CN116752040A - Production method of titanium-nickel-molybdenum series 700 MPa-grade welding wire steel - Google Patents
Production method of titanium-nickel-molybdenum series 700 MPa-grade welding wire steel Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 44
- 239000010959 steel Substances 0.000 title claims abstract description 44
- 238000003466 welding Methods 0.000 title claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- ANUQVPMOKIYKBZ-UHFFFAOYSA-N [Ti].[Ni].[Mo] Chemical class [Ti].[Ni].[Mo] ANUQVPMOKIYKBZ-UHFFFAOYSA-N 0.000 title claims abstract description 12
- 238000007670 refining Methods 0.000 claims abstract description 23
- 239000012535 impurity Substances 0.000 claims abstract description 17
- 238000007664 blowing Methods 0.000 claims abstract description 15
- 238000010079 rubber tapping Methods 0.000 claims abstract description 13
- 238000009749 continuous casting Methods 0.000 claims abstract description 10
- 239000000126 substance Substances 0.000 claims abstract description 9
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000010936 titanium Substances 0.000 claims abstract description 5
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 58
- 229910052742 iron Inorganic materials 0.000 claims description 25
- 238000006477 desulfuration reaction Methods 0.000 claims description 21
- 230000023556 desulfurization Effects 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 17
- 238000003756 stirring Methods 0.000 claims description 15
- 239000002893 slag Substances 0.000 claims description 14
- 229910052717 sulfur Inorganic materials 0.000 claims description 14
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 12
- 230000003009 desulfurizing effect Effects 0.000 claims description 12
- 229910052760 oxygen Inorganic materials 0.000 claims description 12
- 239000001301 oxygen Substances 0.000 claims description 12
- 229910052799 carbon Inorganic materials 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 7
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 6
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 6
- 229910052786 argon Inorganic materials 0.000 claims description 6
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000010436 fluorite Substances 0.000 claims description 6
- 239000004571 lime Substances 0.000 claims description 6
- 230000000630 rising effect Effects 0.000 claims description 6
- 239000011593 sulfur Substances 0.000 claims description 6
- 238000007667 floating Methods 0.000 claims description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims description 4
- 239000011574 phosphorus Substances 0.000 claims description 4
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 3
- 229910000720 Silicomanganese Inorganic materials 0.000 claims description 3
- 238000003723 Smelting Methods 0.000 claims description 3
- 239000000443 aerosol Substances 0.000 claims description 3
- 238000005275 alloying Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 239000010459 dolomite Substances 0.000 claims description 3
- 229910000514 dolomite Inorganic materials 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 229910001209 Low-carbon steel Inorganic materials 0.000 abstract description 2
- 238000009628 steelmaking Methods 0.000 abstract description 2
- 239000003973 paint Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
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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
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/18—Controlling or regulating processes or operations for pouring
-
- 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
- C21C7/0075—Treating in a ladle furnace, e.g. up-/reheating of molten steel within the ladle
-
- 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
-
- 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
- C22C33/06—Making ferrous alloys by melting using master 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a production method of a titanium-nickel-molybdenum series 700 MPa-level welding wire steel, which comprises the following chemical components in percentage by mass: c is less than or equal to 0.10 percent, si:0.45-0.65%, mn:1.55-1.70%, cr:0.15-0.25%, ti 0.05-0.16%, ni:0.65-0.75%, mo:0.20-0.30%, and the balance of Fe and unavoidable impurities; the production steps mainly comprise: the content of C in the molten steel at the end point of the converter is not less than 0.06 weight percent, and the content of P is not more than 0.025 weight percent; the tapping temperature of the converter is 1620-1640 ℃, and the tapping of the converter adopts an aluminum-free deoxidizer; soft blowing for more than 10 minutes after refining; the superheat degree of continuous casting is set to be 25-35 ℃ and the pulling speed is 2-2.2m/min. The invention aims to solve the technical problems in the steelmaking control of titanium-containing steel and low-carbon steel.
Description
Technical Field
The invention relates to the technical field of metallurgy, in particular to a production method of 700 MPa-level welding wire steel of a titanium-nickel-molybdenum system.
Background
The 700MPa grade welding wire steel is a high-strength welding steel, is mainly used for welding engineering machinery manufacturing, boiler pressure vessels, automobile industry, bridge building structures and the like, has more welding wire enterprises for producing the grade in China, but generally has the conditions of unstable performance and lower performance, and provides the 700MPa welding wire steel with stable performance and high strength.
Disclosure of Invention
The invention aims to provide a production method of 700 MPa-grade welding wire steel of a titanium-nickel-molybdenum system on the basis of 700 MPa-grade welding wire steel production, and solves the technical problems in steelmaking control of titanium-containing steel and low-carbon steel.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention relates to a production method of a titanium-nickel-molybdenum series 700MPa grade welding wire steel, which comprises the following chemical components in percentage by mass: c is less than or equal to 0.10 percent, si:0.45-0.65%, mn:1.55-1.70%, cr:0.15-0.25%, ti 0.05-0.16%, ni:0.65-0.75%, mo:0.20-0.30%, the balance being Fe and unavoidable impurities, P in the impurities being less than or equal to 0.020%, S being less than or equal to 0.020%; the production steps mainly comprise:
the content of C in the molten steel at the end point of the converter is not less than 0.06 weight percent, and the content of P is not more than 0.025 weight percent; the tapping temperature of the converter is 1620-1640 ℃, and the tapping of the converter adopts an aluminum-free deoxidizer; after the ladle reaches the refining process, soft blowing for more than 10 minutes after the refining process is ensured, and the uniformity of the temperature of the ladle and the floating of fine inclusions are ensured; the superheat degree of continuous casting is set to be 25-35 ℃ and the pulling speed is 2-2.2m/min.
Further, the main preparation process is as follows: molten iron desulfurization, converter, LF refining and continuous casting; wherein:
desulfurizing molten iron: blast furnace slag is removed before desulfurization, so that desulfurization efficiency is improved; taking iron ore to be melted into molten iron, desulfurizing the molten iron by adopting a KR method, namely stirring the molten iron by adopting a stirring paddle with the rotating speed of 90r/min, and adding a desulfurizing agent after stirring for 2min, wherein the desulfurizing agent is 9:1, mixing lime powder and fluorite according to the mass ratio, stirring and reacting for 10min, and standing for 5min; removing desulfurization slag after molten iron desulfurization and standing, stabilizing desulfurization effect, preventing desulfurization slag from entering a converter to cause converter reversion, and ensuring that the sulfur content in steel is controlled below 0.01%;
and (3) a converter: in order to ensure the quality of the product and the accurate control of the components of the finished product, the requirements of molten iron of a converter are as follows: the content of phosphorus is less than or equal to 0.13 percent and the content of sulfur is less than or equal to 0.050 percent by mass percent; adding slag-making auxiliary materials such as lime, dolomite, fluorite and the like in the converter smelting process, and adding ferrosilicon, silicomanganese and silicoaluminomanganese for deoxidization alloying according to the component requirements of the finished product in the tapping process;
refining: 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; in order to ensure the low-carbon requirement of the finished wire rod, the LF refining strictly controls the carbon content, and the carbon content control target is 0.05%; after the ladle in the refining process reaches refining, the temperature is measured when the ladle bottom is subjected to soft argon blowing for 5min, and oxygen is fixed after the molten steel stops argon blowing and calm for 1 min; the activity oxygen control target is 40-50ppm, and the aluminum-free deoxidizer is supplemented when the oxygen is high; ensuring soft blowing for more than 10 minutes, and ensuring the uniformity of the ladle temperature and the floating of fine inclusions; the oxygen content in the steel directly influences the yield of titanium;
continuous casting: the water quantity of the crystallizer is 130-140m 3 The aerosol cooling is adopted, the electromagnetic stirring frequency of the crystallizer is 3.5Hz, the current is 270A, and the pulling speed is 2.1m/min.
Further, the chemical components of the paint are as follows in percentage by mass: c:0.07%, si:0.61%, mn:1.61%, cr:0.17 percent, ti 0.07 percent, ni:0.68%, mo:0.22%, the balance being Fe and unavoidable impurities, P in the impurities: 0.013%, S:0.006%.
Further, the chemical components of the paint are as follows in percentage by mass: c:0.07%, si:0.54%, mn:1.63%, cr:0.19 percent, ti 0.06 percent, ni:0.67%, mo:0.21%, the balance being Fe and unavoidable impurities, P in the impurities: 0.010%, S:0.005%.
Further, the chemical components of the paint are as follows in percentage by mass: c:0.06%, si:0.57%, mn:1.59%, cr:0.17 percent, ti 0.07 percent, ni:0.65%, mo:0.23%, the balance being Fe and unavoidable impurities, P in the impurities: 0.011%, S:0.005%.
Compared with the prior art, the invention has the beneficial technical effects that:
the mechanical property of the 700MPa welding wire steel produced by the invention is more stable, the tensile strength is higher, the tensile strength of other welding wire steels is generally about 720-740MPa, and the tensile strength of the welding wire steel wire rod produced by the invention can be more than 780 MPa.
Detailed Description
The main preparation process of the titanium-nickel-molybdenum series 700MPa grade welding wire steel in the example comprises the following steps: molten iron desulfurization, converter, LF refining and continuous casting.
Desulfurizing molten iron: blast furnace slag is removed before desulfurization, so that desulfurization efficiency is improved; taking iron ore to be melted into molten iron, desulfurizing the molten iron by adopting a KR method, namely stirring the molten iron by adopting a stirring paddle with the rotating speed of 90r/min, and adding a desulfurizing agent after stirring for 2min, wherein the desulfurizing agent is 9: and (3) mixing lime powder and fluorite according to the mass ratio of 1, stirring and reacting for 10min, and standing for 5min. And after molten iron desulfurization and standing, removing desulfurization slag, stabilizing the desulfurization effect, preventing desulfurization slag from entering a converter to cause converter reversion, and ensuring that the sulfur content in steel is controlled below 0.01%.
And (3) a converter: in order to ensure the quality of the product and the accurate control of the components of the finished product, the requirements of molten iron of a converter are as follows: the content of phosphorus is less than or equal to 0.13 percent and the content of sulfur is less than or equal to 0.050 percent by mass percent. Adding slag-making auxiliary materials such as lime, dolomite, fluorite and the like in the converter smelting process, and adding ferrosilicon, silicomanganese and silicoaluminomanganese for deoxidization alloying according to the component requirements of the finished product in the tapping process.
Refining: the converter molten steel is conveyed to a refining line by a ladle conveyor, 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 the molten steel components and temperature change. In order to ensure the low-carbon requirement of the finished wire rod, LF refining strictly controls the carbon content, and the carbon content is controlled to be 0.05%. After the ladle in the refining process reaches refining, the temperature is measured when the ladle bottom is subjected to soft argon blowing for 5min, and oxygen is fixed after the molten steel stops argon blowing and calm for 1 min. And the activity oxygen is controlled to be 40-50ppm, and the aluminum-free deoxidizer is supplemented when the oxygen is high. Ensures soft blowing for more than 10 minutes, and ensures the uniformity of ladle temperature and the floating of fine inclusions. The oxygen content in the steel directly affects the yield of titanium.
Continuous casting: the water quantity of the crystallizer is 130-140m 3 The aerosol cooling is adopted, the covering slag is special for general purpose, the electromagnetic stirring frequency of a crystallizer is 3.5Hz, the current is 270A, and the pulling speed is 2.1m/min.
TABLE 1 composition and temperature of converter tapping
| Tapping temperature, DEG C | Carbon content of steel tapping, wt% | Phosphorus content of steel tapping, wt% | |
| Example 1 | 1625 | 0.05 | 0.014 |
| Example 2 | 1635 | 0.06 | 0.015 |
| Example 3 | 1630 | 0.05 | 0.013 |
TABLE 2 continuous casting process parameters
| Degree of superheat (. Degree. C.) | Pulling speed (m/min) | |
| Example 1 | 28 | 2.1 |
| Example 2 | 29 | 2.1 |
| Example 3 | 30 | 2.1 |
TABLE 3 finished product composition (wt%, balance iron)
The mechanical properties are shown in Table 4.
TABLE 4 mechanical property test results
| Tensile strength, MPa | Elongation% | Surface shrinkage percentage% | |
| Example 1 | 792 | 37 | 56 |
| Example 2 | 795 | 35 | 55 |
| Example 3 | 805 | 36 | 59 |
| Requirements for | ≥700 | ≥25 | ≥40 |
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 (5)
1. A production method of 700 MPa-level welding wire steel of titanium-nickel-molybdenum series is characterized by comprising the following chemical components in percentage by mass: c is less than or equal to 0.10 percent, si:0.45-0.65%, mn:1.55-1.70%, cr:0.15-0.25%, ti 0.05-0.16%, ni:0.65-0.75%, mo:0.20-0.30%, the balance being Fe and unavoidable impurities, P in the impurities being less than or equal to 0.020%, S being less than or equal to 0.020%; the production steps mainly comprise:
the content of C in the molten steel at the end point of the converter is not less than 0.06 weight percent, and the content of P is not more than 0.025 weight percent; the tapping temperature of the converter is 1620-1640 ℃, and the tapping of the converter adopts an aluminum-free deoxidizer; after the ladle reaches the refining process, soft blowing for more than 10 minutes after the refining process is ensured, and the uniformity of the temperature of the ladle and the floating of fine inclusions are ensured; the superheat degree of continuous casting is set to be 25-35 ℃ and the pulling speed is 2-2.2m/min.
2. The method for producing 700 MPa-level welding wire steel of titanium-nickel-molybdenum system according to claim 1, wherein the main preparation process is: molten iron desulfurization, converter, LF refining and continuous casting; wherein:
desulfurizing molten iron: blast furnace slag is removed before desulfurization, so that desulfurization efficiency is improved; taking iron ore to be melted into molten iron, desulfurizing the molten iron by adopting a KR method, namely stirring the molten iron by adopting a stirring paddle with the rotating speed of 90r/min, and adding a desulfurizing agent after stirring for 2min, wherein the desulfurizing agent is 9:1, mixing lime powder and fluorite according to the mass ratio, stirring and reacting for 10min, and standing for 5min; removing desulfurization slag after molten iron desulfurization and standing, stabilizing desulfurization effect, preventing desulfurization slag from entering a converter to cause converter reversion, and ensuring that the sulfur content in steel is controlled below 0.01%;
and (3) a converter: in order to ensure the quality of the product and the accurate control of the components of the finished product, the requirements of molten iron of a converter are as follows: the content of phosphorus is less than or equal to 0.13 percent and the content of sulfur is less than or equal to 0.050 percent by mass percent; adding slag-making auxiliary materials such as lime, dolomite, fluorite and the like in the converter smelting process, and adding ferrosilicon, silicomanganese and silicoaluminomanganese for deoxidization alloying according to the component requirements of the finished product in the tapping process;
refining: 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; in order to ensure the low-carbon requirement of the finished wire rod, the LF refining strictly controls the carbon content, and the carbon content control target is 0.05%; after the ladle in the refining process reaches refining, the temperature is measured when the ladle bottom is subjected to soft argon blowing for 5min, and oxygen is fixed after the molten steel stops argon blowing and calm for 1 min; the activity oxygen control target is 40-50ppm, and the aluminum-free deoxidizer is supplemented when the oxygen is high; ensuring soft blowing for more than 10 minutes, and ensuring the uniformity of the ladle temperature and the floating of fine inclusions; the oxygen content in the steel directly influences the yield of titanium;
continuous casting: the water quantity of the crystallizer is 130-140m 3 The aerosol cooling is adopted, the covering slag is special for general purpose, the electromagnetic stirring frequency of a crystallizer is 3.5Hz, the current is 270A, and the pulling speed is 2.1m/min.
3. The production method of the titanium-nickel-molybdenum series 700MPa grade welding wire steel according to claim 1, wherein the chemical components of the steel are as follows in percentage by mass: c:0.07%, si:0.61%, mn:1.61%, cr:0.17 percent, ti 0.07 percent, ni:0.68%, mo:0.22%, the balance being Fe and unavoidable impurities, P in the impurities: 0.013%, S:0.006%.
4. The production method of the titanium-nickel-molybdenum series 700MPa grade welding wire steel according to claim 1, wherein the chemical components of the steel are as follows in percentage by mass: c:0.07%, si:0.54%, mn:1.63%, cr:0.19 percent, ti 0.06 percent, ni:0.67%, mo:0.21%, the balance being Fe and unavoidable impurities, P in the impurities: 0.010%, S:0.005%.
5. The production method of the titanium-nickel-molybdenum series 700MPa grade welding wire steel according to claim 1, wherein the chemical components of the steel are as follows in percentage by mass: c:0.06%, si:0.57%, mn:1.59%, cr:0.17 percent, ti 0.07 percent, ni:0.65%, mo:0.23%, the balance being Fe and unavoidable impurities, P in the impurities: 0.011%, S:0.005%.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113943893A (en) * | 2021-09-22 | 2022-01-18 | 包头钢铁（集团）有限责任公司 | Production method of 700 MPa-grade rare earth-containing welding wire steel |
| CN113981305A (en) * | 2021-10-14 | 2022-01-28 | 包头钢铁（集团）有限责任公司 | Production method of titanium microalloyed 700 MPa-grade welding wire steel |
| CN114107593A (en) * | 2021-11-08 | 2022-03-01 | 包头钢铁（集团）有限责任公司 | Production method of 60 kg-grade welding wire steel |
| CN114507819A (en) * | 2022-01-28 | 2022-05-17 | 包头钢铁（集团）有限责任公司 | Production method of vehicle atmospheric corrosion resistant 500MPa grade welding wire steel |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113943893A (en) * | 2021-09-22 | 2022-01-18 | 包头钢铁（集团）有限责任公司 | Production method of 700 MPa-grade rare earth-containing welding wire steel |
| CN113981305A (en) * | 2021-10-14 | 2022-01-28 | 包头钢铁（集团）有限责任公司 | Production method of titanium microalloyed 700 MPa-grade welding wire steel |
| CN114107593A (en) * | 2021-11-08 | 2022-03-01 | 包头钢铁（集团）有限责任公司 | Production method of 60 kg-grade welding wire steel |
| CN114507819A (en) * | 2022-01-28 | 2022-05-17 | 包头钢铁（集团）有限责任公司 | Production method of vehicle atmospheric corrosion resistant 500MPa grade welding wire steel |
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