CN109930062A - A method of improving special thick normalizing ship steel tensile property - Google Patents
A method of improving special thick normalizing ship steel tensile property Download PDFInfo
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- CN109930062A CN109930062A CN201811329586.0A CN201811329586A CN109930062A CN 109930062 A CN109930062 A CN 109930062A CN 201811329586 A CN201811329586 A CN 201811329586A CN 109930062 A CN109930062 A CN 109930062A
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Abstract
The present invention relates to a kind of methods for improving special thick normalizing ship steel tensile property, the chemical composition comprises the following components in percentage by weight of the normalizing ship steel are as follows: C≤0.18%, Si≤0.50%, Mn:0.9~1.7%, P≤0.035%, S≤0.35%, ALS >=0.15%, Nb:0.02~0.050%, V:0.05~0.10%, Ti≤0.02%；Thickness >=60mm；Normalizing ship steel increases online ACC and controls cold technique after rolling, and optimizes the cold technological parameter of control.The average value surplus capacity of yield strength >=280Mpa of final normalizing ship steel, tensile strength >=450Mpa, yield strength and tensile strength reaches 40Mpa or more, and Measure of Process Capability Cpk reaches 1.0 or more.
Description
Technical field
The present invention relates to technical field of steel rolling more particularly to a kind of methods for improving special thick normalizing ship steel tensile property.
Background technique
When finished product thickness >=60mm spy's thickness normalizing deck of boat steel rolling, limited by sotck thinkness, compression ratio is generally less than
8, it causes degree of grain refinement insufficient, while normalized treatment has the function of reduction to steel plate stretching intensity, steel plate is easily caused to bend
It is relatively low lower than standard value or tensile strength average performance value surplus capacity to take intensity and tensile strength, a performance of steel plate is closed
Lattice rate is lower.
Summary of the invention
The present invention provides a kind of methods for improving special thick normalizing ship steel tensile property, by increasing after steel plate rolls
Line ACC controls cold technique, and optimizes the cold technological parameter of control, is effectively improved the tensile property of normalizing ship steel, product qualified rate reaches
100%.
In order to achieve the above object, the present invention is implemented with the following technical solutions:
A method of improving special thick normalizing ship steel tensile property, the chemical component by weight hundred of the normalizing ship steel
Ratio is divided to be calculated as: C≤0.18%, Si≤0.50%, Mn:0.9~1.7%, P≤0.035%, S≤0.35%, ALs >=0.15%,
Nb:0.02~0.050%, V:0.05~0.10%, Ti≤0.02%；Thickness >=60mm；The normalizing ship steel increases after rolling
Online ACC controls cold technique, and it is as follows to control cold technological parameter:
With a thickness of the steel plate of 60~80mm: opening 720~780 DEG C of cold temperature, upper 16~18m of water3/ min, lower water 32~
36m3/ min, ACC 0.5~0.7m/s of roller table speed, 620~680 DEG C of final cooling temperature；
With a thickness of the steel plate of 81~100mm: opening 700~760 DEG C of cold temperature, upper 20~22m of water3/ min, lower water 40
~44m3/ min, ACC 0.5~0.7m/s of roller table speed, 600~660 DEG C of final cooling temperature；
Yield strength >=280Mpa of the normalizing ship steel, tensile strength >=450Mpa, yield strength and tensile strength
Average value surplus capacity reach 40Mpa or more.
Compared with prior art, the beneficial effects of the present invention are:
Cold technique is controlled by increasing online ACC after steel plate rolls, and optimizes the cold technological parameter of control, is effectively improved the normalizing deck of boat
The tensile property of steel, product qualified rate reach 100%.
Specific embodiment
A method of improving special thick normalizing ship steel tensile property, the chemical component by weight hundred of the normalizing ship steel
Ratio is divided to be calculated as: C≤0.18%, Si≤0.50%, Mn:0.9~1.7%, P≤0.035%, S≤0.35%, ALS >=0.15%,
Nb:0.02~0.050%, V:0.05~0.10%, Ti≤0.02%；Thickness >=60mm；The normalizing ship steel increases after rolling
Online ACC controls cold technique, and it is as follows to control cold technological parameter:
With a thickness of the steel plate of 60~80mm: opening 720~780 DEG C of cold temperature, upper 16~18m of water3/ min, lower water 32~
36m3/ min, ACC 0.5~0.7m/s of roller table speed, 620~680 DEG C of final cooling temperature；
With a thickness of the steel plate of 81~100mm: opening 700~760 DEG C of cold temperature, upper 20~22m of water3/ min, lower water 40
~44m3/ min, ACC 0.5~0.7m/s of roller table speed, 600~660 DEG C of final cooling temperature；
Yield strength >=280Mpa of the normalizing ship steel, tensile strength >=450Mpa, yield strength and tensile strength
Average value surplus capacity reach 40Mpa or more.
Following embodiment is implemented under the premise of the technical scheme of the present invention, gives detailed embodiment and tool
The operating process of body, but protection scope of the present invention is not limited to following embodiments.Method therefor is such as without spy in following embodiments
Not mentionleting alone bright is conventional method.
[embodiment 1]
In the present embodiment, normalizing ship steel produced is D grades of ship steels, thickness 70mm, chemical component percentage by weight
Than being calculated as: C:0.10%, Si:0.15%, Mn:1.5%, P:0.015%, S:0.015%, ALs:0.035%, Nb:
0.030%, V:0.07%, Ti:0.010%.
Normalizing ship steel increases online ACC and controls cold technique after rolling, it is as follows to control cold technological parameter:
Open 750 DEG C of cold temperature, 15 groups of water nozzle standard-sized sheets, upper water 16.8m3/ min, lower water 33m3/ min, ACC roller table speed
0.6m/s, 671 DEG C of final cooling temperature.
The service check result of normalizing ship steel: yield strength 283Mpa (yield strength standard value is >=235Mpa) resists
Tensile strength 456Mpa (tensile strength standard value is 400~520Mpa).The average value surplus capacity of yield strength and tensile strength is equal
Reach 40Mpa or more, Measure of Process Capability Cpk reaches 1.0 or more, and product qualified rate reaches 100%.
[embodiment 2]
In the present embodiment, normalizing ship steel produced is D grades of ship steels, thickness 85mm, chemical component percentage by weight
Than being calculated as: C:0.09%, Si:0.14%, Mn:1.45%, P:0.013%, S:0.01%, ALs:0.038%, Nb:
0.031%, V:0.075%, Ti:0.010%.
Normalizing ship steel increases online ACC and controls cold technique after rolling, it is as follows to control cold technological parameter:
Open 740 DEG C of cold temperature, 15 groups of water nozzle standard-sized sheets, upper water 21.0m3/ min, lower water 42m3/ min, ACC roller table speed
0.6m/s, 644 DEG C of final cooling temperature.
The service check result of normalizing ship steel: yield strength 288Mpa, tensile strength 451Mpa.Yield strength and tension
The average value surplus capacity of intensity reaches 40Mpa or more, and Measure of Process Capability Cpk reaches 1.0 or more, and product qualified rate reaches
100%.
[embodiment 3]
In the present embodiment, normalizing ship steel produced is D grades of ship steels, thickness 100mm, chemical component percentage by weight
Than being calculated as: C:0.09%, Si:0.15%, Mn:1.48%, P:0.011%, S:0.010%, ALS:0.04%, Nb:
0.033%, V:0.072%, Ti:0.010%.
Normalizing ship steel increases online ACC and controls cold technique after rolling, it is as follows to control cold technological parameter:
Open 732 DEG C of cold temperature, 15 groups of water nozzle standard-sized sheets, upper water 22.0m3/ min, lower water 44m3/ min, ACC roller table speed
0.5m/s, 627 DEG C of final cooling temperature.
The service check result of normalizing ship steel: yield strength 280Mpa, tensile strength 452Mpa.Yield strength and tension
The average value surplus capacity of intensity reaches 40Mpa or more, and Measure of Process Capability Cpk reaches 1.0 or more, and product qualified rate reaches
100%.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (1)
1. a kind of method for improving special thick normalizing ship steel tensile property, which is characterized in that the chemistry of the normalizing ship steel at
Divide by weight percentage are as follows: C≤0.18%, Si≤0.50%, Mn:0.9~1.7%, P≤0.035%, S≤0.35%,
ALS >=0.15%, Nb:0.02~0.050%, V:0.05~0.10%, Ti≤0.02%；Thickness >=60mm；The normalizing ship
Slab increases online ACC and controls cold technique after rolling, it is as follows to control cold technological parameter:
With a thickness of the steel plate of 60~80mm: opening 720~780 DEG C of cold temperature, upper 16~18m of water3/ min, 32~36m of lower water3/
Min, ACC 0.5~0.7m/s of roller table speed, 620~680 DEG C of final cooling temperature；
With a thickness of the steel plate of 81~100mm: opening 700~760 DEG C of cold temperature, upper 20~22m of water3/ min, lower water 40~
44m3/ min, ACC 0.5~0.7m/s of roller table speed, 600~660 DEG C of final cooling temperature；
Yield strength >=280Mpa of the normalizing ship steel, tensile strength >=450Mpa, yield strength and tensile strength are put down
Mean value surplus capacity reaches 40Mpa or more.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811329586.0A CN109930062A (en) | 2018-11-09 | 2018-11-09 | A method of improving special thick normalizing ship steel tensile property |
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| CN201811329586.0A CN109930062A (en) | 2018-11-09 | 2018-11-09 | A method of improving special thick normalizing ship steel tensile property |
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| CN109930062A true CN109930062A (en) | 2019-06-25 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105803175A (en) * | 2016-05-31 | 2016-07-27 | 江阴兴澄特种钢铁有限公司 | Low-compression-ratio ultrathick EH36 ship plate steel and preparation method thereof |
| CN106148833A (en) * | 2015-03-30 | 2016-11-23 | 鞍钢股份有限公司 | A kind of normalizing state 36 feather weight sea work steel steel plate and production method thereof |
| CN107287501A (en) * | 2016-04-04 | 2017-10-24 | 鞍钢股份有限公司 | A kind of anti-hydrogen induced cracking and sulfide corrosion steel plate and its production method |
| CN107779763A (en) * | 2016-08-31 | 2018-03-09 | 鞍钢股份有限公司 | A kind of hic resistance steels for pressure vessel use and its production method |
| CN107779764A (en) * | 2016-08-31 | 2018-03-09 | 鞍钢股份有限公司 | A kind of think gauge sea work steel and production method |
| CN107794355A (en) * | 2016-08-31 | 2018-03-13 | 鞍钢股份有限公司 | A kind of production method of the special thick High-strength ocean platform steel of 250mm |
| CN108754321A (en) * | 2018-06-11 | 2018-11-06 | 鞍钢股份有限公司 | A kind of special thick normalized high-strength steel plate of pressure vessel and its production method |
-
2018
- 2018-11-09 CN CN201811329586.0A patent/CN109930062A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106148833A (en) * | 2015-03-30 | 2016-11-23 | 鞍钢股份有限公司 | A kind of normalizing state 36 feather weight sea work steel steel plate and production method thereof |
| CN107287501A (en) * | 2016-04-04 | 2017-10-24 | 鞍钢股份有限公司 | A kind of anti-hydrogen induced cracking and sulfide corrosion steel plate and its production method |
| CN105803175A (en) * | 2016-05-31 | 2016-07-27 | 江阴兴澄特种钢铁有限公司 | Low-compression-ratio ultrathick EH36 ship plate steel and preparation method thereof |
| CN107779763A (en) * | 2016-08-31 | 2018-03-09 | 鞍钢股份有限公司 | A kind of hic resistance steels for pressure vessel use and its production method |
| CN107779764A (en) * | 2016-08-31 | 2018-03-09 | 鞍钢股份有限公司 | A kind of think gauge sea work steel and production method |
| CN107794355A (en) * | 2016-08-31 | 2018-03-13 | 鞍钢股份有限公司 | A kind of production method of the special thick High-strength ocean platform steel of 250mm |
| CN108754321A (en) * | 2018-06-11 | 2018-11-06 | 鞍钢股份有限公司 | A kind of special thick normalized high-strength steel plate of pressure vessel and its production method |
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Application publication date: 20190625 |
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