Low-density and high-strength steel for automobiles and preparation method thereof
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A low-density, high-strength steel technology, applied in the field of high-strength light steel, can solve the problem that the steel plate cannot meet the requirements of lightness, ductility and lightweight at the same time, and achieve high strength, high elongation, and reduce the weight of the car.
Active Publication Date: 2020-04-10
SHOUGANG CORPORATION
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[0003] The purpose of the present invention is to provide a low-density high-strength steel for automobiles and its preparation metho
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[0035] In Embodiment 2, the low-density high-strength steel includes the following components: 0.38% by mass of C, 0.20% by mass of Si, 1.6% by mass of Mn, 4.5% by mass of Alt, and Ce is 0.03%, P is 0.008% by mass, S is 0.004% by mass, N is 0.004% by mass, and the balance is Fe and trace elements.
Example Embodiment
[0036] In Embodiment 3, the low-density high-strength steel includes the following components: 0.35% by mass of C, 0.50% by mass of Si, 1.8% by mass of Mn, 4.0% by mass of Alt, and Ce is 0.025%, P is 0.007% by mass, S is 0.005% by mass, N is 0.005% by mass, and the balance is Fe and trace elements.
[0037] In embodiment 4, the low-density high-strength steel includes the following components: 0.46% by mass of C, 0.26% by mass of Si, 1.2% by mass of Mn, 4.3% by mass of Alt, and The percentage is 0.035% Ce, the mass percentage is 0.008% P, the mass percentage is 0.003% S, the mass percentage is 0.003% N, and the balance is Fe and trace elements.
[0038] In embodiment 5, the low-density high-strength steel includes the following components: 0.42% by mass of C, 0.38% by mass of Si, 1.4% by mass of Mn, 4.0% by mass of Alt, and The percentage is 0.04% Ce, the mass percentage is 0.007% P, the mass percentage is 0.004% S, the mass percentage is 0.004% N, and the balance is Fe and trace ...
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Abstract
The invention discloses low-density and high-strength steel for automobiles and a preparation method thereof. The low-density and high-strength steel comprises 0.3-0.5% by weight of C, 0.2-0.5% by weight of Si, 1.0-2.0% by weight of Mn, 3.5-4.8% by weight of Alt, 0.02-0.04% by weight of Ce, not larger than 0.01% by weight of P, not larger than 0.01% by weight of S, not larger than 0.004% by weightof N, and the balance Fe and trace elements. Compared with the density of traditional steel, the density of the low-density and high-strength steel is reduced by about 5%, so that the problem that existing steel plates can not meet requirements of lightness, ductility and light weight at the same time is solved. The weight of the automobiles can be substantially reduced when the low-density and high-strength steel is applied to the automobiles.
Description
technical field [0001] The invention relates to the technical field of high-strength light-weight steel, in particular to a low-density high-strength steel for automobiles and a preparation method thereof. Background technique [0002] The rapid development of the automobile industry has brought energy consumption pressure and exhaust pollution problems to human beings, and automobile lightweight is one of the most effective measures to improve fuel economy and reduce automobile emissions. The lightweight of automobiles can be achieved through measures such as lightweight materials, advanced technology and structural optimization, among which the use of lightweight materials is currently the mainstream method. High-strength steel, aluminum alloy, magnesium alloy, engineering plastics, composite materials, etc. are currently common and widely used lightweight materials. However, the single use of high-ductility and high-strength steel plates to achieve light weight has reach...
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