CN106521088A - Solid metal calcium and magnesium-rare earth alloy composite core-spun cable - Google Patents
Solid metal calcium and magnesium-rare earth alloy composite core-spun cable Download PDFInfo
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- CN106521088A CN106521088A CN201611017047.4A CN201611017047A CN106521088A CN 106521088 A CN106521088 A CN 106521088A CN 201611017047 A CN201611017047 A CN 201611017047A CN 106521088 A CN106521088 A CN 106521088A
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- 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
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- 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
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- 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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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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 discloses a solid metal calcium and magnesium-rare earth alloy composite core-spun cable. An outer layer of the core-spun cable is a 0.3-0.5-millimeter-thick ordinary steel belt; a core layer comprises a rare earth-magnesium alloy powder layer, a middle protection layer and a solid core metal calcium wire; the solid core metal calcium wire is wrapped by the middle protection layer; the middle protection layer is wrapped by the rare earth-magnesium alloy powder layer; the mass ratio of the solid core metal calcium wire to the rare earth-magnesium alloy powder layer is 1:(2-5); and the particle size of rare earth-magnesium alloy powder is smaller than 3 mm. The alloy powder is added into micro-alloyed steel by adopting a core-spun cable method, so that the treatment process of calcium and magnesium is stable, and high absorptivity is achieved; and current problems are well solved. Besides, storage time is longer; yield is more stable; and the solid metal calcium and magnesium-rare earth alloy composite core-spun cable 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, in the coming years, it is contemplated that China's year output of steel is up to
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 is always produced
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 science and technology it is 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 the focus that more high cleanliness, the product of more high uniformity are current iron and steel production and research, and 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 with the further reduction of impurity content in molten steel, press from both sides in steel
The harmful effect effect that debris are produced to steel products just becomes apparent from, therefore, required to control according to the different quality of product
Just it is particularly important with the character for 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 to be mingled with the composite oxides for being transformed into low melting point, be conducive to its polymerization to grow up from molten steel and exclude, not only
Can anti-waterstop port freeze, and the quantity that oxide in steel is mingled with can be reduced；Meanwhile, field trash its shape being trapped 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 is present
It is：Although the quantity that oxide is mingled with steel can be greatly reduced, the field trash that left behind often size than larger, by
It is unlikely to deform in CaO Al2O3 field trashes, in the operation of rolling, micro-crack, cavity can be formed along deformation direction around field trash,
Cause a series of deterioration of performances of steel.Those are particularly for fatigue behaviour has the steel grade of rigors, aborning then not
Permission adopts Calcium treatment.For the pure product made from steel that higher quality is required, new inclusion modification means are found, to mitigate and disappear
Except the harm caused by aluminium deoxidation steel inclusion, a problem in the urgent need to address in steel products production is had become.
At a temperature of steel-making, magnesium not only has fabulous affinity with oxygen and sulfur, but also with extremely strong to field trash shape
The control ability of state and size.For Al deoxidization steel, magnesium process, can be by steel while the dissolved oxygen in steel is further reduced
In Al2O3 be mingled with and be changed into dystectic MgO Al2O3, as which is present with solid-state in molten steel, the mistake for have polymerization to grow 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, to have no adverse effect substantially the mechanical property of steel.Equally, magnesium is added to exist in steel
While further reducing sulfur content, in making steel, sulfide in the form of tiny MgS or MgS-MnS is mitigated and is pressed from both sides because of MnS
The miscellaneous impact brought by Steel Properties.
Although being projected very much using the advantage that magnesium is processed to 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）, in no effective magnesium addition side
Before method, in steelmaking process, magnesium process is carried out to molten steel and also there is very big difficulty.
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）, in adding molten steel, 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 molten metal will be added to as far as possible when processing
Deep, using the static pressure of molten metal, make calcium before calcium bubble is become 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% 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
After ladle, softened in the presence of high temperature, even if higher wire-feeding velocity, core-spun yarn cannot also penetrate high-temperature molten steel entrance
Deep, is located at the top of molten steel, it is easy to which scaling loss is fallen to slag surface to form calcium bubble floating mostly.
The content of the invention
It is an object of the invention to provide a kind of solid calcium metal magnesium-rare earth alloy composite core-spun yarn, by using core-spun yarn
Method can be made calcium, magnesium processing procedure steadily and obtain higher absorption rate to be added in micro alloyed steel, make what is faced at present
Problem is preferably solved.Also, the holding time is longer, the more stable advantage of recovery rate, with significant economic benefit.
In order to realize above-mentioned purpose, following technical scheme is present invention employs：
A kind of solid calcium metal magnesium-rare earth alloy composite core-spun yarn, the core-spun yarn outer layer be 0.3-0.5 millimeters thick ordinary steel belts, core
Layer includes magnesium-rare earth powder bed, intermediate protective layer and real core metal calcium line, and real core metal calcium line is wrapped up by intermediate protective layer,
Magnesium-rare earth powder bed wraps up intermediate protective layer, and real core metal calcium line is 1 with the mass ratio of magnesium-rare earth powder bed:2 ~ 5,
The granularity of magnesium-rare earth powder is less than 3mm, and magnesium-rare earth powder is made up of elements below component by mass percentage：
Mg 9 ~ 15%,
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%,
Rare earth element 6.0 ~ 9.0%,
P≤0.1%,
S ≤0.1%；
Fe surpluses.
Preferably, magnesium-rare earth powder is made up of elements below component by mass percentage：
Mg 10 ~ 12%,
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%,
Rare earth element 7.0 ~ 8.0%,
P≤0.1%,
S ≤0.1%；
Fe surpluses.
Preferably, the granularity of the magnesium-rare earth powder 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 are shared, and are remarkably improved the high temperature non-scale performance and the ability of high-temperature corrosion resistance of steel.Manganese is added not only to have enough tough
Property, and have higher intensity and hardness, the quenching property of steel is improved, improves 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.
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, reduce activity and the fusing point of deoxidation productss.Ba can be played
Promote the effect of Ca, be conducive to deoxidation to carry out, make molten steel purifying effect more preferably, be conducive to steel inclusion aggregation to float.It is compound
Using Ca, Ba deoxidation, composite oxides of the product for low melting point, steel inclusion aggregation is conducive to float.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 magnesium-rare earth powder,
Marginal is the powder layer with heat insulating function.Can be by adjusting powder using the magnesium core spun yarn of said structure
The thickness of layer and physical property so as to adjust the temperature of magnesium heart yearn during wire feeding process, prevent which from shifting to an earlier date adjusting its heat-conducting effect
Fusing vaporization, with reach by magnesium send into molten steel desired depth purpose, can thus make magnesium processing procedure steadily and acquisition compared with
High-absorbility, makes current problems faced preferably be solved.Processed using rare earth magnesium core spun yarn, plus magnesium process ratio is adopted
Ordinary construction core-spun yarn containing magnesium is steady, during magnesium effectively can add molten steel, and obtains more stable recovery rate.Through magnesium
After process, steel inclusion type, form and size significant change.Large-sized Al2O3 is mingled with and is changed into tiny MgO
Al2O3, while make MnS in steel be mingled with the form of tiny MgS or MgS-MnS.By using rare earth magnesium core-spun yarn
Method adding magnesium solve the problems, such as that the response rate is low, but also solve the problems, such as plus magnesium during the big rolling of molten steel, open
Rare earth magnesium core-spun yarn application is sent out, with significant economic benefit.
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, is made calcium metal be reacted with oxygen, sulfur etc. in steel before bubble is become, 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 be stablized.
Specific embodiment
Embodiment 1
A kind of solid calcium metal magnesium-rare earth alloy composite core-spun yarn, the core-spun yarn outer layer be 0.3-0.5 millimeters thick ordinary steel belts, core
Layer includes magnesium-rare earth powder bed, intermediate protective layer and real core metal calcium line, and real core metal calcium line is wrapped up by intermediate protective layer,
Magnesium-rare earth powder bed wraps up intermediate protective layer, and real core metal calcium line is 1 with the mass ratio of magnesium-rare earth powder bed:3, it is dilute
The granularity of native magnesium alloy powder is less than 3mm, and magnesium-rare earth powder is made up of elements below component by mass percentage：
Mg 10%,
Ca 2.0%,
Al 1.5%,
Si 25%,
Ti 2.0%,
Ba 3.0%,
Mn 4.0%,
Rare earth element 7.0%,
P≤0.1%,
S ≤0.1%；
Fe surpluses.
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, was 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%, most 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
It is 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 magnesium-rare earth alloy composite core-spun yarn, the core-spun yarn outer layer be 0.3-0.5 millimeters thick ordinary steel belts, core
Layer includes magnesium-rare earth powder bed, intermediate protective layer and real core metal calcium line, and real core metal calcium line is wrapped up by intermediate protective layer,
Magnesium-rare earth powder bed wraps up intermediate protective layer, and real core metal calcium line is 1 with the mass ratio of magnesium-rare earth powder bed:4, it is dilute
The granularity of native magnesium alloy powder is less than 3mm, and magnesium-rare earth powder is made up of elements below component by mass percentage：
Mg 12%,
Ca 2.5%,
Al 2.0%,
Si 30%,
Ti 25%,
Ba 2.0%,
Mn 3.0%,
Rare earth element 8.0%,
P≤0.1%,
S ≤0.1%；
Fe surpluses.
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, was 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%, most 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
It is 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 magnesium-rare earth alloy composite core-spun yarn, the core-spun yarn outer layer be 0.3-0.5 millimeters thick ordinary steel belts, core
Layer includes magnesium-rare earth powder bed, intermediate protective layer and real core metal calcium line, and real core metal calcium line is wrapped up by intermediate protective layer,
Magnesium-rare earth powder bed wraps up intermediate protective layer, and real core metal calcium line is 1 with the mass ratio of magnesium-rare earth powder bed:3, it is dilute
The granularity of native magnesium alloy powder is less than 3mm, and magnesium-rare earth powder is made up of elements below component by mass percentage：
Mg 14%,
Ca 1.5%,
Al 2.0%
Si 30%,
Ti 1.5%,
Ba 2.5%,
Mn 3.0%,
Rare earth element 7.5%,
P≤0.1%,
S ≤0.1%；
Fe surpluses.
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, was 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%, most 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
It is 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. a kind of solid calcium metal magnesium-rare earth alloy composite core-spun yarn, it is characterised in that the core-spun yarn outer layer is 0.3-0.5 millimeters
Thick ordinary steel belts, sandwich layer include magnesium-rare earth powder bed, intermediate protective layer and real core metal calcium line, and real core metal calcium line is by
Between protective layer parcel, magnesium-rare earth powder bed parcel intermediate protective layer, real core metal calcium line and magnesium-rare earth powder bed
Mass ratio is 1:2 ~ 5, the granularity of magnesium-rare earth powder is less than 3mm, and magnesium-rare earth powder is by following by mass percentage
Elemental constituent is constituted：
Mg 9 ~ 15%,
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%,
Rare earth element 6.0 ~ 9.0%,
P≤0.1%,
S ≤0.1%；
Fe surpluses.
2. a kind of solid calcium metal magnesium-rare earth alloy composite core-spun yarn according to claim 1, it is characterised in that rare earth magnesium
Alloy powder is made up of elements below component by mass percentage：
Mg 10 ~ 12%,
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%,
Rare earth element 7.0 ~ 8.0%,
P≤0.1%,
S ≤0.1%；
Fe surpluses.
3. a kind of solid calcium metal magnesium-rare earth alloy composite core-spun yarn according to claim 1 and 2, it is characterised in that rare earth
The granularity of magnesium alloy powder is 0.1 ~ 2.0mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611017047.4A CN106521088A (en) | 2016-11-19 | 2016-11-19 | Solid metal calcium and magnesium-rare earth alloy composite core-spun cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611017047.4A CN106521088A (en) | 2016-11-19 | 2016-11-19 | Solid metal calcium and magnesium-rare earth alloy composite core-spun cable |
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Family
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|---|---|---|---|---|
| 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 |
| CN1580308A (en) * | 2003-08-05 | 2005-02-16 | 包头文鑫实业有限公司 | Process for manufacturing efficient high-magnesium alloy core-spun yarn |
| CN103789656A (en) * | 2014-01-24 | 2014-05-14 | 北京工业大学 | Tungsten-chromium-vanadium-containing high-manganese wear-resistant steel and preparation method thereof |
| CN203820835U (en) * | 2013-12-25 | 2014-09-10 | 辽宁东戴河新区佳联科技有限公司 | Composite cored wire |
| CN204097507U (en) * | 2014-09-10 | 2015-01-14 | 马鞍山市鑫海耐火材料有限责任公司 | The novel cored-wire of a kind of external refining |
| CN204174226U (en) * | 2012-09-10 | 2015-02-25 | 上海盛宝冶金科技有限公司 | A kind of calcium heart yearn of multilayered structure |
| CN106086302A (en) * | 2016-07-28 | 2016-11-09 | 上海大学 | Magnesium calcium rare earth alloy core-spun yarn of Ferrous Metallurgy and preparation method thereof |
-
2016
- 2016-11-19 CN CN201611017047.4A patent/CN106521088A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN1580308A (en) * | 2003-08-05 | 2005-02-16 | 包头文鑫实业有限公司 | Process for manufacturing efficient high-magnesium alloy core-spun yarn |
| CN204174226U (en) * | 2012-09-10 | 2015-02-25 | 上海盛宝冶金科技有限公司 | A kind of calcium heart yearn of multilayered structure |
| CN203820835U (en) * | 2013-12-25 | 2014-09-10 | 辽宁东戴河新区佳联科技有限公司 | Composite cored wire |
| CN103789656A (en) * | 2014-01-24 | 2014-05-14 | 北京工业大学 | Tungsten-chromium-vanadium-containing high-manganese wear-resistant steel and preparation method thereof |
| CN204097507U (en) * | 2014-09-10 | 2015-01-14 | 马鞍山市鑫海耐火材料有限责任公司 | The novel cored-wire of a kind of external refining |
| CN106086302A (en) * | 2016-07-28 | 2016-11-09 | 上海大学 | Magnesium calcium rare earth alloy core-spun yarn of Ferrous Metallurgy and preparation method thereof |
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