CN107675078A - The steel of nitrogen containing vanadium and its production method and purposes of a kind of high-yield strength - Google Patents
The steel of nitrogen containing vanadium and its production method and purposes of a kind of high-yield strength Download PDFInfo
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- CN107675078A CN107675078A CN201710880757.8A CN201710880757A CN107675078A CN 107675078 A CN107675078 A CN 107675078A CN 201710880757 A CN201710880757 A CN 201710880757A CN 107675078 A CN107675078 A CN 107675078A
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- vanadium
- nitrogen
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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
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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
- C22C33/06—Making ferrous alloys by melting using master alloys
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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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
Abstract
The invention discloses a kind of nitrogen containing vanadium of high-yield strength steel and its production method and purposes, mass percent shared by v element is 0.028~0.037% in the steel, and the mass ratio of vanadium nitrogen is (3.17~3.77):1.00；Its production method is：Deoxidier is added during tapping, adds carburant；Tap 1/4 when add VN alloy, then add carborundum, ferrosilicon, silicomanganese, rich nitrogen alloy, tapping 3/4 when whole alloy add.Desired proportions of the present invention according to vanadium nitrogen, rich nitrogen alloy nitrogen pick-up is added, the original vanadium in solid solution condition is largely transformed into the vanadium of precipitation state, dramatically increases the quantity of vanadium nitride precipitated phase, so as to give full play to the effect of the precipitation hardening of vanadium, reach the purpose for improving steel yield strength.
Description
Technical field
The invention belongs to special steel material field, and in particular to the steel of nitrogen containing vanadium and its production method of a kind of high-yield strength
And purposes.
Background technology
The steel of high-yield strength use primarily as anti-seismic steel, used in the special neck such as skyscraper, bridge, tunnel
Domain.
At present, production 400MPa levels, 500MPa grade high-strength spirals only rely on C, Si and Mn and are extremely difficult to require, must
It must be possible to reach standard requirement by adding other microalloy elements.Nb, V and Ti are more commonly used microalloying members
Element.Because these elements easily form carbonitride particle, suppress crystal grain and grow up, or be solid-solution among matrix, analysis can be played
Go out the effect of reinforcing, refined crystalline strengthening and solution strengthening.Can be made by adding Nb, V and Ti spiral intensity rise to it is new
Step.Therefore, many production screw-thread steel producers domestic at present endeavour research and utilization microalloying to improve high-strength anti-seismic steel bar
Performance.
The content of the invention
In order to further improve the yield strength of steel, primary and foremost purpose of the invention is to provide a kind of steel of nitrogen containing vanadium,
Look for another way from steel vanadium nitrogen ratio start with, grope the optimal proportion of vanadium nitrogen, so as to optimize the precipitation shape of vanadium
State, increase the precipitation strength effect of vanadium, the original vanadium in solid solution condition is largely transformed into the vanadium of precipitation state, make vanadium nitride
The quantity of precipitated phase dramatically increases, and so as to give full play to the effect of the precipitation hardening of vanadium, improves steel yield strength.
Another object of the present invention is to provide the production method of the above-mentioned steel of nitrogen containing vanadium.
It is still another object of the present invention to provide the purposes of the above-mentioned steel of nitrogen containing vanadium.
The purpose of the present invention is achieved through the following technical solutions：
A kind of steel of nitrogen containing vanadium, mass percent shared by v element are 0.028~0.037%, the mass ratio of vanadium nitrogen
It is (3.17~3.77):1.00, the yield strength of gained steel can reach higher level under the scope；
Preferably, the mass ratio of vanadium nitrogen is (3.40~3.64):1.00, the scope is the reason of technique effect and cost
Think binding site；It is particularly preferred that the mass ratio of vanadium nitrogen is 3.52:1.00；
The content of other elements meets related national regulations in steel；
Preferably, the mass percent of other elements is respectively C in steel：0.210~0.25%, Si：0.35~
0.60%, Mn：1.15~1.60%, P：≤ 0.045%, S：≤ 0.045%.
The production method of the above-mentioned steel of nitrogen containing vanadium, comprises the following steps：
(1) according to the total amount of the batch steel, the content of used vanadium in vanadium nitrogen alloy nitrogen and required
Vanadium unit cellulose content, calculate the dosage of VN alloy；In conjunction with nitrogen in used rich nitrogen alloy (also known as nitrogenized manganese silicon)
Content and required vanadium nitrogen mass ratio, calculate the dosage of rich nitrogen alloy；
(2) steelmaking feed adds deoxidier by smelting, during tapping, adds carburant；Tap 1/4 when add vanadium nitrogen and close
Gold, then add carborundum, ferrosilicon, silicomanganese, rich nitrogen alloy, tapping 3/4 when whole alloy add；
The preferred Si-Al-Ba alloy of deoxidier in step (2)；
The dosage of deoxidier, carburant, carborundum, ferrosilicon, silicomanganese in step (2) etc. has depended on other elements in steel
Content, therefore with reference to the production specification of the regulation in corresponding national standard or prior art add.
The present invention principle be：Prior art is only using the steel of VN alloy production high-yield strength, nitrogen in steel content
Deficiency, it is not sufficient enough to play the Precipitation effect of vanadium.It is former after the present invention adds VN alloy and rich nitrogen alloy in steel
To be in the vanadium that the vanadium of solid solution condition is largely transformed into precipitation state, dramatically increase the quantity of vanadium nitride precipitated phase, so as to fill
The precipitation hardening effect of vanadium has been waved in distribution.Meanwhile vanadium nitride in austenite to the analysis during ferritic transformation in boundary
Go out, effectively prevent ferrite crystal grain to grow up, serve the effect of fining ferrite grains.Therefore, VN alloy adds rich nitrogen again
Alloy is mainly the influence for passing through in steel the Precipitation Kinetics after nitrogen pick-up to vanadium, optimizes the precipitation state of vanadium, adds vanadium
Precipitation strength effect, and the effect such as refined crystalline strengthening effect thus brought, so as to improve the yield strength of steel.
The steel of nitrogen containing vanadium of the present invention have higher yield strength, are suitable as anti-seismic steel use, are built used in high level
Build, the special dimension such as bridge, tunnel.
The present invention is had the following advantages relative to prior art and effect：
Desired proportions of the present invention according to vanadium nitrogen, add rich nitrogen alloy nitrogen pick-up, make the original vanadium for being in solid solution condition
A large amount of vanadium for being transformed into precipitation state, dramatically increase the quantity of vanadium nitride precipitated phase, so as to give full play to the Precipitation of vanadium
Invigoration effect, reach the purpose for improving steel yield strength.
Embodiment
With reference to embodiment, the present invention is described in further detail, but the implementation of the present invention is not limited to this.
Embodiment
A kind of production method of high yield degree steel of nitrogen containing vanadium, comprises the following steps：
(1) production is located at certain production line progress of Yangjiang city in applicant, and VN alloy is not added with steel-making smelting
Detected with the steel grade steel test of rich nitrogen alloy, nitrogen content is 35ppm in steel；
(2) mass content for designing vanadium in steel is about 0.032%, with reference to the vanadium nitrogen content of used VN alloy
(table 1), VN alloy 45kg should be added by calculating every stove molten steel；Note：Per 115 tons of stove molten steel amount, more than molten steel, vanadium amount is about
0.003%.
Table 1：Vanadium nitrogen content (mass percent) in VN alloy
After adding above-mentioned VN alloy, nitrogen content rises to 69ppm in steel；
(3) rich nitrogen alloy 30kg, 40kg, 50kg, 60kg are separately added into per stove again.Rich its constituent content of nitrogen alloy used
As shown in table 2；
Table 2：Constituent content (mass percent) in rich nitrogen alloy
(4) deoxidier is added according to step (2) and the result of calculation of (3), during tapping, adds carburant；Tap 1/4 when
Add VN alloy, then add carborundum, ferrosilicon, silicomanganese, rich nitrogen alloy, tapping 3/4 when whole alloy add.
The composition of obtained steel is as shown in table 3：
Table 3：The Composition Control (mass percent) of the present embodiment steel
Note：National standard in table refers to hot rolled ribbed bars national standard GB1499.2-2007, wherein nitrogen≤0.012%
Comparative example
A kind of production method of high-yield strength nitrogen containing vanadium steel, except not including step (3), other steps and embodiment
It is identical, i.e., rich nitrogen alloy is not added, and nitrogen content is 69ppm in steel.
Production line, steelmaking feed, VN alloy all same used by comparative example.
The yield strength of steel is shown in Table 4 obtained by embodiment and comparative example.
Table 4：The yield strength of steel obtained by embodiment and comparative example
From table 4, when comparative example does not add rich nitrogen alloy, nitrogen in steel content is only 69ppm, and steel yield strength is only
436Mpa, low strength.
When rich nitrogen alloy addition is 30kg/ stoves, nitrogen in steel content is 85ppm, and steel yield strength is 447Mpa, by force
The level close to desired value is spent, can substantially be used.
When rich nitrogen alloy addition is 40kg/ stoves, nitrogen in steel content is 91ppm, and steel yield strength is 451Mpa, by force
Degree control reaches target control 450Mpa level, is most perfect condition.
When rich nitrogen alloy addition is more than 50kg/ stoves, average nitrogen is contained in more than 97ppm in steel, and steel surrender is strong
Degree is also in 452-453Mpa, is the essentially identical of 91ppm with nitrogen content, and intensity improves and unobvious.But rich nitrogen alloy
Dosage adds, and the production cost of enterprise also increases, and in terms of enterprise production and management angle, cost performance is bad.
Therefore, analyzed by lot of experiments and application data, be that technique effect is (main when steel nitrogen content is 88~94ppm
Refer to yield strength) and cost preferable binding site, the mass ratio of its corresponding vanadium nitrogen is (3.40~3.64):1.00；
And among these using vanadium nitrogen mass ratio as 3.52:It is 1.00 ideal.
Above-described embodiment is the preferable embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any Spirit Essences without departing from the present invention with made under principle change, modification, replacement, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (8)
- A kind of 1. steel of nitrogen containing vanadium, it is characterised in that：Mass percent shared by v element is 0.028~0.037%, vanadium nitrogen Mass ratio be (3.17~3.77):1.00.
- 2. the steel of nitrogen containing vanadium according to claim 1, it is characterised in that：The mass ratio of the vanadium nitrogen be (3.40~ 3.64):1.00。
- 3. the steel of nitrogen containing vanadium according to claim 1, it is characterised in that：The mass ratio of the vanadium nitrogen is 3.52: 1.00。
- 4. the steel of nitrogen containing vanadium according to claim 1, it is characterised in that：The mass percent difference of other elements in steel For C：0.210~0.25%, Si：0.35~0.60%, Mn：1.15~1.60%, P：≤ 0.045%, S：≤ 0.045%.
- 5. the production method of the steel of nitrogen containing vanadium described in claim any one of 1-4, it is characterised in that comprise the following steps：(1) according to the total amount of the batch steel, the content of used vanadium in vanadium nitrogen alloy nitrogen and required vanadium unit Cellulose content, calculate the dosage of VN alloy；Content and required vanadium in conjunction with nitrogen in used rich nitrogen alloy The mass ratio of nitrogen, calculate the dosage of rich nitrogen alloy；(2) steelmaking feed adds deoxidier by smelting, during tapping, adds carburant；Tap 1/4 when add VN alloy, Then add carborundum, ferrosilicon, silicomanganese, rich nitrogen alloy, tapping 3/4 when whole alloy add.
- 6. production method according to claim 5, it is characterised in that：Deoxidier in step (2) is Si-Al-Ba alloy.
- 7. application of the steel of nitrogen containing vanadium as anti-seismic steel described in claim any one of 1-4.
- 8. application of the steel of nitrogen containing vanadium in skyscraper, bridge, tunnel described in claim any one of 1-4.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108823355A (en) * | 2018-08-22 | 2018-11-16 | 达力普石油专用管有限公司 | A method of improving the v n micro alloying nitrogen in steel rate of recovery |
| CN110699595A (en) * | 2019-11-20 | 2020-01-17 | 曲靖促创科技有限公司 | Hot rolling process for reinforcing steel bar |
| CN113981303A (en) * | 2021-09-23 | 2022-01-28 | 阳春新钢铁有限责任公司 | High-yield-strength vanadium-nitrogen-containing steel and production method thereof |
| CN115627410A (en) * | 2022-10-31 | 2023-01-20 | 南京钢铁股份有限公司 | Control method for designing vanadium-nitrogen alloy to meet requirement of deformed steel bar for nuclear power building |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110699595A (en) * | 2019-11-20 | 2020-01-17 | 曲靖促创科技有限公司 | Hot rolling process for reinforcing steel bar |
| CN113981303A (en) * | 2021-09-23 | 2022-01-28 | 阳春新钢铁有限责任公司 | High-yield-strength vanadium-nitrogen-containing steel and production method thereof |
| CN115627410A (en) * | 2022-10-31 | 2023-01-20 | 南京钢铁股份有限公司 | Control method for designing vanadium-nitrogen alloy to meet requirement of deformed steel bar for nuclear power building |
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