CN106676232A - Solid calcium metal, ferrosilicon and high-titanium titanium silicon nitride alloy powder composite core-spun yarn - Google Patents
Solid calcium metal, ferrosilicon and high-titanium titanium silicon nitride alloy powder composite core-spun yarn Download PDFInfo
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- CN106676232A CN106676232A CN201611017054.4A CN201611017054A CN106676232A CN 106676232 A CN106676232 A CN 106676232A CN 201611017054 A CN201611017054 A CN 201611017054A CN 106676232 A CN106676232 A CN 106676232A
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- 239000011575 calcium Substances 0.000 title claims abstract description 65
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 title claims abstract description 61
- 229910052791 calcium Inorganic materials 0.000 title claims abstract description 61
- 239000000843 powder Substances 0.000 title claims abstract description 61
- 229910052581 Si3N4 Inorganic materials 0.000 title claims abstract description 59
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 50
- 239000002184 metal Substances 0.000 title claims abstract description 50
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 37
- 239000000956 alloy Substances 0.000 title claims abstract description 37
- 229910000519 Ferrosilicon Inorganic materials 0.000 title claims abstract description 36
- 239000010936 titanium Substances 0.000 title claims abstract description 35
- UGACIEPFGXRWCH-UHFFFAOYSA-N [Si].[Ti] Chemical compound [Si].[Ti] UGACIEPFGXRWCH-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 239000007787 solid Substances 0.000 title claims abstract description 21
- 239000002131 composite material Substances 0.000 title claims abstract description 16
- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 76
- 239000010959 steel Substances 0.000 claims abstract description 76
- 239000010410 layer Substances 0.000 claims abstract description 69
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 37
- WKORWMLYJIMJKA-UHFFFAOYSA-N [Si][Ti][Ti] Chemical compound [Si][Ti][Ti] WKORWMLYJIMJKA-UHFFFAOYSA-N 0.000 claims description 30
- 239000011241 protective layer Substances 0.000 claims description 16
- 239000002245 particle Substances 0.000 claims description 14
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 9
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical group [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 claims description 5
- 239000000470 constituent Substances 0.000 claims 1
- 239000011863 silicon-based powder Substances 0.000 claims 1
- 229910052742 iron Inorganic materials 0.000 abstract description 11
- 230000008901 benefit Effects 0.000 abstract description 10
- 239000012792 core layer Substances 0.000 abstract 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 24
- 238000011084 recovery Methods 0.000 description 15
- 229910052757 nitrogen Inorganic materials 0.000 description 14
- 239000013078 crystal Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 229910000859 α-Fe Inorganic materials 0.000 description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 229910001566 austenite Inorganic materials 0.000 description 7
- 238000006477 desulfuration reaction Methods 0.000 description 7
- 230000023556 desulfurization Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 238000001556 precipitation Methods 0.000 description 7
- 230000004044 response Effects 0.000 description 7
- 229910000742 Microalloyed steel Inorganic materials 0.000 description 6
- 238000005266 casting Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 230000001976 improved effect Effects 0.000 description 6
- 238000009628 steelmaking Methods 0.000 description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 5
- 238000005275 alloying Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000002893 slag Substances 0.000 description 5
- 229910052717 sulfur Inorganic materials 0.000 description 5
- 239000011593 sulfur Substances 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 108010041986 DNA Vaccines Proteins 0.000 description 3
- 229940021995 DNA vaccine Drugs 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000003500 flue dust Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000001953 recrystallisation Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910001021 Ferroalloy Inorganic materials 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910004709 CaSi Inorganic materials 0.000 description 1
- 229910000616 Ferromanganese Inorganic materials 0.000 description 1
- 229910001200 Ferrotitanium Inorganic materials 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- -1 alterant Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- OSMSIOKMMFKNIL-UHFFFAOYSA-N calcium;silicon Chemical compound [Ca]=[Si] OSMSIOKMMFKNIL-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000007850 degeneration Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0056—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires
-
- B22F1/0003—
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0006—Adding metallic additives
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C14/00—Alloys based on titanium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention relates to an alloy core-spun yarn, in particular to a solid calcium metal, ferrosilicon and high-titanium titanium silicon nitride alloy powder composite core-spun yarn. The core-spun yarn comprises a core layer and a sheet steel layer wrapping the core layer. A netty supporting layer made of steel or iron is arranged between the core layer and the sheet steel layer. The core layer comprises a ferrosilicon and titanium silicon nitride alloy powder layer, an intermediate protection layer and a solid calcium metal wire. The solid calcium metal wire is wrapped with the intermediate protection layer. The intermediate protection layer is wrapped with the ferrosilicon and titanium silicon nitride alloy powder layer. The ferrosilicon and titanium silicon nitride alloy powder layer is composed of ferrosilicon powder and high-titanium titanium silicon nitride alloy powder with the grain size being 3 mm or smaller. The mass ratio of the solid calcium metal wire to the ferrosilicon powder to the high-titanium titanium silicon nitride alloy powder is 1:1-2:2-5. The core-spun yarn has the advantages that the yield of the core-spun yarn is higher than that of conventional solid calcium metal wires, the hold time is longer, the yield is more stable, and the core-spun yarn has remarkable economic benefits.
Description
Technical field
The present invention relates to a kind of alloy claded wire.
Background technology
China is big steel country, but the ratio shared by the quantity and kind of high-quality steel is less, can not only meet China Jing
Ji builds the requirement with national defense construction, and the waste of resource is quite serious, and the cost for causing smelting iron and steel is continuously increased.Solution
Certainly the fundamental way of the problems referred to above is that the novel metallurgical subject-micro-alloying technology occurred using 20 century 70s is existed
Micro (0.001%-0.1%) alloying element is added in steel, just can be to the performance of steel (such as high intensity, high tenacity, good solderable
Property and corrosion resistance) reach significant improvement, while saving valuable alloying element, with reduces cost, this is traditional iron and steel
Produce the important symbol to modern production conversion.After the nineties in 20th century, the main iron and steel manufacturing country of China and the world is made in succession
Development plan that is fixed and implementing New Generation Steel PRODUCTION TRAITS, super fine organization, high-cleanness, high, high evenness micro alloyed steel into
For the Main Trends of The Development of ferrous materials.At present, micro alloyed steel accounts for the total ratio most of steel, and world average level is about 15%,
Industrialized country reaches 30%, and China is less than 5%, therefore China's urgent need micro-alloying technology transforms the original low-alloy of China
High-strength steel system, and micro alloyed steel kind and Iron ＆ Steel Material of New Generation that exploitation is badly in need of are combined with controlled rolling and controlled cooling.
Core-spun yarn is to be intended to add molten steel or the various additives (deoxidizer, desulfurizing agent, alterant, alloy etc.) in iron liquid
Certain granularity is broken into, is then included for a composite with random length with cold-rolled low carbon steel band.Cored
Line technology is a kind of external refining means for growing up on the basis of spraying metallurgy technology the eighties.Core-spun yarn is applied to steel-making
And casting.Steel inclusion morphology can be purified for steel-making, molten steel castability is improved, improves the performance of steel, and can significantly be carried
Low alloy-consumption, drops in heavy alloyed recovery rate, reduces steel-making cost, remarkable in economical benefits.
Titanium silicon nitride core-spun yarn is composite core-spun yarn new in screw-thread steel wire production.Add from the refine later stage, can
The recovery rate of nitrogen in steel titanium is improved, other ferroalloy consumptions is reduced, with significant economic benefit.Due to titanium silicon nitride alloy
Proportion kicks the beam（Iron content is lower than ferro-titanium by more than 30% in high titanium titanium silicon nitride alloy）, in adition process, swim in molten steel
Surface and combined with slag be oxidized, cause the recovery rate of titanium relatively low（Average out to 27%）, Ti content 0.0038% in steel, up to not
Require to internal quality control.And high titanium titanium silicon nitride alloy is fed in steel at Argon station by the form of core-spun yarn, on the one hand can be with
It is that alloy rapidly enters molten steel, it is to avoid alloy is aoxidized in molten steel by slag；On the other hand, through the molten steel oxygen of furnace rear deoxidation treatment
The property changed is low, it is possible to reduce the scaling loss of titanium, so as to improve and stablize the response rate of the titanium in steel.
Calcium treatment is the required technique of current special steel smelting, and molten steel Calcium treatment is will with injection metallurgical method or injection feeding technology
Calcium metal or alloy add molten steel deep, reach deoxidation, desulfurization, make the outer concise skill of stove of the metallurgical effects such as nonmetal inclusion degeneration
Art.Due to the fusing point of calcium metal it is low（838℃）, boiling point is also low（1450℃）, the dissolubility very little in molten steel（When 1600 DEG C,
It is 0.03% when calcium vapour pressure is 0.186MPa）, the density of calcium also very little（1.55g/cm3）, add in molten steel and easily float to steel
On slag surface with air in oxygen and in slag liquid oxide reaction and scaling loss is fallen.Therefore generally use the core-spun yarn containing calcium metal such as
CaSi core-spun yarns（Ca28%~32%）Or cafe core-spun yarns（Ca about 30%, Fe about 70%）, and to be added to molten metal as far as possible when processing
Deep, using the static pressure of molten metal, makes calcium react with oxygen, the sulfur etc. in steel before calcium bubble is become, be unlikely to one plus
Enter to reform into calcium bubble floating to lose.Even so, the recovery rate of calcium metal still only has 7~18% or so, substantial amounts of metal
Calcium all unnecessary wastes.Find through substantial amounts of research, by powder（Silicon calcium powder or calcium metal, iron powder）The core-spun yarn of composition is entered
Softened in the presence of high temperature after ladle, even if higher wire-feeding velocity, core-spun yarn cannot also penetrate high-temperature molten steel entrance
Deep, mostly positioned at the top of molten steel, it is easy to which scaling loss is fallen to slag surface to form calcium bubble floating.
The application for a patent for invention of applicant's application（Application number：201510160282.6, applying date 2015.04.07）It is open
A kind of titanium silicon nitride core-spun yarn, including sandwich layer and the sheetmetal layer that is wrapped in outside the sandwich layer, the sandwich layer is titanium silicon nitride
Alloy-layer, is provided with mesh-supported layer made by steel or ferrum between the sandwich layer and sheetmetal layer, the titanium silicon nitride alloy-layer is by grain
Footpath constitutes for the titanium silicon nitride alloying pellet of below 3mm.Carbon or nitrogen in the Ti of the invention and steel forms size for nano level
Compound, they are best to the thinning effect organized, and improve the intensity of ferrous materials, and nitrogen pick-up improves the stability of TiN granules, more
Effectively prevent Austenite Grain Growth.Cheap nitrogen is made full use of, in the case where certain intensity level is ensured, titanium can be saved
Addition, further reduce the cost of non-hardened and tempered steel.
The content of the invention
It is an object of the invention to provide a kind of solid calcium metal, ferrosilicon, high titanium titanium silicon nitride alloyed powder composite core-spun yarn, lead to
Cross that alloy and calcium are added in micro alloyed steel using the method for core-spun yarn and can not only solve the problems, such as that the response rate is low, while
Higher than conventional solid metal calcium line recovery rate, the holding time is longer, the more stable advantage of recovery rate, with significant Jing
Ji benefit.
In order to realize above-mentioned purpose, following technical scheme is present invention employs：
A kind of solid calcium metal, ferrosilicon, high titanium titanium silicon nitride alloyed powder composite core-spun yarn, the core-spun yarn includes sandwich layer and is wrapped in
Sheetmetal layer outside the sandwich layer, is provided with mesh-supported layer made by steel or ferrum between sandwich layer and sheetmetal layer, the sandwich layer includes
Ferrosilicon titanium silicon nitride alloyed powder last layer, intermediate protective layer and real core metal calcium line, real core metal calcium line is wrapped up by intermediate protective layer,
Ferrosilicon titanium silicon nitride alloyed powder last layer wraps up intermediate protective layer, and it is 3mm that described ferrosilicon titanium silicon nitride alloyed powder last layer is particle diameter
Following silicon iron powder and high titanium titanium silicon nitride alloy powder, real core metal calcium line and ferrosilicon, high titanium titanium silicon nitride alloy powder
Mass ratio be 1:1~2：2~5；Described high titanium titanium silicon nitride alloy powder is by mass percentage by elements below component structure
Into：
Al 1.0~2.5%
N 5~15%
Mn 2.5~5.0%
Mg 1.0~2.5%
Ti 40~60%
P ≤0.1%
S ≤0.1%
Si 35~50%；
Fe surpluses.
Preferably, high titanium titanium silicon nitride alloy powder is made up of by mass percentage elements below component：
Al 1.5~2.0%
N 8~12%
Mn 3.0~4.0%
Mg 1.5~2.0%
Ti 45~55%
P ≤0.1%
S ≤0.1%
Si 40~45%；
Fe surpluses.
It is 0.1 ~ 2.0mm as the granularity of preferred high titanium titanium silicon nitride alloy powder.
The present invention chooses sponge iron and titanium sponge and ferrosilicon and ferromanganese is smelted in a vacuum furnace.In certain process conditions
Under, nitrogenized, make nitridation reach optimum efficiency（Regulation content）, then pour into ingot casting.Ingot casting Jing is broken pure into certain particle size,
A diameter of 13 millimeters of core-spun yarn is overmolding to using iron sheet.This kind of core-spun yarn is inserted into steel in the refine later stage with certain payingoff speed
In liquid, Ti contents averagely reach the recovery rate average 60% of average 55%, the Si of the response rate of 0.008%, Ti in final steel.
Using intermediate protective layer（Box hat）, nexine reality core metal calcium line special construction so that the elevated temperature strength of core-spun yarn
Greatly improve, greatly improve the penetration capacity of core-spun yarn so that calcium metal can veritably be added to molten steel deep, using steel
Hydrostatic, makes calcium metal react with oxygen, sulfur etc. in steel before bubble is become, and greatly improves calcium metal recovery rate；It is golden in addition
The specific surface area of category calcium is substantially reduced, therefore reduces the gasification rate of calcium metal, increased calcium metal by molten steel absorb when
Between, thus the higher response rate can be obtained in molten steel and stablized.
It is composite core-spun yarn new in iron and steel production using solid calcium metal titanium silicon nitride alloyed powder composite core-spun yarn,
Add from the refine later stage, the recovery rate of nitrogen in steel titanium silicon can be improved, reduce other ferroalloy consumptions, with significant economic effect
Benefit.Its reason is that Ti and carbon or nitrogen in steel form size for nano level compound, and they are strong to having grown up for crystal grain
Inhibition, and the volume fraction shared by this nano level compound be 2% when, to organize thinning effect it is best.
Alloyed powder of the present invention by using the method for core-spun yarn to be added to micro alloyed steel in, with it is following the characteristics of：
1) austenite crystal grows up when preventing soaking：The micro alloyed steels such as Ti are not molten in heating before forging or rolling and soaking
The migration of the microalloy carbonitride Pinning austenite grain boundary of solution, prevents its crystal grain from growing up, thus makes micro alloyed steel in pressure
Just possess less austenite crystal before power processing, for further fining ferrite grains favourable condition is provided.
2) austenite recrystallization is prevented during ausforming：During ausforming, analysed by strain inducing
Crystal grain is grown up after the carbonitride precipitates of the Ti for going out can suppress deformed austeaite to recrystallize and recrystallize, and plays crystal grain thinning
Effect.Because the carbonitride particle preferential precipitation of the microalloy element of strain induced precipitate is in austenite crystal in hot procedure
On boundary, sub boundary and dislocation line, so as to the motion for effectively preventing crystal boundary, sub boundary and dislocation, its effect can not only be prevented
The beginning of recrystallization process, and the carrying out of recrystallization process can also be suppressed.
3) precipitation enhancement after ferrite transformation：After ausforming, will there is ferrite transformation, at this moment will there is big
The disperse microalloy carbonitride particle of amount is separated out, and these particles for separating out equally also play pinning effect to ferrite crystal grain, limit
Make it to grow up.On the other hand, these particles also play precipitation enhancement, improve the intensity of ferrous materials.
4）The size and its volume fraction of microalloy Carbonitride Precipitation particle plays a decisive role to ferrite grain size,
Precipitation particles is less, and volume fraction is bigger, and the ferrite crystal grain for being obtained is also less.Thus, effort has precipitation particles
Larger volume fraction and less size is the big target in grain refinement process, while being also the direction of invention.Adding
While entering these rare elements, while nitrogen pick-up, because Ti is changed after nitrogen pick-up in alternate distribution, promotes Ti (C, N
) separate out, the particle size for making precipitated phase is obviously reduced, and so as to enhance the precipitation enhancement of titanium, increases substantially steel
Intensity.Nitrogen is separated out by promoting Ti (C, N), and effectively pinning austenite-ferrite grain boundaries, have refined ferrite brilliant
Grain.Nitrogen pick-up may additionally facilitate the formation of Intragranular Acicular Ferrite, further refine ferritic structure.To Trace Titanium Treatment non-hardened and tempered steel,
Nitrogen pick-up improves the stability of TiN granules, more effectively prevents Austenite Grain Growth.Cheap nitrogen is made full use of,
Under ensureing certain intensity level, the addition of vanadium can be saved, further reduce the cost of non-hardened and tempered steel.
Specific embodiment
Embodiment 1
A kind of solid calcium metal, ferrosilicon, high titanium titanium silicon nitride alloyed powder composite core-spun yarn, the core-spun yarn includes sandwich layer and is wrapped in
Sheetmetal layer outside the sandwich layer, is provided with mesh-supported layer made by steel or ferrum between sandwich layer and sheetmetal layer, the sandwich layer includes
Ferrosilicon titanium silicon nitride alloyed powder last layer, intermediate protective layer and real core metal calcium line, real core metal calcium line is wrapped up by intermediate protective layer,
Ferrosilicon titanium silicon nitride alloyed powder last layer wraps up intermediate protective layer, and it is 3mm that described ferrosilicon titanium silicon nitride alloyed powder last layer is particle diameter
Following silicon iron powder and high titanium titanium silicon nitride alloy powder, real core metal calcium line and ferrosilicon, high titanium titanium silicon nitride alloy powder
Mass ratio be 1:1：3；Described high titanium titanium silicon nitride alloy powder is made up of by mass percentage elements below component：
Al 2.0%
N 10%
Mn 4.0%
Mg 2.0%
Ti 40%
P ≤0.1%
S ≤0.1%
Si 35%；
Fe surpluses.
This kind of core-spun yarn is inserted in molten steel in the refine later stage with certain payingoff speed, and Ti contents averagely reach in final steel
The recovery rate average 60% of average 55%, the Si of the response rate of 0.008%, Ti, the recovery rate of Ca is more stable after line feeding, averagely receives
Rate is 30%, average desulfurization degree 26%, highest desulfurization degree 33%, minimum sulfur content 0.006%, and average DNA vaccine 20% is minimum
Oxygen content 0.00082%, pouring molten steel is normal after line feeding, and slab quality is good, shows solid calcium metal cored wire of the present invention also
Inclusion modification can be promoted, molten steel is purified and improved pouring molten steel performance, and can be eliminated in tundish and casting process
Nozzle clogging phenomenon.And there was only a small amount of splash and Calcium treatment flue dust during line feeding, disclosure satisfy that current steel mill
The advantage of environmentally friendly steel-making requirements.
Embodiment 2
A kind of solid calcium metal, ferrosilicon, high titanium titanium silicon nitride alloyed powder composite core-spun yarn, the core-spun yarn includes sandwich layer and is wrapped in
Sheetmetal layer outside the sandwich layer, is provided with mesh-supported layer made by steel or ferrum between sandwich layer and sheetmetal layer, the sandwich layer includes
Ferrosilicon titanium silicon nitride alloyed powder last layer, intermediate protective layer and real core metal calcium line, real core metal calcium line is wrapped up by intermediate protective layer,
Ferrosilicon titanium silicon nitride alloyed powder last layer wraps up intermediate protective layer, and it is 3mm that described ferrosilicon titanium silicon nitride alloyed powder last layer is particle diameter
Following silicon iron powder and high titanium titanium silicon nitride alloy powder, real core metal calcium line and ferrosilicon, high titanium titanium silicon nitride alloy powder
Mass ratio be 1:1：4；Described high titanium titanium silicon nitride alloy powder is made up of by mass percentage elements below component：
Al 2.5%
N 5%
Mn 2.5%
Mg 2.0%
Ti 50%
P ≤0.1%
S ≤0.1%
Si 35%；
Fe surpluses.
This kind of core-spun yarn is inserted in molten steel in the refine later stage with certain payingoff speed, and Ti contents averagely reach in final steel
The recovery rate average 60% of average 55%, the Si of the response rate of 0.008%, Ti, the recovery rate of Ca is more stable after line feeding, averagely receives
Rate is 30%, average desulfurization degree 26%, highest desulfurization degree 33%, minimum sulfur content 0.006%, and average DNA vaccine 20% is minimum
Oxygen content 0.00082%, pouring molten steel is normal after line feeding, and slab quality is good, shows solid calcium metal cored wire of the present invention also
Inclusion modification can be promoted, molten steel is purified and improved pouring molten steel performance, and can be eliminated in tundish and casting process
Nozzle clogging phenomenon.And there was only a small amount of splash and Calcium treatment flue dust during line feeding, disclosure satisfy that current steel mill
The advantage of environmentally friendly steel-making requirements.
Embodiment 3
A kind of solid calcium metal, ferrosilicon, high titanium titanium silicon nitride alloyed powder composite core-spun yarn, the core-spun yarn includes sandwich layer and is wrapped in
A kind of solid calcium metal of institute, ferrosilicon, high titanium titanium silicon nitride alloyed powder composite core-spun yarn, the core-spun yarn includes sandwich layer and is wrapped in institute
The sheetmetal layer outside sandwich layer is stated, mesh-supported layer made by steel or ferrum is provided between sandwich layer and sheetmetal layer, the sandwich layer includes silicon
Ferrum titanium silicon nitride alloyed powder last layer, intermediate protective layer and real core metal calcium line, real core metal calcium line is wrapped up by intermediate protective layer, silicon
Ferrum titanium silicon nitride alloyed powder last layer wraps up intermediate protective layer, described ferrosilicon titanium silicon nitride alloyed powder last layer be particle diameter be 3mm with
Under silicon iron powder and high titanium titanium silicon nitride alloy powder, real core metal calcium line and ferrosilicon, high titanium titanium silicon nitride alloy powder
Mass ratio is 1:2：3；Described high titanium titanium silicon nitride alloy powder is made up of by mass percentage elements below component：
Al 2.5%
N 25%
Mn 2.5%
Mg 2.0%
Ti 30%
P ≤0.1%
S ≤0.1%
Si 30%；
Fe surpluses.
This kind of core-spun yarn is inserted in molten steel in the refine later stage with certain payingoff speed, and Ti contents averagely reach in final steel
The recovery rate average 60% of average 55%, the Si of the response rate of 0.008%, Ti, the recovery rate of Ca is more stable after line feeding, averagely receives
Rate is 30%, average desulfurization degree 26%, highest desulfurization degree 33%, minimum sulfur content 0.006%, and average DNA vaccine 20% is minimum
Oxygen content 0.00082%, pouring molten steel is normal after line feeding, and slab quality is good, shows solid calcium metal cored wire of the present invention also
Inclusion modification can be promoted, molten steel is purified and improved pouring molten steel performance, and can be eliminated in tundish and casting process
Nozzle clogging phenomenon.And there was only a small amount of splash and Calcium treatment flue dust during line feeding, disclosure satisfy that current steel mill
The advantage of environmentally friendly steel-making requirements.
Claims (3)
1. a kind of solid calcium metal, ferrosilicon, high titanium titanium silicon nitride alloyed powder composite core-spun yarn, it is characterised in that the core-spun yarn includes
Sandwich layer and the sheetmetal layer being wrapped in outside the sandwich layer, are provided with mesh-supported layer made by steel or ferrum between sandwich layer and sheetmetal layer,
The sandwich layer includes ferrosilicon titanium silicon nitride alloyed powder last layer, intermediate protective layer and real core metal calcium line, and real core metal calcium line is by
Between protective layer parcel, ferrosilicon titanium silicon nitride alloyed powder last layer parcel intermediate protective layer, described ferrosilicon titanium silicon nitride alloy powder
Layer is silicon iron powder and high titanium titanium silicon nitride alloy powder that particle diameter is below 3mm, and real core metal calcium line is nitrogenized with ferrosilicon, high titanium
The mass ratio of titanium silicon powder is 1:1~2：2~5；Described high titanium titanium silicon nitride alloy powder is by mass percentage by following
Elemental constituent constitute：
Al 1.0~2.5%
N 5~15%
Mn 2.5~5.0%
Mg 1.0~2.5%
Ti 40~60%
P ≤0.1%
S ≤0.1%
Si 35~50%；
Fe surpluses.
2. a kind of solid calcium metal according to claim 1, ferrosilicon, high titanium titanium silicon nitride alloyed powder composite core-spun yarn, its
It is characterised by that high titanium titanium silicon nitride alloy powder is made up of by mass percentage elements below component：
Al 1.5~2.0%
N 8~12%
Mn 3.0~4.0%
Mg 1.5~2.0%
Ti 45~55%
P ≤0.1%
S ≤0.1%
Si 40~45%；
Fe surpluses.
3. a kind of solid calcium metal according to claim 1 and 2, ferrosilicon, high titanium titanium silicon nitride alloyed powder composite core-spun yarn,
It is characterized in that the granularity of high titanium titanium silicon nitride alloy powder is 0.1 ~ 2.0mm.
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| CN201611017054.4A CN106676232A (en) | 2016-11-19 | 2016-11-19 | Solid calcium metal, ferrosilicon and high-titanium titanium silicon nitride alloy powder composite core-spun yarn |
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| CN201611017054.4A CN106676232A (en) | 2016-11-19 | 2016-11-19 | Solid calcium metal, ferrosilicon and high-titanium titanium silicon nitride alloy powder composite core-spun yarn |
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Application publication date: 20170517 |