CN109594015A - A kind of low cost acid-resisting corrosion X70MS pipe line steel and preparation method thereof - Google Patents
A kind of low cost acid-resisting corrosion X70MS pipe line steel and preparation method thereof Download PDFInfo
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- CN109594015A CN109594015A CN201811390685.XA CN201811390685A CN109594015A CN 109594015 A CN109594015 A CN 109594015A CN 201811390685 A CN201811390685 A CN 201811390685A CN 109594015 A CN109594015 A CN 109594015A
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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
-
- 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
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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
- C21D8/0247—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
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a kind of acid-resistings to corrode X70MS pipe line steel, and chemical component is C:0.04-0.06%, Si:0.10-0.20%, Mn:1.30-1.50%, P :≤0.010%, S :≤0.002%, Nb:0.040-0.050%, Ti:0.010-0.020%, Al:0.020-0.050%, Cr:0.15-0.30%, Cu:0.10-0.20%, Ni:0.10-0.20%, H :≤2ppm, O :≤25ppm, N :≤40ppm, Pcm :≤0.20% by weight percentage.Preparation method is also disclosed.The present invention has obtained a kind of high-intensitive, high tenacity and drop weight tearing performance, inexpensive acid-resisting corrosion X70MS pipe line steel.
Description
Technical field
The present invention relates to technical field of ferrous metallurgy more particularly to a kind of inexpensive acid-resisting corrosion X70MS pipe line steel and
Preparation method.
Background technique
Petroleum gas is the grand strategy and stockpile of national economy, with the high speed development of national economy, for
The demand of the energy such as petroleum and natural gas is increasing, and continuous growth, structural adjustment and the optimization of energy demand have driven stone
The development in an all-round way of oily gas industry.Pipeline is a kind of economy, the means of transportation of continuous safe, have conveying capacity it is big,
The advantages that at low cost, highly-safe, convenient, efficient.
In order to meet the following oil and natural gas demand, the exploitation quantity of the oil gas field containing H2S greatly increased compared with the past.
At the same time, the demand of acid military service pipe line steel is consequently increased.H2S is most corrosiveness in oil and natural gas
One of hazardous medium when conveyance conduit is exposed in the fluid media (medium) containing Wet H2S, is easy to happen H2S sour corrosion, causes pipe
Wall thinned, borrosion hole, or even fracture etc., seriously affect service life and the safe operation of pipeline.Hydrogen induced cracking (HIC) (HIC) and sulfide
Stress corrosion cracking (SSCC) is the principal mode of H2S sour corrosion.
105648327 A of patent publication No. CN discloses Pipeline Steel Plate and the preparation of a kind of small reduction ratio hic resistance and SSC
Method, chemical component C:0.03-0.05%, Si:0.15-0.30%, Mn :≤1.20%, P :≤0.010%, S :≤
0.0020%, Cr :≤0.30%, Ni≤0.20%, Nb:0.035-0.055%, Ti :≤0.030%, Alt:0.015-
0.040%, O≤0.0030%, H≤0.00015%.In conjunction with cooling controlling and rolling controlling process, the steel plate of acquisition have excellent hic resistance and
Anti- SSCC performance, and effective compression ratio is small, even tissue, crystal grain is tiny.But the invention armor plate strength, yield tensile ratio, elongation percentage wave
It moves larger, and does not provide field trash, grain size number.
101928885 A of patent publication No. CN discloses hydrothion corrosion resistant pipe steel and its production method, chemistry
Ingredient: C:0.05-0.10%, Si:0-0.35%, Mn:1.15-1.35%, P:0-0.015%, S:0-0.006%, Nb:
0.04-0.06%, Ti:0.015-0.030%, V:0.035-0.065%, Cu:0.2-0.3%, Ni:0.2-0.3%, Alt:
0.015-0.020%.The steel of the invention remove with high-intensitive, good room temperature and low-temperature impact toughness and good welding,
Outside the performances such as clod wash, also there are the performances such as excellent hydrogen sulfide corrosion resistant.The invention shortcoming is Elements C, S content is higher,
It is unfavorable to pipe line steel weldability, Properties of HIC resistance, and the steel drop weight tearing area value is unlisted；In addition for acidic environment pipe
Line steel should have hic resistance and anti-SSCC performance requirement, which only has hic resistance hydrogen induced cracking (HIC) performance, do not carry out anti-SSCC and answer
Power corrosion check.
Summary of the invention
In order to solve the above-mentioned technical problem, the object of the present invention is to provide a kind of inexpensive acid-resistings to corrode X70MS pipeline
Steel and preparation method thereof.
In order to solve the above technical problems, the present invention adopts the following technical scheme:
A kind of low cost acid-resisting corrosion X70MS pipe line steel, includes following chemical component by weight percentage:
C:0.04-0.06%, Si:0.10-0.20%, Mn:1.30-1.50%, P :≤0.010%, S :≤0.002%,
Nb:0.040-0.050%, Ti:0.010-0.020%, Cr:0.15-0.30%, Cu:0.10-0.20%, Ni:0.10-
0.20%, H :≤1.5ppm, O :≤25ppm, N :≤40ppm, Pcm :≤0.20%, surplus is Fe and inevitable impurity.
Further, by weight percentage include following chemical component:
C:0.048%, Si:0.15%, Mn:1.36%, P:0.005%, S:0.001%, Nb:0.040%, Ti:
0.012%, Cr:0.24%, Cu:0.15%, Ni:0.12%, H:0.00008%, O:0.0012%, N:0.0022%, Pcm:
0.14%, surplus is Fe and inevitable impurity.
Further, by weight percentage include following chemical component:
C:0.052%, Si:0.12%, Mn:1.42%, P:0.004%, S:0.001%, Nb:0.042%, Ti:
0.016%, Cr:0.22%, Cu:0.15%, Ni:0.14%, H:0.00007%, O:0.0015%, N:0.0025%, Pcm:
0.15%, surplus is Fe and inevitable impurity.
Further, include following chemical component according to weight percent:
C:0.055%, Si:0.18%, Mn:1.46%, P:0.006%, S:0.001%, Nb:0.048%, Ti:
0.013%, Cr:0.27%, Cu:0.27%, Ni:0.19%, H:0.00010%, O:0.0013%, N:0.0030%, Pcm:
0.16%, surplus is Fe and inevitable impurity.
A kind of preparation method of low cost acid-resisting corrosion X70MS pipe line steel, includes the following steps:
S1, smelting and casting
Smelting process uses KR method desulphurised hot metal and high-quality steel scrap, and LF refining and RH application of vacuum guarantee Cleanliness of Molten Steel,
LF refining carries out slag making using the big quantity of slag, and RH application of vacuum guarantees the molten steel depth vacuum cycle time, carries out at calcium after vacuum processing
Reason, Ar gas soft blow time are greater than 10min, field trash are made sufficiently to be denaturalized and float；Whole process protection is poured when sheet billet continuous casting, and is used
Dynamic soft reduction technology, to reduce continuous casting billet center segregation；
S2, heating and rolling
1160~1180 DEG C of slab heating temperature, total time inside furnace >=180min, it is ensured that steel billet temperature is uniform；Manufacturing process
For the progress of hot rolling two-stage control, all axial rollings, the first stage is the rolling of austenite recrystallization area, i.e. rough rolling step；Second
Stage is the rolling of austenite Unhydrated cement, i.e. finish rolling stage；
When austenite recrystallization area rolls, start rolling temperature is 1160~1180 DEG C, the first percentage pass reduction > 10%, end
Percentage pass reduction >=25%, sufficiently to refine original austenite grains；
In the rolling of austenite Unhydrated cement, the rolling in this stage extends austenite, finish rolling start rolling temperature≤970
DEG C, finishing temperature is 800~830 DEG C, and finish rolling compression ratio >=3 add up reduction ratio >=75%；
S3, cooling
After controlled rolling, steel band enters ciphering type section cooling region, cooling with the cooling velocity of 15~25 DEG C/s
To 480~530 DEG C, finished steel is finally obtained.
Compared with prior art, advantageous effects of the invention:
By reasonable Design of Chemical Composition, and above-mentioned cooling controlling and rolling controlling process is taken, a kind of available microscopic structure is
The acicular ferrite of fine uniform, 12.0 grades of grain size, high-intensitive, high tenacity and drop weight tearing performance, inexpensive acid-resisting are rotten
Lose X70MS pipe line steel.
Detailed description of the invention
The invention will be further described for explanation with reference to the accompanying drawing.
Fig. 1 is the metallographic structure figure of 1 steel band of the embodiment of the present invention.
Specific embodiment
It is for a more detailed description to the present invention with embodiment below.These embodiments are only to the best embodiment party of the present invention
The description of formula, does not have any restrictions to the scope of the present invention.
Embodiment 1
The chemical component weight percentage of steel band is shown in Table 1.Slab heating temperature is 1175 DEG C, total time inside furnace 180min.
First stage rolling, i.e. austenite recrystallization area roll, and start rolling temperature is 1155 DEG C, the first percentage pass reduction > 10%, extreme trace
Secondary reduction ratio >=25% carries out second stage rolling when rolled piece is with a thickness of 45mm, i.e. austenite Unhydrated cement rolls, and opens
Rolling temperature is 955 DEG C, and finishing temperature is 825 DEG C, and after rolling, steel band enters cooling facility for laminar flow, with the speed of 18 DEG C/s
525 DEG C are cooled to, the steel band finally can be obtained.As shown in Figure 1, microscopic structure is the acicular ferrite of fine uniform, it is brilliant
12.0 grades of granularity.
Embodiment 2
Embodiment is with embodiment 1, and wherein heating temperature is 1170 DEG C, total time inside furnace 185min.First stage rolling
Start rolling temperature be 1158 DEG C, workpiece thickness 45mm, the start rolling temperature of second stage rolling is 948 DEG C, and finishing temperature is
820 DEG C, after rolling, steel band enters cooling facility for laminar flow, is cooled to 502 DEG C with the speed of 20 DEG C/s, institute finally can be obtained
State steel band.
Embodiment 3
Embodiment is with embodiment 1, and wherein heating temperature is 1168 DEG C, total time inside furnace 182min.First stage rolling
Start rolling temperature be 1160 DEG C, workpiece thickness 45mm；The start rolling temperature of second stage rolling is 950 DEG C, and finishing temperature is
812 DEG C, after rolling, steel plate enters cooling facility for laminar flow, is cooled to 488 DEG C with the speed of 21 DEG C/s.Institute finally can be obtained
State steel band.
1 embodiment of the present invention of table, 1~3 chemical component (wt%)
Mechanical properties test is carried out to the steel band of the embodiment of the present invention 1~3, inspection result is shown in Table 2.
The mechanical property of 2 embodiment of the present invention of table, 1~3 steel band
Field trash is carried out to the steel band of the embodiment of the present invention 1~3 and grain size is examined, inspection result is shown in Table 3.
The grain size and field trash of the steel band of 3 embodiment of the present invention 1~3 of table
Hydrogen induced cracking (HIC) (HIC) corrosion test, testing standard: NACE are carried out as required to 1 steel band of the embodiment of the present invention
TM0284, test result are shown in Table 4.
The test of 4 embodiment of the present invention of table, 1 steel band hydrogen induced cracking (HIC) (HIC)
Hydrogen sulfide stress (SSCC) corrosion test, testing standard: NACE are carried out as required to 1 steel band of the embodiment of the present invention
TM0177 and ASTM G39, test result are shown in Table 5.
5 embodiment of the present invention of table 1 steel band hydrogen sulfide stress (SSCC) corrosion test
Embodiment described above is only that preferred embodiment of the invention is described, and is not carried out to the scope of the present invention
It limits, without departing from the spirit of the design of the present invention, those of ordinary skill in the art make technical solution of the present invention
Various changes and improvements, should all fall into claims of the present invention determine protection scope in.
Claims (5)
1. a kind of low cost acid-resisting corrodes X70MS pipe line steel, which is characterized in that by weight percentage include following chemistry at
Point:
C:0.04-0.06%, Si:0.10-0.20%, Mn:1.30-1.50%, P :≤0.010%, S :≤0.002%, Nb:
0.040-0.050%, Ti:0.010-0.020%, Cr:0.15-0.30%, Cu:0.10-0.20%, Ni:0.10-0.20%,
H :≤1.5ppm, O :≤25ppm, N :≤40ppm, Pcm :≤0.20%, surplus is Fe and inevitable impurity.
2. low cost acid-resisting according to claim 1 corrodes X70MS pipe line steel, which is characterized in that by weight percentage
Including following chemical component:
C:0.048%, Si:0.15%, Mn:1.36%, P:0.005%, S:0.001%, Nb:0.040%, Ti:0.012%,
Cr:0.24%, Cu:0.15%, Ni:0.12%, H:0.00008%, O:0.0012%, N:0.0022%, Pcm:0.14%, it is remaining
Amount is Fe and inevitable impurity.
3. low cost acid-resisting according to claim 1 corrodes X70MS pipe line steel, which is characterized in that by weight percentage
Including following chemical component:
C:0.052%, Si:0.12%, Mn:1.42%, P:0.004%, S:0.001%, Nb:0.042%, Ti:0.016%,
Cr:0.22%, Cu:0.15%, Ni:0.14%, H:0.00007%, O:0.0015%, N:0.0025%, Pcm:0.15%, it is remaining
Amount is Fe and inevitable impurity.
4. low cost acid-resisting according to claim 1 corrodes X70MS pipe line steel, which is characterized in that by weight percentage
Including following chemical component:
C:0.055%, Si:0.18%, Mn:1.46%, P:0.006%, S:0.001%, Nb:0.048%, Ti:0.013%,
Cr:0.27%, Cu:0.27%, Ni:0.19%, H:0.00010%, O:0.0013%, N:0.0030%, Pcm:0.16%, it is remaining
Amount is Fe and inevitable impurity.
5. the preparation method of low cost acid-resisting corrosion X70MS pipe line steel according to any one of claims 1-4, special
Sign is, includes the following steps:
S1, smelting and casting
Smelting process uses KR method desulphurised hot metal and high-quality steel scrap, and LF refining and RH application of vacuum guarantee Cleanliness of Molten Steel, LF essence
Refining carries out slag making using the big quantity of slag, and RH application of vacuum guarantees the molten steel depth vacuum cycle time, carries out Calcium treatment, Ar after vacuum processing
The gas soft blow time is greater than 10min, and field trash is made sufficiently to be denaturalized and float；Whole process protection is poured when sheet billet continuous casting, and using dynamic
Soft reduction technique, to reduce continuous casting billet center segregation；
S2, heating and rolling
1160~1180 DEG C of slab heating temperature, total time inside furnace >=180min, it is ensured that steel billet temperature is uniform；Manufacturing process is heat
Two-stage control progress, all axial rollings are rolled, the first stage is the rolling of austenite recrystallization area, i.e. rough rolling step；Second stage
For the rolling of austenite Unhydrated cement, i.e. finish rolling stage；
When austenite recrystallization area rolls, start rolling temperature is 1160~1180 DEG C, the first percentage pass reduction > 10%, extreme trace
Reduction ratio >=25%, sufficiently to refine original austenite grains；
In the rolling of austenite Unhydrated cement, the rolling in this stage extends austenite, finish rolling start rolling temperature≤970 DEG C, eventually
Rolling temperature is 800~830 DEG C, and finish rolling compression ratio >=3 add up reduction ratio >=75%；
S3, cooling
After controlled rolling, steel band enters ciphering type section cooling region, is cooled to 480 with the cooling velocity of 15~25 DEG C/s
~530 DEG C, finally obtain finished steel.
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| CN201811390685.XA CN109594015A (en) | 2018-11-21 | 2018-11-21 | A kind of low cost acid-resisting corrosion X70MS pipe line steel and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110295320A (en) * | 2019-06-20 | 2019-10-01 | 江阴兴澄特种钢铁有限公司 | A kind of big wall thickness X52MS acid-resistant pipeline steel plate and its manufacturing method of the production of LF-RH refinery practice |
| CN111286668A (en) * | 2020-02-11 | 2020-06-16 | 包头钢铁（集团）有限责任公司 | Low-cost high-low-temperature-toughness rare earth steel for wind power flange and production process thereof |
| CN111748741A (en) * | 2020-06-30 | 2020-10-09 | 武汉钢铁有限公司 | Thick pipeline steel and low compression ratio production process thereof |
| CN112680659A (en) * | 2020-12-04 | 2021-04-20 | 安阳钢铁股份有限公司 | Low-compression-ratio economical X70 pipeline steel and production method thereof |
| CN113943889A (en) * | 2021-09-06 | 2022-01-18 | 包头钢铁（集团）有限责任公司 | Yield strength 450MPa grade anti-H2S corrosion pipeline steel and production method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110295320A (en) * | 2019-06-20 | 2019-10-01 | 江阴兴澄特种钢铁有限公司 | A kind of big wall thickness X52MS acid-resistant pipeline steel plate and its manufacturing method of the production of LF-RH refinery practice |
| CN111286668A (en) * | 2020-02-11 | 2020-06-16 | 包头钢铁（集团）有限责任公司 | Low-cost high-low-temperature-toughness rare earth steel for wind power flange and production process thereof |
| CN111748741A (en) * | 2020-06-30 | 2020-10-09 | 武汉钢铁有限公司 | Thick pipeline steel and low compression ratio production process thereof |
| CN111748741B (en) * | 2020-06-30 | 2022-01-25 | 武汉钢铁有限公司 | Thick pipeline steel and low compression ratio production process thereof |
| CN112680659A (en) * | 2020-12-04 | 2021-04-20 | 安阳钢铁股份有限公司 | Low-compression-ratio economical X70 pipeline steel and production method thereof |
| CN112680659B (en) * | 2020-12-04 | 2022-04-22 | 安阳钢铁股份有限公司 | Low-compression-ratio economical X70 pipeline steel and production method thereof |
| CN113943889A (en) * | 2021-09-06 | 2022-01-18 | 包头钢铁（集团）有限责任公司 | Yield strength 450MPa grade anti-H2S corrosion pipeline steel and production method thereof |
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Application publication date: 20190409 |