CN106399631A - Composite cored wire comprising solid calcium metal and high-magnesium alloy containing multiple elements - Google Patents
Composite cored wire comprising solid calcium metal and high-magnesium alloy containing multiple elements Download PDFInfo
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- CN106399631A CN106399631A CN201611017069.0A CN201611017069A CN106399631A CN 106399631 A CN106399631 A CN 106399631A CN 201611017069 A CN201611017069 A CN 201611017069A CN 106399631 A CN106399631 A CN 106399631A
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- 239000011575 calcium Substances 0.000 title claims abstract description 73
- 229910052791 calcium Inorganic materials 0.000 title claims abstract description 62
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 title claims abstract description 59
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 46
- 239000002184 metal Substances 0.000 title claims abstract description 46
- 229910000861 Mg alloy Inorganic materials 0.000 title claims abstract description 26
- 239000007787 solid Substances 0.000 title claims abstract description 17
- 239000002131 composite material Substances 0.000 title claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 86
- 239000010959 steel Substances 0.000 claims abstract description 86
- 239000000843 powder Substances 0.000 claims abstract description 52
- 239000011777 magnesium Substances 0.000 claims abstract description 34
- 239000010410 layer Substances 0.000 claims abstract description 23
- 239000011241 protective layer Substances 0.000 claims abstract description 19
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 42
- 150000001875 compounds Chemical group 0.000 claims description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract description 25
- 229910052749 magnesium Inorganic materials 0.000 abstract description 24
- 238000000034 method Methods 0.000 abstract description 13
- 230000008901 benefit Effects 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 6
- 229910045601 alloy Inorganic materials 0.000 abstract description 5
- 239000000956 alloy Substances 0.000 abstract description 5
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 229910000742 Microalloyed steel Inorganic materials 0.000 abstract description 2
- 239000012792 core layer Substances 0.000 abstract 1
- 238000011084 recovery Methods 0.000 description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 8
- 239000010955 niobium Substances 0.000 description 8
- 229910052760 oxygen Inorganic materials 0.000 description 8
- 239000001301 oxygen Substances 0.000 description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 7
- 229910052593 corundum Inorganic materials 0.000 description 7
- 238000006477 desulfuration reaction Methods 0.000 description 7
- 230000023556 desulfurization Effects 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- 229910052717 sulfur Inorganic materials 0.000 description 7
- 239000011593 sulfur Substances 0.000 description 7
- 229910001845 yogo sapphire Inorganic materials 0.000 description 7
- 239000011572 manganese Substances 0.000 description 6
- 150000002910 rare earth metals Chemical class 0.000 description 6
- 239000010936 titanium Substances 0.000 description 6
- 239000010813 municipal solid waste Substances 0.000 description 5
- 230000004044 response Effects 0.000 description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 108010041986 DNA Vaccines Proteins 0.000 description 3
- 229940021995 DNA vaccine Drugs 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 229910052758 niobium Inorganic materials 0.000 description 3
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 238000009628 steelmaking Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910004709 CaSi Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- OSMSIOKMMFKNIL-UHFFFAOYSA-N calcium;silicon Chemical compound [Ca]=[Si] OSMSIOKMMFKNIL-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000007850 degeneration Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000002309 gasification 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
- 230000009931 harmful effect Effects 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 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
- C22C23/00—Alloys based on magnesium
-
- 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 powder cored wire, in particular to a composite cored wire comprising solid calcium metal and high-magnesium alloy containing multiple elements. The outer layer of the cored wire is a common steel belt with the thickness of 0.3-0.5 mm. A core layer comprises a rare earth-magnesium alloy powder layer, an intermediate protective layer and a solid calcium metal wire. The solid calcium metal wire is wrapped by the intermediate protective layer, and the intermediate protective layer is wrapped by the rare earth-magnesium alloy powder layer. The mass ratio of the solid calcium metal wire to the rare earth-magnesium alloy powder layer is 1:2-5. The rare earth-magnesium alloy powder layer comprises high-magnesium alloy powder containing the multiple elements, and the granularity of the rare earth-magnesium alloy powder containing the multiple elements is smaller than 3 mm. By means of the way that the cored wire is added into microalloyed steel, the calcium and magnesium treating process is stable, the high absorption rate is obtained, and existing problems are well solved. In addition, the composite cored wire has the advantages that storage time is longer and the yield is more stable, and has remarkable economic benefits.
Description
Technical field
The present invention relates to a kind of alloyed powder core-spun yarn.
Background technology
China's steel industry is in summit period in history, it is contemplated that China's year output of steel is up in the coming years
1800000000 tons, core-spun yarn market is up to more than 5,000,000,000 yuan.Counted according to IISI, the steel of countries in the world in 2011 always produces
Amount reaches 1,600,000,000 tons, amplification 15%;And China continues to hold a post or title the first in the world with 700,000,000 tons of yield, in addition, with scientific and technical continuous
Progressive, various Structural Designs increasingly tend to high parameter, lightweight and maximization, to the desired strength of ferrous materials performance more
High, toughness is more excellent, and core-spun yarn wire feeding process technology plays indispensable very important effect to this.
Obtain more high cleanliness, the product of more high uniformity is the focus that current iron and steel produces and studies, and is also metallurgical skill
The developing direction of art.With regard to current production specifications, the control of impurity content in steel has reached higher level (in steel
Total impurities:S+P+N+H+T O≤100 × 10-6), and the reduction further with impurity content in molten steel, press from both sides in steel
The harmful effect effect that debris produce to steel products just becomes apparent from, and therefore, the different quality according to product requires to control
Just it is particularly important with the character improving steel inclusion.
The most typical, inclusions class technology that is being most widely used is the Calcium treatment of Al deoxidization steel.Calcium treatment can
So that Al2O3 in steel is mingled with the composite oxides being transformed into low melting point, is conducive to its polymerization to grow up and excludes from molten steel, not only
Can freeze anti-waterstop port, and the quantity that in steel, oxide is mingled with can be reduced;Meanwhile, it is trapped in its shape of field trash in steel
Shape is almost circular and is irregularly distributed in steel, can mitigate the harm to Steel Properties.But the problem that Calcium treatment exists
It is:Although the quantity that in steel, oxide is mingled with can be greatly reduced, often size ratio is larger for the field trash that left behind, by
It is unlikely to deform in CaO Al2O3 field trash, in the operation of rolling, micro-crack, cavity can be formed along deformation direction around field trash,
Lead to a series of deterioration of performances of steel.Particularly those have the steel grade of rigors for fatigue behaviour, aborning then not
Permission adopts Calcium treatment.The pure product made from steel requiring for higher quality, finds new inclusion modification means, to mitigate and to disappear
Except the harm caused by aluminium deoxidation steel inclusion, have become as a problem in the urgent need to address during steel products produce.
At a temperature of steel-making, magnesium not only has a fabulous affinity with oxygen and sulfur, but also have extremely strong to field trash shape
State and the control ability of size.For Al deoxidization steel, magnesium processes while reducing the dissolved oxygen in steel further, can be by steel
In Al2O3 be mingled with and be changed into dystectic MgO Al2O3, because it is existed with solid-state in molten steel, there is no the mistake that polymerization is grown up
Journey, therefore, the size that its oxide is mingled with can be very tiny, and Dispersed precipitate is in steel.Research shows MgO present in steel
Al2O3 is mingled with size and can control within 5 μm, and the mechanical property of steel is had no adverse effect substantially.Equally, add magnesium in steel to exist
While reducing sulfur content further, sulfide in steel is made presented in tiny MgS or MgS-MnS, to mitigate because of MnS folder
The miscellaneous impact that Steel Properties are brought.
Although adopting the advantage that magnesium is processed very prominent on molten steel, due to magnesium elements own characteristic(Low melting point, 650
℃;Low boiling, 1080 DEG C;High vapour pressure, is more than 2.0Mpa during 1600 DEG C of temperature of steel-making), there is no effective magnesium addition side
Before method, in steelmaking process, molten steel is carried out with magnesium process and also there is very big difficulty.
Calcium treatment is the required technique of special steel smelting at present, 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 concise skill outside the stove of the metallurgical effects such as nonmetal inclusion degeneration
Art.Because the fusing point of calcium metal is low(838℃), boiling point is also low(1450℃), dissolubility very little in molten steel(When 1600 DEG C,
Calcium vapour pressure is for being 0.03% during 0.186MPa), the density also very little of calcium(1.55g/cm3), add in molten steel and easily float to steel
React and scaling loss is fallen with the oxide in the oxygen of in the air and slag liquid on slag surface.Therefore generally use core-spun yarn containing calcium metal such as
CaSi core-spun yarn(Ca28%~32%)Or cafe core-spun yarn(Ca about 30%, Fe about 70%), and molten metal to be added to when processing as far as possible
Deep, using the static pressure of molten metal, make calcium before becoming calcium bubble i.e. with steel in oxygen, sulfur etc. react, 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% about, substantial amounts of metal
Calcium all unnecessary waste.Find through substantial amounts of research, by powder(Silicon calcium powder or calcium metal, iron powder)The core-spun yarn of composition enters
After ladle, softened in the presence of high temperature, even if higher wire-feeding velocity, core-spun yarn also cannot penetrate high-temperature molten steel and enter
Deep, to slag surface, scaling loss is fallen it is easy to form calcium bubble floating to be mostly located at the top of molten steel.
Content of the invention
It is an object of the invention to provide the composite core-spun yarn of a kind of solid calcium metal and the high magnesium alloy containing multiple element,
Calcium, magnesium processing procedure can be made steadily and to obtain higher absorption by being added in micro alloyed steel using the method for core-spun yarn
Rate, makes current problems faced preferably be solved.And, the holding time is longer, the more stable advantage of recovery rate, have aobvious
The economic benefit writing.
In order to realize above-mentioned purpose, present invention employs following technical scheme:
A kind of solid calcium metal and the composite core-spun yarn of the high magnesium alloy containing multiple element, this core-spun yarn outer layer is 0.3-0.5
Millimeters thick ordinary steel belts, sandwich layer includes magnesium-rare earth powder bed, intermediate protective layer and real core metal calcium line, real core metal calcium line
Wrapped up by intermediate protective layer, magnesium-rare earth powder bed wraps up intermediate protective layer, real core metal calcium line and magnesium-rare earth powder
The mass ratio of layer is 1:2 ~ 5, magnesium-rare earth powder bed is the high magnesium alloy powder containing multiple element, the rare earth containing multiple element
The granularity of magnesium alloy powder is less than 3mm, contains the magnesium-rare earth powder of multiple element by mass percentage by elements below group
Divide and constitute:
Mg 40 ~ 50%,
Ca 0.5 ~ 2.5%,
Al 1.0 ~ 2.5%,
Si 25 ~ 35%,
Ti 1 ~ 2.5%,
Ba 0.5 ~ 3.5%,
Mn 2.5 ~ 5.0%,
Nb 0.5 ~ 1.0%,
V 0.5 ~ 1.0%,
Rare earth element 1.0 ~ 5.0%,
P≤0.1%,
S ≤0.1%;
Fe surplus.
Preferably, the magnesium-rare earth powder containing multiple element is made up of elements below component by mass percentage:
Mg 42 ~ 45%,
Ca 1.0 ~ 2.0%,
Al 1.5 ~ 2.0%,
Si 28 ~ 32%,
Ti 1.5 ~ 2.0%,
Ba 1.0 ~ 3.0%,
Mn 3.0 ~ 4.0%,
Nb 0.5 ~ 1.0%,
V 0.5 ~ 1.0%,
Rare earth element 1.0 ~ 5.0%,
P≤0.1%,
S ≤0.1%;
Fe surplus.
Preferably, the granularity of the magnesium-rare earth powder containing multiple element is 0.1 ~ 2.0mm.
The present invention add aluminum can crystal grain thinning, improve impact flexibility.Aluminum also has non-oxidizability and a corrosion resistance, aluminum with
Chromium, silicon share, and are remarkably improved the high temperature non-scale performance of steel and the ability of high-temperature corrosion resistance.Manganese is added not only to have enough tough
Property, and have higher intensity and hardness, improve the quenching property of steel, improve the hot-working character of steel.Titanium is added to make the interior tissue of steel
Densification, crystal grain thinning power;Reduce aging sensitivity and cold brittleness.The vanadium Jia 0.5% in steel can thinning microstructure crystal grain, improve intensity
And toughness.The carbide that vanadium is formed with carbon, can improve hydrogen attack resistance at high temperature under high pressure.Niobium energy crystal grain thinning and reduction steel
Superheated susceptivity and temper brittleness, improve intensity, but plasticity and toughness have declined.Add niobium in ordinary low-alloy steel, can
Improve resistant to hydrogen, nitrogen, ammonia corrosion ability under weather-resistant and high temperature.Niobium can improving welding property.
Ba is active element, it is possible to decrease inclusion content in melting steel content, increased the flowing of molten steel, makes molten steel more uniform.
Compound use Ca, Ba deoxidation, its product can form polynary mutual solution, reduces activity and the fusing point of deoxidation productss.Ba can play
Promote the effect of Ca, be conducive to deoxidation to carry out, make molten steel purifying effect more preferably, be conducive to steel inclusion to assemble and float.Compound
Using Ca, Ba deoxidation, product is the composite oxides of low melting point, is conducive to steel inclusion to assemble and floats.And can drop
The activity of low deoxidation productss and fusing point, are conducive to deoxidation to carry out, and make molten steel purifying effect more preferable.
The present invention is applied to core-spun yarn.Outer layer is 0.3-0.5 millimeters thick ordinary steel belts, and center portion is high magnesium magnesium-rare earth powder
End end, the marginal powder layer being to have heat insulating function.Magnesium core spun yarn using said structure can be by adjusting
The thickness of whole powder layer and physical property, to adjust its heat-conducting effect, thus adjusting the temperature of magnesium heart yearn during wire feeding process, prevent
It melts vaporization in advance, to reach the purpose that magnesium is sent into molten steel desired depth, thus can make magnesium processing procedure steadily simultaneously
Obtain higher absorption rate, so that current problems faced is preferably solved.Processed using rare earth magnesium core spun yarn, plus magnesium process
Using ordinary construction core-spun yarn containing magnesium steadily, magnesium can effectively add in molten steel ratio, and obtains more stable recovery rate.
After magnesium is processed, steel inclusion type, form and size significant change.Large-sized Al2O3 be mingled be changed into tiny
MgO Al2O3, makes MnS in steel be mingled with presented in tiny MgS or MgS-MnS simultaneously.By using rare earth magnesium cored
The method of line adding magnesium can not only solve the problems, such as that the response rate is low, but also solve plus magnesium during the big rolling of molten steel ask
Topic, exploitation rare earth magnesium core-spun yarn application, there is significant economic benefit.
Using intermediate protective layer(Box hat), the special construction of nexine reality core metal calcium line is 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, is made calcium metal be reacted with oxygen, sulfur etc. in steel before becoming bubble, greatly improves calcium metal recovery rate;In addition gold
Belong to calcium specific surface area be substantially reduced, therefore reduce 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 stablize.
Specific embodiment
Embodiment 1
A kind of solid calcium metal and the composite core-spun yarn of the high magnesium alloy containing multiple element, this core-spun yarn outer layer is 0.3-0.5
Millimeters thick ordinary steel belts, sandwich layer includes magnesium-rare earth powder bed, intermediate protective layer and real core metal calcium line, real core metal calcium line
Wrapped up by intermediate protective layer, magnesium-rare earth powder bed wraps up intermediate protective layer, real core metal calcium line and magnesium-rare earth powder
The mass ratio of layer is 1:2, magnesium-rare earth powder bed is the high magnesium alloy powder containing multiple element, the rare earth magnesium containing multiple element
The granularity of alloy powder is less than 3mm, contains the magnesium-rare earth powder of multiple element by mass percentage by elements below component
Constitute:
Mg 40%,
Ca 2.0%,
Al 1.5%,
Si 25%,
Ti 2.0%,
Ba 3.0%,
Mn 4.0%,
Nb 1.0%,
V 0.5%,
Rare earth element 2.0%,
P≤0.1%,
S ≤0.1%;
Fe surplus.
This kind of core-spun yarn was inserted in molten steel with certain payingoff speed in the refine later stage, the response rate average 35% of Mg, fed
After line, the recovery rate of Ca is more stable, and average recovery rate is 30%, average desulfurization degree 26%, highest desulfurization degree 33%, low-sulfur
Content 0.006%, average DNA vaccine 20%, minimum oxygen content 0.00082%, after line feeding, pouring molten steel is normal, and slab quality is good
Good, show that solid calcium metal cored wire of the present invention can also promote inclusion modification, purify molten steel and improve pouring molten steel performance,
And the nozzle clogging phenomenon in tundish and casting process can be eliminated.
Embodiment 2
A kind of solid calcium metal and the composite core-spun yarn of the high magnesium alloy containing multiple element, this core-spun yarn outer layer is 0.3-0.5
Millimeters thick ordinary steel belts, sandwich layer includes magnesium-rare earth powder bed, intermediate protective layer and real core metal calcium line, real core metal calcium line
Wrapped up by intermediate protective layer, magnesium-rare earth powder bed wraps up intermediate protective layer, real core metal calcium line and magnesium-rare earth powder
The mass ratio of layer is 1:4, magnesium-rare earth powder bed is the high magnesium alloy powder containing multiple element, the rare earth magnesium containing multiple element
The granularity of alloy powder is less than 3mm, contains the magnesium-rare earth powder of multiple element by mass percentage by elements below component
Constitute:
Mg 45%,
Ca 2.5%,
Al 2.0%,
Si 30%,
Ti 25%,
Ba 2.0%,
Mn 3.0%,
Nb 1.0%,
V 0.5%,
Rare earth element 2.0%,
P≤0.1%,
S ≤0.1%;
Fe surplus.
This kind of core-spun yarn was inserted in molten steel with certain payingoff speed in the refine later stage, the response rate average 35% of Mg, fed
After line, the recovery rate of Ca is more stable, and average recovery rate is 30%, average desulfurization degree 26%, highest desulfurization degree 33%, low-sulfur
Content 0.006%, average DNA vaccine 20%, minimum oxygen content 0.00082%, after line feeding, pouring molten steel is normal, and slab quality is good
Good, show that solid calcium metal cored wire of the present invention can also promote inclusion modification, purify molten steel and improve pouring molten steel performance,
And the nozzle clogging phenomenon in tundish and casting process can be eliminated.
Embodiment 3
A kind of solid calcium metal and the composite core-spun yarn of the high magnesium alloy containing multiple element, this core-spun yarn outer layer is 0.3-0.5
Millimeters thick ordinary steel belts, sandwich layer includes magnesium-rare earth powder bed, intermediate protective layer and real core metal calcium line, real core metal calcium line
Wrapped up by intermediate protective layer, magnesium-rare earth powder bed wraps up intermediate protective layer, real core metal calcium line and magnesium-rare earth powder
The mass ratio of layer is 1:3, magnesium-rare earth powder bed is the high magnesium alloy powder containing multiple element, the rare earth magnesium containing multiple element
The granularity of alloy powder is less than 3mm, contains the magnesium-rare earth powder of multiple element by mass percentage by elements below component
Constitute:
Mg 48%,
Ca 1.5%,
Al 2.0%
Si 30%,
Ti 1.5%,
Ba 2.5%,
Mn 3.0%,
Nb 1.0%,
V 0.5%,
Rare earth element 2.0%,
P≤0.1%,
S ≤0.1%;
Fe surplus.
This kind of core-spun yarn was inserted in molten steel with certain payingoff speed in the refine later stage, the response rate average 35% of Mg, fed
After line, the recovery rate of Ca is more stable, and average recovery rate is 30%, average desulfurization degree 26%, highest desulfurization degree 33%, low-sulfur
Content 0.006%, average DNA vaccine 20%, minimum oxygen content 0.00082%, after line feeding, pouring molten steel is normal, and slab quality is good
Good, show that solid calcium metal cored wire of the present invention can also promote inclusion modification, purify molten steel and improve pouring molten steel performance,
And the nozzle clogging phenomenon in tundish and casting process can be eliminated.
Claims (3)
1. the composite core-spun yarn of a kind of solid calcium metal and the high magnesium alloy containing multiple element is it is characterised in that outside this core-spun yarn
Layer is 0.3-0.5 millimeters thick ordinary steel belts, and sandwich layer includes magnesium-rare earth powder bed, intermediate protective layer and real core metal calcium line,
Real core metal calcium line is wrapped up by intermediate protective layer, magnesium-rare earth powder bed wrap up intermediate protective layer, real core metal calcium line with dilute
The mass ratio of native magnesium alloy powder layer is 1:2 ~ 5, magnesium-rare earth powder bed is the high magnesium alloy powder containing multiple element, containing many
The granularity of the magnesium-rare earth powder of kind of element is less than 3mm, contain by mass percentage the magnesium-rare earth powder of multiple element by
Elements below component is constituted:
Mg 40 ~ 50%,
Ca 0.5 ~ 2.5%,
Al 1.0 ~ 2.5%,
Si 25 ~ 35%,
Ti 1 ~ 2.5%,
Ba 0.5 ~ 3.5%,
Mn 2.5 ~ 5.0%,
Nb 0.5 ~ 1.0%,
V 0.5 ~ 1.0%,
Rare earth element 1.0 ~ 5.0%,
P≤0.1%,
S ≤0.1%;
Fe surplus.
2. the composite core-spun yarn of a kind of solid calcium metal according to claim 1 and the high magnesium alloy containing multiple element,
It is characterized in that the high magnesium alloy powder containing multiple element is made up of elements below component by mass percentage:
Mg 42 ~ 45%,
Ca 1.0 ~ 2.0%,
Al 1.5 ~ 2.0%,
Si 28 ~ 32%,
Ti 1.5 ~ 2.0%,
Ba 1.0 ~ 3.0%,
Mn 3.0 ~ 4.0%,
Nb 0.5 ~ 1.0%,
V 0.5 ~ 1.0%,
Rare earth element 1.0 ~ 5.0%,
P≤0.1%,
S ≤0.1%;
Fe surplus.
3. the compound core-spun of a kind of solid calcium metal according to claim 1 and 2 and the high magnesium alloy containing multiple element
Line is it is characterised in that the granularity containing the high magnesium alloy powder of multiple element is 0.1 ~ 2.0mm.
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Citations (5)
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---|---|---|---|---|
JPS5340615A (en) * | 1976-09-27 | 1978-04-13 | Sumitomo Metal Ind Ltd | Steel nitriding agent |
CN1313408A (en) * | 2000-12-12 | 2001-09-19 | 北京正大银光科技有限公司 | Si-Mg alloy cored wine |
CN101875994A (en) * | 2010-03-31 | 2010-11-03 | 湖北猴王焊材有限公司 | Novel weathering resistant steel microalloying compound core-spun yarn |
CN102851446A (en) * | 2012-09-10 | 2013-01-02 | 上海盛宝冶金科技有限公司 | Multilayer-structured calcium-core wire, and manufacturing method and purpose thereof |
CN202744584U (en) * | 2012-04-10 | 2013-02-20 | 天津瀚隆冶金材料有限公司 | Novel anti-splashing pure metal calcium cored wire |
-
2016
- 2016-11-19 CN CN201611017069.0A patent/CN106399631A/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5340615A (en) * | 1976-09-27 | 1978-04-13 | Sumitomo Metal Ind Ltd | Steel nitriding agent |
CN1313408A (en) * | 2000-12-12 | 2001-09-19 | 北京正大银光科技有限公司 | Si-Mg alloy cored wine |
CN101875994A (en) * | 2010-03-31 | 2010-11-03 | 湖北猴王焊材有限公司 | Novel weathering resistant steel microalloying compound core-spun yarn |
CN202744584U (en) * | 2012-04-10 | 2013-02-20 | 天津瀚隆冶金材料有限公司 | Novel anti-splashing pure metal calcium cored wire |
CN102851446A (en) * | 2012-09-10 | 2013-01-02 | 上海盛宝冶金科技有限公司 | Multilayer-structured calcium-core wire, and manufacturing method and purpose thereof |
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