Hot-rolled deep-punched pickled plate for automobile structures and production method thereof

A technology for automobile structure and production method is applied in the field of hot-rolled deep-drawing pickling plate for automobile structure and its production field, and achieves the effects of less difficulty in process control, simple method and excellent deep-drawing performance.

Inactive Publication Date: 2012-10-10
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Steel grades in the prior art cannot meet this requirement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In terms of weight percentage, the chemical composition of billet is: C: 0.02%, Si: 0.05%, Mn: 0.10%, Cr: 0.40%, Ti: 0.010%, P: 0.010%, S: 0.006%, Als: 0.022% , and the rest are Fe and unavoidable impurities.

[0032] Its production process is: steel billet → hot rolling → laminar flow cooling → coiling → welding head and tail → pickling → smoothing → oiling → finished product. After the steel billet is heated at 1220°C, it is roughly rolled into a 35mm thick intermediate billet by two reversible rough rolling mills for 6 passes, and the rough rolling reduction rate is 82.5%. 1.8mm thick steel coil, the finishing rolling reduction rate is 94.9%, and the finishing rolling temperature is 850°C. After the steel coil is cooled by laminar flow, it enters the coiler to obtain the strip steel. The cooling rate is 19.5°C / s, and the temperature in the coiling step is 701°C. After the strip is welded head to tail, it is pickled, and the pickling flat elongation rate is 1.0%. F...

Embodiment 2

[0035] In terms of weight percentage, the chemical composition of billet is: C: 0.03%, Si: 0.04%, Mn: 0.20%, Cr: 0.50%, Ti: 0.015%, P: 0.010%, S: 0.006%, Als: 0.029% , and the rest are Fe and unavoidable impurities.

[0036] Its production process is: steel billet → hot rolling → laminar flow cooling → coiling → welding head and tail → pickling → smoothing → oiling → finished product. After the steel billet is heated at 1230°C, it is roughly rolled into a 38mm thick intermediate billet by two reversible rough rolling mills for 6 passes, and the rough rolling reduction rate is 81%. For a 2.5mm thick steel coil, the final rolling reduction rate is 93.4%, and the final rolling temperature is 870°C. After the steel coil is cooled by laminar flow, it enters the coiler to obtain the strip steel. The cooling rate is 18.4°C / s, and the temperature in the coiling step is 715°C. After the steel strip is welded head to tail, pickling is carried out, and the elongation rate of pickling f...

Embodiment 3

[0039] In terms of weight percentage, the chemical composition of billet is: C: 0.04%, Si: 0.03%, Mn: 0.25%, Cr: 0.52%, Ti: 0.02%, P: 0.013%, S: 0.007%, Als: 0.043% , and the rest are Fe and unavoidable impurities.

[0040] Its production process is: steel billet → hot rolling → laminar flow cooling → coiling → welding head and tail → pickling → smoothing → oiling → finished product. After the steel billet is heated at 1250°C, it is roughly rolled into a 37mm thick intermediate billet by two reversible rough rolling mills for 6 passes, and the rough rolling reduction rate is 81.5%. For a 4.0mm thick steel coil, the final rolling reduction rate is 89.2%, and the final rolling temperature is 880°C. After the steel coil is cooled by laminar flow, it enters the coiler to obtain the strip steel. The cooling rate is 17.7°C / s, and the temperature in the coiling step is 740°C. After the strip is welded head to tail, it is pickled, and the pickling flat elongation rate is 1.8%. Fina...

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Abstract

The invention relates to a hot-rolled deep-punched pickled plate for automobile structures and a production method thereof. The hot-rolled deep-punched pickled plate for the automobile structures comprises the components in percentage by weight: 0.02-0.05% of C, not more than 0.05% of Si, 0.10-0.30% of Mn, 0.40-0.60% of Cr, 0.01-0.02% of Ti, not more than 0.15% of P, not more than 0.008% of S, 0.02-0.07% of Als, and the balance of Fe and inevitable impurities. The production method of the hot-rolled deep-punched pickled plate for the automobile structures comprises the step of: controlling the chemical components in the steel, the hot rolling process, the pickling process and other parameters to manufacture the hot-rolled deep-punched pickling plate for the automobile structures. The hot-rolled deep-punched pickled plate for the automobile structures has the characteristic of excellent deep punching performance; and the production method of the hot-rolled deep-punched pickled plate for the automobile structures has the advantages of low difficulty in process control, strong operability, simple method, low cost and the like.

Description

technical field [0001] The invention relates to a hot-rolled deep-drawn pickled plate and a production method thereof, more specifically, to a hot-rolled deep-drawn pickled plate for automobile structures and a production method thereof. Background technique [0002] The hot-rolled deep-drawn pickled plate is made of high-quality hot-rolled thin plate, which is made by removing the oxide layer, trimming and finishing by the pickling unit. The main processing procedures of the hot-rolled deep-drawn pickled plate include laser welding, turbulence Flow pickling, online leveling, trimming, online oiling, etc., its surface quality and use requirements are between hot-rolled and cold-rolled sheets, and it is an ideal substitute for some hot-rolled and cold-rolled sheets. [0003] The advantages of hot-rolled deep-drawn pickled plate are: 1) The surface quality is good, because the hot-rolled deep-drawn pickled plate removes the surface oxide scale, which improves the surface quali...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/28C21D8/04C23G1/08
Inventor 李正荣李军向安平李卫平翁建军李俊洪任守斌
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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