CN101397624A - Low carbon, low nitrogen and middle titanium iron - Google Patents
Low carbon, low nitrogen and middle titanium iron Download PDFInfo
- Publication number
- CN101397624A CN101397624A CNA2007100463427A CN200710046342A CN101397624A CN 101397624 A CN101397624 A CN 101397624A CN A2007100463427 A CNA2007100463427 A CN A2007100463427A CN 200710046342 A CN200710046342 A CN 200710046342A CN 101397624 A CN101397624 A CN 101397624A
- Authority
- CN
- China
- Prior art keywords
- low
- nitrogen
- carbon
- steel
- ferrotitanium
- 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
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention provides a low-carbon low-nitrogen middle ferrotitanium. The low-carbon low-nitrogen middle ferrotitanium mainly comprises titanium and iron, and also comprises impurity elements such as aluminum, silicon, carbon, nitrogen, phosphorus, sulfur, copper, manganese and the like, the weight percentage of each component is as follows: 38 to 42 percent of titanium, being less than 8.5 percent of aluminum, being equal to or less than 1.5 percent of silicon, being equal to or less than 0.05 percent of carbon, being equal to or less than 0.05 percent of nitrogen, being equal to or less than 0.02 percent of phosphorus, being equal to or less than 0.03 percent of sulfur, being equal to or less than 0.1 percent of copper, being equal to or less than 2 percent of manganese and the residual quantity of iron. The low-carbon low-nitrogen middle ferrotitanium takes titanium concentrates and rutile as raw materials and is obtained by adopting aluminothermy smelting. The low-carbon low-nitrogen middle ferrotitanium has low content of ferrotitanium impurities, especially carbon and nitrogen content is effectively controlled, thus being capable of refining IF steel.
Description
Technical field
The present invention relates to the iron alloy technical field, specifically, the present invention relates to a kind of low-carbon low-nitrogen middle ferrotitanium, this low-carbon low-nitrogen middle ferrotitanium is particularly useful for smelting the IF steel.
Background technology
Extra-deep drawing steel, promptly IF steel (gapless atomic steel) is behind rimming steel, carbon aluminium-killed steel, the best steel plate of world today's a new generation's deep drawability.It is to add an amount of titanium or niobium in Ultra-low carbon, low nitrogen steel, makes carbon, nitrogen interstitial atom in the steel be fixed to carbon, nitrogen compound fully, and atom very close to each other exists in the steel.IF steel plate surface quality is high, its plastic strain ratio r value (plastic anisotropy) reaches more than 1.9, strain-hardening index n reaches 0.27, elongation reaches 50%, has extraordinary drawing performance, and there is not ageing, no yield point elongation, be recent third generation punching press steel with extremely excellent deep drawability newly developed, be specially adapted to stamping parts complex-shaped, that the surface quality requirement is strict especially.
According to different stabilization alloying elements, three types IF steel is arranged, be respectively and contain TI IF steel, contain Nb+Ti IF steel and contain Nb IF steel, the production of these three kinds of IF steel can be adopted continuous annealing and hot dip galvanizing process.In containing Ti IF steel, Ti before purifying carbon earlier will with nitrogen, sulphur combination, so the minimum content of the Ti in the TiIF steel is provided by the following relationship formula: Ti 〉=3.43N+1.5S+4C.In containing Nb+Ti IF steel, add enough Ti and N and form TiN, remaining Nb purifies C with the NbC form.In containing Nb IF steel, C is only purified by Nb, is combined into AlN as for N is then most of with Al.In this three class IF steel, contain the susceptibility minimum of Ti IF steel to composition and technological fluctuation.
The production process route of IF steel is generally: hot metal pretreatment → steel-making by combined-blown converter → RH refining → sheet billet continuous casting → hot continuous rolling → cold rolling, annealing, zinc-plated etc., but since ultra low carbon IF steel deep drawability, surface quality etc. is required high, so the production difficulty is very big.The main difficult point of ultra low carbon IF smelting steel is to obtain Ultra-low carbon and ultralow nitrogen molten steel, obtains the high continuously cast bloom of surface quality.At present; advanced RH vacuum refinement equipment can be reduced to the carbon content in the molten steel below 0.0015%; but it is careless slightly; materials such as the anti-material of ladle, tundish covering flux and crystallizer protecting residue can cause molten steel recarburization about 0.0025～0.0040%; carbon content in the molten steel also increases to more than 0.0050%, completely loses the metallurgical effect of RH refining unit.Bessemerize technology by optimization, the nitrogen content in the molten steel can be reduced to 0.0010～0.0015%, but in casting process, if it is bad that the protection casting takes place, molten steel can nitrogen pick-up 0.0030%, and the nitrogen content in the molten steel can increase to 0.0050%.In these difficult problems on capturing IF steel production technology; the scientific research personnel of Shoudu Iron and Steel Co Institute for Research and Technology and move the technician of steel company around Ultra-low carbon and ultralow nitrogen smelt, gordian techniquies such as the dark carbonization treatment of RH and protection casting tackle key problems; substantially grasped the smelting technology of ultra low carbon IF steel; trial result shows: in normal strand; carbon content is about 0.0030%; p and s content is about 0.0070%; nitrogen and total oxygen content be all below 0.0020%, substantially near the best level of the similar steel grade in the world.Table 1 is the typical chemical ingredients of IF steel.
The typical chemical ingredients of table 1 IF steel
Ultrapure cleanliness (carbon in the molten steel≤0.0030%, nitrogen≤0.0020%) in view of the requirement of IF steel, as important alloy---the ferrotianium of smelting the IF steel, also require its impurities element (particularly carbon, nitrogen, phosphorus, sulphur, element silicon) low as far as possible, otherwise not only can cause secondary pollution, and can influence the unit elongation and the deep drawing quality of finished steel molten steel.
Ferrotianium, especially high ferrotianium is to add the iron remelting with metal titanium to form, as number of patent application is 200610023557.2, the China that name is called " low-nitrogen ferrotitanium and manufacture method thereof and cored-wire " applies for a patent and discloses a kind of low nitrogen iron and manufacture method thereof, this low-nitrogen ferrotitanium foreign matter content (carbon, nitrogen, phosphorus, sulphur etc.) is lower, can satisfy the needs of smelting the IF steel, but this high ferrotianium is to form with the metal titanium remelting, the unit quality cost is smelted ferrotianium up to several times than ilmenite concentrate, can't be extensive use of in smelting the IF steel because of price is high.And the high ferrotianium (70 ferrotianium) that rutile is smelted, its oxygen level is up to 8～12%, and titanium dioxide foreign matter content height owing to require oxygen level≤0.002% in the IF steel, if oxygen level reaches 8～12% in the ferrotianium, obviously can't satisfy the requirement of the product of IF steel.
Also there is direct employing ilmenite concentrate to produce low-Si-Ti-Fe, as the patent No. is 97107131.4, Chinese patent and number of patent application that name is called " preparation method of low-Si-Ti-Fe " are 03113095.X, the China that name is called " low-Si-Ti-Fe and preparation method thereof " applies for a patent, they all provide a kind of preparation method of low-Si-Ti-Fe, be raw material promptly with titanium material waste material and ilmenite concentrate, the melting method that adopts thermite process and remelting process to combine.So-called thermite process is meant in conjunction with remelting process and adds the pure useless titanium of part in the thermite process fusion process, be characterized in that pure useless titanium impurity is few and add with the state of metal titanium, can reduce the add-on of main raw material(s) and reductive agent aluminium, but increased the melting cost greatly, the aluminium content of the low-Si-Ti-Fe of gained is higher in addition, though aluminium is the interstitial atom nitrogen in the steel fixedly, form fine AlN, thereby obtain fine ferrite crystal, guaranteed the toughness of steel plate, but too much aluminium not only can generate thick AlN and cause steel plate toughness deterioration, and can form the needle-like Al of a large amount of disperses in steel
2O
3Inclusion, infringement steel plate endoplasm viability, room temperature deformability and weldability, and above-mentioned two kinds of ferrotianiums do not relate to the control to its nitrogen content, the harm of nitrogen in the IF steel is outstanding especially, it can not only greatly improve the yield strength and the strain hardening rate of steel plate, and can reduce steel plate impelling strength and welding property significantly.
Number of patent application is 200710019619.7, the China that name is called " a kind of ferrotitanium with low carbon, low silicon and preparation technology thereof " applies for a patent and discloses a kind of ferrotitanium with low carbon, low silicon, it mainly contains titanium, aluminium and iron, also contain silicon, carbon, phosphorus, sulphur, copper and manganese, each component weight percent (%) consists of: titanium 45～55, aluminium 8～12, silicon≤1.5, carbon 0.02～0.05, phosphorus≤0.04, sulphur≤0.03, copper 0.05～0.1 and iron surplus, it is a raw material with ilmenite concentrate and rutile, adopt the melting method of thermite process to make, this ferrotitanium with low carbon, low silicon can reduce the smelting cost of titanium alloy, make titanium have utilization ratio preferably, but nitrogen content in the ferrotianium is not done requirement, and its aluminum content is higher equally.
Number of patent application is 200510094826.X, the China that name is called " low-Si-Ti-Fe that is used to smelt Ti-containing steel " applies for a patent and discloses a kind of low-Si-Ti-Fe, its composition is: titanium 38～42%, aluminium 8～12%, silicon 0.8～1.5%, carbon 0.02～0.05%, phosphorus 0.01～0.02%, sulphur 0.01～0.02%, copper 0.1～0.15%, manganese 1.5～2%, iron surplus.This ferrotianium aluminum content is higher, and does not also relate to the requirement to nitrogen content.Require aluminium content≤0.06wt% in the general IF steel, nitrogen content≤0.002wt% because the nitrogen in ferrotianium enters in the molten steel, increases harmful element nitrogen content in the molten steel, very big to the influence of the deep drawability of steel, more aluminium combines generation Al with oxygen in the steel in the ferrotianium simultaneously
2O
3, so the time condition that do not floated, form brittle inclusion and remain in the steel, also worsened the deep drawability of steel.
In order to address the above problem, the present inventor selects low nitrogen capacity slag system by rationally preparing burden, and has made a kind of low-carbon low-nitrogen middle ferrotitanium by the thermite process melting, foreign matter contents such as the carbon in this low-carbon low-nitrogen middle ferrotitanium, nitrogen, sulphur, phosphorus are low, can be used for smelting the IF steel of deep drawability excellence.
The object of the present invention is to provide a kind of low-carbon low-nitrogen middle ferrotitanium.
Summary of the invention
The titaniferous weight percent content of low-carbon low-nitrogen middle ferrotitanium provided by the invention is 38～42%, wherein also contains aluminium, silicon, carbon, nitrogen, phosphorus, sulphur, copper, manganese and iron, the weight percent content of described aluminium and nitrogen is controlled at respectively＜and 8.5% and≤0.05%.
In a preferred implementation: the aluminiferous weight percent content of low-carbon low-nitrogen middle ferrotitanium of the present invention is controlled at≤and 7%.
In another preferred implementation: low-carbon low-nitrogen middle ferrotitanium of the present invention the weight percent content of siliceous, carbon, phosphorus, sulphur, copper, manganese, iron be controlled to be respectively: silicon≤1.5%, carbon≤0.05%, phosphorus≤0.02%, sulphur≤0.03%, copper≤0.1%, manganese≤2%, surplus are iron.
In another preferred implementation: low-carbon low-nitrogen middle ferrotitanium of the present invention siliceous weight percent content be controlled at≤1.15.
Below, the chemical ingredients of low-carbon low-nitrogen middle ferrotitanium of the present invention is done as being described in detail.
Titanium: titanium can combine with interstitial atom carbon, the nitrogen in the steel and form tiny precipitate, the existence of carbon, nitrogen-atoms in the matrix of elimination steel.It combines with C, N in the steel, not only generate stability very high TiC, TiN particle, eliminate C, the N atom of solid solution in the steel, and the TiC, the TiN particle that generate have stronger grain refinement effect and precipitating reinforcing effect, can improve the impelling strength and the welding property of steel plate.The titanium content of low-carbon low-nitrogen middle ferrotitanium of the present invention is controlled to be 38～42wt%.
Carbon: though have the effect of strengthening hardness of steel and hardness, but for the IF steel, increase along with its content, the impelling strength of IF steel is descended, move on brittle transition temperature is obvious, carbon content≤0.003wt% in the general requirement IF steel, therefore carbon content is controlled at≤0.05wt% in the low-carbon low-nitrogen middle ferrotitanium of the present invention.
Aluminium: the fixing interstitial atom nitrogen in the steel, but too much aluminium can combine the needle-like Al that forms a large amount of disperses with the oxygen in the steel
2O
3Inclusion, thus the time condition that do not floated, Al
2O
3To form brittle inclusion and remain in the steel, also worsen the deep drawability of steel, infringement steel plate endoplasm viability, room temperature deformability and weldability.Require aluminium content≤0.06wt% in the general IF steel, the therefore aluminium content＜8.5wt% in ferrotianium then takes aluminium in the steel to less than 0.0255wt%, does not influence the quality of IF steel, more preferably, and the aluminium content≤7wt% of low-carbon low-nitrogen middle ferrotitanium of the present invention.
Nitrogen: nitrogen is a kind of interstitial atom, harm in the IF steel is outstanding especially, because the nitrogen in ferrotianium enters in the molten steel, increase harmful element nitrogen content in the molten steel, it not only can greatly improve the yield strength and the strain hardening rate of steel plate, and will reduce steel plate impelling strength and welding property significantly.Require nitrogen content≤0.002wt% in the general IF steel, but ferrotianium must be nitrogenous in producing, because control method difference, the nitrogen content of final ferrotianium is also different, because the bonding force of titanium and nitrogen is very strong, if the nitrogen content in the ferrotianium is 0.2wt%, the nitrogen content that then enters in the steel is 0.0006wt%, the nitrogen content≤0.05wt% of low-carbon low-nitrogen middle ferrotitanium of the present invention.
Silicon: the strain hardening rate of IF steel, brittle transition temperature can increase along with the increase of silicone content, and simultaneously the stretch percentage elongation of IF steel can descend, so the content of impurity elemental silicon is controlled at≤1.5wt%, and more preferably, silicone content is controlled at≤1.15wt%.
Phosphorus, sulphur: inevitably harmful inclusion in the steel, stretch percentage elongation infringement to the IF steel is very big, require their content low more good more in theory, the phosphorus content and the sulphur content of low-carbon low-nitrogen middle ferrotitanium of the present invention are controlled to be respectively: phosphorus≤0.02wt%, sulphur≤0.03wt%.
Copper, manganese: the existence of copper, manganese make steel solidify or heat-processed such as hot-work in generate low-melting material and separate out at crystal boundary, easily produce intergranular crack.Require Cu content low more good more in the general IF steel, manganese≤0.2wt%, so the copper content of low-carbon low-nitrogen middle ferrotitanium of the present invention and manganese content are controlled to be respectively: copper≤0.1wt%, manganese≤2wt%.
Low-carbon low-nitrogen middle ferrotitanium of the present invention is a raw material with ilmenite concentrate and rutile, adopts the thermite process melting to make.Concrete grammar carries out according to following steps: (1) is selected materials on request, is toasted; (2) distinguish compounding major ingredient, refining material and priming mixture by weight ratio, major ingredient is made up of ilmenite concentrate, rutile, aluminum shot, iron phosphorus, lime, fluorite, heat-generating agent, the refining material is made up of aluminum shot, iron phosphorus, lime, fluorite, heat-generating agent, and priming mixture is made up of aluminum shot, iron phosphorus, SODIUMNITRATE; (3) bed material that a certain amount of major ingredient and priming mixture are formed drops into smelting furnace, with the flourishing priming mixture that excites; (4) question response drops into major ingredient after forming the molten bath in smelting furnace; (5) treat that major ingredient reaction finishes after, add the refining material; (6) add top of the slag retardant lime powder; (7) deslagging, cooling, finishing screening.
In the fusion process of ferrotianium of the present invention, taked certain measure to prevent that excessive nitrogen, aluminium, silicon, carbon and other impurity from entering wherein: the present invention is promptly controlled by the add-on of aluminium in the thermite process by the aluminum content in the rational Charge Mixture Control ferrotianium; Carbon content by control raw material (ilmenite concentrate, rutile, lime) reaches low carbon content in the ferrotianium; By selecting low SiO
2Ilmenite concentrate and rutile to reduce silicone content in the ferrotianium, have only SiO
2Content is low, could reduce silicon and enter in the product, improves basicity of slag simultaneously and suppresses the reduction of silicon-dioxide to reach the purpose of silicon content in the control ferrotianium; Select the slag (main component: Al of low nitrogen capacity slag system
2O
360～70%, CaO 5～10%, CaF
23～5%), this slag has characteristics such as low melting point, high-density, low solubility, and is very weak to the dissolving power of nitrogen, can prevent effectively that slag from sucking the nitrogen in the atmosphere, thereby in the prevention atmosphere nitrogen in slag, shift and slag in nitrogen in ferrotianium, shift, in addition, the fluorite (CaF in the slag
2) can reduce slag melting and do not reduce basicity, prevent or reduce the slag system that nitrogen enters thereby form.
Beneficial effect of the present invention is: because impurity contents such as the carbon in the low-carbon low-nitrogen middle ferrotitanium of the present invention, nitrogen, sulphur, phosphorus have obtained effective control, content is all very low, therefore can be used for smelting the IF steel of deep drawability excellence fully.
Embodiment
Below for a more detailed description with embodiment to the present invention.These embodiment only are the descriptions to best mode for carrying out the invention, scope of the present invention are not had any restriction.
Embodiment 1
1, equipment:
Reverberatory furnace, rotary drum mixer, intermediate bunker, smelting furnace etc.
2, ingredient requirement:
Ilmenite concentrate: TiO
2〉=50%, SiO
2≤ 1.2%, ∑ Fe≤35%, C, S, P are all≤0.02%;
Rutile: TiO
2〉=90%, SiO
2≤ 1.5%, C, S, P are all≤0.02%;
Aluminum shot: Al 〉=99%, Si≤0.5%, granularity 0.9～0.12mm (20～120 order);
Iron phosphorus: ∑ Fe 〉=65%, Si≤1.5%, granularity≤0.9mm (20 order);
Lime: CaO 〉=90%, C≤0.2%, granularity≤2mm (10 order);
Fluorite: CaF
2〉=90%, granularity≤2mm (10 order);
Potcrate: KClO
3〉=99.5%, granularity≤2mm (10 order).
3, raw material is formed:
Above raw material, be divided into different operation materials by following proportioning and step, use for subsequent operations.
Major ingredient: ilmenite concentrate: rutile: aluminum shot: iron phosphorus: lime: fluorite: Potcrate is 70:30:45.5:3.6:9.4:3.8:2.8;
Refining material: aluminum shot: iron phosphorus: lime: fluorite: Potcrate is 2.7:7:1:0.3:1;
Priming mixture: aluminum shot: iron phosphorus: SODIUMNITRATE is 5:6:4.
4, smelting operation:
With the above operation materials that prepare according to the following steps, carry out smelting operation:
In smelting furnace, at first make a magnesia nest, in the magnesia nest, put into major ingredient then as " bed material " and priming mixture, adopt the lower point pyrogenic process, excite priming mixture to cause the reaction of bed material with " flourishing ", continue to add major ingredient after the bed material reaction forms the molten bath, amount and adding speed that major ingredient adds should increase along with the expansion in molten bath and accelerate, and add until major ingredient.
After treating that above-mentioned melting reaction finishes, add the refining material immediately fast and equably.When the refining material in smelting furnace, react finish after, promptly in smelting furnace, add lime powder, its objective is to make top of the slag slow setting, be beneficial to that gas remaining in the stove is got rid of smoothly and the abundant sedimentation of ferrotianium pearl, bleed off the waste residue in the smelting furnace after for some time.Melting finishes, treat the finished product naturally cooling in the smelting furnace after, further water-cooled send Runout area to carry out finishing, screening, packing then again.
By above method, the low-carbon low-nitrogen middle ferrotitanium that melting obtains, the result is as follows for its finished product chemical composition analysis:
Titanium: 40.12wt%, aluminium: 8.05wt%, copper: 0.1wt%, manganese: 0.64wt%, silicon: 1.13wt%, carbon: 0.028wt%, nitrogen: 0.032wt%, phosphorus: 0.015wt%, sulphur: 0.016wt%, iron surplus.
Embodiment 2
Implementation method is with embodiment 1.
Wherein raw material consists of:
Major ingredient: ilmenite concentrate: rutile: aluminum shot: iron phosphorus: lime: fluorite: Potcrate is 68:29:48:3.4:9.6:3.4:2.5;
Refining material: aluminum shot: iron phosphorus: lime: fluorite: Potcrate is 2.9:7:1:0.5:1.2;
Priming mixture: aluminum shot: iron phosphorus: SODIUMNITRATE is 5:6:4.
The low-carbon low-nitrogen middle ferrotitanium that melting obtains, the result is as follows for its finished product chemical composition analysis:
Titanium: 38.06wt%, aluminium: 8.2wt%, copper: 0.1wt%, manganese: 0.70wt%, silicon: 1.1wt%, carbon: 0.022wt%, nitrogen: 0.035wt%, phosphorus: 0.017wt%, sulphur: 0.018wt%, iron surplus.
Embodiment 3
Implementation method is with embodiment 1.
Wherein raw material consists of:
Major ingredient: ilmenite concentrate: rutile: aluminum shot: iron phosphorus: lime: fluorite: Potcrate is 71.5:30:45.5:3.7:9.4:3.7:2.7;
Refining material: aluminum shot: iron phosphorus: lime: fluorite: Potcrate is 2.65:6.8:1:0.5:1;
Priming mixture: aluminum shot: iron phosphorus: SODIUMNITRATE is 5:6:4.
The low-carbon low-nitrogen middle ferrotitanium that melting obtains, the result is as follows for its finished product chemical composition analysis:
Titanium: 39.6wt%, aluminium: 7.24wt%, copper: 0.08wt%, manganese: 0.85wt%, silicon: 1.24wt%, carbon: 0.026wt%, nitrogen: 0.03wt%, phosphorus: 0.017wt%, sulphur: 0.02wt%, iron surplus.
Embodiment 4
Implementation method is with embodiment 1.
Wherein raw material consists of:
Major ingredient: ilmenite concentrate: rutile: aluminum shot: iron phosphorus: lime: fluorite: Potcrate is 70.5:28:45:3.5:9.4:3.7:2.8;
Refining material: aluminum shot: iron phosphorus: lime: fluorite: Potcrate is 2.8:6.7:1.2:0.4:1.1;
Priming mixture: aluminum shot: iron phosphorus: SODIUMNITRATE is 5:6:4.
The low-carbon low-nitrogen middle ferrotitanium that melting obtains, the result is as follows for its finished product chemical composition analysis:
Titanium: 41.15wt%, aluminium: 6.8wt%, copper: 0.08wt%, manganese: 0.65wt%, silicon: 1.4wt%, carbon: 0.03wt%, nitrogen: 0.028wt%, phosphorus: 0.014wt%, sulphur: 0.017wt%, iron surplus.
Embodiment 5
Implementation method is with embodiment 1.
Wherein raw material consists of:
Major ingredient: ilmenite concentrate: rutile: aluminum shot: iron phosphorus: lime: fluorite: Potcrate is 73:30:44:3.6:9.3:3.85:2.7;
Refining material: aluminum shot: iron phosphorus: lime: fluorite: Potcrate is 2.9:7:1.05:0.5:1;
Priming mixture: aluminum shot: iron phosphorus: SODIUMNITRATE is 5:6:4.
The low-carbon low-nitrogen middle ferrotitanium that melting obtains, the result is as follows for its finished product chemical composition analysis:
Titanium: 41.8wt%, aluminium: 7.25wt%, copper: 0.1wt%, manganese: 0.68wt%, silicon: 1.3wt%, carbon: 0.032wt%, nitrogen: 0.025wt%, phosphorus: 0.018wt%, sulphur: 0.02wt%, iron surplus.
Embodiment 6
Implementation method is with embodiment 1.
Wherein raw material consists of:
Major ingredient: ilmenite concentrate: rutile: aluminum shot: iron phosphorus: lime: fluorite: Potcrate is 66:31:43:3.8:9.6:3.9:3.0;
Refining material: aluminum shot: iron phosphorus lime: fluorite: Potcrate is 2.5:7:1:0.5:1;
Priming mixture: aluminum shot: iron phosphorus: SODIUMNITRATE is 5:6:4.
The low-carbon low-nitrogen middle ferrotitanium that melting obtains, the result is as follows for its finished product chemical composition analysis:
Titanium: 40.6wt%, aluminium: 6.7wt%, copper: 0.07wt%, manganese: 0.7wt%, silicon: 1.05wt%, carbon: 0.032wt%, nitrogen: 0.042wt%, phosphorus: 0.02wt%, sulphur: 0.02wt%, iron surplus.
Claims (4)
1, a kind of low-carbon low-nitrogen middle ferrotitanium, it is characterized in that, the titaniferous weight percent content of described low-carbon low-nitrogen middle ferrotitanium is 38～42%, contains aluminium, silicon, carbon, nitrogen, phosphorus, sulphur, copper, manganese and iron, the weight percent content of described aluminium and nitrogen is controlled at respectively＜and 8.5% and≤0.05%.
2, low-carbon low-nitrogen middle ferrotitanium according to claim 1 is characterized in that, the weight percent content of described aluminium is controlled at≤and 7%.
3, low-carbon low-nitrogen middle ferrotitanium according to claim 1, it is characterized in that, the weight percent content of described silicon, carbon, phosphorus, sulphur, copper, manganese, iron is controlled to be respectively: silicon≤1.5%, carbon≤0.05%, phosphorus≤0.02%, sulphur≤0.03%, copper≤0.1%, manganese≤2%, surplus are iron.
4, according to claim 1 or 3 described low-carbon low-nitrogen middle ferrotitanium, it is characterized in that, the weight percent content of described silicon is controlled at≤and 1.15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100463427A CN101397624A (en) | 2007-09-25 | 2007-09-25 | Low carbon, low nitrogen and middle titanium iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100463427A CN101397624A (en) | 2007-09-25 | 2007-09-25 | Low carbon, low nitrogen and middle titanium iron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101397624A true CN101397624A (en) | 2009-04-01 |
Family
ID=40516466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100463427A Pending CN101397624A (en) | 2007-09-25 | 2007-09-25 | Low carbon, low nitrogen and middle titanium iron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101397624A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107382344A (en) * | 2017-08-09 | 2017-11-24 | 佘云锋 | A kind of efficiently adhesive type high-titanium furnace protection stemming |
| CN112775436A (en) * | 2020-12-22 | 2021-05-11 | 西安交通大学 | Manufacturing method for promoting titanium alloy additive manufacturing process to generate isometric crystals |
| CN114293090A (en) * | 2022-01-07 | 2022-04-08 | 鞍钢股份有限公司 | Method for controlling manganese content in smelting titanium-containing steel in vacuum induction furnace |
| CN114351034A (en) * | 2022-01-07 | 2022-04-15 | 鞍钢股份有限公司 | Method for controlling carbon and nitrogen content in smelting high-titanium steel by vacuum induction furnace |
-
2007
- 2007-09-25 CN CNA2007100463427A patent/CN101397624A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107382344A (en) * | 2017-08-09 | 2017-11-24 | 佘云锋 | A kind of efficiently adhesive type high-titanium furnace protection stemming |
| CN112775436A (en) * | 2020-12-22 | 2021-05-11 | 西安交通大学 | Manufacturing method for promoting titanium alloy additive manufacturing process to generate isometric crystals |
| CN114293090A (en) * | 2022-01-07 | 2022-04-08 | 鞍钢股份有限公司 | Method for controlling manganese content in smelting titanium-containing steel in vacuum induction furnace |
| CN114351034A (en) * | 2022-01-07 | 2022-04-15 | 鞍钢股份有限公司 | Method for controlling carbon and nitrogen content in smelting high-titanium steel by vacuum induction furnace |
| CN114351034B (en) * | 2022-01-07 | 2022-08-16 | 鞍钢股份有限公司 | Method for controlling carbon and nitrogen content in smelting high-titanium steel by vacuum induction furnace |
| CN114293090B (en) * | 2022-01-07 | 2022-10-18 | 鞍钢股份有限公司 | Method for controlling manganese content in smelting titanium-containing steel in vacuum induction furnace |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110923585B (en) | 500MPa hot-rolled refractory steel bar and manufacturing method thereof | |
| CN108368573B (en) | High-strength stainless steel sheet having excellent fatigue characteristics and method for producing same | |
| US5972129A (en) | Process for smelting a titanium steel and steel obtained | |
| CN110541108B (en) | Nb and V composite 700MPa grade high-strength anti-seismic steel bar steel and production method thereof | |
| CN102268608B (en) | Large capacity high pressure gas cylinder steel and production method thereof | |
| WO2023056792A1 (en) | Magnesium-containing steel 45 and preparation process therefor | |
| CN107574385B (en) | A kind of process improving bistable ferrite stainless steel continuous casting billet equiaxial crystal ratio | |
| CN106811684B (en) | 750Mpa grades of container hot rolled steel plates of yield strength and its manufacturing method | |
| CN101492757B (en) | Calcium-silicon alloy metallurgical material | |
| CN112301186B (en) | Alloy cored wire and application thereof in oxide metallurgy | |
| CN101397624A (en) | Low carbon, low nitrogen and middle titanium iron | |
| CN110029264A (en) | A kind of low cost 40CrV tool steel and its production method | |
| CN112593138A (en) | Production process of high-strength vanadium-titanium steel bar | |
| CN103498099A (en) | Thick-gauge steel plate with excellent low-temperature aging performance, and manufacturing method thereof | |
| CN102732778A (en) | 340MPa-grade high-strength cold-rolled steel plate used for deep-drawing, and production method thereof | |
| JP7223210B2 (en) | Precipitation hardening martensitic stainless steel sheet with excellent fatigue resistance | |
| CN102166642A (en) | Method for controlling morphologies of inclusions in cast structure of steel | |
| JPH11343516A (en) | Titanium killed steel product having good surface property and its production | |
| CN115029631A (en) | High-strength and high-toughness steel for wind power transmission gear and manufacturing method thereof | |
| CN111154945B (en) | Control method for liquated nitrides in Ti and V microalloyed aluminum deoxidized sulfur-containing non-quenched and tempered steel | |
| JP2003027188A (en) | Invar alloy for shadow mask and production method therefor | |
| CN102766801A (en) | Rare earth Al-Ca-Fe alloy for rare earth micro-treated steel and preparation method thereof | |
| JP2008266706A (en) | Method for continuously casting ferritic stainless steel slab | |
| CN1284868C (en) | Composite deoxidant silicon aluminium barium calcium manganese iron ally for steel making and its preparation method | |
| CN112877596B (en) | Method for replacing B in European standard S450J0 steel plate with Cr and method for manufacturing Cr-containing S450J0 steel plate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090401 |