CN105506253B - Method for improving tensile property of TMCP ship plate steel - Google Patents
Method for improving tensile property of TMCP ship plate steel Download PDFInfo
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- CN105506253B CN105506253B CN201410505138.7A CN201410505138A CN105506253B CN 105506253 B CN105506253 B CN 105506253B CN 201410505138 A CN201410505138 A CN 201410505138A CN 105506253 B CN105506253 B CN 105506253B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 40
- 239000010959 steel Substances 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 14
- RMLPZKRPSQVRAB-UHFFFAOYSA-N tris(3-methylphenyl) phosphate Chemical compound CC1=CC=CC(OP(=O)(OC=2C=C(C)C=CC=2)OC=2C=C(C)C=CC=2)=C1 RMLPZKRPSQVRAB-UHFFFAOYSA-N 0.000 title claims abstract description 12
- 238000005096 rolling process Methods 0.000 claims abstract description 35
- 238000001816 cooling Methods 0.000 abstract description 5
- 239000004575 stone Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 210000003746 feather Anatomy 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000000930 thermomechanical effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The invention relates to a method for improving tensile property of TMCP ship plate steel, wherein rolling is divided into three rolling stages, and the tensile property of steel plates is improved by controlling the rolling temperature and the rolling reduction of each stage of steel plates with different thicknesses and adjusting a controlled cooling process, so that the tensile property of the TMCP ship plate steel in each size range is finally improved.
Description
Technical field
The invention belongs to hot rolled strip technology field, more particularly to a kind of method of raising TMCP ship steel tensile properties.
Background technology
Ship structure steel plate is one of maximum, various in style steel grade of shipbuilding industry consumption.With the hair of global economy
Exhibition, the process of integration gradually deeply, world shipping industry is to develop rapidly, and large-tonnage ships demand just increases year by year, high-level
Ship steel demand is more and more.Ship steel, which has, requires high, and the features such as examining strict, is one of high added value steel products,
Ship steel production is put into an important position by major manufacturers.
TMCP(ThermoMechanicalControlProcess：Thermomechanical control technique) be exactly in the hot rolling,
On the basis of control heating-up temperature, rolling temperature and drafts (ControlRolling), then implement air cooling or control cooling
And accelerate the technology general name of cooling (AcceleratedCooling).
The special thickness of TMCP (>40mm) deck of boat because quenching degree it is poor, core structure transformation it is uneven, generally existing tensile strength compared with
Low, or even the situation that performance does not conform to, the feather weight TMCP deck of boat performance disqualification rates of part 36 are even up to 60% or so.To becoming a useful person
Rate and contract execution are affected greatly.
The content of the invention
To overcome the deficiencies in the prior art, it is an object of the invention to provide a kind of side of raising TMCP ship steel tensile properties
Method, for the finished product thick plate steel more than 40mm, solves the problem of its tensile property is relatively low.
To achieve the above object, the present invention is achieved through the following technical solutions：
A kind of method of raising TMCP ship steel tensile properties, rolling is divided into three rolling sequences：Cogging, secondary rolling,
Three rollings, are concretely comprised the following steps：
1) steel plate thickness is 40~60mm, and steel plate foundation width scope is 1300~2200mm, and two-stage start rolling temperature is
950~970 DEG C, the accumulative reduction ratio of two-stage is 30~35%, and three stage start rolling temperatures are 830~850 DEG C, the finish to gauge of three stages
Temperature is 750~780 DEG C, and it is 48~52% that three stages, which added up reduction ratio,；
Steel plate thickness is 60~80mm, and steel plate foundation width scope is 1300~2200mm, and two-stage start rolling temperature is 950
~970 DEG C, the accumulative reduction ratio of two-stage is 30~35%, and three stage start rolling temperatures are 830~850 DEG C, three stages finish to gauge temperature
Spend for 770~790 DEG C, it is 30~35% that three stages, which added up reduction ratio,；
Steel plate thickness is 80~100mm, and steel plate foundation width scope is 1300~2200mm, and two-stage start rolling temperature is
950~970 DEG C, the accumulative reduction ratio of two-stage is 20~30%, and three stage start rolling temperatures are 830~850 DEG C, the finish to gauge of three stages
Temperature is 780~800 DEG C, and it is 30~35% that three stages, which added up reduction ratio,；
2) control it is cold during, steel plate thickness is 40~60mm, opens cold temperature for 760~780 DEG C, red temperature is 540~
600 DEG C, cooldown rate is 7~15 DEG C/s；
Steel plate thickness is 60~80mm, and it is 760~780 DEG C to open cold temperature, and red temperature is 440~500 DEG C, cooldown rate
For 2.5~7 DEG C/s；
Steel plate thickness is 80~100mm, and it is 770~790 DEG C to open cold temperature, and red temperature is 450~510 DEG C, cooling speed
Rate is 1.5~2.5 DEG C/s.
Described steel plate width scope is divided into 6 incremental groups, is first group of foundation width respectively：1300~
2200mm；Second group of 2200~2800mm；3rd group：2800~3400mm；4th group：3400~4000mm；5th group：4000
~4600mm；6th group：4600~5200mm；Often it is incremented by a group, two-stage start rolling temperature increases by 10 DEG C than a upper group.
Compared with prior art, the beneficial effects of the invention are as follows：
By changing rolling mill practice and controlling cold technique, the tensile property of steel plate is improved.
Embodiment
The present invention is described in detail below, it should be noted that the implementation of the present invention is not limited to following embodiment party
Formula.
A kind of method of raising TMCP ship steel tensile properties, rolling is divided into three rolling sequences：Cogging, secondary rolling,
Three rollings, specific rolling mill practice step is shown in Table one, table three：
The rolling mill practice of table one
The width group of table two away from
| Group is away from shelves | 1 | 2 | 3 | 4 | 5 | 6 |
| Group is away from (mm) | 1300~2200 | >2200~2800 | >2800~3400 | >3400~4000 | >4000~4600 | >4600~5200 |
Wherein, the width group in table one is away from being that first group of table two is kept off away from, width group away from every increase by 1, two-stage open rolling
Temperature increases by 10 DEG C.
Table three controls cold technique
Embodiment：
Exemplified by producing 60mm thickness EH36 steel：
Roll and control cold technique：
Final performance：
Attached test stone：
| Rp0.2, Mpa | Rm, Mpa | A% | Conventional -40 DEG C of impact |
| ≥355 | 490~620 | ≥21 | ≥41 |
Comparison test result and test stone, it can be seen that：60mm thickness EH36 tensile property meets standard, and performance
Surplus capacity is preferable.
Claims (1)
1. a kind of method of raising TMCP ship steel tensile properties, it is characterised in that rolling is divided into three rolling sequences：Cogging,
Secondary rolling, three rollings, are concretely comprised the following steps：
1) steel plate thickness be 40~60mm, steel plate foundation width scope be 1300~2200mm, two-stage start rolling temperature be 950~
970 DEG C, the accumulative reduction ratio of two-stage is 30~35%, and three stage start rolling temperatures are 830~850 DEG C, three stage finishing temperatures
For 750~780 DEG C, it is 48~52% that three stages, which added up reduction ratio,；
Steel plate thickness be 60~80mm, steel plate foundation width scope be 1300~2200mm, two-stage start rolling temperature be 950~
970 DEG C, the accumulative reduction ratio of two-stage is 30~35%, and three stage start rolling temperatures are 830~850 DEG C, three stage finishing temperatures
For 770~790 DEG C, it is 30~35% that three stages, which added up reduction ratio,；
Steel plate thickness be 80~100mm, steel plate foundation width scope be 1300~2200mm, two-stage start rolling temperature be 950~
970 DEG C, the accumulative reduction ratio of two-stage is 20~30%, and three stage start rolling temperatures are 830~850 DEG C, three stage finishing temperatures
For 780~800 DEG C, it is 30~35% that three stages, which added up reduction ratio,；
2) during control is cold, steel plate thickness is 40~60mm, and it is 760~780 DEG C to open cold temperature, and red temperature is 540~600
DEG C, cooldown rate is 7~15 DEG C/s；
Steel plate thickness is 60~80mm, and it is 760~780 DEG C to open cold temperature, and red temperature is 440~500 DEG C, and cooldown rate is
2.5~7 DEG C/s；
Steel plate thickness is 80~100mm, and it is 770~790 DEG C to open cold temperature, and red temperature is 450~510 DEG C, and cooldown rate is
1.5~2.5 DEG C/s；
Step 1) described in steel plate width scope be divided into 6 incremental groups, be first group of foundation width respectively：1300~
2200mm；Second group of 2200~2800mm；3rd group：2800~3400mm；4th group：3400~4000mm；5th group：4000
~4600mm；6th group：4600~5200mm；Often it is incremented by a group, two-stage start rolling temperature increases by 10 DEG C than a upper group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410505138.7A CN105506253B (en) | 2014-09-25 | 2014-09-25 | Method for improving tensile property of TMCP ship plate steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410505138.7A CN105506253B (en) | 2014-09-25 | 2014-09-25 | Method for improving tensile property of TMCP ship plate steel |
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| Publication Number | Publication Date |
|---|---|
| CN105506253A CN105506253A (en) | 2016-04-20 |
| CN105506253B true CN105506253B (en) | 2017-10-27 |
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| CN201410505138.7A Active CN105506253B (en) | 2014-09-25 | 2014-09-25 | Method for improving tensile property of TMCP ship plate steel |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113174534B (en) * | 2021-04-13 | 2022-08-16 | 鞍钢股份有限公司 | Large-thickness TMCP-state FO460 steel plate for ships and manufacturing method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101209456A (en) * | 2006-12-27 | 2008-07-02 | 鞍钢股份有限公司 | Production method of high-strength medium-thickness steel plate |
| CN103264052A (en) * | 2013-06-11 | 2013-08-28 | 鞍钢股份有限公司 | Thick-specification high-strength ship plate shape control method |
| CN103331304A (en) * | 2013-07-12 | 2013-10-02 | 鞍钢股份有限公司 | Method for rolling steel plate by medium plate mill |
-
2014
- 2014-09-25 CN CN201410505138.7A patent/CN105506253B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101209456A (en) * | 2006-12-27 | 2008-07-02 | 鞍钢股份有限公司 | Production method of high-strength medium-thickness steel plate |
| CN103264052A (en) * | 2013-06-11 | 2013-08-28 | 鞍钢股份有限公司 | Thick-specification high-strength ship plate shape control method |
| CN103331304A (en) * | 2013-07-12 | 2013-10-02 | 鞍钢股份有限公司 | Method for rolling steel plate by medium plate mill |
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| CN105506253A (en) | 2016-04-20 |
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