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380L vehicle beam black steel and production method thereof

An automobile beam and production method technology, applied in the field of steelmaking, can solve the problems of uneven thickness of oxide layer, unstable structure of surface oxide layer, etc., and achieve the effects of good adhesion, excellent mechanical properties, and excellent mechanical properties

Inactive Publication Date: 2015-10-21
BENGANG STEEL PLATES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a 380L black skin steel for automobile frame and its production method, which aims to solve the problem of unstable structure of the oxide layer on the surface and uneven thickness of the oxide layer at different positions of the roll.

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  • 380L vehicle beam black steel and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A 380L black skin steel for automobile beams, characterized in that, according to the mass percentage, it is composed of the following components: C: 0.07%; Si: 0.06%; Mn: 0.90%; P: 0.010%; S: 0.006%; Als: 0.03%; Nb: 0.030%; Cr: 0.10%; Ti: 0.010%;

[0019] The production method of the 380L black skin steel for automobile frame with the above composition comprises the steps of: hot metal desulfurization pretreatment→converter smelting→RH refining→continuous casting→hot continuous rolling;

[0020] Among them, in hot continuous rolling, the casting billet is heated at 1200°C and held for 2 hours. After heating, it enters rough rolling. During rough rolling, high pressure water descaling requires a pressure of 15MPa; when entering rough rolling, R1 two rolls are reversible. The roughing mill is put into 3 passes, the R2 four-high reversible roughing mill is put into 2 passes, and the rolling start temperature is controlled at 1190°C±20°C when passing through the R1 two-rol...

Embodiment 2

[0034] The difference from Implementation 1 is that: a 380L black skin steel for automobile beams is composed of the following components according to the mass percentage: C: 0.06%; Si: 0.02%; Mn: 0.81%; P: 0.008%; S: 0.002%; Als: 0.02%; Nb: 0.020%; Cr: 0.08%; Ti: 0.0050%; the balance is Fe

[0035] The production method of the above-mentioned 380L black skin steel for automobile frame comprises the steps of: hot metal desulfurization pretreatment→converter smelting→RH refining→continuous casting→hot continuous rolling;

[0036] Among them, in hot continuous rolling, the casting billet is heated at 1270°C and held for 3 hours. After heating, it enters rough rolling. During rough rolling, high-pressure water descaling requires a pressure of 20MPa; when entering rough rolling, R1 two-rollers are reversible. The roughing mill is put into 3 passes, the R2 four-high reversible roughing mill is put into 2 passes, and the rolling start temperature is controlled at 1190°C±20°C when pa...

Embodiment 3

[0040] The difference from Example 1 is that a 380L black skin steel for automobile frame is composed of the following components according to the mass percentage: C: 0.08%; Si: 0.08%; Mn: 0.93%; P: 0.012% ; S: 0.007%; Als: 0.04%; Nb: 0.033%; Cr: 0.11%; Ti: 0.020%;

[0041] The production method of the 380L black skin steel for automobile frame with the above composition comprises the steps of: hot metal desulfurization pretreatment→converter smelting→RH refining→continuous casting→hot continuous rolling;

[0042] Among them, in hot continuous rolling, the casting billet is heated at 1200°C and held for 5 hours. After heating, it enters rough rolling. Three roll reversible roughing mills are used for 3 passes, R2 four-high reversible roughing mills are put into two passes, and the rolling start temperature is controlled at 1190°C±20°C when passing through R1 two-roller reversible roughing mills;

[0043] After the rough rolling, it enters the fine rolling. The temperature of ...

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Abstract

The present invention belongs to the field of steelmaking, and particularly relates to a 380L vehicle beam black steel and a production method thereof, wherein the 380L vehicle beam black steel comprises, by mass, 0.06-0.08% of C, 0.02-0.08% of Si, 0.81-0.93% of Mn, 0.008-0.012% of P, 0.002-0.007% of S, 0.02-0.04% of Als, 0.020-0.033% of Nb, 0.08-0.11% of Cr, 0.0050-0.020% of Ti, and the balance of Fe. The produced 380L vehicle beam hot-rolling black surface steel of the present invention has characteristics of stable chemical component, pure steel, excellent mechanical property, excellent stamping molding performance, and excellent corrosion resistance.

Description

technical field [0001] The invention belongs to the field of steelmaking, and in particular relates to a black skin steel for 380L automobile frame and a production method thereof. Background technique [0002] In the contemporary steel production process, pickling is mainly used to improve the surface quality of products, but the waste acid produced seriously damages the ecological environment. Automobile manufacturers use ordinary hot-rolled steel plates to directly stamp parts such as automobile beams without pickling, and iron oxide scales will fall off or become dust, causing environmental pollution, affecting the service life of stamping dies and being uneconomical, and seriously affecting the quality of automobile parts. step-by-step production. For this reason, wish to have the steel plate that iron sheet does not come off during stamping to replace existing common hot-rolled steel plate. Automobile manufacturers need steel mills to provide pickling-free steel shee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/28C21D8/02
Inventor 赵迪张立龙孙忠斌
Owner BENGANG STEEL PLATES
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