CN103911542A - Titanium-magnesium composite core-spun yarn and application thereof, titanium alloying molten steel and preparation method thereof, and titanium-containing alloy steel - Google Patents
Titanium-magnesium composite core-spun yarn and application thereof, titanium alloying molten steel and preparation method thereof, and titanium-containing alloy steel Download PDFInfo
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Abstract
The invention provides a titanium-magnesium composite core-spun yarn which comprises a core layer and an outer layer wrapped outside the core layer, wherein the core layer contains titanium-iron powder and magnesium powder. The invention provides application of the titanium-magnesium composite core-spun yarn in preparing titanium alloying molten steel. The invention provides a preparation method of the titanium alloying molten steel, which comprises the following steps: feeding the titanium-magnesium composite core-spun yarn into molten steel to be subjected to titanium alloying, and carrying out titanium alloying. The invention provides a titanium alloying molten steel prepared by the method. The invention provides a titanium-containing alloy steel which is prepared by casting the titanium alloying molten steel. In the preferable embodiment, the core-spun yarn is used for implementing titanium alloying of molten steel, and the titanium recovery rate is high and stable (80-85%), thereby effectively enhancing the quality of the molten steel.
Description
Technical field
The present invention relates to a kind of titanium magnesium 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 guaranteeing various physics, the chemical property of steel, need in steel, add alloy addition its composition to be adjusted to the operation of specialized range.Element that do not have in ordinary steel or that content is less (C, Si, Mn, S or P) all belongs to alloying element.Alloy addition can be both pure material (nickel, copper, aluminium, Graphite Powder 99 etc.), can be also iron alloy (ferromanganese, ferrosilicon, vanadium iron, ferrotianium etc.), also 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 or add in smelting process with furnace charge; And Ti, V, Cr, Si, Mn, Al etc. are strong with the avidity of oxygen, be that (or in ladle) has been added to fully in the molten steel of deoxidation before coming out of the stove.Can the large iron alloy of add-on in stove, its lumpiness compared with great talent easily through slag blanket.In ladle, add fashionablely, it is few that iron alloy reacts with slag, and the rate of recovery is higher, the granular iron alloy that the most handy process is broken.Ferromanganese that consumption is large, ferrosilicon, ferrochrome, nickel etc., add molten steel network minimal with bulk, conventionally can adopt and simply add method.
Titanium can improve the high temperature hardening capacity of steel, and the effect that forms carbide tendency, crystal grain thinning is large, can improve intensity, hardness and ductility, joins in stainless steel and can improve erosion resistance.At present, STEELMAKING PRODUCTION all adopts ferro-titanium piece to add after deoxidation of molten steel completes in the time of Ti Alloying, and 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 S is 0-10%, and the weight percent content of Fe is 0-20%, and the weight percent content of Bi is 50-100%.
Chinese patent application 200510019893.5 discloses aluminium-rare-earth core-spun yarn, and this cored-wire has adopted containing the improvement of rare earth metal the aluminium-rare-earth heart yearn of intensity, contains the rare earth metal that mass percent is 0.001-3%.
Chinese patent application 201120149390.0 discloses cored-wire, and this cored-wire comprises the sandwich layer of being made up of alloy of vanadium nitride and is wrapped in outside exodermis, is enclosed with successively from inside to outside mesh-supported layer and fluorite layer between described sandwich layer and exodermis.
Chinese patent application 201120507605.1 discloses cored-wire, and this cored-wire comprises sandwich layer and be wrapped in the sheetmetal layer of described sandwich layer outside, and described sandwich layer is titanium silicon layer.In addition, between described titanium silicon layer and sheetmetal layer, be enclosed with successively from inside to outside mesh-supported layer and alloy of vanadium nitride layer.By feeding wire machine, cored-wire is fed to molten steel depths, can effectively improve the rate of recovery of titanium, can make stable being controlled at more than 75% of the rate of recovery of titanium, 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 outside bark graft mouth inwardly turn down, 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 and the associated alloys powder that are filled in this cored-wire shell, wherein, described cored-wire shell is by the soft steel roll coil of strip and forming, 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 and cored-wire, described low-nitrogen ferrotitanium is 70Fe-Ti alloy, containing the 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%, and silicon≤0.5%, carbon≤0.1%, phosphorus≤0.04%, and sulphur≤0.03%, surplus is iron.
Chinese patent application 201120506301.3 discloses a kind of low-nitrogen ferrotitanium cored-wire, core material is to be crushed to the low-nitrogen ferrotitanium powder that is less than 2mm, low-nitrogen ferrotitanium line material directly enters extrusion machine after heating by diathermic furnace, continuously extruded one-tenth solid wire material, become cored-wire by the direct winding of core cabling wire machine and steel band, guarantee that low-nitrogen ferrotitanium line material and air are short duration of contact, make 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.The composite core-spun yarn that adopts ferro-boron and ferrotianium feeds in molten steel ferrotianium and ferro-boron simultaneously, the control of boron content in the alloying operation of simplification 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 that contains titanium.
Summary of the invention
The object of the present invention is to provide one can be used in and produce titaniferous steel alloy, and the high and stable titanium magnesium composite core-spun yarn of the rate of recovery of titanium.
Molten steel alloying should be accomplished low consumption, high-level efficiency, high quality.Therefore, when most suitable alloy addition is selected, should consider the height of different additive total cost, also will consider its purity or impurity content.Conventionally, 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, yield reducation, energy consumption are strengthened.Therefore, while 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.For example, though the fusing point of titanium more than 1700 ℃, titanium is 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 dissolution rate are exerted an influence.The density of additive, add mode also significant to stabilizing and increasing of the rate of recovery.
Amid all these factors analyze and consider, the application's applicant finds with theoretical derivation through the long-term experiment of groping, in the time carrying out alloying in the face of the cored-wire that need to use titaniferous, the rate of recovery and the stability of the titanium while adding magnesium powder can improve cored-wire for alloying.
For realizing aforementioned object, according to a first aspect of the invention, the invention provides a kind of titanium magnesium composite core-spun yarn, this cored-wire comprises: the skin of sandwich layer and the described sandwich layer of parcel, described sandwich layer contains titanium-iron powder and magnesium powder.
According to a second aspect of the invention, the invention provides titanium magnesium composite core-spun yarn of the present invention in the application of preparing 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 magnesium composite core-spun yarn of the present invention feeding is treated to carry out in titanium alloyed molten steel Ti Alloying.
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 the preferred embodiment of the present 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%, has effectively improved steel quality.And it is high to adopt cored-wire of the present invention to carry out the titanium alloy steel yield strength and the tensile strength that after Ti Alloying molten steel casting that molten steel Ti Alloying obtains, obtain.
Other features and advantages of the present invention are described in detail the embodiment part subsequently.
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.
The invention provides a kind of titanium magnesium composite core-spun yarn, wherein, this cored-wire comprises: the skin of sandwich layer and the described sandwich layer of parcel, described sandwich layer contains titanium-iron powder and magnesium 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 and the tensile strength that after the Ti Alloying molten steel casting obtaining, obtain are high.
According to cored-wire of the present invention, the weight ratio of preferred described titanium-iron powder and magnesium powder is 8-10:1.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 and the tensile strength that after the Ti Alloying molten steel casting obtaining, obtain are high.
According to cored-wire of the present invention, the Ti that contains 40-85 % by weight in preferred described titanium-iron powder, preferably contains the Ti of 50-70 % by weight, the C of < 5 % by weight, and the S of < 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 and the tensile strength that after the Ti Alloying molten steel casting obtaining, obtain are high.
According to cored-wire of the present invention, Mg content > 99 % by weight in preferably magnesium powder, S content < 0.05 % 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 and the tensile strength that after the Ti Alloying molten steel casting obtaining, obtain are high.
According to cored-wire of the present invention, the granularity≤1.5mm of preferably magnesium powder, 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 and the tensile strength that after the Ti Alloying molten steel casting obtaining, obtain are high.
According to the preferred embodiment of the present invention, described titanium-iron powder is titanium-iron powder (granularity≤1.5mm of trade mark FeTi70, the Ti that contains 67 % by weight, the C of < 0.5 % by weight, the S of < 0.05 % by weight, surplus is Fe), titanium-iron powder (granularity≤1.5mm of trade mark FeTi60, the Ti that contains 58 % by weight, the C of < 0.5 % by weight, the S of < 0.05 % by weight, surplus is Fe), titanium-iron powder (granularity≤1.5mm of trade mark FeTi55, the Ti that contains 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, magnesium powder that described magnesium powder is trade mark MF99 (granularity≤1.5mm, or≤1.3mm, or≤1.25mm, the Mg content in magnesium powder is 99.6 % by weight, S content < 0.05 % by weight).
According to cored-wire of the present invention, preferred described skin is sheetmetal or iron sheet, and more preferably described outer field thickness is 1-2mm.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 and the tensile strength that after the Ti Alloying molten steel casting obtaining, obtain are high.
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.
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 and the tensile strength that after the Ti Alloying molten steel casting obtaining, obtain are high.
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, and the present invention is not described in detail at this.
The invention provides titanium magnesium composite core-spun yarn of the present invention in the application of preparing in Ti Alloying molten steel.
The preparation method who the invention provides a kind of Ti Alloying molten steel, the method comprises: titanium magnesium composite core-spun yarn of the present invention feeding is treated to carry out in titanium alloyed molten steel Ti Alloying.
Preparation in accordance with the present invention, treats that titanium alloyed molten steel is the molten steel of carbon silicomanganese described in preferably, and described in treat that the temperature of titanium alloyed molten steel is 1550-1600 ℃.
Preparation in accordance with the present invention, feed fast in molten steel in order to be conducive to cored-wire, simultaneously in order to improve yield strength and the tensile strength of titanium alloy steel, preferably under dynamic condition, carry out Ti Alloying, dynamic condition can be by rocking ladle or rotating and realize, for example, in can be in cored-wire feeds the molten steel in ladle by Yarn feeding device, ladle be rocked.
Preparation in accordance with the present invention, wherein, carrying out in Ti Alloying 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 argon gas.
Preparation in accordance with 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 yield strength and the tensile strength of titanium alloy 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 guarantee the quick feeding of cored-wire.
Preparation in accordance with the present invention, wherein, preferably the speed of 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, total titanium amount of bringing in conjunction with cored-wire again, by calculating, be specially: total titanium amount that titanium recovery rate=(titanium content before the titanium content-molten steel feeding cored-wire after 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 respectively yield strength ReL, tensile strength Rm.
In the present invention, the powder of target particles granularity can will be sieved and be obtained by standard sieve after crushing material.
Embodiment 1
A kind of cored-wire A1(external diameter is 12mm), comprise the skin of sandwich layer and parcel sandwich layer, described sandwich layer is by magnesium powder (trade mark MF99, granularity≤1.5mm, Mg content in magnesium powder is 99.6 % by weight, S content < 0.05 % by weight), titanium-iron powder (trade mark FeTi70, granularity≤1.5mm, the Ti that contains 67 % by weight, the C of < 0.5 % by weight, the S of < 0.05 % by weight, surplus is Fe) composition powder, the outer crust (thick 2mm) of making for cold rolled strip (trade mark St12), the weight ratio of described titanium-iron powder and magnesium powder is 8:1.
Embodiment 2
A kind of cored-wire A2(external diameter is 12mm), comprise the skin of sandwich layer and parcel sandwich layer, described sandwich layer is by magnesium powder (trade mark MF99, granularity≤1.25mm, Mg content in magnesium powder is 99.6 % by weight, S content < 0.05 % by weight), titanium-iron powder (trade mark FeTi60, granularity≤1.5mm, the Ti that contains 58 % by weight, the C of < 0.5 % by weight, the S of < 0.05 % by weight, surplus is Fe) composition powder, the outer crust (thick 1mm) of making for cold rolled strip (trade mark St12), the weight ratio of described titanium-iron powder and magnesium powder is 9:1.
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 magnesium powder (trade mark MF99, granularity≤1.3m, Mg content in magnesium powder is 99.6 % by weight, S content < 0.05 % by weight), titanium-iron powder (trade mark FeTi55, granularity≤1.5mm, the Ti that contains 55 % by weight, the C of < 0.4 % by weight, the S of < 0.05 % by weight, surplus is Fe) composition powder, the outer crust (thick 1.5mm) of making for cold rolled strip (trade mark St12), the weight ratio of described titanium-iron powder and magnesium powder is 10:1.
Embodiment 4
Identical with the cored-wire of embodiment 1, different, the weight ratio of titanium-iron powder and magnesium powder is 13:1.
Embodiment 5
Identical with the cored-wire of embodiment 1, different, the thickness of crust is 0.1mm.
Embodiment 6
Identical with the cored-wire of embodiment 1, different, the thickness of crust is 3mm.
Embodiment 7
Identical with the cored-wire of embodiment 1, different, magnesium powder is (the Mg content in magnesium powder is 79.6 % by weight for trade mark MF80, granularity≤2.5mm, S content < 0.05 % by weight).
Embodiment 8
Identical with the cored-wire of embodiment 1, different, titanium-iron powder is (Ti that contains 33 % by weight, the C of < 0.5 % by weight, the S of < 0.05 % by weight, surplus is Fe for trade mark FeTi35, granularity≤2.5mm).
Comparative example 1
Identical with the cored-wire of embodiment 1, different, magnesium powder by etc. the titanium-iron powder of weight replace (be cored-wire only containing titanium-iron powder containing magnesium powder).
Preparation example
Ton LF stove refining furnace+6 machine 6 flows and on billet caster, produces C content 0.15-0.20 % by weight 120 tons of converter+120 to adopt cored-wire A1-A8, 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, the Q345B steel that sulphur content is not more than 0.015 % 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 0.06 % 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 to add FeSi, FeMn alloy and hard coal to carry out Si, Mn in molten steel and C element alloyed, 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 in molten steel, samples, and the titanium content in the cooling rear mensuration steel of sample of taking-up is 0.001 % by weight.
Molten steel starts electrically heated after arriving LF stove, in the time that being heated to 1575 ℃, 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 argon gas) to cored-wire and molten steel 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 and Ti Alloying molten steel casting is become to 180mm × 1530mm strand at 6 machines 6, after rolling, become a useful person for the thick finished steel plate for 16mm, wide 2000mm, its titanium content is 0.05 % by weight, and yield strength and tensile strength are in table 1.
Preparation comparative example 1
Method according to preparation example is prepared Finished Steel, different, uses cored-wire D1 to be prepared the steel of identical titanium content.
Preparation comparative example 2
Ton LF stove refining furnace+6 machine 6 flows and on billet caster, produces C content 0.15-0.20 % by weight 120 tons of converter+120 to adopt cored-wire D1, 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, the Q345B steel that sulphur content is not more than 0.015 % 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 0.06 % 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 to add FeSi, FeMn alloy and hard coal to carry out Si, Mn in molten steel and C element alloyed, 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 in molten steel, samples, and the titanium content in the cooling rear mensuration steel of sample of taking-up is 0.001 % by weight.
Molten steel starts electrically heated after arriving LF stove, in the time that being heated to 1575 ℃, liquid steel temperature stops heating, in molten steel, add magnesium powder (magnesium powder is identical with the magnesium powder amount of bringing in preparation example 1), also rock ladle with feeding wire machine feeding cored-wire D1 simultaneously simultaneously, contact area winding-up rare gas element (rare gas element is argon gas) to cored-wire and molten steel 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 and Ti Alloying molten steel casting is become to 180mm × 1530mm strand at 6 machines 6, after rolling, become a useful person for the thick finished steel plate for 16mm, wide 2000mm, 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 at C content, Mn content, calcium contents, the contrast of performance data and the contrast of titanium recovery rate of each Finished Steel under the identical condition of silicone content.
Data by table 1 can find out, of the present invention preferred embodiment in, cored-wire of the present invention is for realizing the alloying of titanium, the rate of recovery high and stable (basic guarantee is between 80%-85%) of titanium.And it is high to adopt cored-wire of the present invention to carry out the titanium alloy steel yield strength and the tensile strength that after Ti Alloying molten steel casting that molten steel Ti Alloying obtains, obtain.
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 (12)
1. a titanium magnesium composite core-spun yarn, is characterized in that, this cored-wire comprises: the skin of sandwich layer and the described sandwich layer of parcel, described sandwich layer contains titanium-iron powder and magnesium powder.
2. cored-wire according to claim 1, wherein, the weight ratio of described titanium-iron powder and magnesium powder is 8-10:1.
3. cored-wire according to claim 1, wherein, contains the Ti of 40-85 % by weight in described titanium-iron powder, the C of < 5 % by weight, and the S of < 0.05 % by weight, surplus is Fe; Mg content > 99 % by weight in magnesium powder, S content < 0.05 % by weight.
4. cored-wire according to claim 1, wherein, the granularity≤1.5mm of magnesium powder, the granularity≤1.5mm of titanium-iron powder.
5. cored-wire according to claim 1, wherein, described skin is sheetmetal or iron sheet; Described outer field thickness is 1-2mm.
6. cored-wire according to claim 1, wherein, the diameter of described cored-wire is 12-20mm.
In claim 1-6 the titanium magnesium composite core-spun yarn described in any one in the application of preparing in Ti Alloying molten steel.
8. a preparation method for Ti Alloying molten steel, the method comprises: the titanium magnesium composite core-spun yarn feeding described in any one in claim 1-6 is treated to carry out in titanium alloyed molten steel Ti Alloying.
9. preparation method according to claim 8, 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 ℃.
10. preparation method according to claim 8 or claim 9 wherein, carries out Ti Alloying under dynamic condition, and in titanium alloyed molten steel is treated in cored-wire feeding, to the contact area of cored-wire and the described molten steel rare gas element of jetting.
The Ti Alloying molten steel that method in 11. claim 8-10 described in any one obtains.
12. 1 kinds of titaniferous steel alloys, is characterized in that, this titaniferous steel alloy is formed by the Ti Alloying molten steel casting described in claim 11.
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| CN103911542B (en) | 2015-09-16 |
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