0059] 3) Carry out rough rolling of the slab, and control the start rolling temperature at 1150℃;

[0060] 4) Finish rolling of the slab: the finish rolling temperature is controlled at 920℃; the reduction rate of each pass is controlled ...

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PUM

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Abstract

The invention relates to low alloyed steel used for building and a production method thereof, aiming at solving the defects that the prior building steel has atmospheric corrosion resisting property and does not consider the shock resistance problem. The invention adopts the measures that the low alloyed steel contains components by weight of 0.05-0.16 percent of C, 0.10-0.50 percent of Si, 0.60-1.50 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.010 percent of S, 0.15-0.60 percent of Cu, 0.25-0.80 percent of Cr, 0.10-0.50 percent of Ni, 0.01-0.10 percent of V, 0.005-0.030 percent of Ti at least one component of 0.010-0.040 percent of Nb, 0.010-0.050 percent of Als, 0.0010-0.0060 percent of Ca and 0.0010-0.020 percent of RE, and the rest of Fe and unavoidable impurities; and the production method comprises the following steps of molten iron desulphurizing and RH degassing, heating to 1150-1310 DEG C, rough rolling with the temperature being controlled at 1100-1200 DEG C and finishing rolling, wherein the beginning temperature of the finishing rolling is 880-980 DEG C, the rolling reduction ratio of each step is 15-30 percent, the final temperature of the finishing rolling is 800-900 DEG C, and the accumulated rolling reduction ratio of three steps of 35-50 DEG C.

Description

technical field [0001] The invention relates to steel for construction and a production method thereof, in particular to low-alloy steel with high performance weather resistance and earthquake resistance suitable for construction and a production method thereof. Background technique [0002] Before the present invention, there were many reports about weathering steel grades used in construction, such as European patent (EP 0841 409 A1), former Soviet patent (SU1822446A3), Japanese patent (Japanese patent application 9-277083), Bethlehem Iron and Steel Company and Pu A patent (US6187117) for the manufacturing method of an improved weather-resistant steel plate containing C, Mn, Nb, V, N, and Ti applied by General Iron and Steel Co., Ltd., which is mainly a steel grade resistant to atmospheric corrosion, and its main The atmospheric corrosion resistance of steel is improved by adding P, Cu, Cr and other elements, and some elements such as As and Co are added, which not only in...

Claims

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Application Information

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IPC IPC(8): C22C38/50C22C33/04C21C1/02C21C7/10C21C7/072C21D8/02
Inventor 童明伟卜勇段东明张开广黄成红杜明习天辉董汉雄
Owner WUHAN IRON & STEEL (GROUP) CORP
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