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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

Inactive Publication Date: 2014-05-14
无锡市锡山区鹅湖镇荡口青荡金属制品厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the production technology of longitudinal beam steel with a tensile strength of 510MPa is quite mature and widely used, and there are many related research reports, but there are relatively few research reports on longitudinal beam steel with a tensile strength of 590MPa

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for preparing a steel plate for an automobile longitudinal beam. The steel plate for a longitudinal beam 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: desulfurize the hot metal;

[0024] 2) Converter smelting: removing P, Si, C and alloying the molten iron;

[0025] 3) Post-furnace refining: LF furnace adopts deep desulfurization process and molten steel alloying treatment, and adds iron-calcium wire for inclusion denaturation 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 cold loaded and heated and sent to the hot continuous rolling mill. The slab h...

Embodiment 2

[0033] A method for preparing a steel plate for an automobile longitudinal beam, wherein the steel plate for a longitudinal beam consists 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: desulfurize the hot metal;

[0035] 2) Converter smelting: removing P, Si, C and alloying the molten iron;

[0036] 3) Post-furnace refining: LF furnace adopts deep desulfurization process and molten steel alloying treatment, and adds iron-calcium wire for inclusion denaturation 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 cold loaded and heated and then sent to the hot continuous rolli...

Embodiment 3

[0044] A method for preparing a steel plate for an automobile longitudinal beam. The steel plate for a longitudinal beam is composed of the following components in 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%, Ti0.045%, the rest is iron and residual trace impurities; the preparation method includes the following steps:

[0045] 1) Hot metal pretreatment: desulfurize the hot metal;

[0046] 2) Converter smelting: removing P, Si, C and alloying the molten iron;

[0047] 3) Post-furnace refining: LF furnace adopts deep desulfurization process and molten steel alloying treatment, and adds iron-calcium wire for inclusion denaturation 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 cold loaded and heated and sent to the hot continuous rolling mill. The slab heati...

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PUM

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Abstract

The invention discloses a making method of a steel plate for auto girders. The steel plate for auto girders is composed of C, Si, Mn, P, S, Nb, Ca, Al, Ti, Fe and the like. The hot-rolled coiled plate having the advantages of pure steel, excellent comprehensive properties and uniform and fine grain size is obtained through reasonable chemical component blending by adopting converter smelting, refining, protected casting of a continuous caster, and controlled rolling and cooling technologies. The tensile strength, the yield strength and the elongation percentage of the steel plate for auto girders are 585-610MPa, 500-520MPa and 30-35%, and the steel plate for auto girders can satisfy production demands of heavy duty auto girders, and can also be used for producing other high-strength automobile structure members.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a method for preparing steel plates for automobile longitudinal beams. Background technique [0002] The car longitudinal beam is the load-bearing part of the car, and it is also a safety part during the driving of the car. Longitudinal beams of trucks and large passenger and trucks are generally made of 6-12mm hot-rolled steel plates. With the rapid development of my country's automobile industry and traffic and transportation industries, the demand for large-tonnage trucks and large luxury passenger cars continues to increase. In order to reduce the weight of vehicles, achieve energy saving, reduce environmental pollution and improve carrying efficiency, it is important to increase the strength of steel plates. It is an important means and method to realize the lightweight of automobiles. At home and abroad, at this stage, a certain amount of microalloying el...

Claims

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Application Information

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IPC IPC(8): C22C38/14C22C33/04C21D8/02
Inventor 钱永清
Owner 无锡市锡山区鹅湖镇荡口青荡金属制品厂
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