CN101229565A - Technology of manufacturing high strength flat-bulb steel - Google Patents
Technology of manufacturing high strength flat-bulb steel Download PDFInfo
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- CN101229565A CN101229565A CNA2008100693955A CN200810069395A CN101229565A CN 101229565 A CN101229565 A CN 101229565A CN A2008100693955 A CNA2008100693955 A CN A2008100693955A CN 200810069395 A CN200810069395 A CN 200810069395A CN 101229565 A CN101229565 A CN 101229565A
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- high strength
- controlled
- bulb steel
- composition
- strength flat
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Abstract
The invention discloses a technique for producing high strength ball flat steel, which comprises composition control. During the process of the composition control, on the basis that other compositions meet a national standard, Nb of 0.01-0.025 percent is added; the blooming temperature is controlled between 1100 DEG C and 1150 DEG C and the final rolling temperature is controlled between 870 DEG C and 930 DEG C. The invention adds Nb of proper amount in the internal control composition and increases microalloy of the Nb, which can effectively improve stability of the yield strength of the high strength ball flat steel, thereby thoroughly solving the problem of the yield strength of the high strength ball flat steel.
Description
Technical field
The present invention relates to a kind of flat-bulb steel production technology, particularly a kind of production technology of high strength flat-bulb steel.
Background technology
High strength flat-bulb steel is the shipbuilding industry special-purpose section.Because domestic shipbuilding industry is flourish, to the also corresponding increase of demand of flat-bulb steel.And the yield strength problem of unstable of high-strength flat-bulb steel is perplexing shaped steel production always, when influencing the qualification rate of shaped steel, has caused bigger economic loss to factory.
Yield strength is the steel important index, is when design reasonability and the important parameter that need consider of security, the yield limit instability of steel, in work progress or construction waste material occurs after finishing and surpass the strength degree of material and cause accident.
By analysis, the main cause that influences high-strength flat-bulb steel yield strength is except external factors such as rolling mill practice, and topmost is exactly internal factors such as internal control composition.
Therefore, need improve, improve the stability of high strength flat-bulb steel yield strength production technology to high strength flat-bulb steel.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of production technology of high strength flat-bulb steel, can effectively improve the stability of high strength flat-bulb steel yield strength.
The production technology of high strength flat-bulb steel of the present invention, comprise breaking down, finish to gauge and composition control, meet on the basis of national standard at other composition in the composition control, add Nb0.01-0.025%, the breaking down temperature range is controlled between 1100 ℃～1150 ℃, and the finishing temperature scope is controlled between 870 ℃-930 ℃.
Further, add Nb0.015% in the described composition control;
Further, described breaking down temperature range is controlled between 1125 ℃, and the finishing temperature scope is controlled between 900 ℃.
The invention has the beneficial effects as follows: the production technology of high strength flat-bulb steel of the present invention, in the internal control composition, add an amount of Nb, control breaking down and finishing temperature, increased the microalloying of Nb, can effectively improve the stability of high strength flat-bulb steel yield strength, the yield strength problem of high strength flat-bulb steel is solved completely.
The specific embodiment
Embodiment one
The production technology of the D36 type high strength flat-bulb steel of present embodiment comprises that composition control is characterized in that: meet on the basis of national standard at other composition in the composition control, add Nb0.01%; The breaking down temperature range is controlled at 1100 ℃, and the finishing temperature scope is controlled at 870 ℃.
Embodiment two
The production technology of the D36 type high strength flat-bulb steel of present embodiment comprises in the control of composition control composition and meeting on the basis of national standard at other composition, adds Nb0.015%; The breaking down temperature range is controlled at 1125 ℃, and the finishing temperature scope is controlled at 900 ℃; The high strength flat-bulb steel yield strength qualification rate height that present embodiment is produced, stable, qualification rate reaches 100% in the experiment.
Embodiment three
The production technology of the D36 type high strength flat-bulb steel of present embodiment comprises composition control.Meet on the basis of national standard at other composition in the composition control, add Nb0.025%, the breaking down temperature range is controlled at 1150 ℃, and the finishing temperature scope is controlled at 930 ℃.
Embodiment four
The production technology of the A36 type high strength flat-bulb steel of present embodiment comprises composition control.It is characterized in that: meet on the basis of national standard at other composition in the composition control, add Nb0.01%; The breaking down temperature range is controlled at 1100 ℃, and the finishing temperature scope is controlled at 930 ℃;
Embodiment five
The production technology of the A36 type high strength flat-bulb steel of present embodiment comprises composition control.Meet on the basis of national standard at other composition in the composition control, add Nb0.015%; The breaking down temperature range is controlled at 1150 ℃, and the finishing temperature scope is controlled at 900 ℃;
Embodiment six
The production technology of the A36 type high strength flat-bulb steel of present embodiment comprises composition control.Meet on the basis of national standard at other composition in the composition control, add Nb0.025%; The breaking down temperature range is controlled at 1100 ℃, and the finishing temperature scope is controlled at 930 ℃.
Yield strength contrast situation sees the following form before and after adding niobium:
| Lot number | σ s N/mm | σ b N/mm 2 | C | Si | Mn | P | S | Alt | Nb | Ti | As |
| 51-1378 | 390 | 525 | 0.18 | 0.36 | 1.49 | 0.024 | 0.013 | 0.041 | 0.015 | 0.007 | |
| 51-1379 | 400 | 540 | 0.15 | 0.37 | 1.54 | 0.024 | 0.014 | 0.041 | 0.020 | 0.010 | |
| 51-1395 | 385 | 535 | |||||||||
| 51-1397 | 395 | 535 | 0.16 | 0.38 | 1.49 | 0.023 | 0.011 | 0.041 | 0.020 | 0.009 | |
| 61-2217 | 405 | 555 | 0.16 | 0.30 | 1.47 | 0.017 | 0.025 | 0.041 | 0.01 - 0.015 | 0.015 | 0.009 |
| 61-2218 | 430 | 595 | |||||||||
| 61-2220 | 450 | 595 | |||||||||
| 61-2221 | 450 | 585 | 0.15 | 0.42 | 1.45 | 0.016 | 0.016 | 0.047 | 0.015 - 0.025 | 0.018 | 0.011 |
| 61-2223 | 425 | 600 | |||||||||
| 61-2224 | 430 | 620 |
As can be seen from the above table, behind the interpolation Nb, flat-bulb steel yield strength qualification rate is stable.
Above embodiment just plays the effect that clearly demonstrates to the present invention, and above numerical value can be adjusted within the specific limits, also can be other materials that can realize goal of the invention.
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can carry out within the specific limits modification to technical scheme of the present invention, and not breaking away from the aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (3)
1. the production technology of a high strength flat-bulb steel, comprise breaking down, finish to gauge and composition control, it is characterized in that: meet on the basis of national standard at other composition in the composition control, add Nb0.01-0.025%, the breaking down temperature range is controlled between 1100 ℃～1150 ℃, and the finishing temperature scope is controlled between 870 ℃-930 ℃.
2. the production technology of high strength flat-bulb steel according to claim 1 is characterized in that: add Nb0.015% in the described composition control.
3. the production technology of high strength flat-bulb steel according to claim 1 and 2, it is characterized in that: described breaking down temperature range is controlled between 1125 ℃, and the finishing temperature scope is controlled between 900 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100693955A CN101229565A (en) | 2008-02-26 | 2008-02-26 | Technology of manufacturing high strength flat-bulb steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100693955A CN101229565A (en) | 2008-02-26 | 2008-02-26 | Technology of manufacturing high strength flat-bulb steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101229565A true CN101229565A (en) | 2008-07-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CNA2008100693955A Pending CN101229565A (en) | 2008-02-26 | 2008-02-26 | Technology of manufacturing high strength flat-bulb steel |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104583424A (en) * | 2012-06-05 | 2015-04-29 | 蒂森克虏伯钢铁欧洲股份公司 | Steel, sheet steel product and process for producing a sheet steel product |
| CN105734432A (en) * | 2016-03-02 | 2016-07-06 | 宿迁南钢金鑫轧钢有限公司 | Large-size high-strength marine flat-bulb steel and production process thereof |
| CN106555117A (en) * | 2016-12-02 | 2017-04-05 | 钢铁研究总院 | A kind of uniform high strength flat-bulb steel of section performance and its production technology |
| CN112626308A (en) * | 2020-12-25 | 2021-04-09 | 常州东方特钢有限公司 | Production process of high-quality asymmetric flat-bulb steel produced by adding NbN |
-
2008
- 2008-02-26 CN CNA2008100693955A patent/CN101229565A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104583424A (en) * | 2012-06-05 | 2015-04-29 | 蒂森克虏伯钢铁欧洲股份公司 | Steel, sheet steel product and process for producing a sheet steel product |
| CN104583424B (en) * | 2012-06-05 | 2017-03-08 | 蒂森克虏伯钢铁欧洲股份公司 | The manufacture method of steel, flat product and flat product |
| CN105734432A (en) * | 2016-03-02 | 2016-07-06 | 宿迁南钢金鑫轧钢有限公司 | Large-size high-strength marine flat-bulb steel and production process thereof |
| CN106555117A (en) * | 2016-12-02 | 2017-04-05 | 钢铁研究总院 | A kind of uniform high strength flat-bulb steel of section performance and its production technology |
| CN112626308A (en) * | 2020-12-25 | 2021-04-09 | 常州东方特钢有限公司 | Production process of high-quality asymmetric flat-bulb steel produced by adding NbN |
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Open date: 20080730 |