CN115449695B - Production method of 1000 MPa-level high-strength round sucker rod steel - Google Patents
Production method of 1000 MPa-level high-strength round sucker rod steel Download PDFInfo
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- CN115449695B CN115449695B CN202211005705.3A CN202211005705A CN115449695B CN 115449695 B CN115449695 B CN 115449695B CN 202211005705 A CN202211005705 A CN 202211005705A CN 115449695 B CN115449695 B CN 115449695B
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- 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
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0006—Adding metallic additives
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
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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
- 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
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a production method of 1000 MPa-level high-strength sucker rod round steel, which adopts whole-course protection casting in the casting process, avoids secondary oxidation of molten steel, improves the purity of casting blanks, and reduces the generation of submerged bubbles of the casting blanks; the low superheat degree of the continuous casting molten steel is controlled, the secondary cooling adopts weak cooling and ensures uniform cooling, and surface cracks of casting blanks are avoided; the superheat degree is set to be 25-35 ℃ during continuous casting, and the pulling speed is 2.1m/min; the initial rolling temperature of the rolling is 950-1150 ℃ and the final rolling temperature is 900-950 ℃ and the heat treatment process comprises the following steps: quenching at 850 deg.C and tempering at 600 deg.C. The high-strength round steel for the sucker rod has the yield strength far greater than 1000MPa and good toughness, and can meet the use requirements of users.
Description
Technical Field
The invention relates to the technical field of metallurgy, in particular to a production method of 1000 MPa-level high-strength round sucker rod steel.
Background
The sucker rod is subjected to continuous reciprocating work under the alternating action of tension-compression stress in the mechanical oil extraction process, and is subjected to asymmetric cyclic alternating load in corrosive environments of different degrees for a long time.
Along with the exploitation of the thick oil well, the high-water-content oil well, the deep well or the ultra-deep well by the oil field, the requirement on the strength of the sucker rod is higher and higher, so that the market demand of the high-strength sucker rod is higher and higher, and the development of the sucker rod with high strength and high fatigue performance becomes a problem to be solved in the industry.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a production method of 1000 MPa-level high-strength round sucker rod steel.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention relates to a production method of 1000 MPa-level high-strength round sucker rod steel, which comprises the following steps:
one-time tapping, wherein a slag blocking ball or a slag blocking plug is used for blocking slag during tapping, and final deoxidization adopts silicon aluminum calcium barium;
the deoxidizer is added when the molten steel is tapped to 1/3, the alloy is added after the deoxidizer is added, and the adding amount of the alloy is adjusted according to the terminal carbon and the tapping amount;
the converter molten steel is conveyed by a ladle conveyor to a refining operation line, and is refined in a whole Ar blowing state; heating in a mode of gradually increasing the temperature rising speed from low level to high level, and performing slag formation, fine adjustment and temperature rising operation according to molten steel components and temperature change;
the whole-course protection casting is adopted in the casting process, so that secondary oxidation of molten steel is avoided, the purity of casting blanks is improved, and the generation of submerged bubbles of the casting blanks is reduced; the low superheat degree of the continuous casting molten steel is controlled, the secondary cooling adopts weak cooling and ensures uniform cooling, and surface cracks of casting blanks are avoided; the superheat degree is set to be 25-35 ℃ during continuous casting, and the pulling speed is 2.1m/min; the initial rolling temperature of the rolling is 950-1150 ℃ and the final rolling temperature is 900-950 ℃ and the heat treatment process comprises the following steps: quenching at 850 ℃ and tempering at 600 ℃;
the 1000 MPa-level high-strength sucker rod round steel comprises the following chemical components in percentage by mass: 0.40 to 0.45 percent of C, 0.15 to 0.35 percent of Si, 0.75 to 1.00 percent of Mn, 0.80 to 1.10 percent of Cr, 0.15 to 0.25 percent of Mo, and the balance of Fe and unavoidable impurities, wherein P in the impurities is less than or equal to 0.025 percent, and S in the impurities is less than or equal to 0.025 percent.
Further, the chemical components in percentage by mass are: 0.41% of C, 0.25% of Si, 0.80% of Mn, 0.83% of Cr, 0.20% of Mo, and the balance of Fe and unavoidable impurities, wherein P in the impurities is 0.013%, and S in the impurities is 0.008%.
Further, the chemical components in percentage by mass are: 0.42% of C, 0.20% of Si, 0.79% of Mn, 0.85% of Cr, 0.19% of Mo, and the balance of Fe and unavoidable impurities, wherein P in the impurities is 0.012%, and S in the impurities is 0.010%.
Further, the chemical components in percentage by mass are: 0.43% of C, 0.21% of Si, 0.81% of Mn, 0.89% of Cr, 0.18% of Mo, and the balance of Fe and unavoidable impurities, wherein P in the impurities is 0.011%, and S in the impurities is 0.012%.
Further, the chemical components in percentage by mass are: 0.41% of C, 0.22% of Si, 0.82% of Mn, 0.90% of Cr, 0.18% of Mo, and the balance of Fe and unavoidable impurities, wherein P in the impurities is 0.012%, and S in the impurities is 0.020%.
Further, the chemical components in percentage by mass are: 0.42% of C, 0.26% of Si, 0.77% of Mn, 0.82% of Cr, 0.20% of Mo, and the balance of Fe and unavoidable impurities, wherein P in the impurities is 0.014%, and S in the impurities is 0.011%.
Compared with the prior art, the invention has the beneficial technical effects that:
the high-strength round steel for the sucker rod has the yield strength far greater than 1000MPa and good toughness, and can meet the use requirements of users.
In order to verify the fatigue performance of the sucker rod made of the material, physical axial fatigue test is carried out on a PLG-200 high-frequency fatigue testing machine, and the physical fatigue cycle is 500 ten thousand times and is not broken, which is greater than the requirement that the fatigue cycle is greater than 100 ten thousand times in SY/T5029-2006 sucker rod standard.
Detailed Description
The industrial trial production of 5 furnaces steel, the specific technological parameters are controlled as follows:
converter production
Smelting by a combined blown converter, adopting a double slag method and a furnace rear carburetion process. When in one-time tapping, slag stopping balls or slag stopping plugs are used for stopping slag, silicon aluminum calcium barium is used for final deoxidation, and ferromanganese, silicon manganese and ferrochromium are added in the tapping process.
LF furnace refining
Refining is carried out in the whole Ar blowing state. Heating in a mode of gradually increasing the temperature rising speed from low level to high level, and performing slag formation, fine adjustment and temperature rising operation according to the molten steel components and temperature change. And the alloy is finely adjusted according to the refined in-place components, and ferromanganese, ferromolybdenum and the like are added.
Continuous casting production
Casting blank specification: 150×150mm, pull rate: 2.1m/min; degree of superheat: 28-32 ℃; and (5) adopting a crystallizer for electromagnetic stirring.
Rolling
The initial rolling temperature is 950-1150 ℃ and the final rolling temperature is 900-950 ℃.
Mechanical properties of sucker rod after heat treatment
The heat treatment process comprises the following steps: quenching at 850 deg.C and tempering at 600 deg.C.
As shown in the table, the yield strength of the high-strength round steel for the sucker rod is far more than 1000MPa, and the round steel has better toughness and can meet the use requirements of users.
In order to verify the fatigue performance of the sucker rod made of the material, physical axial fatigue test is carried out on a PLG-200 high-frequency fatigue testing machine, and the physical fatigue cycle is 500 ten thousand times and is not broken, which is greater than the requirement that the fatigue cycle is greater than 100 ten thousand times in SY/T5029-2006 sucker rod standard.
The above embodiments are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.
Claims (6)
1. The production method of the 1000 MPa-level high-strength round sucker rod steel is characterized by comprising the following steps of:
one-time tapping, wherein a slag blocking ball or a slag blocking plug is used for blocking slag during tapping, and final deoxidization adopts silicon aluminum calcium barium;
the deoxidizer is added when the molten steel is tapped to 1/3, the alloy is added after the deoxidizer is added, and the adding amount of the alloy is adjusted according to the terminal carbon and the tapping amount;
the converter molten steel is conveyed by a ladle conveyor to a refining operation line, and is refined in a whole Ar blowing state; heating in a mode of gradually increasing the temperature rising speed from low level to high level, and performing slag formation, fine adjustment and temperature rising operation according to molten steel components and temperature change;
the whole-course protection casting is adopted in the casting process, so that secondary oxidation of molten steel is avoided, the purity of casting blanks is improved, and the generation of submerged bubbles of the casting blanks is reduced; the low superheat degree of the continuous casting molten steel is controlled, the secondary cooling adopts weak cooling and ensures uniform cooling, and surface cracks of casting blanks are avoided; the superheat degree is set to be 25-35 ℃ during continuous casting, and the pulling speed is 2.1m/min; the initial rolling temperature of the rolling is 950-1150 ℃ and the final rolling temperature is 900-950 ℃ and the heat treatment process comprises the following steps: quenching at 850 ℃ and tempering at 600 ℃;
the 1000 MPa-level high-strength sucker rod round steel comprises the following chemical components in percentage by mass: 0.40 to 0.45 percent of C, 0.15 to 0.35 percent of Si, 0.75 to 1.00 percent of Mn, 0.80 to 1.10 percent of Cr, 0.15 to 0.25 percent of Mo, and the balance of Fe and unavoidable impurities, wherein P in the impurities is less than or equal to 0.025 percent, and S in the impurities is less than or equal to 0.025 percent.
2. The method for producing 1000 MPa-level high-strength round sucker rod steel according to claim 1, wherein the chemical components in mass percent are: 0.41% of C, 0.25% of Si, 0.80% of Mn, 0.83% of Cr, 0.20% of Mo, and the balance of Fe and unavoidable impurities, wherein P in the impurities is 0.013%, and S in the impurities is 0.008%.
3. The method for producing 1000 MPa-level high-strength round sucker rod steel according to claim 1, wherein the chemical components in mass percent are: 0.42% of C, 0.20% of Si, 0.79% of Mn, 0.85% of Cr, 0.19% of Mo, and the balance of Fe and unavoidable impurities, wherein P in the impurities is 0.012%, and S in the impurities is 0.010%.
4. The method for producing 1000 MPa-level high-strength round sucker rod steel according to claim 1, wherein the chemical components in mass percent are: 0.43% of C, 0.21% of Si, 0.81% of Mn, 0.89% of Cr, 0.18% of Mo, the balance being Fe and unavoidable impurities, 0.011% of P in the impurities and 0.012% of S in the impurities.
5. The method for producing 1000 MPa-level high-strength round sucker rod steel according to claim 1, wherein the chemical components in mass percent are: 0.41% of C, 0.22% of Si, 0.82% of Mn, 0.90% of Cr, 0.18% of Mo, and the balance of Fe and unavoidable impurities, wherein P in the impurities is 0.012%, and S in the impurities is 0.020%.
6. The method for producing 1000 MPa-level high-strength round sucker rod steel according to claim 1, wherein the chemical components in mass percent are: 0.42% of C, 0.26% of Si, 0.77% of Mn, 0.82% of Cr, 0.20% of Mo, and the balance of Fe and unavoidable impurities, wherein P in the impurities is 0.014%, and S in the impurities is 0.011%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211005705.3A CN115449695B (en) | 2022-08-22 | 2022-08-22 | Production method of 1000 MPa-level high-strength round sucker rod steel |
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| CN202211005705.3A CN115449695B (en) | 2022-08-22 | 2022-08-22 | Production method of 1000 MPa-level high-strength round sucker rod steel |
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| Publication Number | Publication Date |
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| CN115449695A CN115449695A (en) | 2022-12-09 |
| CN115449695B true CN115449695B (en) | 2023-09-26 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61295319A (en) * | 1985-06-21 | 1986-12-26 | Sumitomo Metal Ind Ltd | Manufacture of sucker rod for oil well containing wet gaseous carbon dioxide |
| CN101182757A (en) * | 2007-12-14 | 2008-05-21 | 天津钢管集团股份有限公司 | Sidetracking petroleum case pipe for petroleum natural gas mining industry and production process thereof |
| CN102162067A (en) * | 2011-03-28 | 2011-08-24 | 首钢总公司 | Steel for anticorrosion sucker rods in oil field and production method thereof |
| CN110273101A (en) * | 2019-06-14 | 2019-09-24 | 首钢集团有限公司 | A kind of H grade pumping rod and preparation method thereof |
| WO2020098306A1 (en) * | 2018-11-12 | 2020-05-22 | 南京钢铁股份有限公司 | Thick nm500 wear-resistant steel and production method therefor |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104532157A (en) * | 2014-12-19 | 2015-04-22 | 宝山钢铁股份有限公司 | 900MPa-1000MPa grade (yield strength) quenched-tempered high-strength steel and production method thereof |
| US20160305192A1 (en) * | 2015-04-14 | 2016-10-20 | Tenaris Connections Limited | Ultra-fine grained steels having corrosion-fatigue resistance |
| CN106086684B (en) * | 2016-08-24 | 2018-01-12 | 武汉钢铁有限公司 | With the thin hot forming steel of tensile strength >=1900MPa of sheet billet Direct Rolling and production method |
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2022
- 2022-08-22 CN CN202211005705.3A patent/CN115449695B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61295319A (en) * | 1985-06-21 | 1986-12-26 | Sumitomo Metal Ind Ltd | Manufacture of sucker rod for oil well containing wet gaseous carbon dioxide |
| CN101182757A (en) * | 2007-12-14 | 2008-05-21 | 天津钢管集团股份有限公司 | Sidetracking petroleum case pipe for petroleum natural gas mining industry and production process thereof |
| CN102162067A (en) * | 2011-03-28 | 2011-08-24 | 首钢总公司 | Steel for anticorrosion sucker rods in oil field and production method thereof |
| WO2020098306A1 (en) * | 2018-11-12 | 2020-05-22 | 南京钢铁股份有限公司 | Thick nm500 wear-resistant steel and production method therefor |
| CN110273101A (en) * | 2019-06-14 | 2019-09-24 | 首钢集团有限公司 | A kind of H grade pumping rod and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 30CrMoARE稀土抽油杆圆钢生产实践;杨鲁明;涛雅;吕刚;赵晓敏;;包钢科技(第04期);全文 * |
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| CN115449695A (en) | 2022-12-09 |
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