CN103911482B - Titanium calcium silicon composite core-spun yarn and application thereof and Ti Alloying molten steel and preparation method thereof and a kind of titaniferous steel alloy - Google Patents
Titanium calcium silicon composite core-spun yarn and application thereof and Ti Alloying molten steel and preparation method thereof and a kind of titaniferous steel alloy Download PDFInfo
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Abstract
The invention provides a kind of titanium calcium silicon composite core-spun yarn, this cored-wire comprises: endothelium, crust, calcium silica flour and titanium-iron powder, and described interior intracutaneous wraps up described titanium-iron powder, fills described calcium silica flour between described endothelium and crust.The invention provides titanium calcium silicon composite core-spun yarn of the present invention and prepare the application in Ti Alloying molten steel.The invention provides a kind of preparation method of Ti Alloying molten steel, the method comprises: titanium calcium silicon composite core-spun yarn feeding of the present invention treated to carry out Ti Alloying in titanium alloyed molten steel.The invention provides the Ti Alloying molten steel that method of the present invention obtains.The invention provides a kind of titaniferous steel alloy, this titaniferous steel alloy is formed by Ti Alloying molten steel casting of the present invention.In a preferred embodiment of the invention, cored-wire of the present invention is used for realizing molten steel Ti Alloying, and the rate of recovery of titanium is high and stable, substantially maintains between 80%-85%, effectively improves steel quality.
Description
Technical field
The present invention relates to a kind of titanium calcium silicon composite core-spun yarn and the application in molten steel Ti Alloying thereof, and a kind of Ti Alloying molten steel and preparation method thereof, and a kind of titaniferous steel alloy.
Background technology
For ensureing various physics, the chemical property of steel, alloy addition need be added by the operation of its composition adjustment to specialized range in steel.The less element (C, Si, Mn, S or P) of do not have in ordinary steel or content all belongs to alloying element.Alloy addition both can be pure material (nickel, copper, aluminium, Graphite Powder 99 etc.), also can be iron alloy (ferromanganese, ferrosilicon, vanadium iron, ferrotianium etc.), may also be the compound (oxide compound, carbide, nitride etc.) of alloying element.
The avidity of the elements such as Ni, Mo, Cu, Co and oxygen is low, can add with furnace charge or add in smelting process; And Ti, V, Cr, Si, Mn, Al etc. are strong with the avidity of oxygen, be then that (or in ladle) is added in the molten steel of fully deoxidation before coming out of the stove.Can the large iron alloy of add-on in stove, its lumpiness comparatively great talent easily through slag blanket.Add fashionable in ladle, iron alloy and slag react few, and the rate of recovery is higher, the most handy through broken granular iron alloy.The ferromanganese that consumption is large, ferrosilicon, ferrochrome, nickel etc., add molten steel network minimal with bulk, usually can adopt simple Adding Way.
Titanium can improve the high temperature hardening capacity of steel, and the effect of formation carbide tendency, crystal grain thinning is large, can improve intensity, hardness and ductility, join in stainless steel and can improve erosion resistance.At present, STEELMAKING PRODUCTION all adopts ferro-titanium block to add after deoxidation of molten steel completes when Ti Alloying, yield of alloy is low.Therefore, the Ti Alloying cored-wire that exploitation is applicable to make steel has very important effect.
Chinese patent application 201010545935.X discloses a kind of bismuth cored-wire, this cored-wire is made up of steel-tape sheath and core powder, diameter is the cored-wire of Φ 8 ~ Φ 20 or other size diameter or other profile, the alloying constituent of core powder comprises Ca, Si, S, Fe, Bi, and wherein, the weight percent content of Ca is 0-20%, the weight percent content of Si is 0-15%, the weight percent content of the weight percent content of S to be the weight percent content of 0-10%, Fe be 0-20%, Bi is 50-100%.
Chinese patent application 200510019893.5 discloses aluminium-rare-earth core-spun yarn, and this cored-wire adopts the aluminium-rare-earth heart yearn improving intensity containing rare earth metal, is the rare earth metal of 0.001-3% containing mass percent.
Chinese patent application 201120149390.0 discloses cored-wire, and this cored-wire comprises the sandwich layer be made up of alloy of vanadium nitride and the exodermis being wrapped in outside, is enclosed with mesh-supported layer and fluorite layer from inside to outside successively between described sandwich layer and exodermis.
Chinese patent application 201120507605.1 discloses cored-wire, and this cored-wire comprises sandwich layer and is wrapped in the sheetmetal layer of described sandwich layer outside, and described sandwich layer is titanium silicon layer.In addition, mesh-supported layer and alloy of vanadium nitride layer is enclosed with from inside to outside successively between described titanium silicon layer and sheetmetal layer.By feeding wire machine, cored-wire is fed molten steel depths, effectively can improve the rate of recovery of titanium, can make the rate of recovery stability contorting of titanium more than 75%, also can carry out the alloying of vanadium simultaneously to molten steel.
Chinese patent application 201120090988.7 discloses cored-wire, comprise crust and core material, core material is closely filled in outer intracutaneous, crust comprises the metal level of outer field steel disc layer and internal layer, crust both sides are bark graft mouth fold inward outside, and extruding is fixing, and described metal level fusing point is less than steel, described metal layer thickness is 0.2mm, and described steel disc layer thickness is 0.2mm.
Chinese patent application 201220604949.9 discloses high magnesium cored-wire, heart yearn body is made up of round shape cored-wire shell and the pure magnesium grain be filled in this cored-wire shell and associated alloys powder, wherein, described cored-wire shell is by the soft steel roll coil of strip and form, its wire diameter is 12mm-12.5mm, and the thickness of described mild-carbon steel strip is 0.8-1mm.
Chinese patent application 201120163155.9 discloses cored wire of boron-iron alloy, and core is ferro-boron powder, and described jacket thickness is 0.2-0.8mm, and ferro-boron grain weight amount accounts for the 30%-60% of cored-wire gross weight.
Chinese patent application 200910273016.9 discloses micro-alloying compound cored wire for high-strength steel, inner core composition is: Ca23%-28%, Si51%-55%, Mg0.65%-1.5%, Ba1.3%-2.5%, Re0.6%-1.0%, B0.6%-1.2%, Zr1.6%-3.5%, Ti1.3%-2.8%, Nb0.6%-1.2% surplus is iron and inevitable impurity.
Chinese patent application 200610023557.2 discloses low-nitrogen ferrotitanium and manufacture method thereof and cored-wire, described low-nitrogen ferrotitanium is 70Fe-Ti alloy, containing impurity elements such as nitrogen, aluminium, silicon, carbon, phosphorus, sulphur, described nitrogen, aluminium content is respectively≤and 0.15% and <3%.Described titanium, iron, silicon, carbon, phosphorus, sulphur aluminium content are respectively: titanium 60-80%, silicon≤0.5%, carbon≤0.1%, phosphorus≤0.04%, and sulphur≤0.03%, and surplus is iron.
Chinese patent application 201120506301.3 discloses a kind of low-nitrogen ferrotitanium cored-wire, core material is be crushed to the low-nitrogen ferrotitanium powder being less than 2mm, directly extrusion machine is entered after low-nitrogen ferrotitanium line material is heated by diathermic furnace, continuously extruded one-tenth solid wire material, cored-wire is become by the direct winding of core cabling wire machine and steel band, guarantee low-nitrogen ferrotitanium line material and air short for duration of contact, such that line material is not oxidized, not efflorescence.
Chinese patent application 200810249804.X discloses composite core-spun yarn and the application thereof of a kind of ferro-boron and ferrotianium, the powder of composite core-spun yarn is ferro-boron and ferrotianium, the boron-containing quantity of described ferro-boron is not less than 9wt%, the titaniferous amount of ferrotianium is not less than 25wt%, and the blending ratio of ferro-boron and ferrotianium is determined as required.Adopt the composite core-spun yarn of ferro-boron and ferrotianium, ferrotianium and ferro-boron are fed in molten steel simultaneously, simplify the control of Boron contents in the alloying operation of smelting boron steel and stabilized steel.
As can be seen here, the core material of the cored-wire of prior art research is mainly the elements such as calcium, niobium, vanadium, boron, and very few to the research of the cored-wire containing titanium.
Summary of the invention
One is the object of the present invention is to provide to can be used in producing titaniferous steel alloy, and the titanium calcium silicon composite core-spun yarn that the rate of recovery of titanium is high and stable.
Molten steel alloying should accomplish low consumption, high-level efficiency, high quality.Therefore, the height of different additive total cost should be considered when most suitable alloy addition is selected, also will consider its purity or impurity content.Usually, in iron alloy, impurity content is higher at a low price, and most of impurity element all will increase the consumption of flux and scavenging agent, and quantity of slag increase, output reduction, energy consumption are strengthened.Therefore, when selecting alloy addition, also need to consider steelmaking process material balance and energy balance, consider the melting range of additive, and the dissolution rate of prior additive.Such as, though the fusing point of titanium is more than 1700 DEG C, titanium does not reach temperature of fusion to be just dissolvable in water in steel.The chemical composition of additive and structure, the thermal capacity at steel-making temperature and thermal conduction capability and additive add fashionable physical condition and lumpiness etc. and all have an impact to dissolution rate.Density, the feed postition of additive are also significant to stabilizing and increasing of the rate of recovery.
Amid all these factors analyze and consider, the applicant of the application gropes experiment and theory deduction discovery through long-term, when faced by need to use the cored-wire of titaniferous to carry out alloying time, add calcium silica flour and can improve cored-wire for the rate of recovery of titanium during alloying and stability.
For realizing aforementioned object, according to a first aspect of the invention, the invention provides a kind of titanium calcium silicon composite core-spun yarn, this cored-wire comprises: endothelium, crust, calcium silica flour and titanium-iron powder, described interior intracutaneous wraps up described titanium-iron powder, fills described calcium silica flour between described endothelium and crust.
According to a second aspect of the invention, the invention provides titanium calcium silicon composite core-spun yarn of the present invention and prepare the application in Ti Alloying molten steel.
According to a third aspect of the invention we, the invention provides a kind of preparation method of Ti Alloying molten steel, the method comprises: titanium calcium silicon composite core-spun yarn feeding of the present invention treated to carry out Ti Alloying in titanium alloyed molten steel.
According to a forth aspect of the invention, the invention provides the Ti Alloying molten steel that method of the present invention obtains.
According to a fifth aspect of the invention, the invention provides a kind of titaniferous steel alloy, wherein, this titaniferous steel alloy is formed by Ti Alloying molten steel casting of the present invention.
In a preferred embodiment of the invention, cored-wire of the present invention is used for realizing molten steel Ti Alloying, and the rate of recovery of titanium is high and stable, substantially maintains between 80%-85%, effectively improves steel quality.And the titanium alloy steel yield strength obtained after adopt cored-wire of the present invention to carry out Ti Alloying molten steel casting that molten steel Ti Alloying obtains and tensile strength high.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Embodiment
Below the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
The invention provides a kind of titanium calcium silicon composite core-spun yarn, wherein, this cored-wire comprises: endothelium, crust, calcium silica flour and titanium-iron powder, and described interior intracutaneous wraps up described titanium-iron powder, fills described calcium silica flour between described endothelium and crust.
Adopt aforementioned cored-wire to carry out molten steel Ti Alloying, titanium recovery rate is high and stable, and the titanium alloy steel yield strength obtained after the Ti Alloying molten steel casting obtained and tensile strength high.
According to cored-wire of the present invention, the weight ratio of preferred described titanium-iron powder and calcium silica flour is 5-8:1.Adopt aforementioned cored-wire to carry out molten steel Ti Alloying, titanium recovery rate is high and stable, and the titanium alloy steel yield strength obtained after the Ti Alloying molten steel casting obtained and tensile strength high.
According to cored-wire of the present invention, the Ti containing 40-85 % by weight in preferred described titanium-iron powder, the Ti preferably containing 50-70 % by weight, the S of the C of < 5 % by weight, < 0.05 % by weight, surplus is Fe.Adopt aforementioned cored-wire to carry out molten steel Ti Alloying, titanium recovery rate is high and stable, and the titanium alloy steel yield strength obtained after the Ti Alloying molten steel casting obtained and tensile strength high.
According to cored-wire of the present invention, Ca content in preferred calcium silica flour is 25-35 % by weight, Si content is 50-70 % by weight, C content is < 1.0 % by weight, S content < 0.05 % by weight, P content < 0.05 % by weight, Al content is 1-5 % by weight.Adopt aforementioned cored-wire to carry out molten steel Ti Alloying, titanium recovery rate is high and stable, and the titanium alloy steel yield strength obtained after the Ti Alloying molten steel casting obtained and tensile strength high.
According to cored-wire of the present invention, the granularity≤2mm of preferred calcium silica flour, the granularity≤1.5mm of titanium-iron powder.Adopt aforementioned cored-wire to carry out molten steel Ti Alloying, titanium recovery rate is high and stable, and the titanium alloy steel yield strength obtained after the Ti Alloying molten steel casting obtained and tensile strength high.
According to the preferred embodiment of the present invention, described titanium-iron powder is the titanium-iron powder (granularity≤1.5mm of trade mark FeTi70, containing the Ti of 67 % by weight, the C of < 0.5 % by weight, the S of < 0.05 % by weight, surplus is Fe), titanium-iron powder (granularity≤the 1.5mm of trade mark FeTi60, containing the Ti of 58 % by weight, the C of < 0.5 % by weight, the S of < 0.05 % by weight, surplus is Fe), titanium-iron powder (granularity≤the 1.5mm of trade mark FeTi55, containing the Ti of 55 % by weight, the C of < 0.4 % by weight, the S of < 0.05 % by weight, surplus is Fe).
According to one of the present invention preferred embodiment, described calcium silica flour is the calcium silica flour (granularity≤2mm of trade mark Ca31Si60, or≤1.3mm, or≤1.25mm, the Ca content in calcium silica flour is 31 % by weight, Si content is 55-65 % by weight, C content is < 0.8 % by weight, S content < 0.05 % by weight, P content < 0.04 % by weight, Al content is 2 % by weight).
According to cored-wire of the present invention, preferred described endothelium and crust are sheetmetal or iron sheet separately.
The present invention is to the material of described iron sheet or sheetmetal without particular requirement, and it can be that the routine of this area is selected, and the present invention is not described in detail at this.
According to cored-wire of the present invention, the thickness of preferred described endothelium and crust is 0.1-1mm separately, is preferably 0.2-0.5mm.Adopt aforementioned cored-wire to carry out molten steel Ti Alloying, titanium recovery rate is high and stable, and the titanium alloy steel yield strength obtained after the Ti Alloying molten steel casting obtained and tensile strength high.
According to cored-wire of the present invention, the diameter of preferred described cored-wire is 12-20mm.Adopt aforementioned cored-wire to carry out molten steel Ti Alloying, titanium recovery rate is high and stable, and the titanium alloy steel yield strength obtained after the Ti Alloying molten steel casting obtained and tensile strength high.
The cored-wire with aforementioned component of the present invention all can realize object of the present invention, and its preparation method can be that the routine of this area is selected, and the present invention is not described in detail at this.
The invention provides titanium calcium silicon composite core-spun yarn of the present invention and prepare the application in Ti Alloying molten steel.
The invention provides a kind of preparation method of Ti Alloying molten steel, the method comprises: titanium calcium silicon composite core-spun yarn feeding of the present invention treated to carry out Ti Alloying in titanium alloyed molten steel.
Preparation in accordance with the present invention, treats that titanium alloyed molten steel is the molten steel of carbon silicomanganese preferably, and described in treat that the temperature of titanium alloyed molten steel is 1550-1600 DEG C.
Preparation in accordance with the present invention, feed fast in molten steel to be conducive to cored-wire, simultaneously in order to improve yield strength and the tensile strength of titanium alloy steel, preferably carry out Ti Alloying in a dynamic condition, dynamic condition can by rocking ladle or rotating to realize, such as while cored-wire feeds in the molten steel in ladle by Yarn feeding device, ladle can be rocked.
Preparation in accordance with the present invention, wherein, is carrying out in Ti Alloying process, preferably by cored-wire by the molten steel in Yarn feeding device feeding ladle in while, the contact area of cored-wire and molten steel is jetted rare gas element.
In the present invention, rare gas element can be that the routine of this area is selected, such as, can be argon gas.
Preparation in accordance with the present invention, by rare gas element of jetting to cored-wire and steel contacts region, the mobility of the slag in this region can be improved on the one hand, can prevent the slag beyond this region from collecting towards this zone flows on the other hand, yield strength and the tensile strength of titanium alloy steel can be improved simultaneously, especially rocking in process to ladle, the slag in other region likely flows near cored-wire, by rare gas element of jetting near cored-wire, the quick feeding of cored-wire effectively can be ensured.
Preparation in accordance with the present invention, wherein, the speed of preferred cored-wire feeding is 3-10 meter per second.
The invention provides the Ti Alloying molten steel that method of the present invention obtains.
The invention provides a kind of titaniferous steel alloy, wherein, this titaniferous steel alloy is formed by Ti Alloying molten steel casting of the present invention.
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, titanium content adopts chromotropic acid light-intensity method to record.
Titanium recovery rate is by measuring the forward and backward titanium content of molten steel feeding cored-wire, again in conjunction with total titanium amount that cored-wire is brought into, by calculating, be specially: total titanium amount that titanium recovery rate=(titanium content before the titanium content after molten steel feeding cored-wire-molten steel feeding cored-wire) × tap/cored-wire is brought into.
In the present invention, tensile property is according to GB/T228(metallic substance tensile testing at ambient temperature) carry out, detect yield strength ReL, tensile strength Rm respectively.
In the present invention, the powder of target particles granularity can be obtained after crushing material by standard sieve screening.
Embodiment 1
A kind of cored-wire A1(external diameter is 12mm), comprise endothelium, crust, calcium silica flour (trade mark Ca31Si60, granularity≤2mm, Ca content in calcium silica flour is 31 % by weight, Si content is 58 % by weight, C content is < 0.8 % by weight, S content < 0.05 % by weight, P content < 0.04 % by weight, Al content is 2 % by weight) and titanium-iron powder (trade mark FeTi70, granularity≤1.5mm, containing the Ti of 67 % by weight, the C of < 0.5 % by weight, the S of < 0.05 % by weight, surplus is Fe), crust (thick 0.5mm) and endothelium (thick 0.5mm) are made by cold rolled strip (trade mark St12), described interior intracutaneous wraps up described titanium-iron powder, described calcium silica flour is filled between described endothelium and crust, the weight ratio of described titanium-iron powder and calcium silica flour is 8:1.
Embodiment 2
A kind of cored-wire A2(external diameter is 12mm), comprise endothelium, crust, calcium silica flour (trade mark Ca31Si60, granularity≤1.3mm, Ca content in calcium silica flour is 31 % by weight, Si content is 60 % by weight, C content is < 0.8 % by weight, S content < 0.05 % by weight, P content < 0.04 % by weight, Al content is 2 % by weight) and titanium-iron powder (trade mark FeTi60, granularity≤1.5mm, containing the Ti of 58 % by weight, the C of < 0.5 % by weight, the S of < 0.05 % by weight, surplus is Fe), crust (thick 0.4mm) and endothelium (thick 0.4mm) are made by cold rolled strip (trade mark St12), described interior intracutaneous wraps up described titanium-iron powder, described calcium silica flour is filled between described endothelium and crust, the weight ratio of described titanium-iron powder and calcium silica flour is 6:1.
Embodiment 3
A kind of cored-wire A3(external diameter is 12mm), comprise endothelium, crust, calcium silica flour (trade mark Ca28Si60, granularity≤2mm, Ca content in calcium silica flour is 28 % by weight, Si content is 59 % by weight, C content is < 0.8 % by weight, S content < 0.05 % by weight, P content < 0.04 % by weight, Al content is 2 % by weight) and titanium-iron powder (trade mark FeTi55, granularity≤1.5mm, containing the Ti of 55 % by weight, the C of < 0.4 % by weight, the S of < 0.05 % by weight, surplus is Fe), crust (thick 0.2mm) and endothelium (thick 0.3mm) are made by cold rolled strip (trade mark St12), described interior intracutaneous wraps up described titanium-iron powder, described calcium silica flour is filled between described endothelium and crust, the weight ratio of described titanium-iron powder and calcium silica flour is 5:1.
Embodiment 4
Identical with the cored-wire of embodiment 1, unlike, the weight ratio of titanium-iron powder and calcium silica flour is 10:1.
Embodiment 5
Identical with the cored-wire of embodiment 1, unlike, the thickness of endothelium and crust is 0.1mm, 1mm separately.
Embodiment 6
Identical with the cored-wire of embodiment 1, unlike, the thickness of endothelium and crust is 1mm, 0.1mm separately.
Embodiment 7
Identical with the cored-wire of embodiment 1, unlike, calcium silica flour is Ca24Si60(granularity≤2mm, Ca content in calcium silica flour is 31 % by weight, Si content is 58 % by weight, and C content is < 0.8 % by weight, S content < 0.05 % by weight, P content < 0.04 % by weight, Al content is 2 % by weight).
Embodiment 8
Identical with the cored-wire of embodiment 1, unlike, titanium-iron powder is (surplus is Fe for trade mark FeTi35, granularity≤2.5mm, the S of the C containing the Ti of 33 % by weight, < 0.5 % by weight, < 0.05 % by weight).
Comparative example 1
Identical with the cored-wire of embodiment 1, unlike, calcium silica flour by etc. the titanium-iron powder of weight replace (namely cored-wire only contains titanium-iron powder not calcic silica flour).
Preparation example
Cored-wire A1-A8 is adopted to flow production C content 0.15-0.20 % by weight on billet caster at 120 tons of converters+120 tons of LF stove refining furnace+6 machines 6, Mn content 0.30-0.50 % by weight, Si content 0.15-0.35 % by weight, titanium content 0.04-0.06 % by weight, phosphorus content is not more than 0.025 % by weight, sulphur content is not more than the Q345B steel of 0.015 % by weight, specifically carries out as follows:
First in converter, add 140 tons of molten iron, Converter Oxigen Blowing is utilized to take off the function of C, be smelt molten steel by the beginning of molten iron, tap in ladle when the C in molten steel just refines 0.06 % by weight, now actual tap is 133 tons (in the first refining process of converter, the raw material of about 5 % by weight is burnt).In molten steel, FeSi, FeMn alloy is added and hard coal carries out Si, Mn and C element alloying in tapping process, after alloying, in molten steel, C content is 0.16 % by weight, Mn content is 0.45 % by weight, P content is 0.015 % by weight, S content is 0.010 % by weight, now sample in molten steel, after the sample cooling of taking-up, the titanium content measured in steel is 0.001 % by weight.
Molten steel starts electrically heated after arriving LF stove, heating is stopped when liquid steel temperature is heated to 1575 DEG C, also rock ladle with feeding wire machine feeding cored-wire simultaneously, the contact area of cored-wire and molten steel is jetted rare gas element (rare gas element is argon gas) simultaneously, to prepare the Ti Alloying molten steel of required titanium content, the titanium recovery rate (the results are shown in Table 1) of this process; Then flow on billet caster at 6 machines 6 and Ti Alloying molten steel casting become 180mm × 1530mm strand, after rolling, become a useful person for thick for 16mm, wide 2000mm finished steel plate, its titanium content is 0.05 % by weight, and yield strength and tensile strength are in table 1.
Preparation comparative example 1
Finished Steel is prepared according to the method for preparation example, unlike, use cored-wire D1 to be prepared the steel of identical titanium content.
Preparation comparative example 2
Cored-wire D1 is adopted to flow production C content 0.15-0.20 % by weight on billet caster at 120 tons of converters+120 tons of LF stove refining furnace+6 machines 6, Mn content 0.30-0.50 % by weight, titanium content 0.04-0.06 % by weight, phosphorus content is not more than 0.025 % by weight, sulphur content is not more than the Q345B steel of 0.015 % by weight, specifically carries out as follows:
First in converter, add 140 tons of molten iron, Converter Oxigen Blowing is utilized to take off the function of C, be smelt molten steel by the beginning of molten iron, tap in ladle when the C in molten steel just refines 0.06 % by weight, now actual tap is 133 tons (in the first refining process of converter, the raw material of about 5 % by weight is burnt).In molten steel, FeSi, FeMn alloy is added and hard coal carries out Si, Mn and C element alloying in tapping process, after alloying, in molten steel, C content is 0.16 % by weight, Mn content is 0.45 % by weight, Si content is 0.30 % by weight, P content is 0.015 % by weight, S content is 0.010 % by weight, now samples in molten steel, and after the sample cooling of taking-up, the titanium content measured in steel is 0.001 % by weight.
Molten steel starts electrically heated after arriving LF stove, heating is stopped when liquid steel temperature is heated to 1575 DEG C, calcium silica flour (calcium silica flour is identical with the calcium silica flour amount of bringing in embodiment 1) is added in molten steel, also rock ladle with feeding wire machine feeding cored-wire D1 simultaneously simultaneously, the contact area of cored-wire and molten steel is jetted rare gas element (rare gas element is argon gas) simultaneously, to prepare the Ti Alloying molten steel of required titanium content, the titanium recovery rate (the results are shown in Table 1) of this process; Then flow on billet caster at 6 machines 6 and Ti Alloying molten steel casting become 180mm × 1530mm strand, after rolling, become a useful person for thick for 16mm, wide 2000mm finished steel plate, its titanium content is 0.05 % by weight, and yield strength and tensile strength are in table 1.
Table 1
In table 1, be all in C content, Mn content, calcium contents, the contrast of performance data of each Finished Steel under the condition that silicone content is identical and the contrast of titanium recovery rate.
As can be seen from the data of table 1, of the present invention preferred embodiment in, cored-wire of the present invention is for realizing the alloying of titanium, and the rate of recovery of titanium is high and stable (basic guarantee is between 80%-85%).And the titanium alloy steel yield strength obtained after adopt cored-wire of the present invention to carry out Ti Alloying molten steel casting that molten steel Ti Alloying obtains and tensile strength high.
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 characteristic described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode.
In addition, also can carry out arbitrary combination between various different 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 (10)
1. a titanium calcium silicon composite core-spun yarn, it is characterized in that, this cored-wire comprises: endothelium, crust, calcium silica flour and titanium-iron powder, described interior intracutaneous wraps up described titanium-iron powder, fills described calcium silica flour between described endothelium and crust, and the weight ratio of described titanium-iron powder and calcium silica flour is 5-8:1, Ti containing 40-85 % by weight in described titanium-iron powder, the S of the C of < 5 % by weight, < 0.05 % by weight, surplus is Fe; Ca content in calcium silica flour is 25-35 % by weight, Si content is 50-70 % by weight, and C content is < 1.0 % by weight, S content < 0.05 % by weight, P content < 0.05 % by weight, Al content is 1-5 % by weight.
2. cored-wire according to claim 1, wherein, the granularity≤2mm of calcium silica flour, the granularity≤1.5mm of titanium-iron powder.
3. cored-wire according to claim 1, wherein, described endothelium and crust are sheetmetal or iron sheet separately; The thickness of described endothelium and crust is 0.1-1mm separately.
4. cored-wire according to claim 1, wherein, the diameter of described cored-wire is 12-20mm.
5. the titanium calcium silicon composite core-spun yarn in claim 1-4 described in any one is preparing the application in Ti Alloying molten steel.
6. a preparation method for Ti Alloying molten steel, the method comprises: the titanium calcium silicon composite core-spun yarn feeding in claim 1-4 described in any one treated to carry out Ti Alloying in titanium alloyed molten steel.
7. preparation method according to claim 6, wherein, described in treat that titanium alloyed molten steel is the molten steel of carbon silicomanganese, and described in treat that the temperature of titanium alloyed molten steel is 1550-1600 DEG C.
8. the preparation method according to claim 6 or 7, wherein, carries out Ti Alloying in a dynamic condition, and while cored-wire feeding is treated in titanium alloyed molten steel, to jet rare gas element to the contact area of cored-wire and described molten steel.
9. the Ti Alloying molten steel that the method in claim 6-8 described in any one obtains.
10. a titaniferous steel alloy, is characterized in that, this titaniferous steel alloy is formed by Ti Alloying molten steel casting according to claim 9.
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| CN201410139539.5A CN103911482B (en) | 2014-04-08 | 2014-04-08 | Titanium calcium silicon composite core-spun yarn and application thereof and Ti Alloying molten steel and preparation method thereof and a kind of titaniferous steel alloy |
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| CN103911482B true CN103911482B (en) | 2016-01-06 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202480458U (en) * | 2012-02-10 | 2012-10-10 | 刘小建 | Composite core-spun yarn |
| CN202945266U (en) * | 2012-11-29 | 2013-05-22 | 湖北上大模具材料科技有限公司 | Composite calcium metal cored wire |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE19916234C2 (en) * | 1999-03-01 | 2001-03-08 | Odermath Stahlwerkstechnik | Cored wire for the treatment of melts by wire injection |
| CN201785437U (en) * | 2010-09-03 | 2011-04-06 | 安帝铁合金(天津)有限公司 | Novel middle thread of core-spun thread |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202480458U (en) * | 2012-02-10 | 2012-10-10 | 刘小建 | Composite core-spun yarn |
| CN202945266U (en) * | 2012-11-29 | 2013-05-22 | 湖北上大模具材料科技有限公司 | Composite calcium metal cored wire |
Non-Patent Citations (1)
| Title |
|---|
| "近年我国炼钢用终脱氧合金材料的发展与应用";戴栋;《河北冶金》;19961031(第5期);第21-27页 * |
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