CN106636546A - Core spun yarn titanium-silicon nitride alloy powder containing rare earth, calcium, barium and molybdenum - Google Patents
Core spun yarn titanium-silicon nitride alloy powder containing rare earth, calcium, barium and molybdenum Download PDFInfo
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- CN106636546A CN106636546A CN201611016247.8A CN201611016247A CN106636546A CN 106636546 A CN106636546 A CN 106636546A CN 201611016247 A CN201611016247 A CN 201611016247A CN 106636546 A CN106636546 A CN 106636546A
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- 239000011575 calcium Substances 0.000 title claims abstract description 29
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 28
- 239000000843 powder Substances 0.000 title claims abstract description 27
- 229910052581 Si3N4 Inorganic materials 0.000 title claims abstract description 22
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 20
- 239000000956 alloy Substances 0.000 title claims abstract description 20
- 229910052791 calcium Inorganic materials 0.000 title claims abstract description 20
- 229910052788 barium Inorganic materials 0.000 title claims abstract description 19
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 19
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 title claims abstract description 17
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 title claims abstract description 17
- UGACIEPFGXRWCH-UHFFFAOYSA-N [Si].[Ti] Chemical compound [Si].[Ti] UGACIEPFGXRWCH-UHFFFAOYSA-N 0.000 title abstract description 10
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 title abstract description 4
- 229910052750 molybdenum Inorganic materials 0.000 title abstract description 4
- 239000011733 molybdenum Substances 0.000 title abstract description 4
- 239000010936 titanium Substances 0.000 claims description 30
- RSNKHMHUYALIHE-UHFFFAOYSA-N [Mo].[Si].[Ti] Chemical compound [Mo].[Si].[Ti] RSNKHMHUYALIHE-UHFFFAOYSA-N 0.000 claims description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 29
- 238000000034 method Methods 0.000 abstract description 12
- 238000011084 recovery Methods 0.000 abstract description 8
- 229910000742 Microalloyed steel Inorganic materials 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 5
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 abstract description 2
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 abstract 1
- 239000011572 manganese Substances 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 56
- 239000010959 steel Substances 0.000 description 56
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 24
- 229910052757 nitrogen Inorganic materials 0.000 description 14
- 239000002245 particle Substances 0.000 description 12
- 229910052742 iron Inorganic materials 0.000 description 11
- 229910052719 titanium Inorganic materials 0.000 description 11
- 239000013078 crystal Substances 0.000 description 10
- 238000005266 casting Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- 229910000859 α-Fe Inorganic materials 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 7
- 229910001566 austenite Inorganic materials 0.000 description 7
- 238000001556 precipitation Methods 0.000 description 7
- 230000004044 response Effects 0.000 description 6
- 238000005275 alloying Methods 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 241001417490 Sillaginidae Species 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000001953 recrystallisation Methods 0.000 description 3
- 238000009628 steelmaking 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
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 230000001976 improved effect Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 229910000616 Ferromanganese Inorganic materials 0.000 description 1
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- 229910001200 Ferrotitanium Inorganic materials 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- WKORWMLYJIMJKA-UHFFFAOYSA-N [Si][Ti][Ti] Chemical compound [Si][Ti][Ti] WKORWMLYJIMJKA-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- -1 alterant Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 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
- 229910052747 lanthanoid Inorganic materials 0.000 description 1
- 150000002602 lanthanoids Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 150000002739 metals Chemical class 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
- 239000010813 municipal solid waste Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- 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
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/16—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on nitrides
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- 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 core spun yarn alloy powder, in particular to a core spun yarn titanium-silicon nitride alloy powder containing rare earth, calcium, barium and molybdenum. The alloy powder includes, by mass percent, 1.0%-2.5% of Al, 10%-25% of N, 2.5%-5.0% of Mn, 1.0%-2.5% of Mg, 25%-40% of Ti, 25%-35% of Si, 5%-10% of Ca, 0.5%-1.0% of Mo, 0.5%-1.0% of Ba, 1.0%-2.0% of rare earth elements, smaller than or equal to 0.1% of P, smaller than or equal to 0.1% of S and the balance Fe. The alloy powder is added into microalloyed steel in a core spun yarn method, the problem of the lower recovery rate can be solved, in addition, the use amount of silicon iron and manganese iron can be reduced, application of titanium-silicon nitride and the core spun yarn alloy of the titanium-silicon nitride is developed, and obvious economic benefits are achieved.
Description
Technical field
The present invention relates to a kind of core-spun yarn alloyed powder.
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.
It is composite core-spun yarn new in screw-thread steel wire production containing rare earth, calcium, barium, molybdenum titanium silicon nitride core-spun yarn.In essence
Add from the refining later stage, the recovery rate of nitrogen in steel titanium can be improved, other ferroalloy consumptions are reduced, with significant economic benefit.By
Kick the beam in rare earth, calcium, barium, molybdenum titanium silicon nitride alloy proportion is contained（Containing iron content ratio in rare earth, calcium, barium, molybdenum titanium silicon nitride alloy
Ferro-titanium is low by more than 30%）, in adition process, swim in molten steel surface and combined with slag and be oxidized, cause receiving for titanium
Rate is relatively low（Average out to 27%）, Ti content 0.0038% in steel do not reach internal quality control requirement.And contain rare earth, calcium, barium, molybdenum nitridation
Titanium silicon is fed in steel at Argon station by the form of core-spun yarn, on the one hand can be that alloy rapidly enters molten steel, it is to avoid closed
Gold is aoxidized in molten steel by slag；It is on the other hand, low through the molten steel oxidation of furnace rear deoxidation treatment, it is possible to reduce the scaling loss of titanium,
So as to improve and stablize the response rate of the titanium in steel.
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 core-spun yarn contains rare earth, calcium, barium, molybdenum titanium silicon nitride alloyed powder, the alloyed powder leads to
Cross using the method for core-spun yarn to be added to micro alloyed steel in can not only solve the problems, such as that the response rate is low, and can also save
The usage amount of ferrosilicon, ferromanganese, exploitation contains rare earth, calcium, barium, molybdenum titanium silicon nitride and its core-spun yarn Alloyapplication, with significant Jing
Ji benefit.
In order to realize above-mentioned purpose, following technical scheme is present invention employs：
A kind of core-spun yarn contains rare earth, calcium, barium, molybdenum titanium silicon nitride alloyed powder, and the alloy powder is by mass percentage by following unit
Plain component is constituted：
Al 1.0 ~ 2.5%,
N 10 ~ 25%,
Mn 2.5 ~ 5.0%,
Mg 1.0 ~ 2.5%,
Ti 25 ~ 40%,
Si 25 ~ 35%,
Ca 5 ~ 10%,
Mo 0.5 ~ 1.0%,
Ba 0.5 ~ 1.0%,
Rare earth element 1.0 ~ 2.0%,
P≤0.1%,
S ≤0.1%；
Fe surpluses.
Preferably, the alloy powder is made up of by mass percentage elements below component：
Al 1.5 ~ 2.0%,
N 15 ~ 20%,
Mn 3.0 ~ 4.0%,
Mg 1.5 ~ 2.0%,
Ti 30 ~ 35%,
Si 30 ~ 35%,
Ca 5 ~ 10%,
Mo 0.5 ~ 1.0%,
Ba 0.5 ~ 1.0%,
Rare earth element 1.0 ~ 2.0%,
P ≤0.1%
S ≤0.1%；
Fe surpluses.
Preferably, the granularity of the alloy powder is 0.1 ~ 2.0mm.
The present invention chooses each component raw material and smelts in a vacuum furnace.Under certain process conditions, nitrogenized, made nitridation
Reach optimum efficiency（Regulation content）, then pour into ingot casting.The broken essence of ingot casting Jing is overmolding to diameter into certain particle size using iron sheet
For 13 millimeters of core-spun yarn.This kind of core-spun yarn is inserted in molten steel in the refine later stage with certain payingoff speed, and Ti contains in final steel
Amount averagely reaches the recovery rate average 60% of average 55%, the Si of the response rate of 0.008%, Ti.
Using the present invention containing rare earth, calcium, barium, the high titanium titanium silicon nitride alloyed powder of molybdenum core-spun yarn be iron and steel production in it is new
Composite core-spun yarn, adds from the refine later stage, can improve the recovery rate of nitrogen in steel titanium silicon, reduces other ferroalloy consumptions, has
Significant economic benefit.Its reason is that Ti and carbon or nitrogen in steel form size for nano level compound, and they are to crystal grain
Grow up strong inhibition, and the volume fraction shared by this nano level compound is when being 2%, the refinement to organizing
Effect is best.Ca improves the clarity of the form of field trash and distribution cleaning molten steel, improves the quality of steel, can improve molten steel
The quality of mobile performance and steel.Ba is active element, it is possible to decrease inclusion content in melting steel content, increased the flowing of molten steel, makes steel
Water is more uniform.Compound use Ca, Ba deoxidation, its product can form polynary mutual solution, reduce the activity and fusing point of deoxidation productss.
Ba can play a part of to promote Ca, be conducive to deoxidation to carry out, and make molten steel purifying effect more preferably, be conducive to steel inclusion to assemble
Float.Compound use Ca, Ba deoxidation, product is the composite oxides of low melting point, is conducive to steel inclusion aggregation to float.
And the activity and fusing point of deoxidation productss can be reduced, is conducive to deoxidation to carry out, make molten steel purifying effect more preferable.Rare earth element is referred to
Period of element atom ordinal number is 15 lanthanide series of 57-71.These elements are all metals, but their oxide much like
" soil ", so traditionally claiming rare earth.Rare earth is added in steel, thus it is possible to vary the composition of steel inclusion, form, distribution and property,
So as to improve the various performances of steel, such as toughness, weldability, cold-forming property.
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 core-spun yarn contains rare earth, calcium, barium, molybdenum titanium silicon nitride alloyed powder, and the alloy powder is by mass percentage by following unit
Plain component is constituted：
Al 2.0%,
N 20%,
Mn 4.0%,
Mg 2.0%,
Ti 30%,
Si 35%,
Ca 5%,
Mo 1.0%,
Ba 1.0%,
Rare earth element 1.0%,
P≤0.1%,
S ≤0.1%；
Fe surpluses.
The present invention chooses each raw material and smelts in a vacuum furnace.Under certain process conditions, nitrogenized, reach nitridation
Optimum efficiency（Regulation content）, then pour into ingot casting.The broken essence of ingot casting Jing is overmolding to a diameter of 13 into certain particle size using iron sheet
The core-spun yarn of millimeter.This kind of core-spun yarn is inserted in molten steel in the refine later stage with certain payingoff speed, and Ti contents are put down in final steel
Reach the recovery rate average 60% of average 55%, the Si of the response rate of 0.008%, Ti.
Embodiment 2
A kind of core-spun yarn contains rare earth, calcium, barium, molybdenum titanium silicon nitride alloyed powder, and the alloy powder is by mass percentage by following unit
Plain component is constituted：
Al 1.0%,
N 15%,
Mn 4.0%,
Mg 1.0%,
Ti 25%,
Si 25%,
Ca 5%,
Mo 1.0%,
Ba 1.0%,
Rare earth element 1.0%,
P≤0.1%,
S ≤0.1%；
Fe surpluses.
The present invention chooses each raw material and smelts in a vacuum furnace.Under certain process conditions, nitrogenized, reach nitridation
Optimum efficiency（Regulation content）, then pour into ingot casting.The broken essence of ingot casting Jing is overmolding to a diameter of 13 into certain particle size using iron sheet
The core-spun yarn of millimeter.This kind of core-spun yarn is inserted in molten steel in the refine later stage with certain payingoff speed, and Ti contents are put down in final steel
Reach the recovery rate average 60% of average 55%, the Si of the response rate of 0.008%, Ti.
Embodiment 3
A kind of core-spun yarn contains rare earth, calcium, barium, molybdenum titanium silicon nitride alloyed powder, and the alloy powder is by mass percentage by following unit
Plain component is constituted：
Al 2.5%,
N 25%,
Mn 2.5%,
Mg 2.0%,
Ti 30%,
Si 28%,
Ca 10%,
Mo 1.0%,
Ba 1.0%,
Rare earth element 1.0%,
P≤0.1%,
S ≤0.1%；
Fe surpluses.
The present invention chooses each raw material and smelts in a vacuum furnace.Under certain process conditions, nitrogenized, reach nitridation
Optimum efficiency（Regulation content）, then pour into ingot casting.The broken essence of ingot casting Jing is overmolding to a diameter of 13 into certain particle size using iron sheet
The core-spun yarn of millimeter.This kind of core-spun yarn is inserted in molten steel in the refine later stage with certain payingoff speed, and Ti contents are put down in final steel
Reach the recovery rate average 60% of average 55%, the Si of the response rate of 0.008%, Ti.
Claims (3)
1. a kind of core-spun yarn contains rare earth, calcium, barium, molybdenum titanium silicon nitride alloyed powder, it is characterised in that the alloy powder presses quality percentage
Than being made up of elements below component：
Al 1.0 ~ 2.5%,
N 10 ~ 25%,
Mn 2.5 ~ 5.0%,
Mg 1.0 ~ 2.5%,
Ti 25 ~ 40%,
Si 25 ~ 35%,
Ca 5 ~ 10%,
Mo 0.5 ~ 1.0%,
Ba 0.5 ~ 1.0%,
Rare earth element 1.0 ~ 2.0%,
P≤0.1%,
S ≤0.1%；
Fe surpluses.
2. a kind of core-spun yarn according to claim 1 contains rare earth, calcium, barium, molybdenum titanium silicon nitride alloyed powder, it is characterised in that should
Alloy powder is made up of by mass percentage elements below component：
Al 1.5 ~ 2.0%,
N 15 ~ 20%,
Mn 3.0 ~ 4.0%,
Mg 1.5 ~ 2.0%,
Ti 30 ~ 35%,
Si 30 ~ 35%,
Ca 5 ~ 10%,
Mo 0.5 ~ 1.0%,
Ba 0.5 ~ 1.0%,
Rare earth element 1.0 ~ 2.0%,
P ≤0.1%
S ≤0.1%；
Fe surpluses.
3. a kind of core-spun yarn according to claim 1 and 2 contains rare earth, calcium, barium, molybdenum titanium silicon nitride alloyed powder, and its feature exists
In the alloy powder granularity be 0.1 ~ 2.0mm.
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