Making method of steel plate for auto girders
A technology of automobile longitudinal beams and steel plates, which is applied in the field of iron and steel metallurgy, can solve the problems of few research reports on longitudinal beam steel with a tensile strength of 590MPa, and achieve the effects of stable mechanical properties, high and low temperature impact toughness, and good surface quality
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[0021] Example one
[0022] A method for preparing a steel plate for automobile longitudinal beams, the steel plate for longitudinal beams is composed of the following components in weight percentage: C: 0.04%; Si: 0.50%; Mn: 1.70%; P: ≤ 0.015%; S: ≤0.008%; Nb: 0.07%; Ca: 0.04%, Al: 0.05%, Ti: 0.04%, the rest is iron and residual trace impurities; the preparation method includes the following steps:
[0023] 1) Hot metal pretreatment: Desulfurization of hot metal;
[0024] 2) Converter smelting: removing P, Si, C and alloying of molten iron;
[0025] 3) Post-furnace refining: deep desulfurization process and molten steel alloying treatment by LF furnace and adding iron-calcium wire for inclusion modification treatment;
[0026] 4) Continuous casting: The refined molten steel is protected and cast by the continuous casting machine to become a slab with a thickness of 230mm;
[0027] 5) Slab heating: the cast slab is sent to the hot continuous rolling mill after cold charging and heating,...
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[0032] Example two
[0033] A method for preparing a steel plate for automobile longitudinal beams, the steel plate for longitudinal beams is composed of the following components in terms of weight percentage: C: 0.06%; Si: 0.30%; Mn: 1.90%; P: ≤ 0.015%; S: ≤0.008%; Nb: 0.05%; Ca: 0.06%, Al: 0.03%, Ti: 0.05%, the rest is iron and residual trace impurities; the preparation method includes the following steps:
[0034] 1) Hot metal pretreatment: Desulfurization of hot metal;
[0035] 2) Converter smelting: removing P, Si, C and alloying of molten iron;
[0036] 3) Post-furnace refining: deep desulfurization process and molten steel alloying treatment by LF furnace and adding iron-calcium wire for inclusion modification treatment;
[0037] 4) Continuous casting: The refined molten steel is protected and cast by the continuous casting machine to become a slab with a thickness of 250mm;
[0038] 5) Slab heating: the cast slab is sent to the hot continuous rolling mill after cold charging and...
Example Embodiment
[0043] Example three
[0044] A method for preparing a steel plate for automobile longitudinal beams. The steel plate for longitudinal beams consists of the following components in terms of weight percentage: C: 0.05%; Si: 0.40%; Mn: 1.80%; P: ≤ 0.015%; S: ≤0.008%; Nb: 0.06%; Ca: 0.05%, Al 0.04%, Ti 0.045%, the rest are iron and residual trace impurities; the preparation method includes the following steps:
[0045] 1) Hot metal pretreatment: Desulfurization of hot metal;
[0046] 2) Converter smelting: removing P, Si, C and alloying of molten iron;
[0047] 3) Post-furnace refining: deep desulfurization process and molten steel alloying treatment by LF furnace and adding iron-calcium wire for inclusion modification treatment;
[0048] 4) Continuous casting: The refined molten steel is protected and cast by the continuous casting machine to become a slab with a thickness of 240mm;
[0049] 5) Slab heating: the cast slab is sent to the hot continuous rolling mill after cold charging and ...
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