CN107760988A - The production method of low cost S EW oil casing steels - Google Patents
The production method of low cost S EW oil casing steels Download PDFInfo
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- CN107760988A CN107760988A CN201710881840.7A CN201710881840A CN107760988A CN 107760988 A CN107760988 A CN 107760988A CN 201710881840 A CN201710881840 A CN 201710881840A CN 107760988 A CN107760988 A CN 107760988A
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/002—Resistance welding; Severing by resistance heating specially adapted for particular articles or work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
-
- 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
Abstract
The invention discloses a kind of low cost S EW oil casing steels（TG26‑1、TG27）Production method, it include steel-making continuous casting, roll, batch, uncoiling, tubulation and heat treatment step, the steel-making continuous casting process：The weight percentage of gained strand composition is：C 0.24%~0.29%, Si 0.10%~0.30%, Mn 1.20%~1.40%, P≤0.013%, S≤0.004%, Als 0.010%~0.055%, Cr 0.40%~0.50%, surplus are Fe and inevitable impurity.This method, by not adding the composition design of microalloy noble element using high C, Mn in production, reduces molten steel cost of alloy first with the smelting of the narrow composition of molten steel；Then product strength ensure that by cooling controlling and rolling controlling process and Technology for Heating Processing again；So as to obtain the logical uniform microstructure of volume, reach the purpose of mechanical property uniformity；The mechanical property of products obtained therefrom is increased substantially, and substantially increases product strength grade, and bigger lifting has been obtained to the security performance of petroleum casing pipe industry, has the characteristics that product cost is low, high comprehensive performance.
Description
Technical field
The present invention relates to a kind of oil casing steel, especially a kind of low cost S EW oil casing steels（TG26-1、TG27）'s
Production method.
Background technology
With the development of China Petroleum, substantial amounts of oil casing steel will be consumed every year.It is reported that 2010 consume
2250000 tons, 3,000,000 tons are consumed within 2015, has just reached within 2016 3500000 tons, petroleum industry requires production Hi-grade steel, corrosion resistant
Erosion, processability require that relatively low yield tensile ratio is following development trend of pipe line steel simultaneously, especially for Hi-grade steel N80,
P110 and the oil well casing of special screw thread requirement, it is most of at present to depend on import.In the state of high oil price on the international market,
A part of old well repair needs to start.Due to petroleum casing pipe in underground because corrosion causes perforation or because being pressed by the earth's crust
Power produces rupture, and this just needs a kind of special material to be sent to underground repairing leak or crackle, so that oil well resumes production, at present
These special materials need relatively low yield strength, higher plasticity, relatively low yield tensile ratio etc..Therefore there is an urgent need to find by people
A kind of cost is relatively low and has the steel of similar mechanical property.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of production of the low cost S EW oil casing steels of good combination property
Method.
In order to solve the above technical problems, the technical solution used in the present invention is：The steel smelting-continuous casting process：Gained is cast
Base predominant quantity percentage composition is：C 0.24%~0.29%, Si 0.10%~0.30%, Mn 1.20%~1.40%, P≤
0.013%, S≤0.004%, Als 0.010%~0.055%；The heating process：Strand soaking temperature is 1200 DEG C~1240
DEG C, soaking time is 180min~240min；The rolling process：Roughing final pass rolling outlet temperature be 1040 DEG C~
1065 DEG C, the type of cooling is that leading portion concentrates cooling；The coiling process：Coiling temperature is 580 DEG C~620 DEG C；The tubulation work
Sequence：Strip is passed through into 820~860 DEG C of heat tube reducing packaged tube mother metal；The heat treatment step：Described sleeve pipe mother metal passes through 930
~970 DEG C of glowing furnaces are quenched, then are tempered by 630~650 DEG C of tempering furnaces, are come out of the stove cold after 530~550 DEG C of alignings
But to room temperature.
In steel smelting-continuous casting process strand composition of the present invention, C 0.26~0.28%, Mn 1.30%, S≤0.003%.
Also contain Cr 0.40%~0.50% in steel smelting-continuous casting process strand composition of the present invention.
In rolling process of the present invention, finish rolling start rolling temperature scope is 920 DEG C~960 DEG C.
In heat treatment step of the present invention, the soaking time of quenching is 40~60min, the time inside furnace of tempering for 70~
90min。
It is using beneficial effect caused by above-mentioned technical proposal：The present invention is by using SEW techniques, i.e. alternating-current resistance
Weldering welding（HFW）+ hot tensile strength tube reducing+siphunculus Technology for Heating Processing is produced, and in composition design, alloy is removed using high C, Mn
Change mentality of designing, but C content is too high, is also easy to produce banded segregation, increases hardening break and temper brittleness tendency, to the low temperature of grade of steel
Toughness and welding corrosion resistance are unfavorable, by comparing steel plate stretching performance before being heat-treated performance C, Mn solution strengthening mechanism and heat treatment
It is significantly improved, low-temperature flexibility increases, steel plate residual stress substantially reduces, it is achieved thereby that narrow composition low cost S EW
Oil casing steel（N80、P110）The production of combination property.
It is valuable not add microalloy first with the smelting of the narrow composition of molten steel by production using high C, Mn by the present invention
The composition design of element, reduce molten steel cost of alloy；Then ensure that again by cooling controlling and rolling controlling process and Technology for Heating Processing
Product strength；So as to obtain the logical uniform microstructure of volume, reach the purpose of mechanical property uniformity.
The present invention realizes narrow composition low cost S EW oil casing steels（N80、P110）The production of strip combination property, visit
Rope has gone out by low cost process, and using high C, Mn removal alloying mentality of designing, strip is again by using SEW techniques, the power of product
Learn performance to be increased substantially, substantially increase product strength grade, the security performance of petroleum casing pipe industry is obtained
Bigger lifting, have the characteristics that product cost is low, high comprehensive performance.
Brief description of the drawings
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
Fig. 1 is the metallographic structure figure of the gained hot rolled strip of embodiment 1；
Fig. 2 is the metallographic structure figure of the gained petroleum casing pipe of embodiment 1；
Fig. 3 is the metallographic structure figure of the gained hot rolled strip of embodiment 2；
Fig. 4 is the metallographic structure figure of the gained petroleum casing pipe of embodiment 2；
Fig. 5 is the metallographic structure figure of the gained hot rolled strip of embodiment 3；
Fig. 6 is the metallographic structure figure of the gained petroleum casing pipe of embodiment 3；
Fig. 7 is the metallographic structure figure of the gained hot rolled strip of embodiment 4；
Fig. 8 is the metallographic structure figure of the gained petroleum casing pipe of embodiment 4；
Fig. 9 is the metallographic structure figure of the gained hot rolled strip of embodiment 5；
Figure 10 is the metallographic structure figure of the gained petroleum casing pipe of embodiment 5；
Figure 11 is the metallographic structure figure of the gained hot rolled strip of embodiment 6；
Figure 12 is the metallographic structure figure of the gained petroleum casing pipe of embodiment 6.
Embodiment
This low cost S EW oil casing steels（TG26-1、TG27）Production method use SEW techniques（HFW+ hot tensile strengths subtract
Footpath+siphunculus Technology for Heating Processing）, including steel smelting-continuous casting, roll, batch, uncoiling, tubulation and heat treatment step, the work of each operation
Skill is as described below：（1）Steel smelting-continuous casting process：The weight percentage of gained TG26-1 steel strand compositions is：C 0.24%~
0.29%, Si 0.10%~0.30%, Mn 1.20%~1.40%, P≤0.013%, S≤0.004%, Als 0.010%~0.055%,
Surplus is Fe and inevitable impurity；Also contain Cr 0.40%~0.50% in the strand composition of another gained TG27 steel.
（2）Heating process：Strand soaking temperature is 1200 DEG C~1240 DEG C, and soaking time is 180min~240min.
（3）Rolling process：The final pass rolling outlet temperature of roughing is 1040 DEG C~1065 DEG C, and finish rolling start rolling temperature is
920 DEG C~960 DEG C, partial, re-crystallization warm area rolls between avoiding 1000~1040 DEG C；The type of cooling is that leading portion concentrates cooling.
（4）Coiling process：Steel plate is curled into steel band, coiling temperature is 580 DEG C~620 DEG C.
（5）Uncoiling process：Steel belt decoiling slitting, obtain band steel board.
（6）Tubulation process：HFW will be carried out with steel board（High-frequency resistance welding (HFRW) welds）Tubulation, pass through 820~860 DEG C of heat
Tube reducing packaged tube mother metal.
（7）Heat treatment step：Described sleeve pipe mother metal is quenched by 930~970 DEG C of glowing furnaces, the soaking time of quenching
For 40~60min；It is tempered again by 630~650 DEG C of tempering furnaces, the time inside furnace of tempering is 70~90min；After coming out of the stove
530~550 DEG C of alignings, are subsequently cooled to room temperature, you can obtain N80, P110 petroleum casing pipe.
Embodiment 1：This low cost S EW oil casing steels TG26-1 production method uses following concrete technologies.
Steel smelting-continuous casting process：The weight percentage of gained strand composition is：C 0.26%, Si 0.25%, Mn 1.30%,
P 0.008%, S 0.003%, Als 0.035%, surplus are Fe and inevitable impurity.
（2）Heating, rolling and coiling process：Slab heating temperature is 1220 DEG C, heat time 200min.Roughing is most
Passes temperature is 1050 DEG C afterwards, and finish rolling start rolling temperature is 940 DEG C；The type of cooling is that leading portion concentrates cooling.By coiler plate
Into 8.9mm × 1815mm steel bands, coiling temperature is 600 DEG C.The performance of gained steel band：Yield strength 512MPa；Tensile strength
689MPa；Elongation percentage 32.0%；Ballistic work 68J.The grain structure of gained steel band is observed, shown in Fig. 1, its grain structure
Size is led to volume and is evenly distributed, and structure is consistent, and no mixed grain structure and segregation occur.
（3）Uncoiling, tubulation and heat treatment step：Steel belt decoiling slitting, HFW tubulations are then carried out, subtracted by 840 DEG C of heat
Footpath packaged tube mother metal.Described sleeve pipe mother metal is quenched by 950 DEG C of glowing furnaces, and the soaking time of quenching is 45min；Pass through again
650 DEG C of tempering furnaces are tempered, and the time inside furnace of tempering is 80min；In 550 DEG C of alignings after coming out of the stove, room temperature is subsequently cooled to, i.e.,
It can obtain petroleum casing pipe.The performance of gained petroleum casing pipe：Yield strength 697MPa；Tensile strength 793MPa；Elongation percentage 25.3%；
Ballistic work 78J；Meet N80 petroleum casing pipe grade of steel demands.The grain structure of gained petroleum casing pipe is observed, it is brilliant shown in Fig. 2
Grain tissue is normal, is evenly distributed, structure is consistent.
Embodiment 2：This low cost S EW oil casing steels TG27 production method uses following concrete technologies.
（1）Steel smelting-continuous casting process：The weight percentage of gained strand composition is：C 0.27%, Si 0.18%, Mn
1.30%, P 0.010%, S 0.002%, Als 0.042%, Cr 0.45%, surplus are Fe and inevitable impurity.
（2）Heating, rolling and coiling process：Slab heating temperature is 1230 DEG C, heat time 220min.Roughing is most
Passes temperature is 1055 DEG C afterwards, and finish rolling start rolling temperature is 950 DEG C；The type of cooling is that leading portion concentrates cooling.By coiler plate
Into 8.9mm × 1815mm steel bands, coiling temperature is 600 DEG C.The performance of gained steel band：Yield strength 535MPa；Tensile strength
730MPa；Elongation percentage 32.0%；Ballistic work 92J.The grain structure of gained steel band is observed, shown in Fig. 3, its grain structure
Size is led to volume and is evenly distributed, and structure is consistent, and no mixed grain structure and segregation occur.
（3）Uncoiling, tubulation and heat treatment step：Steel belt decoiling slitting, HFW tubulations are then carried out, subtracted by 850 DEG C of heat
Footpath packaged tube mother metal.Described sleeve pipe mother metal is quenched by 950 DEG C of glowing furnaces, and the soaking time of quenching is 50min；Pass through again
645 DEG C of tempering furnaces are tempered, and the time inside furnace of tempering is 80min；In 545 DEG C of alignings after coming out of the stove, room temperature is subsequently cooled to, i.e.,
It can obtain petroleum casing pipe.The performance of gained petroleum casing pipe：Yield strength 892MPa；Tensile strength 951MPa；Elongation percentage 24.5%；
Ballistic work 96.5J；Meet P110 petroleum casing pipe grade of steel demands.The grain structure of gained petroleum casing pipe is observed, Fig. 4 institutes
Show, grain structure is normal, is evenly distributed, and structure is consistent.
Embodiment 3：This low cost S EW oil casing steels TG26-1 production method uses following concrete technologies.
（1）Steel smelting-continuous casting process：The weight percentage of gained strand composition is：C 0.28%, Si 0.15%, Mn
1.30%, P 0.013%, S 0.003%, Als 0.055%, surplus are Fe and inevitable impurity.
（2）Heating, rolling and coiling process：Slab heating temperature is 1210 DEG C, heat time 230min.Roughing is most
Passes temperature is 1050 DEG C afterwards, and finish rolling start rolling temperature is 930 DEG C；The type of cooling is that leading portion concentrates cooling.By coiler plate
Into steel band, coiling temperature is 590 DEG C.The performance of gained steel band：Yield strength 496MPa；Tensile strength 692MPa；Elongation percentage
31.5%；Ballistic work 65J.The grain structure of gained steel band is observed, shown in Fig. 5, the logical volume distribution of its grain structure size is equal
Even, structure is consistent, and no mixed grain structure and segregation occur.
（3）Uncoiling, tubulation and heat treatment step：Steel belt decoiling slitting, HFW tubulations are then carried out, subtracted by 830 DEG C of heat
Footpath packaged tube mother metal.Described sleeve pipe mother metal is quenched by 970 DEG C of glowing furnaces, and the soaking time of quenching is 48min；Pass through again
640 DEG C of tempering furnaces are tempered, and the time inside furnace of tempering is 80min；In 550 DEG C of alignings after coming out of the stove, room temperature is subsequently cooled to, i.e.,
It can obtain petroleum casing pipe.The performance of gained petroleum casing pipe：Yield strength 703MPa；Tensile strength 810MPa；Elongation percentage 27.6%；
Ballistic work 78J；Meet N80 petroleum casing pipe grade of steel demands.Meet N80 petroleum casing pipe grade of steel demands.To the crystalline substance of gained petroleum casing pipe
Grain tissue is observed, and shown in Fig. 6, grain structure is normal, is evenly distributed, and structure is consistent.
Embodiment 4：This low cost S EW oil casing steels TG27 production method uses following concrete technologies.
（1）Steel smelting-continuous casting process：The weight percentage of gained strand composition is：C 0.24%, Si 0.19%, Mn
1.20%, P 0.009%, S 0.004%, Als 0.017%, Cr 0.40%, surplus are Fe and inevitable impurity.
（2）Heating, rolling and coiling process：Slab heating temperature is 1200 DEG C, heat time 240min.Roughing is most
Passes temperature is 1040 DEG C afterwards, and finish rolling start rolling temperature is 920 DEG C；The type of cooling is that leading portion concentrates cooling.By coiler plate
Into steel band, coiling temperature is 580 DEG C.The performance of gained steel band：Yield strength 496MPa；Tensile strength 715MPa；Elongation percentage
32%；Ballistic work 76J.The grain structure of gained steel band is observed, shown in Fig. 7, the logical volume distribution of its grain structure size is equal
Even, structure is consistent, and no mixed grain structure and segregation occur.
（3）Uncoiling, tubulation and heat treatment step：Steel belt decoiling slitting, HFW tubulations are then carried out, subtracted by 830 DEG C of heat
Footpath packaged tube mother metal.Described sleeve pipe mother metal is quenched by 960 DEG C of glowing furnaces, and the soaking time of quenching is 50min；Pass through again
650 DEG C of tempering furnaces are tempered, and the time inside furnace of tempering is 90min；In 530 DEG C of alignings after coming out of the stove, room temperature is subsequently cooled to, i.e.,
It can obtain petroleum casing pipe.The performance of gained petroleum casing pipe：Yield strength 893MPa；Tensile strength 948MPa；Elongation percentage 24%；Punching
Hit work(89J；Meet P110 petroleum casing pipe grade of steel demands.The grain structure of gained petroleum casing pipe is observed, it is brilliant shown in Fig. 8
Grain tissue is normal, is evenly distributed, structure is consistent.
Embodiment 5：This low cost S EW oil casing steels TG26-1 production method uses following concrete technologies.
（1）Steel smelting-continuous casting process：The weight percentage of gained strand composition is：C 0.29%, Si 0.10%, Mn
1.28%, P 0.007%, S 0.002%, Als 0.010%, surplus are Fe and inevitable impurity.
（2）Heating, rolling and coiling process：Slab heating temperature is 1240 DEG C, heat time 190min.Roughing is most
Passes temperature is 1065 DEG C afterwards, and finish rolling start rolling temperature is 960 DEG C；The type of cooling is that leading portion concentrates cooling.By coiler plate
Into steel band, coiling temperature is 610 DEG C.The performance of gained steel band：Yield strength 503MPa；Tensile strength 712MPa；Elongation percentage
35%；Ballistic work 68J.The grain structure of gained steel band is observed, shown in Fig. 9, the logical volume distribution of its grain structure size is equal
Even, structure is consistent, and no mixed grain structure and segregation occur.
（3）Uncoiling, tubulation and heat treatment step：Steel belt decoiling slitting, HFW tubulations are then carried out, subtracted by 820 DEG C of heat
Footpath packaged tube mother metal.Described sleeve pipe mother metal is quenched by 940 DEG C of glowing furnaces, and the soaking time of quenching is 60min；Pass through again
630 DEG C of tempering furnaces are tempered, and the time inside furnace of tempering is 85min；In 540 DEG C of alignings after coming out of the stove, room temperature is subsequently cooled to, i.e.,
It can obtain petroleum casing pipe.The performance of gained petroleum casing pipe：Yield strength 705MPa；Tensile strength 789MPa；Elongation percentage 24%；Punching
Hit work(76J；Meet N80 petroleum casing pipe grade of steel demands.The grain structure of gained petroleum casing pipe is observed, it is brilliant shown in Figure 10
Grain tissue is normal, is evenly distributed, structure is consistent.
Embodiment 6：This low cost S EW oil casing steels TG27 production method uses following concrete technologies.
（1）Steel smelting-continuous casting process：The weight percentage of gained strand composition is：C 0.27%, Si 0.30%, Mn
1.40%, P 0.011%, S 0.003%, Als 0.028%, Cr 0.50%, surplus are Fe and inevitable impurity.
（2）Heating, rolling and coiling process：Slab heating temperature is 1220 DEG C, heat time 180min.Roughing is most
Passes temperature is 1060 DEG C afterwards, and finish rolling start rolling temperature is 940 DEG C；The type of cooling is that leading portion concentrates cooling.By coiler plate
Into steel band, coiling temperature is 620 DEG C.The performance of gained steel band：Yield strength 498MPa；Tensile strength 709MPa；Elongation percentage
32%；Ballistic work 75J.The grain structure of gained steel band is observed, shown in Figure 11, the logical volume distribution of its grain structure size is equal
Even, structure is consistent, and no mixed grain structure and segregation occur.
（3）Uncoiling, tubulation and heat treatment step：Steel belt decoiling slitting, HFW tubulations are then carried out, subtracted by 860 DEG C of heat
Footpath packaged tube mother metal.Described sleeve pipe mother metal is quenched by 930 DEG C of glowing furnaces, and the soaking time of quenching is 40min；Pass through again
640 DEG C of tempering furnaces are tempered, and the time inside furnace of tempering is 70min；In 530 DEG C of alignings after coming out of the stove, room temperature is subsequently cooled to, i.e.,
It can obtain petroleum casing pipe.The performance of gained petroleum casing pipe：Yield strength 895MPa；Tensile strength 962MPa；Elongation percentage 24%；Punching
Hit work(97J；Meet P110 petroleum casing pipe grade of steel demands.The grain structure of gained petroleum casing pipe is observed, it is brilliant shown in Figure 12
Grain tissue is normal, is evenly distributed, structure is consistent.
Claims (5)
1. a kind of production method of low cost S EW oil casing steels, it include steel smelting-continuous casting, roll, batch, uncoiling, tubulation and
Heat treatment step, it is characterised in that the steel smelting-continuous casting process：Gained strand predominant quantity percentage composition is：C
0.24%~0.29%, Si 0.10%~0.30%, Mn 1.20%~1.40%, P≤0.013%, S≤0.004%, Als 0.010%~
0.055%；
The heating process：Strand soaking temperature is 1200 DEG C~1240 DEG C, and soaking time is 180min~240min；
The rolling process：The final pass rolling outlet temperature of roughing is 1040 DEG C~1065 DEG C, and the type of cooling is leading portion collection
Middle cooling；
The coiling process：Coiling temperature is 580 DEG C~620 DEG C；
The tubulation process：Strip is passed through into 820~860 DEG C of heat tube reducing packaged tube mother metal；
The heat treatment step：Described sleeve pipe mother metal is quenched by 930~970 DEG C of glowing furnaces, then passes through 630~650 DEG C
Tempering furnace is tempered, and is come out of the stove and is cooled to room temperature after 530~550 DEG C of alignings.
2. the production method of low cost S EW oil casing steels according to claim 1, it is characterised in that：Steel-making-the company
In foundry work sequence strand composition, C 0.26~0.28%, Mn 1.30%, S≤0.003%.
3. low cost S EW oil casing steels TG27 according to claim 1 production method, it is characterised in that：The refining
In steel-continuous casting working procedure strand composition in addition to meeting right 1, separately also contain Cr 0.40%~0.50%.
4. the production method of low cost S EW oil casing steels according to claim 1, it is characterised in that：The rolling work
In sequence, finish rolling start rolling temperature scope is 920 DEG C~960 DEG C.
5. the production method of the low cost S EW oil casing steels according to claim 1-4 any one, it is characterised in that：
In the heat treatment step, the soaking time of quenching is 40~60min, and the time inside furnace of tempering is 70~90min.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109023045A (en) * | 2018-08-02 | 2018-12-18 | 邯郸钢铁集团有限责任公司 | A kind of highly resistance H2The production method of S corrosion oil well casing J55 |
| CN109207851A (en) * | 2018-09-28 | 2019-01-15 | 宝山钢铁股份有限公司 | A kind of ultra-high strength steel plate and its manufacturing method |
| CN112553535A (en) * | 2020-12-16 | 2021-03-26 | 黑龙江建龙钢铁有限公司 | High-strength corrosion-resistant oil well pipe with superfine crystal grains and production process thereof |
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| CN1884787A (en) * | 2006-06-06 | 2006-12-27 | 广州珠江钢铁有限责任公司 | Method for producing J55-grade steel for petroleum casing based on electric furnace sheet billet continuous casting an rolling process |
| CN102605235A (en) * | 2011-12-14 | 2012-07-25 | 宝鸡石油钢管有限责任公司 | High-collapse resistance hot stretch-reducing electric welding (SEW) petroleum casing pipe and manufacturing method thereof |
| CN106480375A (en) * | 2015-08-31 | 2017-03-08 | 鞍钢股份有限公司 | A kind of high-strength electric resistance welded sleeve pipe and its manufacture method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1884787A (en) * | 2006-06-06 | 2006-12-27 | 广州珠江钢铁有限责任公司 | Method for producing J55-grade steel for petroleum casing based on electric furnace sheet billet continuous casting an rolling process |
| CN102605235A (en) * | 2011-12-14 | 2012-07-25 | 宝鸡石油钢管有限责任公司 | High-collapse resistance hot stretch-reducing electric welding (SEW) petroleum casing pipe and manufacturing method thereof |
| CN106480375A (en) * | 2015-08-31 | 2017-03-08 | 鞍钢股份有限公司 | A kind of high-strength electric resistance welded sleeve pipe and its manufacture method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109023045A (en) * | 2018-08-02 | 2018-12-18 | 邯郸钢铁集团有限责任公司 | A kind of highly resistance H2The production method of S corrosion oil well casing J55 |
| CN109207851A (en) * | 2018-09-28 | 2019-01-15 | 宝山钢铁股份有限公司 | A kind of ultra-high strength steel plate and its manufacturing method |
| CN112553535A (en) * | 2020-12-16 | 2021-03-26 | 黑龙江建龙钢铁有限公司 | High-strength corrosion-resistant oil well pipe with superfine crystal grains and production process thereof |
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