CN110846573A - Seamless steel tube for X80 conveying pipeline and manufacturing method thereof - Google Patents
Seamless steel tube for X80 conveying pipeline and manufacturing method thereof Download PDFInfo
- Publication number
- CN110846573A CN110846573A CN201911080003.XA CN201911080003A CN110846573A CN 110846573 A CN110846573 A CN 110846573A CN 201911080003 A CN201911080003 A CN 201911080003A CN 110846573 A CN110846573 A CN 110846573A
- Authority
- CN
- China
- Prior art keywords
- percent
- equal
- less
- temperature
- seamless steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
-
- 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
- C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
-
- 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
- C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
- C21D8/105—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies of ferrous alloys
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- 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
Abstract
The invention discloses a seamless steel tube for an X80 conveying pipeline, which comprises the following chemical components in percentage by mass: c is less than or equal to 0.18 percent; 0.25-0.40% of Si; 0.10-1.5% of Mn; p is less than or equal to 0.020%; s is less than or equal to 0.010 percent; nb + V + Ti is less than or equal to 0.10 percent; the balance of Fe and inevitable impurities, and the mass fraction is 100 percent. A method of manufacture is also disclosed. The invention takes C, Mn as a basis, produces the V-shaped full-size transverse impact energy higher than 80J under the experimental environment of-35 ℃ by the processes of steel making, pipe rolling, heat treatment, processing and the like through the reasonable proportion of micro alloy elements such as Nb, V, Ti and the like, wherein the carbon equivalent is less than or equal to 0.43%, the yield strength is greater than or equal to 580MPa, the tensile strength is greater than or equal to 670MPa, and the use requirement of X80-grade pipeline pipes is met.
Description
Technical Field
The invention relates to the field of metallurgical materials, in particular to a seamless steel tube for an X80 conveying pipeline and a manufacturing method thereof.
Background
The pipeline transportation as one of five transportation modes (railway, highway, water transportation, aviation and pipeline) has a history of more than 100 years in the world, and is the most convenient and economic transportation mode for energy media such as petroleum, natural gas, coal and the like due to the characteristics of economy, safety, high efficiency, no interruption, no pollution and the like. With the development of the energy industry and the development of offshore and deep sea oil and gas fields, seamless steel pipes for pipelines are selected in projects from the initial X42 to the X65, X70 and even the X80 which are commonly used at present, and the high steel grade becomes one of the development directions. The requirements of X90 and X100 steel grade seamless steel pipes are newly increased in the API 5L standard of the new edition, which fully indicates that high steel grade becomes a development trend and has a wide market. The steel pipe wall thickness and the quality can be reduced, the steel cost is saved, and the steel pipe transportation cost and the welding workload can be reduced due to the reduction of the steel pipe wall thickness, so that the investment cost and the operation cost of pipeline construction are greatly reduced, and the application of high-grade steel pipes becomes an inevitable trend of pipeline engineering development.
The pipeline pipes are connected in a welding mode, so that the requirement on welding performance is high, carbon equivalent is an important index for measuring weldability when X80-grade seamless pipeline pipe steel is developed, and the performance requirement of high-strength steel pipes is ensured while the carbon equivalent is as low as possible.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a seamless steel tube for an X80 conveying pipeline and a manufacturing method thereof, wherein C, Mn is used as a basis, the reasonable proportion of micro alloy elements such as Nb, V and Ti is adopted, and the processes of steel making, tube rolling, heat treatment, processing and the like are adopted to produce a seamless steel tube with the carbon equivalent of less than or equal to 0.43%, the yield strength of more than or equal to 580MPa, the tensile strength of more than or equal to 670MPa and the V-shaped full-size transverse impact energy of more than 80J under the experimental environment of-35 ℃, so that the use requirement of X80-grade pipeline tubes is; the method not only solves the contradiction between high strength and low carbon equivalent, but also has excellent toughness, and brings great economic benefit and social benefit for enterprises.
In order to solve the technical problems, the invention adopts the following technical scheme:
a seamless steel pipe for an X80 conveying pipeline comprises the following chemical components in percentage by mass: c is less than or equal to 0.18 percent; 0.25-0.40% of Si; 0.10-1.5% of Mn; p is less than or equal to 0.020%; s is less than or equal to 0.010 percent; nb + V + Ti is less than or equal to 0.10 percent; the balance of Fe and inevitable impurities, and the mass fraction is 100 percent.
Carbon (C): as the most economical and basic strengthening elements in steel, the steel strength is obviously improved through solid solution strengthening and precipitation strengthening, but the excessive carbon content has adverse effects on the elongation, toughness and weldability of the steel, and simultaneously carbide of alloy elements is easily precipitated at grain boundaries, so that the corrosion resistance, especially the sulfur resistance, of the steel is reduced.
Manganese (Mn): mn can greatly improve the strength and toughness of steel grades through solid solution strengthening, is the most important and economical strengthening element for compensating strength loss caused by reduction of C content, is also an effective deoxidizer, and has an effect of removing S, but excessively high Mn promotes formation of carbides, thereby reducing the toughness and corrosion resistance of steel grades; mn can be infinitely mutually dissolved with gamma-Fe, a gamma region is enlarged, the hardenability of steel is increased, but excessively high Mn has the tendency of increasing austenite growth, grains are easy to be coarse, the steel has overheating sensitivity and tempering brittleness, and the welding performance of the steel is reduced. Therefore, for the present invention, the Mn content is in the range of 0.10 to 1.5%.
Niobium, vanadium, titanium (Nb, V, Ti): nb, V, Ti and C, N have strong bonding ability to form respective carbide, nitride or carbonitride, have strong grain refinement and precipitation strengthening effects, and greatly improve the mechanical properties of steel grades. The Nb in the steel is characterized in that the recrystallization temperature of austenite is increased, so that the aim of refining austenite grains is fulfilled, the steel can obtain excellent comprehensive performance due to trace Nb, and the steel is easy to have mixed grains due to overhigh Nb content; the Ti forms a fine and stable precipitated phase during billet continuous casting, and the precipitated phase can effectively prevent austenite grains from growing during heating, is beneficial to improving the solid solubility of Nb in austenite, and has an obvious effect on improving the impact toughness of a welding heat affected zone. However, when the content of Nb, V or Ti exceeds 0.1%, the precipitated phase particles become coarse and oxide inclusions increase, adversely affecting the weldability of the steel grade. Therefore, Nb + V + Ti is less than or equal to 0.10 percent.
Further, the paint comprises the following chemical components in percentage by mass: c is less than or equal to 0.17 percent; 0.34 percent of Si; 1.29 percent of Mn; 0.015 percent of P; 0.007 percent of S; 0.026% of Nb; v0.024%; 0.014% of Ti; the balance of Fe and inevitable impurities, and the mass fraction is 100 percent.
Further, the paint comprises the following chemical components in percentage by mass: c is less than or equal to 0.15 percent; 0.34 percent of Si; 1.30 percent of Mn; 0.015 percent of P; 0.007 percent of S; 0.026% of Nb; v0.030%; 0.013 percent of Ti; the balance of Fe and inevitable impurities, and the mass fraction is 100 percent.
Further, the paint comprises the following chemical components in percentage by mass: c is less than or equal to 0.17 percent; 0.36 percent of Si; 1.36 percent of Mn; p0.014%; 0.008 percent of S; nb 0.0306%; v0.026%; 0.014% of Ti; the balance of Fe and inevitable impurities, and the mass fraction is 100 percent.
Further, the paint comprises the following chemical components in percentage by mass: c is less than or equal to 0.16 percent; 0.31 percent of Si; 1.40 percent of Mn; p0.012%; 0.003 percent of S; nb 0.032%; v0.026%; 0.013 percent of Ti; the balance of Fe and inevitable impurities, and the mass fraction is 100 percent.
Further, the paint comprises the following chemical components in percentage by mass: c is less than or equal to 0.15 percent; 0.32% of Si; 1.35 percent of Mn; p0.013%; 0.004 percent of S; nb 0.027%; v0.026%; 0.015 percent of Ti; the balance of Fe and inevitable impurities, and the mass fraction is 100 percent.
Further, the production specification of the seamless steel pipe is phi 406.6 multiplied by 16.66 mm.
A manufacturing method of a seamless steel tube for an X80 conveying pipeline comprises the following steel-making production processes: molten iron pretreatment → converter smelting → LF refining → VD degassing → round billet continuous casting; wherein, the incoming molten iron must be pretreated to ensure the quality of the molten iron supplied to the converter, and in order to inhibit the gas content in the material, the silicomanganese, ferromanganese, ferroniobium, ferrovanadium and ferrotitanium must be deoxidized and alloyed before being added; converter endpoint control objective: c is more than or equal to 0.06 percent, and P is less than or equal to 0.015 percent; smelting by adopting a single slag process, wherein the alkalinity of final slag is more than or equal to 3.0; slag is required to be removed during tapping, and slag is required to be removed when slag removal fails; in the LF refining link, slagging, desulfurizing, component adjusting and heating up are carried out according to the components and temperature of the molten steel of the converter, the target value of VD deep vacuum degree is less than or equal to 0.06Kpa, the deep vacuum time is more than or equal to 15 minutes, after VD is finished, a proper amount of calcium-silicon wires are fed, and after wire feeding, soft blowing Ar is not less than 15 minutes so as to ensure the lower gas content in the material; an electromagnetic stirring process is adopted in the continuous casting process, the superheat degree delta T of molten steel is less than or equal to 30 ℃, proper drawing speed constant drawing speed production is selected according to different round billet sections, the round billets are slowly cooled in slow cooling pits, the pit entering temperature is greater than 600 ℃, the slow cooling time is not less than 48 hours, and high-quality round billets with few impurities and uniform components are obtained through the method;
the tube rolling process comprises the following steps: round billet → saw cutting → annular furnace heating → perforation → PQF continuous rolling → sizing → cooling; the temperature of the heat preservation section of the annular furnace is about 1260 ℃, and the temperature of the round billet after perforation is about 1220 ℃; the inlet temperature of the continuous rolling is about 1100 ℃; the temperature after sizing is about 930 ℃; obtaining a high-quality pipe body with high dimensional precision by combining a three-roller retained mandrel continuous rolling unit PQF with a high-end hot rolling control technology;
the heat treatment process comprises the following steps: quenching and tempering, namely quenching and tempering; wherein the quenching adopts a water spraying mode of inner spraying and outer spraying, in order to avoid the bending of the steel pipe, the inner spraying is delayed for a certain time than the outer spraying, the water quantity is adjusted according to the specification, the temperature is 900 +/-10 ℃, and the heat preservation is carried out for about 50 minutes; the tempering temperature is 580-650 ℃, the temperature is kept for about 90 minutes, and the sizing and straightening temperature after tempering is not less than about 500 ℃.
Compared with the prior art, the invention has the beneficial technical effects that:
the X80-grade seamless line pipe provided by the invention has the characteristics of reasonable selection of microalloy elements and proper element content proportion, so that the steel grade has lower carbon equivalent, and the reasonable smelting continuous casting process, rolling process and heat treatment process are easy to produce and low in cost, so that the steel pipe has high strength, excellent impact toughness and high dimensional precision, is easy to produce, has low cost and excellent performance, and meets the use requirements of high-strength line pipes.
Detailed Description
The steel pipe material obtained according to the invention is prepared by taking the production specification phi 406.6 multiplied by 16.66mm as an example, and the chemical components of each example are shown in the following table 1:
TABLE 1 statistical results wt% of the chemical composition of the inventive steel pipes
The chemical components of the steel pipe completely meet the requirements of the invention on steel grades, the contents of P and S are lower, the carbon equivalent is low, the component design requirements are met, and the deviation of the contents of the components of each furnace is very small as can be seen from the table 1, and the stable contents of the components are beneficial to temperature control during heat treatment, thereby providing preconditions for the good structure and performance of the pipe.
The steel-making process comprises the following steps: the steel pipe with the specification of phi 406.6 multiplied by 16.66mm is produced by adopting a continuous casting round billet with the section of phi 430mm, and the arc radius of a sector section of a steelmaking continuous casting machine of a steel-clad steel pipe company is 12 m. In order to overcome the problem that micro cracks on the surface of a large-section round billet produced by a small arc radius are easy to generate, particularly steel grades containing micro alloy elements such as Nb, V, Ti and the like which are sensitive to the cracks, a series of measures are taken, such as appropriate Nb, V and Ti contents and proportions; the continuous casting is stable in drawing speed, and the temperature of the continuous casting billet in the straightening section is not less than 900 ℃; adopting a weak and uniform secondary cooling system; proper casting powder is selected, and centering and arc aligning precision of the casting machine is improved; after the casting blank is off line, the round blank enters a slow cooling pit for slow cooling, and the temperature of the round blank entering the pit is higher than 600 ℃ so as to eliminate the structural stress and the thermal stress. Through the measures, the high-quality round billet is obtained.
The tube rolling process comprises the following steps: round billet → saw cutting → heating in a circular furnace → perforation → PQF continuous rolling → sizing → cooling. Heating the round billet in an annular furnace at 1270 deg.C, heating the billet to +/-10 deg.C, wherein the time in the furnace should not be overlong, piercing by low-speed biting and high-speed rolling process at 1220 deg.C, rolling in a continuous rolling mill at 1100 deg.C, sizing at 940 deg.C, cooling, and sawing.
And (3) heat treatment: quenching and tempering are adopted, namely quenching and tempering. Wherein the quenching adopts a water spraying mode of inner spraying and outer spraying, in order to avoid the bending of the steel pipe, the inner spraying is delayed for a certain time than the outer spraying, the water quantity is adjusted according to the specification, the temperature is 900 +/-10 ℃, and the heat preservation is carried out for about 50 minutes; the tempering temperature is 600 ℃, the temperature is kept for about 90 minutes, the sizing and straightening temperature after tempering is not less than 500 ℃, and flaw detection is carried out after straightening.
The geometric dimension of the pipeline pipe of the invention is as follows:
tube end diameter range: 404.57 to 408.63 (-0.5% D- + 0.5% D)
Wall thickness range: 15.33 ~ 18.33 (-8% t- + 10% t)
Out-of-roundness: OD less than or equal to 1% as a whole
Straightness: the integral is less than or equal to 0.15 percent, the distance from the end of the pipe is within 1000mm, and the bending of the end is less than or equal to 3.0 mm.
The pipeline pipe has high dimensional precision and is easy to weld steel pipes.
The mechanical properties of the steel pipe of the present invention are shown in Table 2. The steel pipe produced by the invention has the specification of phi 406.6 multiplied by 16.66mm, small yield ratio, high elongation, excellent low-temperature impact toughness and transverse impact of more than 80J at-35 ℃.
TABLE 2 mechanical Properties of the inventive Steel pipes
The inclusions and the grain size of the structure of the steel pipe of the present invention are shown in Table 3.
TABLE 3 grain size of steel pipes according to the invention and impurities and texture
Note: sGo back toIndicating tempered sorbite
The strength of the steel pipe with the specification of phi 406.6 multiplied by 16.66mm produced by the invention reaches X80 steel grade, the reasonable selection of micro alloy elements and the proper element content proportion ensure that the steel grade has lower carbon equivalent and is easy to weld, the problem of insufficient strength of a large-caliber thick-wall pipe is solved, the steel pipe is easy to produce and low in cost, and the reasonable smelting continuous casting process, rolling process and heat treatment process ensure that the steel pipe has higher strength, excellent impact toughness and high dimensional accuracy, and the use requirement of the high-strength pipeline pipe is met.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (8)
1. A seamless steel pipe for an X80 conveying pipeline is characterized by comprising the following chemical components in percentage by mass: c is less than or equal to 0.18 percent; 0.25-0.40% of Si; 0.10-1.5% of Mn; p is less than or equal to 0.020%; s is less than or equal to 0.010 percent; nb + V + Ti is less than or equal to 0.10 percent; the balance of Fe and inevitable impurities, and the mass fraction is 100 percent.
2. The seamless steel tube for the X80 conveying pipeline according to claim 1, characterized by comprising the following chemical components by mass percent: c is less than or equal to 0.17 percent; 0.34 percent of Si; 1.29 percent of Mn; 0.015 percent of P; 0.007 percent of S; 0.026% of Nb; v0.024%; 0.014% of Ti; the balance of Fe and inevitable impurities, and the mass fraction is 100 percent.
3. The seamless steel tube for the X80 conveying pipeline according to claim 1, characterized by comprising the following chemical components by mass percent: c is less than or equal to 0.15 percent; 0.34 percent of Si; 1.30 percent of Mn; 0.015 percent of P; 0.007 percent of S; 0.026% of Nb; v0.030%; 0.013 percent of Ti; the balance of Fe and inevitable impurities, and the mass fraction is 100 percent.
4. The seamless steel tube for the X80 conveying pipeline according to claim 1, characterized by comprising the following chemical components by mass percent: c is less than or equal to 0.17 percent; 0.36 percent of Si; 1.36 percent of Mn; p0.014%; 0.008 percent of S; nb 0.0306%; v0.026%; 0.014% of Ti; the balance of Fe and inevitable impurities, and the mass fraction is 100 percent.
5. The seamless steel tube for the X80 conveying pipeline according to claim 1, characterized by comprising the following chemical components by mass percent: c is less than or equal to 0.16 percent; 0.31 percent of Si; 1.40 percent of Mn; p0.012%; 0.003 percent of S; nb 0.032%; v0.026%; 0.013 percent of Ti; the balance of Fe and inevitable impurities, and the mass fraction is 100 percent.
6. The seamless steel tube for the X80 conveying pipeline according to claim 1, characterized by comprising the following chemical components by mass percent: c is less than or equal to 0.15 percent; 0.32% of Si; 1.35 percent of Mn; p0.013%; 0.004 percent of S; nb 0.027%; v0.026%; 0.015 percent of Ti; the balance of Fe and inevitable impurities, and the mass fraction is 100 percent.
7. The seamless steel tube for X80 transportation pipeline according to claim 1, wherein the seamless steel tube has a production specification of Φ 406.6X 16.66 mm.
8. The method for manufacturing the seamless steel tube for the X80 conveying pipeline according to claim 1, wherein the steel-making production process comprises: molten iron pretreatment → converter smelting → LF refining → VD degassing → round billet continuous casting; wherein, the incoming molten iron must be pretreated to ensure the quality of the molten iron supplied to the converter, and in order to inhibit the gas content in the material, the silicomanganese, ferromanganese, ferroniobium, ferrovanadium and ferrotitanium must be deoxidized and alloyed before being added; converter endpoint control objective: c is more than or equal to 0.06 percent, and P is less than or equal to 0.015 percent; smelting by adopting a single slag process, wherein the alkalinity of final slag is more than or equal to 3.0; slag is required to be removed during tapping, and slag is required to be removed when slag removal fails; in the LF refining link, slagging, desulfurizing, component adjusting and heating up are carried out according to the components and temperature of the molten steel of the converter, the target value of VD deep vacuum degree is less than or equal to 0.06Kpa, the deep vacuum time is more than or equal to 15 minutes, after VD is finished, a proper amount of calcium-silicon wires are fed, and after wire feeding, soft blowing Ar is not less than 15 minutes so as to ensure the lower gas content in the material; an electromagnetic stirring process is adopted in the continuous casting process, the superheat degree delta T of molten steel is less than or equal to 30 ℃, proper drawing speed constant drawing speed production is selected according to different round billet sections, the round billets are slowly cooled in slow cooling pits, the pit entering temperature is greater than 600 ℃, the slow cooling time is not less than 48 hours, and high-quality round billets with few impurities and uniform components are obtained through the method;
the tube rolling process comprises the following steps: round billet → saw cutting → annular furnace heating → perforation → PQF continuous rolling → sizing → cooling; the temperature of the heat preservation section of the annular furnace is about 1260 ℃, and the temperature of the round billet after perforation is about 1220 ℃; the inlet temperature of the continuous rolling is 1100 ℃; the temperature after sizing is 930 ℃; obtaining a high-quality pipe body with high dimensional precision by combining a three-roller retained mandrel continuous rolling unit PQF with a high-end hot rolling control technology;
the heat treatment process comprises the following steps: quenching and tempering, namely quenching and tempering; wherein the quenching adopts a water spraying mode of inner spraying and outer spraying, in order to avoid the bending of the steel pipe, the inner spraying is delayed for a certain time than the outer spraying, the water quantity is adjusted according to the specification, the temperature is 900 +/-10 ℃, and the heat preservation is carried out for 50 minutes; the tempering temperature is 580-650 ℃, the temperature is kept for 90 minutes, and the sizing and straightening temperature after tempering is not less than 500 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911080003.XA CN110846573A (en) | 2019-11-07 | 2019-11-07 | Seamless steel tube for X80 conveying pipeline and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911080003.XA CN110846573A (en) | 2019-11-07 | 2019-11-07 | Seamless steel tube for X80 conveying pipeline and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110846573A true CN110846573A (en) | 2020-02-28 |
Family
ID=69598733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911080003.XA Pending CN110846573A (en) | 2019-11-07 | 2019-11-07 | Seamless steel tube for X80 conveying pipeline and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110846573A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111378899A (en) * | 2020-04-30 | 2020-07-07 | 鞍钢股份有限公司 | L450 seamless line pipe resistant to low temperature and hydrogen sulfide corrosion and manufacturing method thereof |
| CN112593145A (en) * | 2020-11-10 | 2021-04-02 | 鞍钢股份有限公司 | Hot-rolled Q345 seamless steel tube and manufacturing method thereof |
| CN114619004A (en) * | 2022-02-28 | 2022-06-14 | 包头钢铁（集团）有限责任公司 | Rare earth microalloying cold-drawn high-strength seamless steel tube for hydraulic cylinder and preparation method thereof |
| CN115558862A (en) * | 2022-10-18 | 2023-01-03 | 包头钢铁（集团）有限责任公司 | L360NX52N steel pipe with wall thickness of 11-16 mm and manufacturing method thereof |
| CN116732434A (en) * | 2023-05-30 | 2023-09-12 | 包头钢铁（集团）有限责任公司 | Seamless steel tube for rare earth microalloyed high-strength piston rod and manufacturing method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001220642A (en) * | 2000-02-03 | 2001-08-14 | Sumitomo Metal Ind Ltd | Soft high carbon steel strip small in heat treating strain and producing method tehrefor |
| JP2002129288A (en) * | 2000-10-30 | 2002-05-09 | Nippon Steel Corp | High strength pipe bend and its manufacturing method |
| CN107557664A (en) * | 2017-08-21 | 2018-01-09 | 包头钢铁（集团）有限责任公司 | A kind of anticorrosive Hi-grade steel submarine seamless line pipe and its manufacture method |
| CN109881114A (en) * | 2019-03-15 | 2019-06-14 | 包头钢铁（集团）有限责任公司 | A kind of heavy caliber thick wall low temperature seamless line pipe and its manufacturing method |
-
2019
- 2019-11-07 CN CN201911080003.XA patent/CN110846573A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001220642A (en) * | 2000-02-03 | 2001-08-14 | Sumitomo Metal Ind Ltd | Soft high carbon steel strip small in heat treating strain and producing method tehrefor |
| JP2002129288A (en) * | 2000-10-30 | 2002-05-09 | Nippon Steel Corp | High strength pipe bend and its manufacturing method |
| CN107557664A (en) * | 2017-08-21 | 2018-01-09 | 包头钢铁（集团）有限责任公司 | A kind of anticorrosive Hi-grade steel submarine seamless line pipe and its manufacture method |
| CN109881114A (en) * | 2019-03-15 | 2019-06-14 | 包头钢铁（集团）有限责任公司 | A kind of heavy caliber thick wall low temperature seamless line pipe and its manufacturing method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111378899A (en) * | 2020-04-30 | 2020-07-07 | 鞍钢股份有限公司 | L450 seamless line pipe resistant to low temperature and hydrogen sulfide corrosion and manufacturing method thereof |
| CN112593145A (en) * | 2020-11-10 | 2021-04-02 | 鞍钢股份有限公司 | Hot-rolled Q345 seamless steel tube and manufacturing method thereof |
| CN114619004A (en) * | 2022-02-28 | 2022-06-14 | 包头钢铁（集团）有限责任公司 | Rare earth microalloying cold-drawn high-strength seamless steel tube for hydraulic cylinder and preparation method thereof |
| CN115558862A (en) * | 2022-10-18 | 2023-01-03 | 包头钢铁（集团）有限责任公司 | L360NX52N steel pipe with wall thickness of 11-16 mm and manufacturing method thereof |
| CN116732434A (en) * | 2023-05-30 | 2023-09-12 | 包头钢铁（集团）有限责任公司 | Seamless steel tube for rare earth microalloyed high-strength piston rod and manufacturing method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110846573A (en) | Seamless steel tube for X80 conveying pipeline and manufacturing method thereof | |
| CN101417296B (en) | Manufacture method of large caliber high steel grade corrosion proof seamless steel tube in diameter phi 219.0-460.0mm | |
| CN103526129B (en) | Thick-specification acid-corrosion-resisting X65 pipeline steel plate and manufacturing method thereof | |
| CN111286668A (en) | Low-cost high-low-temperature-toughness rare earth steel for wind power flange and production process thereof | |
| CN114131240B (en) | Wire rod for pipeline steel gas shielded welding wire and manufacturing method thereof | |
| CN107557664A (en) | A kind of anticorrosive Hi-grade steel submarine seamless line pipe and its manufacture method | |
| CN107338392A (en) | High-strength low-yield ratio easily welds moving pressure container steel plate and its manufacture method | |
| CN110846574A (en) | Low-cost quenched and tempered X52-grade hydrogen sulfide corrosion-resistant seamless pipeline pipe and manufacturing method thereof | |
| CN108642375B (en) | Non-quenched and tempered microalloyed steel pipe and method for manufacturing non-quenched and tempered microalloyed steel pipe | |
| CN108559907A (en) | A kind of low field trash pipe line steel production method | |
| CN109930066A (en) | A kind of hydrogen sulfide corrosion resistant low temperature seamless line pipe and preparation method thereof | |
| CN112247399A (en) | 700 MPa-level annealing-free drawing high-strength steel gas protection solid welding wire | |
| CN112522602A (en) | Chromium-free molybdenum hot-rolled steel strip for H2S corrosion resistant L360MS spiral welded pipe and manufacturing method thereof | |
| CN111378893A (en) | Hot-rolled steel plate for longitudinal welded pipe with yield strength of 290MPa | |
| CN114619004A (en) | Rare earth microalloying cold-drawn high-strength seamless steel tube for hydraulic cylinder and preparation method thereof | |
| CN111455275A (en) | Seamless steel tube for oil-gas well perforating gun and manufacturing method thereof | |
| CN110863145A (en) | ERW submarine pipeline steel plate coil and production process thereof | |
| CN110404972A (en) | A kind of production method for the seamless steel pipe that diameter is 1422mm | |
| CN109881114A (en) | A kind of heavy caliber thick wall low temperature seamless line pipe and its manufacturing method | |
| CN113528958A (en) | Hot-rolled wire rod for high-strength wear-resistant steel welding wire and production method thereof | |
| CN111187978A (en) | Phi 559 mm-711 mm large-caliber oblique rolling rotary-expansion seamless pipeline pipe and manufacturing method thereof | |
| CN111074150B (en) | High-strength high-hardenability corrosion-resistant drill bit steel and preparation method thereof | |
| CN111155027B (en) | Low-alloy high-strength seamless steel tube for rare earth-containing Q390 structure and preparation method thereof | |
| CN113245742A (en) | Novel low-cost welding wire for submerged-arc welding of X80 pipeline steel and preparation method thereof | |
| CN112813359A (en) | Medium-carbon low-alloy high-strength hydrogen sulfide corrosion-resistant oil well pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200228 |