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Non-quenched and tempered 950MPa-grade high-strength strapping steel and production method thereof

A production method, non-quenching and tempering technology, applied in the direction of solid-state diffusion coating, coating, metal rolling, etc., can solve the problems of high cost and general surface quality of strip steel, and achieve low production cost, good surface quality, and process simple effect

Pending Publication Date: 2022-06-21
ANYANG IRON & STEEL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the surface quality of the strip steel produced by the existing strip steel production method is relatively general, its performance is relatively common, and the production cost is high, so it is difficult to meet the production demand

Method used

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  • Non-quenched and tempered 950MPa-grade high-strength strapping steel and production method thereof
  • Non-quenched and tempered 950MPa-grade high-strength strapping steel and production method thereof
  • Non-quenched and tempered 950MPa-grade high-strength strapping steel and production method thereof

Examples

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Embodiment 1

[0027] This embodiment provides a non-quenched and tempered 950MPa grade high-strength strapping steel and a production method thereof, such as figure 1 As shown, according to mass percentage, it is prepared from the following raw materials: C: 0.20%, Si: 0.23%, Mn: 0.62%, P: 0.015%, S: 0.008%, Al: 0.025%, the rest is iron and inevitable of impurities.

[0028] The thickness of the strapping steel is 0.90mm.

[0029] The invention also discloses a production method of non-quenched and tempered 950MPa grade high-strength strapping steel, the specific steps are as follows:

[0030] (S1), heating process: heating the slab;

[0031] (S2), hot rolling process: the heated slab is subjected to hot continuous rolling, and the front section is centrally cooled, and then coiled to form a coil;

[0032] (S3), pickling process: pickling the coil, and cold rolling the coil after pickling.

[0033] (S4), bluing process: bluing treatment is performed on the coil to obtain strapping steel...

Embodiment 2

[0039] This embodiment provides a non-quenched and tempered 950MPa grade high-strength strapping steel and a production method thereof, such as figure 1 As shown, according to mass percentage, it is prepared from the following raw materials: According to mass percentage, it is prepared from the following raw materials: C: 0.19%, Si: 0.18%, Mn: 0.62%, P: 0.025%, S: 0.004%, Al: 0.015%, the rest is iron and inevitable impurities.

[0040] The thickness of the strapping steel is 0.90mm.

[0041] The invention also discloses a production method of non-quenched and tempered 950MPa grade high-strength strapping steel, the specific steps are as follows:

[0042] (S1), heating process: heating the slab;

[0043] (S2), hot rolling process: the heated slab is subjected to hot continuous rolling, and the front section is centrally cooled, and then coiled to form a coil;

[0044] (S3), pickling process: pickling the coil, and cold rolling the coil after pickling.

[0045] (S4), bluing ...

Embodiment 3

[0051] This embodiment provides a non-quenched and tempered 950MPa grade high-strength strapping steel and a production method thereof, such as figure 1 As shown, according to mass percentage, it is prepared from the following raw materials: C: 0.19%, Si: 0.17%, Mn: 0.64%, P: 0.012%, S: 0.006%, Al: 0.022%, the rest is iron and inevitable of impurities.

[0052] The thickness of the strapping steel is 0.80mm.

[0053] The invention also discloses a production method of non-quenched and tempered 950MPa grade high-strength strapping steel, the specific steps are as follows:

[0054] (S1), heating process: heating the slab;

[0055] (S2), hot rolling process: the heated slab is subjected to hot continuous rolling, and the front section is centrally cooled, and then coiled to form a coil;

[0056] (S3), pickling process: pickling the coil, and cold rolling the coil after pickling.

[0057] (S4), bluing process: bluing treatment is performed on the coil to obtain strapping steel...

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Abstract

The invention discloses non-quenched and tempered 950 MPa-grade high-strength strapping steel and a production method thereof.The non-quenched and tempered 950 MPa-grade high-strength strapping steel is prepared from, by mass, 0.18%-0.25% of C, 0.15%-0.25% of Si, 0.65%-0.85% of Mn, smaller than or equal to 0.035% of P, smaller than or equal to 0.025% of S, 0.005%-0.035% of Al and the balance iron and inevitable impurities, the non-quenched and tempered 950 MPa-grade high-strength strapping steel is suitable for production of the strapping steel, C and Mn serve as strengthening elements, a proper amount of Al is added to refine grains, and therefore the strength of the strapping steel is improved; and meanwhile, granular bainite is obtained by adopting ultralow-temperature coiling and laminar flow front-section concentrated cooling in hot rolling, and a proper bluing process with a large compression ratio is adopted in cold rolling, so that the excellent performance and the surface quality of a final product are ensured.

Description

technical field [0001] The invention belongs to the technical field of strip steel production, in particular to a non-quenched and tempered 950MPa grade high-strength strap steel and a production method thereof. Background technique [0002] Strip steel is a kind of narrow and long steel plate produced by various steel rolling enterprises in order to meet the needs of industrialized production of various metal or mechanical products in different industrial sectors; [0003] However, the surface quality of the strip produced by the existing strip production method is relatively general, its performance is relatively general, and the production cost is relatively high, so it is difficult to meet the production demand. SUMMARY OF THE INVENTION [0004] The purpose of the present invention is to overcome the defects of the prior art, and to provide a non-quenched and tempered 950MPa grade high-strength strapping steel and a production method thereof. [0005] To achieve the a...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/06C21D8/02C23C8/10B21B1/22B21B37/74
CPCC22C38/02C22C38/04C22C38/06C21D8/0205C21D8/0226C21D8/0278C21D8/0236C23C8/10B21B1/22B21B37/74C21D2211/002B21B2001/221B21B2001/225
Inventor 厚健龙程官江武宝庆欧阳瑜黄重王新志向华何晓波李娜刘伟云李堃成晓举于永业白玉静陈丛虎
Owner ANYANG IRON & STEEL
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