CN104046886B - Core-spun yarn and application thereof and VN alloy molten steel and preparation method thereof and a kind of V-N Microalloy Steel - Google Patents
Core-spun yarn and application thereof and VN alloy molten steel and preparation method thereof and a kind of V-N Microalloy Steel Download PDFInfo
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Abstract
The invention provides a kind of core-spun yarn and application thereof, this core-spun yarn comprises: the skin of sandwich layer and the described sandwich layer of parcel, wherein, described sandwich layer is the mixture that contains VN alloy, ferro-silicon nitride, ferro-titanium and iron calcium alloy. The invention provides a kind of VN alloy molten steel and preparation method thereof, the method comprises: core-spun yarn of the present invention is fed in the molten steel for the treatment of VN alloy and carries out VN alloy. The invention provides a kind of V-N Microalloy Steel, this V-N Microalloy Steel is formed by VN alloy molten steel casting of the present invention. Core-spun yarn 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 steel, and the rate of recovery of nitrogen is high and stable.
Description
Technical field
The present invention relates to a kind of core-spun yarn and the application in molten steel VN alloy thereof, and a kind of VN alloy steelWater and preparation method thereof, and a kind of V-N Microalloy Steel.
Background technology
VN alloy is a kind of novel alloy additive, can substitute the production of vanadium iron for micro alloyed steel. Vanadium nitrogen closesGold makes an addition to the comprehensive mechanical performances such as intensity, toughness, ductility and the thermal fatigue resistance that can improve steel in steel, and it is good that steel is hadGood solderability. Reaching under same intensity, adding vanadium nitride and save vanadium addition 30-40%, and then reduced cost. Vanadium nitrogenAlloy can be used for structural steel, tool steel, and pipe line steel, in reinforcing bar and cast iron. VN alloy is applied to can in AldecorCarry out effective vanadium, nitrogen microalloying simultaneously, promote separating out of carbon in steel, vanadium, nitrogen compound, more effective performance sedimentation strengtheningAnd Grain refinement.
Owing to directly adding the rate of recovery in molten steel lower with block-shape morphology VN alloy, therefore main in prior artThat method by feed core-spun yarn in molten steel realizes molten steel vanadium, nitrogen alloying. The method is that block or spherical vanadium nitrogen are closedGold use physical method fragmentation, then packs into core-spun yarn, sandwich layer, iron sheet or the steel of VN alloy formation core-spun yarn with iron sheet or sheetmetalSkin forms the skin of core-spun yarn; Then above-mentioned core-spun yarn is fed in the molten steel in ladle by Yarn feeding device, make molten steel vanadium, nitrogenAlloying. This kind of method vanadium, the nitrogen alloying element rate of recovery are higher, and vanadium recovery is at 88-95%, and nitrogen recovery is at 70-90%. But shouldKind method is applied in the higher kind of some nitrogen content requirements and has some limitations, because this kind of core-spun yarn made of vanadium nitrideNitrogen content is limited by the ratio of nitrogen in vanadium-nitrogen alloy and vanadium, and in existing product, VN alloy has VN12, VN14 and VN16 tri-conventionallyThe individual trade mark, the generally ratio of these three trade mark nitrogen and vanadium 12:78 (N:V) respectively; 14:78 (N:V); 16:78 (N:V).Can find out that the ratio of nitrogen and vanadium is up to the 16:78 of VN16, in alloy, contain 16% N, contain 78% vanadium.
Therefore, if produce nitrogen content higher containing vanadium steel, must a large amount of vanadium nitride of corresponding feeding, followingBe that content of vanadium in steel also rolls up. And vanadium is more valuable metallic element, for the low one-tenth of production reducing containing vanadium steelOriginally be unnecessary.
Summary of the invention
The technical problem to be solved in the present invention is to provide one and can be used in that to produce nitrogen content higher, and the rate of recovery of nitrogen is highAnd the stable core-spun yarn containing vanadium steel.
For realizing aforementioned object, according to a first aspect of the invention, the invention provides a kind of core-spun yarn, this core-spun yarn bagDraw together: the skin of sandwich layer and the described sandwich layer of parcel, wherein, described sandwich layer is for containing VN alloy, ferro-silicon nitride, ferro-titanium and ironThe mixture of calcium alloy.
According to a second aspect of the invention, the invention provides core-spun yarn of the present invention preparing in VN alloy molten steelApplication.
According to a third aspect of the invention we, the invention provides a kind of preparation method of VN alloy molten steel, the methodComprise: core-spun yarn 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 according to the preparation method of VN alloy molten steel of the present inventionThe VN alloy molten steel preparing.
According to a fifth aspect of the invention, the invention provides a kind of V-N Microalloy Steel, wherein, this V-N Microalloy SteelFormed by VN alloy molten steel casting of the present invention.
Core-spun yarn of the present invention is for realizing the alloying of molten steel vanadium and nitrogen, can effectively increase nitrogen content according to needs andDo not affect content of vanadium, can in the situation that molten steel needs, produce nitrogen content higher containing vanadium steel, and the rate of recovery of nitrogen is high and steadyFixed. And adopt core-spun yarn of the present invention to carry out the vanadium nitrogen obtaining after VN alloy molten steel casting that molten steel VN alloy obtainsMicro alloyed steel yield strength and tensile strength are high.
Other features and advantages of the present invention are described in detail the detailed description of the invention 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 description, with tool belowBody embodiment one is used from explanation the present invention, but is not construed as limiting the invention. In the accompanying drawings:
Fig. 1 is the cross section view of core-spun yarn of the present invention.
Description of reference numerals
1 sandwich layer 2 skins
Detailed description of the invention
Below the specific embodiment of the present invention is elaborated. Should be understood that, described herein concreteEmbodiment 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 core-spun yarn, this core-spun yarn comprises: sandwich layer 1 and the described sandwich layer 1 of parcelSkin 2, wherein, the mixture of described sandwich layer 1 for containing VN alloy, ferro-silicon nitride, ferro-titanium and iron calcium alloy.
According to core-spun yarn of the present invention, on the one hand by add ferro-silicon nitride in sandwich layer, can improve the nitrogen of unit sandwich layerContent, be beneficial to produce nitrogen content higher containing vanadium steel, for example produce containing vanadium 0.05 % by weight, more than nitrogenous 0.015 % by weight non-Quenched and tempered steel, thus can avoid the excessive phenomenon that adds precious metal vanadium to occur, reduce production cost. On the other hand, silicon nitrideIron add the serviceability that does not affect core-spun yarn, and high and stable in the rate of recovery of preparing nitrogen in VN alloy molten steel, andFurther, because described sandwich layer of the present invention is the mixing that contains VN alloy, ferro-silicon nitride, ferro-titanium and iron calcium alloyThing, makes to adopt core-spun yarn of the present invention to carry out the vanadium obtaining after VN alloy molten steel casting that molten steel VN alloy obtainsNitrogen micro alloyed steel yield strength and tensile strength are high.
According to core-spun yarn of the present invention, in preferred described mixture, the content of VN alloy is 50-94 % by weight, silicon nitrideThe content of iron is 4-15 % by weight, and the content of ferro-titanium is 1-25 % by weight, and the content of iron calcium alloy is 1-25 % by weight. AdoptAforementioned core-spun yarn carries out molten steel VN alloy, and nitrogen recovery is high and stable, and after the VN alloy molten steel casting obtainingThe V-N Microalloy Steel yield strength and the tensile strength that obtain are high.
According to core-spun yarn of the present invention, in preferred described VN alloy, N content is 10-18 % by weight, and V content is that 76-82 is heavyAmount %, all the other are Fe and inevitable other impurity element. Aforementioned VN alloy can be for example that VN12(V content is for the trade mark76.0-82.0 % by weight, N content is 10.0-14.0 % by weight, all the other are Fe and inevitable other impurity element), VN14(VContent is 76.0-82.0 % by weight, and N content is 12.0-16.0 % by weight, and all the other are Fe and inevitable other impurity element),(V content is 76.0-82.0 % by weight to the VN alloy of VN16, and N content is 14.0-18.0 % by weight, and all the other are Fe and inevitableOther impurity element). Adopt aforementioned core-spun yarn to carry out molten steel VN alloy, nitrogen recovery is high and stable, and obtainThe V-N Microalloy Steel yield strength and the tensile strength that after VN alloy molten steel casting, obtain are high.
According to core-spun yarn of the present invention, the main component of described ferro-silicon nitride is Si3N4, follow minute quantity free iron, nitrogen notThe ferrosilicon of changing and the inevitably mixture of some other impurity element composition. For the present invention, preferred described ferro-silicon nitrideMiddle N content is 32-39 % by weight, and Si content is 48-58 % by weight, and all the other are a small amount of Fe and inevitable other impurity unitElement. Adopt aforementioned core-spun yarn to carry out molten steel VN alloy, nitrogen recovery is high and stable, and the VN alloy molten steel obtainingThe V-N Microalloy Steel yield strength height and the tensile strength that after casting, obtain are high.
According to core-spun yarn of the present invention, in preferred described ferro-titanium, Ti content is 25-45 % by weight, and all the other are Fe and notEvitable other impurity element, aforementioned ferro-titanium can be for example that FeTi30(Ti content is that 25.0-35.0 is heavy for the trade markAmount %, all the other are Fe and inevitable other impurity element), the trade mark is that FeTi40(Ti content is 35.0-45.0 % by weight, itsRemaining be Fe and inevitable other impurity element) ferro-titanium. Adopt aforementioned core-spun yarn to carry out molten steel VN alloy, nitrogenThe rate of recovery is high and stable, and the V-N Microalloy Steel yield strength and the tension that after the VN alloy molten steel casting obtaining, obtainIntensity is high.
According to core-spun yarn of the present invention, in preferred described iron calcium alloy, Ca content is 28-35 % by weight, and all the other are Fe and notEvitable other impurity element.
According to core-spun yarn of the present invention, for the ease of VN alloy, ferro-silicon nitride, iron calcium alloy and the fast fast thawing of ferro-titaniumEnter in molten steel, be also convenient to the making of the sandwich layer of core-spun yarn, simultaneously strong in order to improve yield strength and the tension of V-N Microalloy SteelDegree, the mixture that contains VN alloy, ferro-silicon nitride and ferro-titanium described in is preferably powder form, more preferably described powderGrain diameter below 5mm, for example, can be, below 2mm, below 3mm, to be preferably 2-5mm.
According to core-spun yarn of the present invention, the described skin of preferred described core-spun yarn is iron sheet or sheetmetal.
The present invention is to the material of described iron sheet or sheetmetal without particular/special requirement, and it can be the routine selection of this area, thisBrightly be not described in detail at this.
The core-spun yarn with aforementioned component of the present invention all can be realized object of the present invention, and its preparation method can be this areaRoutine select, for example can carry out as follows:
VN alloy, ferro-silicon nitride, ferro-titanium and iron calcium alloy are ground to form to powder, then use crust (thereby shapeBecome skin of the present invention) for example can be wrapped to form core-spun yarn for iron sheet or sheetmetal.
In the present invention, the diameter of core-spun yarn can be that the routine of this area is selected, for the present invention, outside preferred core-spun yarnFootpath is 10-20mm.
The invention provides a kind of core-spun yarn of the present invention in the application of preparing in VN alloy molten steel.
The preparation method who the invention provides a kind of VN alloy molten steel, the method comprises: by bag of the present inventionHeart yearn feeds in the molten steel for the treatment of VN alloy and carries out VN alloy.
According to the preparation method of VN alloy molten steel of the present invention, feed fast in molten steel in order to be conducive to core-spun yarn,Simultaneously in order to improve yield strength and the tensile strength of V-N Microalloy Steel, preferably carrying out in VN alloy process, movingUnder state condition, carry out VN alloy, dynamic condition can be by rocking ladle or rotating and realize, for example can beWhen core-spun yarn feeds in the molten steel in ladle by Yarn feeding device, ladle is rocked.
According to the preparation method of VN alloy molten steel of the present invention, wherein, carrying out in VN alloy process, preferredIn in core-spun yarn is fed to the molten steel in ladle by Yarn feeding device, lazy to the contact area winding-up of core-spun yarn and molten steelProperty gas.
In the present invention, inert gas 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 VN alloy molten steel of the present invention, by lazy to core-spun yarn and the winding-up of molten steel contact areaProperty gas, can improve on the one hand the mobility of the slag in this region, can improve simultaneously V-N Microalloy Steel yield strength andTensile strength, can prevent that the slag beyond this region from flowing and collecting towards this region on the other hand, especially ladle is being rockedCheng Zhong, the slag in other region is likely towards core-spun yarn Flow Structure Nearby, by near the inert gas of jetting core-spun yarn, can be effectiveEnsure the quick feeding of core-spun yarn.
According to the preparation method of VN alloy molten steel of the present invention, wherein, preferably the speed of core-spun yarn feeding is 3-10Meter per second.
According to the preparation method of VN alloy molten steel of the present invention, the molten steel for the treatment of VN alloy described in is preferably forThe molten steel of carbon silicomangan.
According to one of the present invention preferred embodiment, treat that the temperature of the molten steel of VN alloy is described in preferably1500-1600℃。
The invention provides the VN alloy molten steel obtaining according to the preparation method of VN alloy molten steel of the present invention.
The invention provides a kind of V-N Microalloy Steel, wherein, this V-N Microalloy Steel is closed by vanadium nitrogen of the present inventionAurification molten steel casting forms.
Below in conjunction with detailed description of the invention, 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 the more than 10 pole sample of φ, and sample to be tested is coldBut be processed into afterwardsOxygen nitrogen instrument roundlet rod standard sample, on oxygen nitrogen instrument, measure nitrogen content, the concrete assay method of nitrogenPress GB/T20124(iron and steel, the mensuration of nitrogen content, inert gas melting heat inducing defecation by enema and suppository) requirement carry out.
Nitrogen recovery is by measuring the forward and backward nitrogen content of molten steel feeding core-spun yarn, then bring in conjunction with core-spun yarn totalNitrogen amount, by calculating, is specially: nitrogen recovery=and (before the nitrogen content-molten steel feeding core-spun yarn after molten steel feeding core-spun yarnNitrogen content) × tap/core-spun yarn nitrogen pool of bringing into.
Content of vanadium records as follows: molten steel is directly got the cake sample of φ 30 × 10mm left and right, and sample to be tested is coolingAfter at any one plane emery wheel scale removal, and polish flat, on spark discharge Atomic Emission Spectrometer AES, by GB/T4336(carbon steel and middle-low alloy steel spark source atomic emission spectrometry analytical method) requirement test.
In the present invention, tensile property is according to GB/T228(metal material tensile testing at ambient temperature) carry out, detect and bend respectivelyTake intensity ReL, tensile strength Rm.
In the present invention, the powder of target particles particle diameter can will be sieved and be obtained by standard screen after crushing material.
Embodiment 1
A kind of core-spun yarn A1(external diameter is 12mm), comprise the skin of sandwich layer and parcel sandwich layer, described sandwich layer by VN alloy,Powder (grain diameter is that 2mm the is following) composition of ferro-silicon nitride, ferro-titanium and iron calcium alloy, skin is the cold-strip steel (trade markSt12) crust of making, wherein, in powder, contains VN alloy (VN16, content of vanadium 78 % by weight, N content 16 % by weight): 94% by weight, ferro-silicon nitride (N content is 36 % by weight, and Si content is 52 % by weight): 4 % by weight, ferro-titanium: 1 % by weight, iron calcium closesGold (Ca content is 30 % by weight, and all the other are Fe and inevitable other impurity element): 1 % by weight, ferro-titanium is FeTi40(Ti content is 40 % by weight, and all the other are Fe and inevitable other impurity element).
Embodiment 2
A kind of core-spun yarn A2(external diameter is 12mm), comprise the skin of sandwich layer and parcel sandwich layer, described sandwich layer by VN alloy,Powder (grain diameter is that 3mm the is following) composition of ferro-silicon nitride, ferro-titanium and iron calcium alloy, skin is the cold-strip steel (trade markSt12) crust of making, wherein, in powder, contains VN alloy (VN16, content of vanadium 78 % by weight, N content 16 % by weight): 51% by weight, ferro-silicon nitride (N content is 36 % by weight, and Si content is 52 % by weight): 9 % by weight, ferro-titanium: 25 % by weight, iron calcium closesGold (Ca content is 30 % by weight, and all the other are Fe and inevitable other impurity element): 15 % by weight, ferro-titanium is FeTi40(Ti content is 40 % by weight, and all the other are Fe and inevitable other impurity element).
Embodiment 3
A kind of core-spun yarn A3(external diameter is 13mm), comprise the skin of sandwich layer and parcel sandwich layer, described sandwich layer by VN alloy,Powder (grain diameter is that 3mm the is following) composition of ferro-silicon nitride, ferro-titanium and iron calcium alloy, skin is the cold-strip steel (trade markSt12) crust of making, wherein, in powder, contains VN alloy (VN16, content of vanadium 78 % by weight, N content 16 % by weight): 51% by weight, ferro-silicon nitride (N content is 36 % by weight, and Si content is 52 % by weight): 9 % by weight, ferro-titanium: 15 % by weight, iron calcium closesGold (Ca content is 30 % by weight, and all the other are Fe and inevitable other impurity element): 25 % by weight, ferro-titanium is FeTi40(Ti content is 40 % by weight, and all the other are Fe and inevitable other impurity element).
Embodiment 4
A kind of core-spun yarn A4(external diameter is 13mm), comprise the skin of sandwich layer and parcel sandwich layer, described sandwich layer by VN alloy,Powder (grain diameter is that 5mm the is following) composition of ferro-silicon nitride, ferro-titanium and iron calcium alloy, skin is the cold-strip steel (trade markSt12) crust of making, wherein, in powder, contains VN alloy (VN16, content of vanadium 78 % by weight, N content 16 % by weight): 75% by weight, ferro-silicon nitride (N content is 36 % by weight, and Si content is 52 % by weight): 15 % by weight, ferro-titanium: 1 % by weight, iron calcium closesGold (Ca content is 30 % by weight, and all the other are Fe and inevitable other impurity element): 9 % by weight, ferro-titanium is FeTi40(Ti content is 40 % by weight, and all the other are Fe and inevitable other impurity element).
Comparative example 1
Identical with the core-spun yarn of embodiment 4, different, the sandwich layer of core-spun yarn D1 is that the VN16 vanadium nitride of 100 % by weight closesBronze material.
Preparation example
Ton LF stove refining furnace+6 machine 6 flows and on billet caster, produces C and contain 120 tons of converter+120 to adopt core-spun yarn A1-A4Amount 0.34-0.38 % by weight, Mn content 1.45-1.70 % by weight, Si content 0.25-0.45 % by weight, content of vanadium 0.05-0.08 is heavyAmount %, nitrogen content is not less than the 36Mn of 0.0050 % by weight2VN steel, 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, molten steelIn C when just refining is to 0.08 % by weight, tap in ladle, now actual tap is 133 tons of (approximately 5 weights in the first refining process of converterThe raw material of amount % is burnt). In tapping process, in molten steel, add FeSi, FeMn alloy and anthracite to carry out Si, Mn and C elementAlloying, after alloying, in molten steel, C content is 0.35 % by weight, and Mn content is 1.50 % by weight, and Si content is 0.30 % by weight, and V containsAmount is 0.005 % by weight, now in molten steel, samples, and after the sample of taking-up is cooling, is reprocessed intoOxygen nitrogen instrument roundletRod standard sample, the nitrogen content of measuring on oxygen nitrogen instrument in molten steel is 0.0050 % by weight.
Molten steel starts electrical heating after arriving LF stove, stops heating in the time that liquid steel temperature is heated to 1575 DEG C, feeds by feeding wire machineEnter core-spun yarn and rock ladle simultaneously, to the contact area winding-up inert gas of core-spun yarn and molten steel, (inert gas is nitrogen simultaneouslyGas), to prepare the VN alloy molten steel of required vanadium nitrogen content, the nitrogen recovery (the results are shown in Table 1) of this process; Then at 6 machines 6Stream becomes 280mm × 380mm strand by VN alloy molten steel casting on billet caster, after rolling, become a useful person forWall thickness is the finished product seamless steel pipe of 5mm, its nitrogen content and content of vanadium, and yield strength and tensile strength are in table 1.
Preparation comparative example
Method according to preparation example is prepared finished steel, different, uses core-spun yarn D1 to be prepared.
Table 1
In table 1, be all at C content, Mn content, the performance data of each finished steel under the identical condition of Si content rightThe contrast of ratio and nitrogen recovery.
Data by table 1 can find out, core-spun yarn of the present invention, can foundation for realizing the alloying of molten steel vanadium and nitrogenNeed to effectively increase nitrogen content and not affect content of vanadium, can in the situation that molten steel needs, produce nitrogen content higher containing vanadium steel,And the rate of recovery of nitrogen is stable. And adopt core-spun yarn of the present invention to carry out the VN alloy molten steel that molten steel VN alloy obtainsThe V-N Microalloy Steel yield strength and the tensile strength that after casting, obtain are high, for example the knot of contrast preparation comparative example 2 and preparation example 4Fruit is known, for obtaining the suitable finished steel of key property, the required content of vanadium of steel that adopts core-spun yarn alloying of the present invention to obtainGreatly reduce, this greatly reduces production cost undoubtedly; And for example contrast preparation comparative example 1 is known with the result of preparation example 4, adoptsThe steel that core-spun yarn alloying of the present invention obtains is not increasing under the prerequisite of content of vanadium, can greatly increase nitrogen content, and obtainFinished steel yield strength and tensile strength higher.
More than describe the preferred embodiment of the present invention in detail, still, the present invention is not limited in above-mentioned embodimentDetail, within the scope of technical conceive of the present invention, can carry out multiple simple variant to technical scheme of the present invention, thisA little 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 detailed description of the invention, at lance notIn the situation of shield, can combine by any suitable mode.
In addition, between various embodiment of the present invention, also can be combined, as long as it is without prejudice to thisThe thought of invention, it should be considered as content disclosed in this invention equally.
Claims (9)
1. a core-spun yarn, this core-spun yarn comprises: the skin of sandwich layer and the described sandwich layer of parcel, it is characterized in that, described sandwich layer isThe mixture that contains VN alloy, ferro-silicon nitride, ferro-titanium and iron calcium alloy;
Wherein, in described mixture, the content of VN alloy is 50-94 % by weight, and the content of ferro-silicon nitride is 4-15 % by weight,The content of ferro-titanium is 1-25 % by weight, and the content of iron calcium alloy is 1-25 % by weight;
Wherein, in described ferro-silicon nitride, N content is 32-39 % by weight, and Si content is 48-58 % by weight, and all the other are a small amount of FeWith inevitable other impurity element;
Wherein, in described ferro-titanium, Ti content is 25-45 % by weight, and all the other are Fe and inevitable other impurity element;
Wherein, in iron calcium alloy, Ca content is 28-35 % by weight, and all the other are Fe and inevitable other impurity element.
2. core-spun yarn according to claim 1, wherein, in described VN alloy, N content is 10-18 % by weight, V content is76-82 % by weight, all the other are Fe and inevitable other impurity element.
3. core-spun yarn according to claim 1, wherein, described mixture is powder form, the grain diameter of powder is at 5mmBelow, the described skin of core-spun yarn is iron sheet or sheetmetal.
In claim 1-3 the core-spun yarn described in any one in the application of preparing in VN alloy molten steel.
5. a preparation method for VN alloy molten steel, the method comprises: by the bag described in any one in claim 1-3Heart yearn feeds in the molten steel for the treatment of VN alloy and carries out VN alloy.
6. preparation method according to claim 5, wherein, described in treat VN alloy molten steel be carbon silicomanganChange molten steel, and described in treat that the temperature of the molten steel of VN alloy is 1500-1600 DEG C.
7. according to the preparation method described in claim 5 or 6, wherein, under dynamic condition, carry out VN alloy, and in coredWhen line feeds in the molten steel for the treatment of VN alloy, to the contact area winding-up inert gas of core-spun yarn and described molten steel.
8. the VN alloy molten steel that in claim 5-7, the method described in any one obtains.
9. a V-N Microalloy Steel, is characterized in that, this V-N Microalloy Steel is by VN alloy steel claimed in claim 8Water casting forms.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102181603A (en) * | 2011-05-11 | 2011-09-14 | 攀钢集团有限公司 | Vanadium nitride core-spun yarn and method for realizing molten steel vanadium and nitrogen alloying |
| CN102212737A (en) * | 2011-05-11 | 2011-10-12 | 攀钢集团有限公司 | Core-spun thread and method for implementing molten steel vanadium-nitrogen alloying |
| CN102828000A (en) * | 2012-10-08 | 2012-12-19 | 侯巍 | Metallurgical V-N microalloying and compound deoxidation cored wire |
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| JP3155104B2 (en) * | 1992-12-28 | 2001-04-09 | 新日本製鐵株式会社 | Oxide control method for Ca-added steel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102181603A (en) * | 2011-05-11 | 2011-09-14 | 攀钢集团有限公司 | Vanadium nitride core-spun yarn and method for realizing molten steel vanadium and nitrogen alloying |
| CN102212737A (en) * | 2011-05-11 | 2011-10-12 | 攀钢集团有限公司 | Core-spun thread and method for implementing molten steel vanadium-nitrogen alloying |
| CN102828000A (en) * | 2012-10-08 | 2012-12-19 | 侯巍 | Metallurgical V-N microalloying and compound deoxidation cored wire |
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