CN109252089A - A kind of stress design pipe line steel X65 steel plate and its production method - Google Patents
A kind of stress design pipe line steel X65 steel plate and its production method Download PDFInfo
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- CN109252089A CN109252089A CN201810949447.1A CN201810949447A CN109252089A CN 109252089 A CN109252089 A CN 109252089A CN 201810949447 A CN201810949447 A CN 201810949447A CN 109252089 A CN109252089 A CN 109252089A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
- C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
Abstract
The present invention provides a kind of stress design pipe line steel X65 steel plate and its production methods.Wherein, stress design pipe line steel X65 steel plate includes consisting of ingredient: C:0.030 ~ 0.080%, Mn:1.50 ~ 1.70%, Si:0.10 ~ 0.40%, S≤0.0050%, P :≤0.015%, Nb:0.035 ~ 0.060%, Ti:0.008 ~ 0.025%, V≤0.10%, Alt:0.020 ~ 0.060%, Cr :≤0.20%, Mo :≤0.10%, remaining is Fe and inevitable impurity.Laminar flow sub-sectional cooling technique is used in the production method of the steel plate, solve the problems, such as that relaxation air cooling time length causes production efficiency low in existing production technology, meanwhile solving the problems, such as to lead to performance inconsistency on steel plate length when water is cooling, realize the stable pipe line steel of high efficiency production performance.
Description
Technical field
The invention belongs to steel material field of engineering technology, it is related to a kind of stress design pipe line steel X65 steel plate and its production
Technique particularly produces stress design pipe line steel X65 steel plate using laminar flow sub-sectional cooling technique on steekle mill production line.
Background technique
Oil and gas pipelines engineering more and more needs to carry out in the place such as earthquake zone, tundra, this is just needed largely
Stress design pipe line steel.Stress design pipe line steel more demanding work hardening capacity and uniform elongation.In recent years, it strained
Design pipe line steel obtains batch application at home.Its production technology is generally air-cooled in the laggard Henan that runs of rolling, then at 700 DEG C
Left and right carries out quick water cooling again.It is easy to bring air cooling time after rolling longer in this way, increases the production cycle；Meanwhile before entering water
The temperature difference in steel plate length direction is also easy to bring the fluctuation of performance on length direction, and then influences pipe line steel elongation
Uniformity.
101914723 B of Chinese patent literature CN discloses a kind of hot-rolling large-deformation-resistance pipeline steel, heat in preparation method
Roll process are as follows: roughing finishing temperature be 1000~1100 DEG C, entrance finishing temperature be 890~920 DEG C, finishing temperature be 800~
850℃；Roughing thickness direction reduction ratio is 45~65%；It is air-cooled to 700~740 DEG C after hot rolling, air-cooled relaxation time is 20~
100s；Hot-rolling large-deformation-resistance pipeline steel is obtained to 100~300 DEG C with 3~15 DEG C/s water cooling after air-cooled.The patent hollow cold is speeded
The Henan time is long, extends the pipe line steel production cycle, causes production efficiency low.
Summary of the invention
The object of the present invention is to provide a kind of stress design pipe line steel X65 steel plate, steel plate of the present invention property in the longitudinal direction
It can stablize, there is good work hardening capacity.
It is a further object of the present invention to provide a kind of production methods of above-mentioned stress design pipe line steel X65 steel plate, produce work
Solving relaxation air cooling time length in existing production technology using laminar flow sub-sectional cooling technique in skill causes production efficiency is low to ask
Topic, meanwhile, it solves the problems, such as to lead to performance inconsistency on steel plate length when water is cooling, realizes the stable pipeline of high efficiency production performance
Steel.
To achieve the above object, the technical solution adopted by the present invention are as follows:
A kind of stress design pipe line steel X65 steel plate includes consisting of ingredient by weight percentage: C:0.030~
0.080%, Mn:1.50~1.70%, Si:0.10~0.40%, S≤0.0050%, P :≤0.015%, Nb:0.035~
0.060%, Ti:0.008~0.025%, V≤0.10%, Alt:0.020~0.060%, Cr :≤0.20%, Mo :≤
0.10%, remaining is Fe and inevitable impurity.
As a kind of currently preferred, stress design pipe line steel X65 steel plate, by weight percentage include consisting of at
Point: C:0.050~0.070%, Mn:1.50~1.65%, Si:0.10~0.40%, S≤0.0040%, P :≤0.015%,
Nb:0.035~0.060%, Ti:0.012~0.025%, V≤0.10%, Alt:0.020~0.060%, Cr :≤0.20%,
Mo :≤0.10%, remaining is Fe and inevitable impurity.
The yield strength of stress design pipe line steel X65 steel plate of the invention be 460~480MPa, tensile strength be 620~
650MPa, yield tensile ratio are lower than 0.75, and uniform elongation is greater than 12%, and -25 DEG C of section of shear ratios of dropping hammer are greater than 85%.The steel plate
Comprehensive performance function admirable, meet the requirement of stress design pipe line steel X65.
A kind of production method of above-mentioned stress design pipe line steel X65 steel plate, comprising the following steps:
(1) slab reheating temperature is 1200~1260 DEG C；
(2) it is rolled using two-stage control, recrystallization zone rolling temperature is 1100~1050 DEG C, the accumulative pressure in recrystallization zone
Rate is greater than 50%；Unhydrated cement start rolling temperature is less than or equal to 920 DEG C, and Unhydrated cement adds up reduction ratio and is greater than 60%, finish to gauge
Temperature is 760~810 DEG C；
(3) laminar flow sub-sectional cooling first segment water cooling is cooled to 670~710 DEG C with the speed of 15~25 DEG C/s after rolling, sky
Then cold 9~12s is cooled to 360~440 DEG C through second segment water cooling with the speed of 10~30 DEG C/s, in roller-way and cold bed overhead
It is as cold as room temperature.
Wherein, the structure of steel obtained after step (3) is ferrite and bainite multiphase structure, ferrite accounts for 60~
70%, bainite accounts for 30~40%, which is volume accounting.
Aforementioned production method is suitable for steekle mill production line, is also suitable traditional jobbing sheet-rolling mill with longer section cooling
Production line.In addition, before the rolling the step of belongs to the state of the art, repeat no more in the present invention.
Compared with prior art, the invention has the benefit that
(1) production method of stress design pipe line steel X65 steel plate of the present invention can be effective using laminar flow sub-sectional cooling technique
Control the uniform elongation of steel plate, work hardening capacity with higher.
(2) production method of stress design pipe line steel X65 steel plate of the present invention controls cold technological parameter by optimization, greatly improves
The production efficiency of pipe line steel, reduces energy consumption production cost.
Detailed description of the invention
Fig. 1 is the metallographic structure figure of 1 stress design pipe line steel X65 steel plate of the embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described.
Embodiment 1
The chemical component (wt%) of the present embodiment stress design pipe line steel X65 hot rolled slab is shown in Table 1.
The chemical component (wt%) of 1 stress design pipe line steel X65 steel plate of table
| Element | C | Si | Mn | P | S | Nb | Ti | Alt |
| Content | 0.05 | 0.20 | 1.60 | 0.009 | 0.003 | 0.041 | 0.012 | 0.035 |
Rolling mill practice and laminar flow sub-sectional cooling technique in the production technology of stress design pipe line steel X65 steel plate in the present embodiment
Design parameter it is as shown in table 2.
The production technology of stress design pipe line steel X65 steel plate in the present embodiment: relation reheating temperature is 1250 DEG C, time inside furnace
It is 3 hours.It is rolled using two-stage control, specifically, roughing, that is, 4 passages of recrystallization zone rolling, 1100 DEG C of start rolling temperature, finish to gauge
1075 DEG C of temperature, obtain workpiece thickness 65mm；Finish rolling, that is, Unhydrated cement 9 passages of rolling, 910 DEG C of start rolling temperature, finish to gauge temperature
760 DEG C of degree.Using laminar flow sub-sectional cooling technical cooling to 430 DEG C after rolling, specifically, laminar flow sub-sectional cooling first segment after rolling
Water cooling is cooled to 690 DEG C, air-cooled 10s with the speed of 25 DEG C/s, is then cooled to 430 through second segment water cooling with the cooling rate of 20 DEG C/s
DEG C, it is then cooled to room temperature on roller-way and cold bed, other parameters are as shown in table 2.
Rolling mill practice and the design parameter of laminar flow sub-sectional cooling technique in 2 the present embodiment production technology of table
Fig. 1 is shown in the metallographic structure of the present embodiment stress design pipe line steel X65 steel plate, from figure 1 it appears that the present embodiment
Obtained is the multiphase structure of ferrite (62%) and bainite (38%).
The results of property of the present embodiment stress design pipe line steel X65 steel plate is shown in Table 3.
The performance (wt%) of the stress design pipe line steel X65 steel plate of 3 the present embodiment of table production
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (4)
1. a kind of stress design pipe line steel X65 steel plate, which is characterized in that by weight percentage include consisting of ingredient: C:
0.030 ~ 0.080%, Mn:1.50 ~ 1.70%, Si:0.10 ~ 0.40%, S≤0.0050%, P :≤0.015%, Nb:0.035 ~
0.060%, Ti:0.008 ~ 0.025%, V≤0.10%, Alt:0.020 ~ 0.060%, Cr :≤0.20%, Mo :≤0.10%, remaining is
Fe and inevitable impurity.
2. stress design pipe line steel X65 steel plate according to claim 1, which is characterized in that include by weight percentage with
Lower constituent: C:0.050 ~ 0.070%, Mn:1.50 ~ 1.65%, Si:0.10 ~ 0.40%, S≤0.0040%, P :≤0.015%,
Nb:0.035 ~ 0.060%, Ti:0.012 ~ 0.025%, V≤0.10%, Alt:0.020 ~ 0.060%, Cr :≤0.20%, Mo :≤
0.10%, remaining is Fe and inevitable impurity.
3. stress design pipe line steel X65 steel plate according to claim 1, which is characterized in that the stress design pipe line steel
The yield strength of X65 steel plate is 460 ~ 480MPa, and tensile strength is 620 ~ 650MPa, and yield tensile ratio is lower than 0.75, uniform elongation
Section of shear ratio of dropping hammer greater than 12%, -25 DEG C is greater than 85%.
4. a kind of production method of stress design pipe line steel X65 steel plate as described in any one of claims 1 to 3, feature exist
In, the production method the following steps are included:
(1) slab reheating temperature is 1200 ~ 1260 DEG C；
(2) it is rolled using two-stage control, recrystallization zone rolling temperature is 1100 ~ 1050 DEG C, and it is big that recrystallization zone adds up reduction ratio
In 50%；Unhydrated cement start rolling temperature is less than or equal to 920 DEG C, and Unhydrated cement adds up reduction ratio and is greater than 60%, and finishing temperature is
760~810℃；
(3) laminar flow sub-sectional cooling first segment water cooling is cooled to 670 ~ 710 DEG C with the speed of 15 ~ 25 DEG C/s after rolling, air-cooled 9 ~
Then 12s is cooled to 360 ~ 440 DEG C through second segment water cooling with the speed of 10 ~ 30 DEG C/s, be as cold as room in roller-way and cold bed overhead
Temperature.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810949447.1A CN109252089B (en) | 2018-08-20 | 2018-08-20 | Strain design pipeline steel X65 steel plate and production method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810949447.1A CN109252089B (en) | 2018-08-20 | 2018-08-20 | Strain design pipeline steel X65 steel plate and production method thereof |
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| CN109252089A true CN109252089A (en) | 2019-01-22 |
| CN109252089B CN109252089B (en) | 2020-11-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4015669A4 (en) * | 2019-12-07 | 2022-12-21 | Jiangyin Xingcheng Special Steel Works Co., Ltd | Hic-resistant and large deformation-resistant pipeline steel and preparation method therefor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003006699A1 (en) * | 2001-07-13 | 2003-01-23 | Nkk Corporation | High strength steel pipe having strength higher than that of api x65 grade |
| CN102392187A (en) * | 2011-11-21 | 2012-03-28 | 安阳钢铁股份有限公司 | Cr-containing pipeline steel X70 hot-rolled plate and production method |
| CN106216412A (en) * | 2016-07-29 | 2016-12-14 | 安阳钢铁股份有限公司 | A kind of method utilizing stove volume unit laminar flow sub-sectional cooling to control cut deal phase transformation |
-
2018
- 2018-08-20 CN CN201810949447.1A patent/CN109252089B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003006699A1 (en) * | 2001-07-13 | 2003-01-23 | Nkk Corporation | High strength steel pipe having strength higher than that of api x65 grade |
| CN102392187A (en) * | 2011-11-21 | 2012-03-28 | 安阳钢铁股份有限公司 | Cr-containing pipeline steel X70 hot-rolled plate and production method |
| CN106216412A (en) * | 2016-07-29 | 2016-12-14 | 安阳钢铁股份有限公司 | A kind of method utilizing stove volume unit laminar flow sub-sectional cooling to control cut deal phase transformation |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4015669A4 (en) * | 2019-12-07 | 2022-12-21 | Jiangyin Xingcheng Special Steel Works Co., Ltd | Hic-resistant and large deformation-resistant pipeline steel and preparation method therefor |
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