Normalized steel plate for wind power, and production method thereof
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A production method and steel plate technology, applied in the field of steel materials, can solve the problems of poor low-temperature performance, high cost, and low yield strength, and achieve the effects of enhanced low-temperature performance, reduced alloy cost, and high yield strength
Inactive Publication Date: 2015-07-15
武汉钢铁有限公司
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[0009] This application provides a normalized steel plate for wind power and its production method, which solves the technical problems of high cost, poor low temperature performance and low yield strength of steel alloys for wind power in the prior art
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[0039] In order to better understand the above-mentioned technical solution, the above-mentioned technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0040] The present application provides a normalized steel plate for wind power, which can be widely used in wind power equipment. The yield strength of the steel plate is ≥370MPa, the tensile strength is 500-650MPa, the elongation A is ≥30%, the impact energy value at -40°C is greater than or equal to 250J, and the impact energy value at -60°C is greater than or equal to 200J.
[0041] The mass percentage of the steel plate specifically includes: C (carbon): 0.12-0.18%; Si (silicon): 0.21-0.32%; Mn (manganese): 1.10-1.65%; P (phosphorus): ≤0.015%; ): ≤0.008%; Nb (niobium): 0.015-0.040%; Ti (titanium): 0.015-0.03%; Als (acid-soluble aluminum): 0.025-0.06%; N (nitrogen): 0.004-0.010%, the rest is Fe and unavoidable impurities.
[0042] And, 61≤203...
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Abstract
The invention discloses a normalized steel plate for wind power, and a production method thereof. The yield strength, the tensile strength, the elongation percentage A, the -40DEG C impact energy and the -60DEG C impact energy of the normalized steel plate for wind power are not lower than 370MPa, 500-650MPa, not lower than 30%, not lower than 250J and not lower than 200J respectively. The steel plate comprises, by mass, 0.12-0.18% of C, 0.21-0.32% of Si, 1.10-1.65% of Mn, 0.015% or less of P, 0.008% or less of S, 0.015-0.040% of Nb, 0.015-0.03% of Ti, 0.025-0.06% of Als, 0.004-0.010% of N, and the balance of Fe and inevitable impurities; and 203*C<1 / 2>-44.7*Si is not lower than 61 and not greater than 72, and Ti / (C / 100+N) is in a range of 2.47-2.69 or 2.88-2.90. Nb and Ti alloy is used in the steel plate, so alloy cost of the steel plate is reduced, the low temperature performances of the steel plate are enhanced, the yield strength is high, and the technical problems of high alloy cost, poor low temperature performances and small normalized yield strength of steel plates for wind power in the prior art are solved.
Description
technical field [0001] The invention relates to the technical field of steel materials, in particular to a normalized steel plate for wind power and a production method thereof. Background technique [0002] Wind energy is a renewable, non-polluting, green and clean energy with abundant reserves. About 2% of the Earth's solar energy is converted into wind energy. my country is rich in wind energy resources, with a total wind energy reserve of 3.226 billion kilowatts, and the actual total amount of wind energy that can be developed on land is about 250 million kilowatts, ranking first in the world. With the increasing frequency of smog and haze, the government pays more and more attention to environmental protection, and the clean energy represented by wind power has huge room for development. [0003] The main equipment of wind power generation consists of a nacelle, rotor blades, shaft, low-speed shaft, gearbox, generator, yaw device, electronic control device and tower (...
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