Fire-resistant corrosion-resistant anti-seismic construction steel with yield strength of 460MPa and production method
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A yield strength, construction steel technology, applied in the field of seismic construction steel, can solve the problems of high Cu content and non-compliance, and achieve the effects of excellent performance, low cost and excellent seismic requirements
Active Publication Date: 2014-06-18
武汉钢铁有限公司
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This document refers to the high content of Cu in the chemical composition of the steel, which does not meet the requirements of GB / T 19879 "Steel Plates for Building Structures" with Cu≤0.30%, and does not have fire and corrosion resistance at the same time
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[0032] The present invention is further described below:
[0033] Table 1 is a list of chemical components and weight percentages of each embodiment of the present invention and comparative examples;
[0034] Table 2 is the value list of the main process parameters of each embodiment of the present invention and comparative examples;
[0035] Table 3 is a list of test results of mechanics, fire resistance and corrosion resistance of each embodiment of the present invention and comparative examples.
[0036] Each embodiment of the present invention is produced according to the following process steps:
[0037] 1) Carry out desulfurization of molten iron, and control S in molten iron to ≤0.001%;
[0038] 2) Carry out converter smelting, and control the C in molten steel: 0.095~0.180%, P≤0.008%;
[0039] 3) Vacuum treatment in the RH furnace: the total time of vacuum treatment is not less than 16 minutes; when the vacuum treatment reaches 6 minutes, Sn is added at one time, an...
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Abstract
The invention discloses fire-resistant corrosion-resistant anti-seismic construction steel with yield strength of 460MPa. The steel comprises the following components in percentage by weight: 0.095-0.180% of C, 0.28-0.55% of Si, 1.40-1.60% of Mn, less than or equal to 0.008% of P, less than or equal to 0.002% of S, 0.014-0.045% of Nb, 0.004-0.030% of Ti, 0.034-0.044% of V, 0.09-0.29% of Mo, 0.06-0.12% of W, 0.0080-0.0100% of Mg, 0.08-0.13% of Sn and less than or equal to 0.0016% of O. The steel is prepared through processes, including molten iron desulphurization, smelting in a converter, vacuum treatment, casting blank heating, sectional rolling, cooling and stand-by. On premise that the use properties of the steel meet the requirements of GB / T19879 Steel Plates for Building Structure, the yield strength is no less than 460MPa, the yield ratio is less than or equal to 0.80, the fire resistance is that the yield strength is no less than 2 / 3 at the room temperature, the corrosion resistance complete immersion corrosion rate is not greater than 0.45g / m<2>.h, meanwhile the requirements on fire resistance, corrosion resistance and seismic resistance are met, and the properties are excellent.
Description
technical field [0001] The invention relates to an anti-seismic construction steel and a production method thereof, in particular to a refractory, corrosion-resistant, anti-seismic construction steel with a yield strength of 460 MPa and a production method thereof. Background technique [0002] The rapid development of high-rise steel structure buildings has put forward new requirements for steel plates used to make structural parts such as columns and beams in terms of strength, fire resistance, corrosion resistance, and earthquake resistance. [0003] On the one hand, the use of high-strength steel can improve the strength level of structural steel, avoid quality problems in subsequent processing and welding due to excessive thickness of steel, and can also reduce structural weight, construction costs, and steel waste. Improve the reliability of the structure. [0004] On the other hand, the use of high-temperature-resistant, fire-resistant, and earthquake-resistant steel...
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