CN102653808A - Seamless aluminum-containing core-spun yarn - Google Patents
Seamless aluminum-containing core-spun yarn Download PDFInfo
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- CN102653808A CN102653808A CN201210138111XA CN201210138111A CN102653808A CN 102653808 A CN102653808 A CN 102653808A CN 201210138111X A CN201210138111X A CN 201210138111XA CN 201210138111 A CN201210138111 A CN 201210138111A CN 102653808 A CN102653808 A CN 102653808A
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Abstract
The invention belongs to a refining technique outside a steelmaking furnace, and particularly relates to a seamless aluminum-containing core-spun yarn for molten steel disoxidation calcium treatment. The core-spun yarn is composed of an outer cladding and an inner core, wherein the outer cladding is coated on the external surface of the inner core; the outer cladding is composed of a steel belt which is 0.3-0.8mm thick; and the inner core is prepared from one or both of aluminum and calcium. The thickness of the outer cladding steel belt can be adjusted according to the size of the ladle, so that the calcium metal can be fed to the depth of molten steel, and the static pressure on the calcium metal is increased; and since the aluminum metal and the calcium metal can form an aluminum-calcium complex element in the molten steel, the mutual protection enhances the oxidation resistance. The introduction of the aluminum enhances the boiling point of the calcium metal and reduces the gasification of the calcium metal, thereby increasing the yield of the calcium metal and aluminum metal, and thoroughly solving the problem of splashing in the molten steel calcium treatment process.
Description
Technical field
The invention belongs to the steel-making furnace outer refining technology, be specifically related to a kind of steel liquid deoxidation calcium and handle with the seamless aluminium core cabling wire that contains.
Background technology
In the steel smelting procedure, furnace outer refining process has obtained widespread use.Further desulfurization of furnace outer refining process, deoxidation and inclusion modification are handled, so that produce more high-quality ordinary steel and steel alloy, satisfy the demand that industrial and agricultural development is built.It is with injection metallurgy or injection feeding technology calcium metal or alloy to be added the molten steel deep that molten steel calcium is handled, and reaches deoxidation, desulfurization, makes the furnace outer refining technology of metallurgical effects such as non-metallic inclusion sex change.Because the fusing point low (845 ℃) of calcium metal, boiling point low (1450 ℃), in molten steel, float on very easily on the slag surface with airborne oxygen and slag liquid in the oxide compound reaction and scaling loss is fallen.So cored-wire is fed into the molten metal deep when feeding silk as far as possible, utilize the static pressure of molten metal, prevent that calcium metal from gasifying fast, thereby prolong calcium metal residence time in molten steel, molten steel is played good calcium processing effect.
The calcic of existing several types or the cored-wire of calcium alloy still have drawback: siliceous low calcium alloy cored-wire, and CaSi for example, its shortcoming is that molten steel increases silicon in the external refining process.Therefore be not suitable for low Si steel grade; Contain silico-calcium grain or abrasive grit mixture cored-wire, Fe+Ca pulvis cored-wire for example, its shortcoming is, because granulated metal calcium specific surface area is big, calcium metal is prone to oxidized.In addition, under refining temperature, after surrounding layer fusing, exposed calcium metal gasifies fast, is prone to cause slag liquid level fierceness to seethe and splash, and reduces the yield of calcium.For above-mentioned reasons, the yield of its calcium metal is generally 10%～15%.
On 01 12nd, 2011 disclosed " a kind of cored-wire and method of manufacture thereof " cored-wires (CN101942542A) of Intellectual Property in China office are to be made up of nexine core material and exoperidium, and exoperidium is formed by the steel band winding, and the nexine core material is the pure calcium of real core metal.Expectation can access higher yield, and defective is softening under action of high temperature behind the feeding ladle, so cored-wire can't penetrate molten steel and get into the depths, though adopt the pure calcium of metal, yield also only has 15%～25%, and splash is serious.
Intellectual Property in China office on December 15th, 2010 disclosed " method of manufacture of the real core spun yarn of high pure metal calcium " cored-wire making method (CN101914655A); Be to constitute by nexine core material and exoperidium; The nexine core material is a high pure metal calcium, and exoperidium is formed by the Low Carbon Steel Pipe drawing.Expectation can be fed into the molten steel depths with high pure metal calcium, obtains higher yield.Defective is that the solubleness of high pure metal calcium in molten steel is very little, even feeding is darker, yield increases to some extent, but when medium and small ladle feeds, still has the splash phenomenon.This cored-wire gets into surrounding layer thawing back, molten steel depths Ca metal and directly contacts the molten steel without thorough deoxidation in addition, and oxygen generation vigorous reaction has further aggravated the splash of molten steel in portion C a and the steel.
Summary of the invention
The objective of the invention is weak point according to above-mentioned prior art; A kind of seamless aluminium core cabling wire that contains is provided; This product has increased the layer of metal aluminium strip in common iron-calcium core-spun yarn, make that wherein calcium metal fusing back forms the complex deoxidization element with aluminium liquid, realizes protection each other; Thereby improve the yield of aluminium and calcium, avoided producing in the line feeding process ladle slag fierceness simultaneously and seethed and the phenomenon of splashing.
The object of the invention is realized being accomplished by following technical scheme:
A kind of seamless aluminium core cabling wire that contains; It is characterized in that said cored-wire is made up of surrounding layer and inner core, said surrounding layer is coated on interior core outer surface; Wherein surrounding layer is that the thick steel band of 0.3～0.8mm constitutes, and said inner core is combined by in aluminium and the calcium one or both.
Said inner core is combined by aluminium and calcium, and wherein said aluminium is aluminium strip, and calcium is calcium line, and aluminium strip is coated on outside the calcium line surface, and al zone thickness is 0.5～3mm.
Said calcium line diameter is not more than 8mm.
Said inner core is made up of aluminium, and said aluminium is aluminum core line, and its external diameter is not more than 13mm.
Said inner core is combined by aluminium and calcium, is the kalzium metal heart yearn, and its external diameter is not more than 13mm.
Said steel band is low-carbon (LC), low-silicon steel.
A kind of like the described seamless making method that contains aluminium core cabling wire of claim 1-6, it is characterized in that said method comprises the following step at least: pure calcium ingot is processed the metal calcium line on twine machine; The metal calcium line is imported in the aluminium strip of the section that takes the shape of the letter U, with the opening sealing welding of said U type, constitute aluminium calcium core afterwards; Afterwards said aluminium calcium core is imported in the box hat of the approximate U-shaped of section that is made up of steel band, afterwards with the U type opening welded seal of said box hat.
Advantage of the present invention is, can be according to the size of ladle, and the thickness of adjustment surrounding layer steel band realizes that calcium metal is fed the molten steel depths increases the static pressure that calcium metal receives.Because metallic aluminium and calcium metal can form aluminium calcium complex element in molten steel, give mutual protection and improved resistance of oxidation; The intervention of aluminium has also improved the boiling point of calcium metal, has weakened the gasification phenomenon of calcium metal, thereby has improved the yield of calcium metal and metallic aluminium.Can thoroughly solve the spraying state in the molten steel calcium treating processes according to the mass percent of the needs of steel grades adjustment calcium metal and metallic aluminium to satisfy the smelting technology of different steel mills.
Embodiment
Below through embodiment characteristic of the present invention and other correlated characteristic are done further explain so that technician's of the same trade understanding:
The seamless aluminium core cabling wire that contains that following embodiment relates to, its making method, carry out according to the following steps:
1, system calcium line: pure calcium ingot is processed the metal calcium line on twine machine;
2, once wrap up: the metal calcium line is imported in the aluminium strip of U-shaped, the longitudinal edge of the shell that will form so then preferentially passes through welded seal together with the close mode of liquid;
3, carry out the secondary parcel: steel band is shaped to roughly U-shaped, imports to the work in-process that form in the step (two) in the U-shaped box hat, the longitudinal edge of the shell that will form so then preferentially passes through welded seal together with the close mode of liquid;
4, precision work is handled: roll deeply or deep-draw step 3 in the work in-process line that forms, thus that heart yearn is inner air or other shielding gas are discharged;
5, bundling, packing.
Case study on implementation one: it is following that present embodiment seamless contains the specifications parameter of aluminium core cabling wire:
(1) seamless aluminium core cabling wire diameter: the 12mm that contains;
(2) steel band that surrounding layer: 0.6mm is thick;
(3) middle layer: the thick 2mm of aluminium strip;
(4) calcium core line diameter 6.5mm;
(5) every meter weight (gram): steel band 167, aluminium strip 122, calcium core 52.
The result of use of present embodiment in following molten steel is:
| Sequence number | Steel grade | Molten steel amount (ton) | Feed quantity (m/ stove) | Wire-feeding velocity (m/s) | Ca yield (%) | Al yield (%) | Spraying state |
| 1 | 20Cr | 50.5 | 60 | 1.0 | 45.76 | 99.21 | No splash |
| 2 | 20Cr | 49.7 | 60 | 1.0 | 46.21 | 99.64 | No splash |
| 3 | 20Cr | 49.9 | 60 | 1.0 | 47.46 | 98.87 | No splash |
| 4 | 20Cr | 51.3 | 60 | 1.0 | 46.37 | 99.08 | No splash |
| 5 | 20Cr | 50.4 | 60 | 1.0 | 45.82 | 99.37 | No splash |
| 6 | 20Cr | 51.7 | 60 | 1.0 | 47.71 | 99.41 | No splash |
| MV | ? | ? | ? | ? | 46.56 | 99.26 | ? |
Case study on implementation two: it is following that present embodiment seamless contains the specifications parameter of aluminium core cabling wire:
(1) seamless aluminium core cabling wire diameter: the 12mm that contains;
(2) the thick steel band of surrounding layer: 0.7mm;
(3) middle layer: the thick 1.3mm of aluminium strip;
(4) calcium core line diameter 7.6mm;
(5) every meter weight (gram): steel band 190, aluminium strip 76, calcium core 70.
The result of use of present embodiment in following molten steel is:
| Sequence number | Steel grade | Molten steel amount (ton) | Feed quantity (m/ stove) | Wire-feeding velocity (m/s) | Ca yield (%) | Al yield (%) | Splash |
| 1 | The 45# steel | 50.3 | 50 | 1.0 | 43.15 | 99.14 | No splash |
| 2 | The 45# steel | 49.4 | 50 | 1.0 | 42.56 | 99.38 | No splash |
| 3 | The 45# steel | 51.2 | 50 | 1.0 | 43.37 | 98.92 | No splash |
| 4 | The 45# steel | 51.6 | 50 | 1.0 | 42.92 | 99.25 | No splash |
| 5 | The 45# steel | 50.7 | 50 | 1.0 | 43.11 | 99.09 | No splash |
| 6 | The 45# steel | 50.5 | 50 | 1.0 | 44.04 | 99.32 | No splash |
| MV | ? | ? | ? | ? | 44.03 | 99.18 | ? |
The foregoing description is to be fed in the steel molten steel through wire feeder in the refining treatment later stages such as LF, RH.
Among the present invention; The fusing point of metallic aluminium and calcium metal and steel differs bigger, and the fusing point of metallic aluminium is 666 ℃, and the fusing point of calcium metal is 845 ℃; The fusing point of steel is about 1500 ℃; After in being fed into molten steel,, giving mutual protection and improved resistance of oxidation because metallic aluminium and calcium metal can form aluminium calcium complex element in molten steel; The intervention of aluminium has also improved the boiling point of calcium metal, has weakened the splash that the gasification phenomenon of calcium metal causes, thereby has improved the yield of calcium metal and metallic aluminium.Can find out that from the foregoing description the seamless yield that contains aluminium in the aluminium core cabling wire on average is higher than 98%, the yield of metallic aluminium increased when routine was fed aluminum steel.Simultaneously, the yield of calcium metal can reach more than 40% apparently higher than existing calcium line, and along with the seamless increase that contains aluminium content in the aluminium core cabling wire, the yield of calcium metal also can increase.Thoroughly solved in an embodiment in addition and in the line feeding process, produced the phenomenon that ladle slag fierceness is seethed and splashed.
Claims (7)
1. seamless aluminium core cabling wire that contains; It is characterized in that said cored-wire is made up of surrounding layer and inner core, said surrounding layer is coated on interior core outer surface; Wherein surrounding layer is that the thick steel material of 0.3～0.8mm constitutes, and said inner core is combined by in aluminium and the calcium one or both.
2. a kind of seamless aluminium core cabling wire that contains according to claim 1 is characterized in that said inner core is combined by aluminium and calcium, and wherein said aluminium is aluminium strip, and calcium is calcium line, and aluminium strip is coated on outside the calcium line surface, and al zone thickness is 0.5～3mm.
3. a kind of seamless aluminium core cabling wire that contains according to claim 2 is characterized in that said calcium line diameter is not more than 8mm.
4. a kind of seamless aluminium core cabling wire that contains according to claim 1 is characterized in that said inner core is made up of aluminium, and said aluminium is aluminum core line, and its external diameter is not more than 13mm.
5. a kind of seamless aluminium core cabling wire that contains according to claim 1 is characterized in that said inner core is combined by aluminium and calcium, is the kalzium metal heart yearn, and its external diameter is not more than 13mm.
6. a kind of seamless aluminium core cabling wire that contains according to claim 1 is characterized in that, said steel material is steel band or the steel pipe that low-carbon (LC), the plain steel of low silicon-carbon are processed.
7. one kind like the described seamless making method that contains aluminium core cabling wire of claim 1-6, it is characterized in that said method comprises the following step at least: pure calcium ingot is processed the metal calcium line on twine machine; The metal calcium line is imported in the aluminium strip of the section that takes the shape of the letter U, with the opening sealing welding of said U type, constitute aluminium calcium core afterwards; Afterwards said aluminium calcium core is imported in the box hat of the approximate U-shaped of section that is made up of steel band, afterwards with the U type opening welded seal of said box hat.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210138111XA CN102653808A (en) | 2012-05-07 | 2012-05-07 | Seamless aluminum-containing core-spun yarn |
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| CN201210138111XA CN102653808A (en) | 2012-05-07 | 2012-05-07 | Seamless aluminum-containing core-spun yarn |
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| CN102653808A true CN102653808A (en) | 2012-09-05 |
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| CN201210138111XA Pending CN102653808A (en) | 2012-05-07 | 2012-05-07 | Seamless aluminum-containing core-spun yarn |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019056876A1 (en) * | 2017-09-20 | 2019-03-28 | 安阳金源冶金材料有限责任公司 | Steel and aluminum mixed deoxidization alloying agent for steel making and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2579908Y (en) * | 2002-11-08 | 2003-10-15 | 左生华 | Core-coated aluminium wire |
| CN101942542A (en) * | 2010-08-24 | 2011-01-12 | 上海马腾新型材料厂 | Cored wire and manufacturing method thereof |
| CN102417950A (en) * | 2011-11-28 | 2012-04-18 | 巩义市众鑫钙业有限公司 | Seamless calcium line and preparation method thereof |
| CN102424893A (en) * | 2011-10-14 | 2012-04-25 | 陈来祥 | Solid metal calcium-aluminum cored wire and preparation method thereof |
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2012
- 2012-05-07 CN CN201210138111XA patent/CN102653808A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2579908Y (en) * | 2002-11-08 | 2003-10-15 | 左生华 | Core-coated aluminium wire |
| CN101942542A (en) * | 2010-08-24 | 2011-01-12 | 上海马腾新型材料厂 | Cored wire and manufacturing method thereof |
| CN102424893A (en) * | 2011-10-14 | 2012-04-25 | 陈来祥 | Solid metal calcium-aluminum cored wire and preparation method thereof |
| CN102417950A (en) * | 2011-11-28 | 2012-04-18 | 巩义市众鑫钙业有限公司 | Seamless calcium line and preparation method thereof |
Non-Patent Citations (1)
| Title |
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| 杨树岗: "包芯线在炼钢炉外精炼的应用及包芯线生产机组的发展", 《科技资讯》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019056876A1 (en) * | 2017-09-20 | 2019-03-28 | 安阳金源冶金材料有限责任公司 | Steel and aluminum mixed deoxidization alloying agent for steel making and preparation method thereof |
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Application publication date: 20120905 |