CN104032087A - Vanadium-containing weathering steel, cored wire containing titanium-iron alloy and fluorite, application of cored wire, molten steel and preparation method of molten steel - Google Patents
Vanadium-containing weathering steel, cored wire containing titanium-iron alloy and fluorite, application of cored wire, molten steel and preparation method of molten steel Download PDFInfo
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Abstract
The invention provides a cored wire containing a titanium-iron alloy and fluorite and an application thereof. The cored wire comprises a core and an outer layer wrapping the core, wherein the core is a mixture containing a vanadium-iron alloy, silicon-manganese nitride, the titanium-iron alloy and fluorite. The invention provides molten steel and a preparation method thereof. The method comprises the step of feeding the cored wire into the molten steel to be subjected to vanadium-nitrogen alloying to carry out vanadium-nitrogen alloying. The invention provides vanadium-containing weathering steel. The cored wire is used for achieving vanadium-nitrogen alloying of the molten steel, can effectively increase the nitrogen content according to the requirements, without affecting the vanadium content, and can produce vanadium-containing weathering steel with higher nitrogen content according to the requirement of the molten steel. The steel obtained after casting the vanadium-nitrogen alloyed molten steel obtained by carrying out vanadium-nitrogen alloying on the molten steel by adopting the cored wire has high yield strength, and the relative corrosion rate of steel can not be affected.
Description
Technical field
The present invention relates to a kind of containing ferro-titanium and the cored-wire of fluorite and the application in molten steel VN alloy thereof, and a kind of molten steel and preparation method thereof, and a kind of containing vanadium weathering steel.
Background technology
Micro-alloyed steel mainly refers to that in steel certain element that adds little amount or trace just can obviously carry high performance steel, particularly improves the intensity index of steel.Under prior art condition, micro-alloyed steel mainly obtains by adding little amount or trace vanadium, niobium and titanium.The mechanism of action of microalloying is: add after molten steel as micro-vanadium, niobium and titanium, carbon and nitrogen in molten steel are combined, form carbon, nitrogen compound particle, be V (C, N), Nb (C, N) and Ti (C, N) particle, these particles have certain precipitation strength and the effect of grain refining, can significantly improve the intensity of steel.
Known according to above-mentioned microalloy principle, micro-alloyed steel relates to the chemical element that will control and mainly contains vanadium, niobium, titanium, carbon and nitrogen.Generally in molten steel, do not have vanadium, niobium and titanium elements, the form that conventionally need to add with alloy realizes; Carbon can be by adding certain graphite, hard coal or carbon dust to obtain; Generally the nitrogen in molten steel is the harmful element that does not need existence, but be very important beneficial element at microalloy nitrogen in steel, it is inadequate only relying on nitrogen content residual in molten steel, generally adopt converter smelting steel, residual nitrogen content is within the scope of 0.004%-0.06%, adopt electrosmelting steel, residual nitrogen content, within the scope of 0.06%-0.08%, can be realized by adding nitrogenous class alloy in necessary situation.
In micro-alloyed steel, increasing in early days nitrogen, is to realize by adding the nitrogenize class alloy of 3%-6%, but because nitrogenize class alloy is nitrogenous very low, cause alloy addition large and, recovery rate is unstable, is replaced gradually by the higher alloy of vanadium nitride of nitrogen content.In the production of micro-alloyed steel, be almost difficult to re-use the nitrogenize class alloy of 3%-6% in front, almost all use containing vanadium and nitrogen content high alloy of vanadium nitride again.
Alloy of vanadium nitride mainly contains VN12, VN14 and tri-trades mark of VN16.Generally the ratio of these three trade mark nitrogen and vanadium is basic fixing, is respectively 12:78 (N:V); 14:78 (N:V); 16:78 (N:V), the ratio of nitrogen and vanadium is up to the 16:78 of VN16, in alloy, contains 16% N, contains 78% vanadium.Although alloy of vanadium nitride is high again containing vanadium and nitrogen content, for micro-alloying technology route, particularly composite micro-alloyed steel different in micro-alloyed steel, for example V-Ti-N, V-Ti-Nb-N even, also can not satisfy the demands.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of cored-wire that contains vanadium and nitrogen for realizing the alloying of molten steel vanadium and nitrogen, in this kind of cored-wire, contained nitrogen is not by obtaining with addition of VN alloy, but by obtaining with addition of other nitrogenous higher nitride separately, and find to use this nitrogenate can't affect the relative corrosion rate of steel.
For realizing aforementioned object, according to a first aspect of the invention, the invention provides a kind of cored-wire containing ferro-titanium and fluorite, this cored-wire comprises: the skin of sandwich layer and the described sandwich layer of parcel, wherein, described sandwich layer is the mixture that contains ferro-vanadium, nitrogenize silicomanganese, ferro-titanium and fluorite.
According to a second aspect of the invention, the invention provides the application of cored-wire of the present invention in molten steel VN alloy.
According to a third aspect of the invention we, the invention provides a kind of preparation method of molten steel, the method comprises: cored-wire of the present invention is fed in the molten steel for the treatment of VN alloy and carries out VN alloy.
According to a forth aspect of the invention, the invention provides the molten steel obtaining according to the preparation method of molten steel of the present invention.
According to a fifth aspect of the invention, the invention provides a kind of vanadium weathering steel that contains, wherein, should be formed by molten steel casting of the present invention containing vanadium weathering steel.
Cored-wire of the present invention, for realizing the alloying of molten steel vanadium and nitrogen, can effectively increase nitrogen content and not affect content of vanadium according to needs, can in the situation that molten steel needs, produce nitrogen content higher containing vanadium weathering steel.And it is high to adopt cored-wire of the present invention to carry out the steel yield strength that obtains after VN alloy molten steel casting that molten steel VN alloy obtains.
The usefulness of the technology of the present invention is, can be molten steel more nitrogen content is provided, and is adapted to especially produce containing the composite micro-alloyed steel of vanadium, titanium and niobium, and the steel obtaining can ensure that relative corrosion rate remains unchanged substantially and yield strength improves greatly.
Other features and advantages of the present invention are described in detail the embodiment part subsequently.
Brief description of the drawings
Accompanying drawing is to be used to provide a further understanding of the present invention, and forms a part for specification sheets, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is the cross section view of cored-wire of the present invention.
Description of reference numerals
1---sandwich layer 2---skin
Embodiment
Below the specific embodiment of the present invention is elaborated.Should be understood that, embodiment described herein only, for description and interpretation the present invention, is not limited to the present invention.
As shown in Figure 1, the invention provides a kind of cored-wire containing ferro-titanium and fluorite, this cored-wire comprises: the skin 2 of sandwich layer 1 and the described sandwich layer 1 of parcel, wherein, the mixture of described sandwich layer 1 for containing ferro-vanadium, nitrogenize silicomanganese, ferro-titanium and fluorite.
According to cored-wire of the present invention, on the one hand by add nitrogenize silicomanganese in sandwich layer, can improve the nitrogen content of unit sandwich layer, be beneficial to produce nitrogen content higher containing vanadium weathering steel, for example produce containing vanadium 0.06 % by weight, more than nitrogenous 0.010 % by weight weather resisting steel, can avoid the excessive phenomenon that adds noble metal vanadium to occur, reduce production cost.On the other hand, nitrogenize silicomanganese, ferro-titanium and fluorite add the use properties that does not affect cored-wire, and the rate of recovery of nitrogen is high and stable in preparation VN alloy molten steel, and further, on the basis of same content of vanadium, adopt cored-wire of the present invention to carry out the V-N Microalloy Steel yield strength that obtains after VN alloy molten steel casting that molten steel VN alloy obtains high, corrosion rate can remain unchanged relatively.
According to cored-wire of the present invention, in preferred described mixture, the content of ferro-vanadium is 65-80 % by weight, and the content of nitrogenize silicomanganese is 10-15 % by weight, and the content of ferro-titanium is 1-10 % by weight, the content 5-15 % by weight of fluorite.Adopt aforementioned cored-wire to carry out molten steel VN alloy, can produce nitrogen content higher containing vanadium weathering steel, and the yield strength of the steel obtaining after the VN alloy molten steel casting obtaining is high.
According to cored-wire of the present invention, in preferred described ferro-vanadium, V content is 38-82 % by weight, and all the other are Fe and inevitable other impurity element.(V content is 38.0-45.0 % by weight to the ferro-vanadium that aforementioned ferro-vanadium can be FeV40A for the trade mark, all the other are Fe and inevitable other impurity element), (V content is 48.0-55.0 % by weight to the ferro-vanadium of FeV50A, all the other are Fe and inevitable other impurity element), (V content is 58.0-65.0 % by weight to the ferro-vanadium of FeV60A, all the other are Fe and inevitable other impurity element), the ferro-vanadium (V content is 78.0-82.0 % by weight, and all the other are Fe and inevitable other impurity element) of FeV80A.
According to cored-wire of the present invention, described nitrogenize silicomanganese is FeSiMnN, follows the ferrosilicon of minute quantity free iron, not nitrogenize, the ferro-silico-manganese of not nitrogenize and the mixture that inevitably some other impurity element forms, and wherein the main component of FeSiMnN is Si
3n
4and Mn
5n
2.For the present invention, in preferred described nitrogenize silicomanganese, N content is 25.0-33.0 % by weight, and Si content is 38.0-45.0 % by weight, and Mn content is 10.0-15.0 % by weight, and all the other are a small amount of Fe and inevitable other impurity element.
According to cored-wire of the present invention, in preferred described ferro-titanium, Ti content is 25.0-45.0 % by weight, all the other are Fe and inevitable other impurity element, aforementioned ferro-titanium can be for example that (Ti content is 25.0-35.0 % by weight to FeTi30 for the trade mark, all the other are Fe and inevitable other impurity element), the trade mark is the ferro-titanium of FeTi40 (Ti content is 35.0-45.0 % by weight, and all the other be Fe and inevitable other impurity element).
According to cored-wire of the present invention, CaF in preferred described fluorite
2content>=93 % by weight, all the other are inevitable other impurity element.
According to cored-wire of the present invention, described sandwich layer for the ease of the mixture that contains ferro-vanadium, nitrogenize silicomanganese, ferro-titanium and fluorite fuses in molten steel fast, also be convenient to the making of the sandwich layer of cored-wire, simultaneously in order to improve the V-N Microalloy Steel yield strength of (also claiming containing vanadium weathering steel), the mixture that contains ferro-vanadium, nitrogenize silicomanganese, ferro-titanium and fluorite is preferably powder form, more preferably the grain diameter of described powder, below 5mm, is preferably below 2mm, below 3mm and 2-5mm.
According to cored-wire of the present invention, the described skin of preferred described cored-wire is iron sheet or sheetmetal.
The present invention is to the material of described iron sheet or sheetmetal without particular requirement, and it can be the routine selection of this area, and the present invention is not described in detail at this.
The cored-wire with aforementioned component of the present invention all can be realized object of the present invention, and its preparation method can be that the routine of this area is selected, for example, can carry out as follows:
Ferro-vanadium, nitrogenize silicomanganese, ferro-titanium and fluorite are ground to form to powder, then use crust (thereby forming skin of the present invention) for example can be wrapped to form cored-wire for iron sheet or sheetmetal.
In the present invention, the diameter of cored-wire can be that the routine of this area is selected, and for the present invention, preferably the external diameter of cored-wire is 10-20mm.
The invention provides a kind of cored-wire of the present invention in the application of preparing in molten steel.
The preparation method who the invention provides a kind of molten steel, the method comprises: cored-wire of the present invention is fed in the molten steel for the treatment of VN alloy and carries out VN alloy.
According to the preparation method of molten steel of the present invention, feed fast in molten steel in order to be conducive to cored-wire, simultaneously in order to improve the yield strength of V-N Microalloy Steel, preferably carrying out in VN alloy process, under dynamic condition, carry out VN alloy, dynamic condition can be by rocking ladle or rotating and realize, for example can be in cored-wire feeds the molten steel in ladle by Yarn feeding device in, ladle is rocked.
According to the preparation method of molten steel of the present invention, wherein, carrying out in VN alloy process, preferably in cored-wire is fed to the molten steel in ladle by Yarn feeding device in, to the contact area winding-up rare gas element of cored-wire and molten steel.
In the present invention, rare gas element can be that the routine of this area is selected, for example, can be nitrogen and/or argon gas.
According to the preparation method of molten steel of the present invention, by to cored-wire and molten steel contact area winding-up rare gas element, can improve on the one hand the mobility of the slag in this region, can prevent that on the other hand the slag beyond this region from collecting towards this zone flows, can improve the yield strength of V-N Microalloy Steel simultaneously, especially ladle is rocked in process, the slag in other region is likely towards cored-wire Flow Structure Nearby, by near the rare gas element of jetting cored-wire, can effectively ensure the quick feeding of cored-wire.
According to the preparation method of molten steel of the present invention, wherein, preferably the speed of cored-wire feeding is 2-10 meter per second.
According to the preparation method of molten steel of the present invention, treat that the molten steel of VN alloy is the molten steel that has passed through carbon, silicon, alloying of manganese described in preferably, more preferably pass through the molten steel of carbon, silicon, manganese, chromium, copper and mickel alloying.
According to one of the present invention preferred embodiment, treat that the temperature of the molten steel of VN alloy is 1560-1600 DEG C described in preferably.
The invention provides the molten steel obtaining according to the preparation method of molten steel of the present invention.
The invention provides a kind of vanadium weathering steel that contains, wherein, should be formed by molten steel casting of the present invention containing vanadium weathering steel.
Below in conjunction with embodiment, the present invention is further described, but can not therefore limit the scope of the invention.
In the present invention, nitrogen content records as follows: molten steel is directly got
above pole sample, the cooling post-treatment of sample to be tested becomes
oxygen nitrogen instrument roundlet rod standard, on oxygen nitrogen instrument, measure nitrogen content, the concrete measuring method of nitrogen is pressed the requirement of GB/T20124 (iron and steel, the mensuration of nitrogen content, rare gas element melting heat inducing defecation by enema and suppository) and is carried out.
Content of vanadium records as follows: molten steel is directly got
the cake sample of left and right, after sample to be tested is cooling at any one plane emery wheel scale removal, and polish flat, on spark discharge Atomic Emission SpectrometerAES, test by the requirement of GB/T4336 (carbon steel and middle-low alloy steel spark source atomic emission spectrometry analytical procedure).
The content of all the other elements can also adopt the method for prior art to measure, the present invention to this without particular requirement.
In the present invention, tensile property carries out according to GB/T228 (metallic substance tensile testing at ambient temperature), detects yield strength ReL.
In the present invention, the measuring method of the relative corrosion rate of steel is: the rectangle that steel is processed into 60mm × 40mm × 4mm, requiring the surfaceness of largest face is 3.2 μ m, then measures according to the method for regulation in TB/T2375-1993 " weathering steel period soaking corrosion corrosion test method for railway ".Specifically condition determination is, test temperature: 45 ± 1 DEG C; Relative humidity: 70% ± 5 DEG C; Testing liquid: 10-2mol/L NaHSO3; Test period: 72h, infiltrates the every 60min of 12min/; Test plate (panel) hot face temperature: 70 DEG C; Mensuration compared steel is Q345.
In the present invention, the powder of target particles particle diameter can will be sieved and be obtained by standard sieve after crushing material.
Embodiment 1
A kind of cored-wire A1 (external diameter is 13mm), comprise the skin of sandwich layer and parcel sandwich layer, described sandwich layer is by ferro-vanadium, nitrogenize silicomanganese, powder (grain diameter is that 2mm the is following) composition of ferro-titanium and fluorite, the outer crust of making for cold rolled strip (trade mark St12), wherein, in powder, contain ferro-vanadium (FeV50A, V content is 50.0 % by weight, all the other are Fe and inevitable other impurity element): 80 % by weight, (N content is 28 % by weight to nitrogenize silicomanganese, Si content is 40 % by weight, Mn content is 10 % by weight, all the other are a small amount of Fe and inevitable other impurity element): 10 % by weight, ferro-titanium (FeTi40, Ti content is 40 % by weight, all the other are Fe and inevitable other impurity element): 5 % by weight, fluorite (CaF
2content is 95 % by weight): 5 % by weight.
Embodiment 2
A kind of cored-wire A2 (external diameter is 13mm), comprise the skin of sandwich layer and parcel sandwich layer, described sandwich layer is by ferro-vanadium, nitrogenize silicomanganese, powder (grain diameter is that 2mm the is following) composition of ferro-titanium and fluorite, the outer crust of making for cold rolled strip (trade mark St12), wherein, in powder, contain ferro-vanadium (FeV50A, V content is 50.0 % by weight, all the other are Fe and inevitable other impurity element): 65 % by weight, (N content is 28 % by weight to nitrogenize silicomanganese, Si content is 40 % by weight, Mn content is 10 % by weight, all the other are a small amount of Fe and inevitable other impurity element): 15 % by weight, ferro-titanium (FeTi40, Ti content is 40 % by weight, all the other are Fe and inevitable other impurity element): 10 % by weight, fluorite (CaF
2content is 95 % by weight): 10 % by weight.
Embodiment 3
A kind of cored-wire A3 (external diameter is 12mm), comprise the skin of sandwich layer and parcel sandwich layer, described sandwich layer is by ferro-vanadium, nitrogenize silicomanganese, powder (grain diameter is that 2mm the is following) composition of ferro-titanium and fluorite, the outer crust of making for cold rolled strip (trade mark St12), wherein, in powder, contain ferro-vanadium (FeV50A, V content is 50.0 % by weight, all the other are Fe and inevitable other impurity element): 74 % by weight, (N content is 28 % by weight to nitrogenize silicomanganese, Si content is 40 % by weight, Mn content is 10 % by weight, all the other are a small amount of Fe and inevitable other impurity element): 10 % by weight, ferro-titanium (FeTi40, Ti content is 40 % by weight, all the other are Fe and inevitable other impurity element): 1 % by weight, fluorite (CaF
2content is 95 % by weight): 15 % by weight.
Embodiment 4
A kind of cored-wire A4 (external diameter is 12mm), comprise the skin of sandwich layer and parcel sandwich layer, described sandwich layer is by ferro-vanadium, nitrogenize silicomanganese, powder (grain diameter is that 2mm the is following) composition of ferro-titanium and fluorite, the outer crust of making for cold rolled strip (trade mark St12), wherein, in powder, contain ferro-vanadium (FeV50A, V content is 50.0 % by weight, all the other are Fe and inevitable other impurity element): 73 % by weight, (N content is 28 % by weight to nitrogenize silicomanganese, Si content is 40 % by weight, Mn content is 10 % by weight, all the other are a small amount of Fe and inevitable other impurity element): 12 % by weight, ferro-titanium (FeTi40, Ti content is 40 % by weight, all the other are Fe and inevitable other impurity element): 10 % by weight, fluorite (CaF
2content is 95 % by weight): 5 % by weight.
Comparative example 1
Identical with the cored-wire of embodiment 2, different, the sandwich layer of cored-wire D1 is the FeV50A ferro-vanadium powder of 100 % by weight.
Preparation example
Ton LF stove refining furnace+6 machine 6 flows and on billet caster, produces C content 0.08-0.12 % by weight 120 tons of converter+120 to adopt cored-wire A1-A4, Si content 0.15-0.35 % by weight, Mn content 1.15-1.40 % by weight, Cr content 0.20-0.60 % by weight, Ni content 0.15-0.35 % by weight, Cu content 0.20-0.60 % by weight, content of vanadium 0.09-0.15 % by weight, acid-soluble aluminium (Als) 0.01-0.04 % by weight, nitrogen content is not less than the YQ450NQR1 high-strength weathering steel of 0.0100 % by weight, specifically carries out as follows:
First in converter, add 140 tons of molten iron, utilize the function of the de-C of Converter Oxigen Blowing, molten iron is just smelt to molten steel, and the C in molten steel taps in ladle when just refining is to 0.03 % by weight, and now actual tap is 133 tons (in the first refining process of converter, the raw material of approximately 5 % by weight is burnt).In tapping process, in molten steel, add FeSi, FeMn and FeCr, and nickel plate, copper coin and aluminium cake (or with feeding wire machine feed aluminum steel) carry out Si, Mn, Cr, Ni, Cu and Al are element alloyed, after alloying, in molten steel, Si content is 0.27 % by weight, Cr content is 0.30 % by weight, Ni content is 0.20 % by weight, Cu content is 0.30 % by weight, Als content is 0.25 % by weight, C content is that 0.10 % by weight is (owing to containing certain carbon in FeMn, after adding FeMn, carbon content increases to some extent), now in molten steel, sample, the sample taking out is reprocessed into after cooling
oxygen nitrogen instrument roundlet rod standard, the nitrogen content of measuring on oxygen nitrogen instrument in molten steel is 0.0050 % by weight.
Molten steel starts electrically heated after arriving LF stove, in the time that being heated to 1580 DEG C, liquid steel temperature stops heating, feed cored-wire by feeding wire machine and also rock ladle simultaneously, contact area winding-up rare gas element (rare gas element is nitrogen) to cored-wire and molten steel simultaneously, to prepare the weather-proof molten steel of VN alloyization of required vanadium nitrogen content; Then flow on billet caster weather-proof VN alloyization molten steel is cast into 360mm × 450mm strand at 6 machines 6, after rolling, become a useful person for thickness 14mm, profile be " second " font containing the weather-proof microalloy shaped steel of vanadium, its nitrogen content and content of vanadium, the relative corrosion rate that embodies weather resistance, yield strength is in table 1.
Preparation comparative example
Method according to preparation example is prepared Finished Steel, different, uses cored-wire D1 to be prepared.
Table 1
In table 1, be all at C content, Mn content, under Si content, Cr content, the Ni content condition identical with Cu content, the contrast situation of the performance data of each Finished Steel and V and N content.
Data by table 1 can find out, cored-wire of the present invention is for realizing the alloying of molten steel vanadium and nitrogen, can in the situation that molten steel needs, produce nitrogen content higher containing vanadium weathering steel.And it is high to adopt cored-wire of the present invention to carry out the yield strength of the vanadium nitrogen microalloy weathering steel obtaining after the weather-proof molten steel casting of VN alloyization that molten steel VN alloy obtains, for example contrast preparation comparative example 1 is known with the result of preparation example 2 and preparation example 4, for obtaining the suitable Finished Steel of fundamental property (comprising yield strength and relative corrosion rate), adopt the required content of vanadium of steel that cored-wire alloying of the present invention obtains greatly to reduce, this greatly reduces production cost undoubtedly; And for example contrast preparation comparative example 1 is known with the result of preparation example 1 and preparation example 3, adopt the steel that cored-wire alloying of the present invention obtains not increasing under the prerequisite of content of vanadium, can increase nitrogen content, and the Finished Steel yield strength obtaining is higher, and corrosion rate can remain unchanged relatively.
More than describe the preferred embodiment of the present invention in detail; but the present invention is not limited to the detail in above-mentioned embodiment, within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition each the concrete technical characterictic described in above-mentioned embodiment, in reconcilable situation, can combine by any suitable mode.
In addition, also can carry out arbitrary combination between various embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (13)
1. containing a cored-wire for ferro-titanium and fluorite, this cored-wire comprises: the skin of sandwich layer and the described sandwich layer of parcel, it is characterized in that, and described sandwich layer is the mixture that contains ferro-vanadium, nitrogenize silicomanganese, ferro-titanium and fluorite.
2. cored-wire according to claim 1, wherein, in described mixture, the content of ferro-vanadium is 65-80 % by weight, and the content of nitrogenize silicomanganese is 10-15 % by weight, and the content of ferro-titanium is 1-10 % by weight, the content 5-15 % by weight of fluorite.
3. cored-wire according to claim 1 and 2, wherein, in described ferro-vanadium, V content is 38-82 % by weight, all the other are Fe and inevitable other impurity element.
4. cored-wire according to claim 1 and 2, wherein, in described nitrogenize silicomanganese, N content is 25-33 % by weight, and Si content is 38-45 % by weight, and Mn content is 10-15 % by weight, and all the other are a small amount of Fe and inevitable other impurity element.
5. cored-wire according to claim 1 and 2, wherein, in described ferro-titanium, Ti content is 25-45 % by weight, all the other are Fe and inevitable other impurity element.
6. cored-wire according to claim 1 and 2, wherein, CaF in described fluorite
2content>=93 % by weight, all the other are inevitable other impurity element.
7. cored-wire according to claim 1 and 2, wherein, described mixture is powder form, and the grain diameter of described powder is below 5mm, and the described skin of cored-wire is iron sheet or sheetmetal.
8. the application of the cored-wire described in any one in preparation VN alloy molten steel in claim 1-7.
9. a preparation method for molten steel, the method comprises: the cored-wire described in any one in claim 1-7 is fed in the molten steel for the treatment of VN alloy and carries out VN alloy.
10. preparation method according to claim 9, wherein, described in treat VN alloy molten steel be the molten steel of carbon silicomanganese, and described in treat that the temperature of the molten steel of VN alloy is 1560-1600 DEG C.
11. according to the preparation method described in claim 9 or 10, wherein, carries out VN alloy under dynamic condition, and when cored-wire feeds in the molten steel for the treatment of VN alloy, to the contact area winding-up rare gas element of cored-wire and described molten steel.
The molten steel that method in 12. claim 9-11 described in any one obtains.
13. 1 kinds contain vanadium weathering steel, it is characterized in that, should be formed by the molten steel casting described in claim 12 containing vanadium weathering steel.
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| CN102828000A (en) * | 2012-10-08 | 2012-12-19 | 侯巍 | Metallurgical V-N microalloying and compound deoxidation cored wire |
| CN104032084A (en) * | 2014-06-13 | 2014-09-10 | 四川攀研技术有限公司 | Microalloyed weathering steel, cored wire containing iron alloys and fluorite, application of cored wire, molten steel and preparation method of molten steel |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104032084A (en) * | 2014-06-13 | 2014-09-10 | 四川攀研技术有限公司 | Microalloyed weathering steel, cored wire containing iron alloys and fluorite, application of cored wire, molten steel and preparation method of molten steel |
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