Low-density and high-strength steel for automobiles and preparation method thereof
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.
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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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