CN109680209A - A kind of N80 grade of steel Micro Alloying Oil Tube Steel and its method for preparing oil pipe - Google Patents
A kind of N80 grade of steel Micro Alloying Oil Tube Steel and its method for preparing oil pipe Download PDFInfo
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- CN109680209A CN109680209A CN201811319744.4A CN201811319744A CN109680209A CN 109680209 A CN109680209 A CN 109680209A CN 201811319744 A CN201811319744 A CN 201811319744A CN 109680209 A CN109680209 A CN 109680209A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 112
- 239000010959 steel Substances 0.000 title claims abstract description 112
- 238000005275 alloying Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000001816 cooling Methods 0.000 claims description 21
- 230000008569 process Effects 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000004513 sizing Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 22
- 238000005096 rolling process Methods 0.000 abstract description 9
- 239000013078 crystal Substances 0.000 abstract description 6
- 229910052799 carbon Inorganic materials 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 3
- 238000004873 anchoring Methods 0.000 abstract description 2
- 238000001953 recrystallisation Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 238000009785 tube rolling Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 8
- 238000003303 reheating Methods 0.000 description 7
- 229910001563 bainite Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910001562 pearlite Inorganic materials 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
- B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
- B21B19/04—Rolling basic material of solid, i.e. non-hollow, structure; Piercing, e.g. rotary piercing mills
-
- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The present invention relates to Micro Alloying oil pipe production technology field more particularly to a kind of N80 grade of steel Micro Alloying Oil Tube Steels and its method for preparing oil pipe.Mass percent calculates, including following component: C:0.28-0.35%, Si:0.17-0.37%, Mn:1.40-1.80%, V:0.10-0.14%, Al:0.02-0.04%, N:0.012-0.020%.In this way, the chemical component designed using the new steel grade, complete dynamic recrystallization, is not in mixed crystal phenomenon under the conditions of 1000 DEG C or more tube rollings；Containing alloying elements such as C, V, N, Al in material, the carbonitride of above the average age for marriage V, N are precipitated under high temperature rolling, plays the role of anchoring grain boundary dislocation, refinement crystal grain；Consequently, it may not be necessary to reheat phase-transition crystal grain thinning tissue again under being cooled to Ac1, stretch reducing machine rolling can be directly carried out, finally obtained grain structure size and the uniformity can meet processing performance requirement.
Description
Technical field
The present invention relates to Micro Alloying oil pipe production technology field more particularly to a kind of N80 grade of steel Micro Alloying Oil Tube Steel and its
The method for preparing oil pipe.
Background technique
Currently, traditional production N80 grade of steel Micro Alloying oil pipe, generally selection 36Mn2V, 38Mn2V, 42MnMo7 etc..Mainly
Technical process is: pipe is heated at 1240-1280 DEG C, and pierced shell temperature is controlled in 1150-1200 DEG C, 950-1150 DEG C of company
It rolls, Tuo Banghou hollow forging is cooled to 600 DEG C or less (below Ac1 transformation temperatures), enters back at 880-960 DEG C of austenitizing of reheating furnace
Reason, laggard stretch reducing machine of crossing of coming out of the stove are air-cooled to room temperature；
This process choice high-carbon high-alloy steel grade, high production cost.It has passed through reheating furnace reheating, rhythm of production
Slowly, it reheats steel pipe and there is the mass defects hidden danger such as scuffing, further increase manufacturing cost.Although undergoing secondary reheating, change
Toughness of material has been apt to it, but strength reduction is obvious, stable processing technique is bad.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of N80 grade of steel Micro Alloying Oil Tube Steel and its prepare the side of oil pipe
Method solves the problem of how simplifying the technological process of production, improving production efficiency, reduce manufacturing cost.
The technical scheme to solve the above technical problems is that a kind of N80 grade of steel Micro Alloying Oil Tube Steel, quality percentage
Than calculating, including following component:
C:0.28-0.35%, Si:0.17-0.37%, Mn:1.40-1.80%, V:0.10-0.14%, Al:0.02-
0.04%, N:0.012-0.020%.
Further, mass percent calculates, including following component: C:0.30-0.33%, Si:0.22-0.31%, Mn:
1.53-1.72%, V:0.10-0.12%, Al:0.028-0.038%, N:0.014-0.018%.
Further, mass percent calculates, including following component: C:0.31%, Si:0.26%, Mn:1.6%, V:
0.11%, Al:0.033%, N:0.016%.
A kind of method that N80 grade of steel Micro Alloying Oil Tube Steel prepares oil pipe, including by the N80 grade of steel Micro Alloying oil pipe steel
Pipe made of standby；Specific steps are as follows:
S1: by heating of pipe blank to 1240-1280 DEG C；
S2: perforation processing is carried out to the pipe after heating, perforation treatment process temperature is maintained at 1150-1200 DEG C, obtains
Hollow billet；
S3: hollow billet carries out sizing processing by stretch reducing machine group:
S4: the roll forming steel pipe under 750-850 DEG C of environment；
S5: finally will forming steel pipe cooling.
Further, in the step 5, by forming steel pipe cooling temperature to 600-650 DEG C.
Further, cooling that water cooling is carried out using high-pressure water-ring in the step 5.
Further, the high-pressure water-ring discharge pressure is greater than 10MPa.
The present invention provides a kind of N80 grade of steel Micro Alloying Oil Tube Steel, and mass percent calculates, including following component:
C:0.28-0.35%, Si:0.17-0.37%, Mn:1.40-1.80%, V:0.10-0.14%, Al:0.02-
0.04%, N:0.012-0.020%.
In this way, the chemical component designed using the new steel grade, complete dynamic recrystallization under the conditions of 1000 DEG C or more tube rollings,
It is not in mixed crystal phenomenon；Containing alloying elements such as C, V, N, Al in material, the carbon nitridation of above the average age for marriage V, N are precipitated under high temperature rolling
Object plays the role of anchoring grain boundary dislocation, refinement crystal grain；Consequently, it may not be necessary to which it is brilliant to reheat the refinement of phase transformation again under being cooled to Ac1
Grain tissue, can directly carry out stretch reducing machine rolling, finally obtained grain structure size and the uniformity can meet processing performance
It is required that.
A kind of method that N80 grade of steel Micro Alloying Oil Tube Steel prepares oil pipe, including by the N80 grade of steel Micro Alloying oil pipe steel
Pipe made of standby；Specific steps are as follows:
By heating of pipe blank to 1240-1280 DEG C；Perforation processing is carried out to the pipe after heating, perforation treatment process temperature is protected
It holds at 1150-1200 DEG C, obtains hollow billet；Hollow billet carries out sizing processing by stretch reducing machine group:: it is rolled under 750-850 DEG C of environment
Shape steel pipe；It finally will forming steel pipe cooling.
In this way, the pearlite and bainite structure of rational proportion are obtained using rapid cooling after the design of reasonable ingredient and finish to gauge,
High performance oil pipe can be produced in heating furnace without offline Tempering and Quenching and online mistake；Steel after guarantee high temperature rolling
Pipe is directly entered stretch reducing machine rolling without reheating furnace reaustenitizing, and then online rapid cooling, greatly simplifies production work
Skill process improves production efficiency, reduces manufacturing cost.It has the advantage, that in terms of existing technologies and greatly simplifies life
Production. art process improves production efficiency, reduces manufacturing cost.
Detailed description of the invention
Fig. 1 is the production procedure schematic diagram for the method that a kind of N80 grade of steel Micro Alloying Oil Tube Steel of the present invention prepares oil pipe；
Fig. 2 is the traditional steel grade of the present invention and passes through reheating furnace, rolled steel tube microstructure schematic diagram；
Fig. 3 is the online rapid cooling of technical solution of the present invention Direct Rolling, rolled steel tube microstructure schematic diagram.
Specific embodiment
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the invention.
Comparative example 1:
A kind of N80 grade of steel Micro Alloying Oil Tube Steel, mass percent calculates, including following component:
C:0.38%, Si:0.28%, Mn:1.42%, V:0.14%, Al:0.010%, N:0.008%, surplus Fe.
Comparative example 2:
A kind of N80 grade of steel Micro Alloying Oil Tube Steel, mass percent calculates, including following component:
C:0.37%, Si:0.27%, Mn:1.40%, V:0.16%, Al:0.012%, N:0.008%, surplus Fe.
Comparative example 3:
A kind of N80 grade of steel Micro Alloying Oil Tube Steel, mass percent calculates, including following component:
C:0.39%, Si:0.28%, Mn:1.38%, V:0.15%, Al:0.015%, N:0.007%, surplus Fe.
Comparative example 4:
A kind of N80 grade of steel Micro Alloying Oil Tube Steel, mass percent calculates, including following component:
C:0.37%, Si:0.27%, Mn:1.39%, V:0.14%, Al:0.012%, N:0.006%, surplus Fe.
Comparative example 5:
A kind of N80 grade of steel Micro Alloying Oil Tube Steel, mass percent calculates, including following component:
C:0.38%, Si:0.30%, Mn:1.40%, V:0.16%, Al:0.016%, N:0.007%, surplus Fe.
Comparative example 6:
A kind of N80 grade of steel Micro Alloying Oil Tube Steel, mass percent calculates, including following component:
C:0.38%, Si:0.27%, Mn:1.36%, V:0.16%, Al:0.014%, N:0.006%, surplus Fe.
Comparative example 7:
A kind of N80 grade of steel Micro Alloying Oil Tube Steel, mass percent calculates, including following component:
C:0.39%, Si:0.29%, Mn:1.42%, V:0.17%, Al:0.012%, N:0.008%, surplus Fe.
Embodiment 1:
A kind of N80 grade of steel Micro Alloying Oil Tube Steel, mass percent calculates, including following component:
C:0.28%, Si:0.17%, Mn:1.40%, V:0.10%, Al:0.02%, N:0.012%, surplus Fe.
Embodiment 2:
A kind of N80 grade of steel Micro Alloying Oil Tube Steel, mass percent calculates, including following component:
C:0.30%, Si:0.22%, Mn:1.53%, V:0.10%, Al:0.028%, N:0.014%, surplus Fe.
Embodiment 3:
A kind of N80 grade of steel Micro Alloying Oil Tube Steel, mass percent calculates, including following component:
C:0.31%, Si:0.26%, Mn:1.60%, V:0.11%, Al:0.033%, N:0.016%, surplus Fe.
Embodiment 4:
A kind of N80 grade of steel Micro Alloying Oil Tube Steel, mass percent calculates, including following component:
C:0.32%, Si:0.26%, Mn:1.72%, V:0.10%, Al:0.035%, N:0.016%, surplus Fe.
Embodiment 5:
A kind of N80 grade of steel Micro Alloying Oil Tube Steel, mass percent calculates, including following component:
C:0.30%, Si:0.28%, Mn:1.70%, V:0.10%, Al:0.035%, N:0.014%, surplus Fe.
Embodiment 6:
A kind of N80 grade of steel Micro Alloying Oil Tube Steel, mass percent calculates, including following component:
C:0.32%, Si:0.26%, Mn:1.73%, V:0.12%, Al:0.032%, N:0.016%, surplus Fe.
Embodiment 7:
A kind of N80 grade of steel Micro Alloying Oil Tube Steel, mass percent calculates, including following component:
C:0.31%, Si:0.26%, Mn:1.65%, V:0.10%, Al:0.033%, N:0.017%, surplus Fe.
Embodiment 8:
A kind of N80 grade of steel Micro Alloying Oil Tube Steel, mass percent calculates, including following component:
C:0.30%, Si:0.28%, Mn:1.70%, V:0.10%, Al:0.035%, N:0.016%, surplus Fe.
Embodiment 9:
A kind of N80 grade of steel Micro Alloying Oil Tube Steel, mass percent calculates, including following component:
C:0.32%, Si:0.29%, Mn:1.65%, V:0.11%, Al:0.034%, N:0.016%, surplus Fe.
Embodiment 10:
A kind of N80 grade of steel Micro Alloying Oil Tube Steel, mass percent calculates, including following component:
C:0.31%, Si:0.26%, Mn:1.60%, V:0.10%, Al:0.032%, N:0.015%, surplus Fe.
Embodiment 11:
A kind of N80 grade of steel Micro Alloying Oil Tube Steel, mass percent calculates, including following component:
C:0.33%, Si:0.31%, Mn:1.72%, V:0.12%, Al:0.038%, N:0.018%, surplus Fe.
Embodiment 12:
A kind of N80 grade of steel Micro Alloying Oil Tube Steel, mass percent calculates, including following component:
C:0.35%, Si:0.37%, Mn:1.80%, V:0.14%, Al:0.04%, N:0.020%, surplus Fe.
Comparative example and the comparison of embodiment constituent content are referring to table, and see Table 1 for details:
Table 1
Traditional handicraft and technical scheme mechanical property effect comparison table
Table 2
As can be seen from Table 2, the tensile strength of rolled steel tube is greater than 760Mpa, and yield strength exists using traditional steel grade technique
Between 545-650MPa, fluctuation is greater than 100MPa, and ballistic work is between 25-45J, and there are unqualified phenomenons for yield strength.And it adopts
It is greater than 800MPa with the tensile strength of new steel grade new process, rolled steel tube, yield strength between 600-650, only have by fluctuation
50MPa, ballistic work 25-35J, performance stabilization are all satisfied API standard N80-1 steel level oil conduit performance requirement.
As shown in Figure 1-Figure 3, the present invention provides a kind of method that N80 grade of steel Micro Alloying Oil Tube Steel prepares oil pipe, including by
The pipe that the N80 grade of steel Micro Alloying Oil Tube Steel is prepared；Specific steps are as follows:
By heating of pipe blank to 1240-1280 DEG C；Perforation processing is carried out to the pipe after heating, perforation treatment process temperature is protected
It holds at 1150-1200 DEG C, obtains hollow billet；Hollow billet carries out sizing processing by stretch reducing machine group:: it is rolled under 750-850 DEG C of environment
Shape steel pipe；It finally will forming steel pipe cooling.
In this way, the pearlite and bainite structure of rational proportion are obtained using rapid cooling after the design of reasonable ingredient and finish to gauge,
High performance oil pipe can be produced in heating furnace without offline Tempering and Quenching and online mistake；Steel after guarantee high temperature rolling
Pipe is directly entered stretch reducing machine rolling without reheating furnace reaustenitizing, and then online rapid cooling, greatly simplifies production work
Skill process improves production efficiency, reduces manufacturing cost.It has the advantage, that in terms of existing technologies and greatly simplifies life
Production. art process improves production efficiency, reduces manufacturing cost.
The method that N80 grade of steel Micro Alloying Oil Tube Steel of the invention prepares oil pipe describes in front as shown in Figure 1-Figure 3
On the basis of technical solution it may also is that in the step 5, by forming steel pipe cooling temperature to 600-650 DEG C.In this way, this skill
Art scheme stretch reducing machine finishing temperature control between 750-850 DEG C, instantaneous cooling (cooling velocity >=100 DEG C/s) is extremely after finish to gauge
600-650 DEG C of temperature range can form the tiny pearlite of crystal grain and a small amount of bainite structure, meet N80 high-strength and high ductility skill
Art requirement.
The method that N80 grade of steel Micro Alloying Oil Tube Steel of the invention prepares oil pipe describes in front as shown in Figure 1-Figure 3
It is cooling that water cooling is carried out using high-pressure water-ring on the basis of technical solution it may also is that in the step 5.Further preferred skill
Art scheme is: the high-pressure water-ring discharge pressure is greater than 10MPa.It is each by front end installation 3-5 in stretch reducing machine end product rack
High-pressure water-ring, pressure are greater than 10MPa.When steel pipe comes out from stretch reducing machine end product rack, moment is from High-temperature cooling to 600-650
℃。
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of N80 grade of steel Micro Alloying Oil Tube Steel, it is characterised in that: mass percent calculates, including following component:
C:0.28-0.35%, Si:0.17-0.37%, Mn:1.40-1.80%, V:0.10-0.14%, Al:0.02-0.04%,
N:0.012-0.020%.
2. N80 grade of steel Micro Alloying Oil Tube Steel according to claim 1, it is characterised in that: mass percent calculates, including such as
Lower component: C:0.30-0.33%, Si:0.22-0.31%, Mn:1.53-1.72%, V:0.10-0.12%, Al:0.028-
0.038%, N:0.014-0.018%.
3. N80 grade of steel Micro Alloying Oil Tube Steel according to claim 2, it is characterised in that: mass percent calculates, including such as
Lower component: C:0.31%, Si:0.26%, Mn:1.6%, V:0.11%, Al:0.033%, N:0.016%.
4. a kind of method that N80 grade of steel Micro Alloying Oil Tube Steel prepares oil pipe, it is characterised in that: including any by claim 1-3
The pipe that one N80 grade of steel Micro Alloying Oil Tube Steel is prepared；Specific steps are as follows:
S1: by heating of pipe blank to 1240-1280 DEG C；
S2: perforation processing is carried out to the pipe after heating, perforation treatment process temperature is maintained at 1150-1200 DEG C, obtains hollow billet；
S3: hollow billet carries out sizing processing by stretch reducing machine group:
S4: the roll forming steel pipe under 750-850 DEG C of environment；
S5: finally will forming steel pipe cooling.
5. the method that N80 grade of steel Micro Alloying Oil Tube Steel according to claim 4 prepares oil pipe, it is characterised in that: the step
In rapid 5, by forming steel pipe cooling temperature to 600-650 DEG C.
6. the method that N80 grade of steel Micro Alloying Oil Tube Steel according to claim 4 prepares oil pipe, it is characterised in that: the step
It is cooling that water cooling is carried out using high-pressure water-ring in rapid 5.
7. the method that N80 grade of steel Micro Alloying Oil Tube Steel according to claim 6 prepares oil pipe, it is characterised in that: the height
Water ring discharge pressure is pressed to be greater than 10MPa.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811319744.4A CN109680209A (en) | 2018-11-07 | 2018-11-07 | A kind of N80 grade of steel Micro Alloying Oil Tube Steel and its method for preparing oil pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811319744.4A CN109680209A (en) | 2018-11-07 | 2018-11-07 | A kind of N80 grade of steel Micro Alloying Oil Tube Steel and its method for preparing oil pipe |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1218115A (en) * | 1997-11-24 | 1999-06-02 | 武汉钢铁(集团)公司 | Low carbon and super low carbon copper and boron bainite steel |
| JP2006265668A (en) * | 2005-03-25 | 2006-10-05 | Sumitomo Metal Ind Ltd | Seamless steel tube for oil well |
| CN1932065A (en) * | 2005-09-13 | 2007-03-21 | 鞍钢股份有限公司 | Weldable high-strength microalloyed medium carbon steel oil well pipe and its making process |
| JP2008202128A (en) * | 2007-02-22 | 2008-09-04 | Nippon Steel Corp | Oil well electric resistance welded pipe for expansion having excellent expansion performance and corrosion resistance, and method for manufacturing the same |
| CN102703838A (en) * | 2012-05-28 | 2012-10-03 | 无锡西姆莱斯石油专用管制造有限公司 | Production process for PSL-2 grade non-tempered N80 steel grade oil casing pipes |
-
2018
- 2018-11-07 CN CN201811319744.4A patent/CN109680209A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1218115A (en) * | 1997-11-24 | 1999-06-02 | 武汉钢铁(集团)公司 | Low carbon and super low carbon copper and boron bainite steel |
| JP2006265668A (en) * | 2005-03-25 | 2006-10-05 | Sumitomo Metal Ind Ltd | Seamless steel tube for oil well |
| CN1932065A (en) * | 2005-09-13 | 2007-03-21 | 鞍钢股份有限公司 | Weldable high-strength microalloyed medium carbon steel oil well pipe and its making process |
| JP2008202128A (en) * | 2007-02-22 | 2008-09-04 | Nippon Steel Corp | Oil well electric resistance welded pipe for expansion having excellent expansion performance and corrosion resistance, and method for manufacturing the same |
| CN102703838A (en) * | 2012-05-28 | 2012-10-03 | 无锡西姆莱斯石油专用管制造有限公司 | Production process for PSL-2 grade non-tempered N80 steel grade oil casing pipes |
Non-Patent Citations (1)
| Title |
|---|
| 《电厂金属化学分析》编写组: "《电厂金属化学分析》", 31 December 1977, 北京：水利电力出版社 * |
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