Steel-aluminum compound hot rolled steel with tensile strength of 310MPa and production method thereof
A technology of tensile strength and steel-aluminum compounding, applied in the field of hot-rolled steel for parts, can solve the problems of adding more alloy elements, high cost, and high production cost, and achieve the effects of ensuring stability, improving stiffness, and reducing product cost
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[0025] Describe in detail below
[0026] The components and weight percentages according to the present invention are as follows: the components and weight percentages are as follows: C: 0.004-0.006%, Si: <0.015%, Mn: 0.25-0.35%, Al: 0.0021-0.0030%, P: ≤0.022% , S: <0.006%, O: ≤0.003%, and the rest are Fe and unavoidable impurities. as well as
[0027] production method:
[0028] 1) Desulfurization is carried out to molten iron, and the percentage by weight of controlling S is <0.006%;
[0029] 2) Refining outside the furnace, control: the weight percentage of C is 0.004-0.006%, and the weight percentage of Al is 0.0021-0.003%;
[0030] 3) Carry out continuous casting, in the continuous casting process, adopt the covering agent that the weight percent of C is 0.1%, and adopt argon protection pouring, the flow rate of its argon is controlled at 11-13NM 3 / Hour;
[0031] 4) Heating the continuous casting slab, the heating temperature is controlled at 1220-1238°C;
[0032] ...
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Abstract
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