CN102941324A - Preparation method of aluminum alloy circular rod - Google Patents
Preparation method of aluminum alloy circular rod Download PDFInfo
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- CN102941324A CN102941324A CN201210500104XA CN201210500104A CN102941324A CN 102941324 A CN102941324 A CN 102941324A CN 201210500104X A CN201210500104X A CN 201210500104XA CN 201210500104 A CN201210500104 A CN 201210500104A CN 102941324 A CN102941324 A CN 102941324A
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- round bar
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- circular rod
- aluminum alloy
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Abstract
The invention discloses a preparation method of an aluminum alloy circular rod and belongs to the field of aluminum alloy circular rod preparation. The preparation method comprises the following steps of: casting alloy liquid obtained by material preparation, smelting, refining, heat preservation and online filtering treatment in a casting furnace with a multi-head horizontal casting crystallizer to obtain a small-disc circular rod blank; then washing, rinsing and drying the small-disc circular rod blank; then feeding the small-disc circular rod blank within 24 hours into a continuous extruding machine to carry out continuous extrusion to obtain the circular rod with the diameter of phi 3-16 mm; then directly cooling the circular rod through a water groove; and then winding the circular rod by utilizing a constant-tension winding device. Compared with the prior art, the preparation method of the aluminum alloy circular rod has the characteristics of small investment, simple process, high finished-product rate, low production cost and the like, and is convenient to operate and flexible to produce. The preparation method can be widely applied to development and production of a circular aluminum alloy rod for electricians, an aluminum alloy rod for continuous extrusion, an aluminum alloy rod for a welding material and the like.
Description
Technical field
The present invention relates to aluminium alloy round bar preparation field, specifically a kind of aluminium alloy round bar preparation method.
Background technology
The aluminium alloy round bar is the main raw material(s) of producing aluminium alloy conductor, aluminium alloy pipe and aluminium alloy welding wire etc., and at present, the production technology of aluminium alloy round bar has vertical semi-continuous casting-extrusion, continuous casting and rolling method and horizontal casting to connect three kinds of methods of daraf(reciprocal of farad).
Vertical semi-continuous casting-extrusion prepares the technological process of aluminium alloy round bar: the line base about batching → fusing → refining → vertical semi-continuous casting → ingot homogenization → ingot casting heating → hot extrusion → Ф 8 mm.But this process route equipment investment is larger, operation is many, floor space is large, tool and mould consumption and energy consumption are higher, how much waste materials in the production process are also high, the finished product rate is relatively low, and what is more important conventional extrusion product structure property goes up very inhomogeneous along its length and joint is arranged, this will seriously have influence on subsequently the deep processing performance and the performance uniformity of final products.
Casting and rolling process is the main method that wires and cables industry is produced aluminium and soft aluminium alloy wire base, its technological process: the line base about batching → fusing → refining → continuous casting (length of side is the blank of 40～50 mm diamond-shaped cross-sections) → hot continuous rolling (13 passage) → Ф 9.8mm.This process route equipment investment is moderate, and the product substance is large, lumber recovery is high (more than 90%), quality is relatively stable.Domestic some producer is in the exploitation of carrying out aluminum alloy round bar continuous casting and tandem rolling technique and equipment, but also do not adopt this process route normally to produce the precedent of aluminium alloy round bar.Oxide-film and entering of lubricating oil are quite difficult in oxide inclusion and the operation of rolling but enter in the control casting process, even can't solve technically.
Horizontal casting connects the technological process that daraf(reciprocal of farad) prepares the aluminium alloy round bar: batching → fusing → refining → horizontal casting connects the line base that draws about (12 or 24 crystallizer parallel connections) → Ф 12 mm.The characteristics that horizontal casting connects daraf(reciprocal of farad) are that equipment investment is few, the yield rate of wire rod high (more than 90%).Yet more common gravity segregation, dendritic segregation, cyrystal boundary segregation and regional segregation inevitably appear in the horizontal casting aluminium alloy rod base, and these are segregated in and are difficult to eliminate it in the follow-up drawing process, usually adopt horizontal casting aluminium alloy rod base is carried out homogenising to process.This has not only increased operation and production cost, but also can make bar base surface oxidation serious.In addition, in the situation that horizontal casting-Lian La, the line base that draws out is a kind of cast sturcture basically, and plasticity ratio is relatively poor, and the follow-up product joint that draws out is more.
Summary of the invention
It is high that technical assignment of the present invention provides a kind of stock utilization, and goods length is large, the uniform aluminium alloy round bar of structure property preparation method.
Technical assignment of the present invention is realized in the following manner, this preparation method's step is as follows: cast with the foundry furnace of multi-piece horizontally continuous cast mold through the aluminium alloy employing that batching, fusing, refining, insulation, on-line filtration obtain after processing, 680～730 ℃ of casting temperatures, horizontal casting speed 600～1300mm/min gets the shallow bid round bar base of diameter Ф 8～Ф 16mm; Afterwards shallow bid round bar base is cleaned, rinsing and drying, 50～70 ℃ of temperature controls, afterwards shallow bid round bar base is sent into continuous extruder and carried out continuously extruded being no more than in 24 hours, temperature is 200～450 ℃, the extruder rotating speed is 15～24rpm, make the round bar that diameter is Ф 3～Ф 16mm, then round bar is directly cooled off by tank, temperature keeps 40～60 ℃ after the cooling; Recycling permanent tension force receives winding apparatus and round bar is carried out rolling gets final product.
Described horizontal continuous casting crystallizer and foundry furnace are sealedly and fixedly connected.
Described shallow bid round bar base carries out the shallow bid docking by cold welding before sending into continuous extruder, to realize uninterrupted charging.
A kind of aluminium alloy round bar preparation method of the present invention is compared with existing technology, and has following characteristics:
1) because in casting process, melt does not contact with atmosphere, can exempt the living slag of oxidation and gas and sneak into ingot casting, therefore, horizontal casting round bar oxide slag inclusion thing is few, air content is low;
2) horizontal continuous casting crystallizer is short, and setting rate is high.Therefore, bar base surface quality is good, and the apparent size precision is high, and the interior tissue performance is even, and grain size is tiny, and the solid solubility of alloy and impurity element is large;
3) once horizontal casting bar base is squeezed into the aluminium alloy round bar of different specification size, has effectively improved casting flaw more common in the horizontal casting, can prepare all aluminium alloy round bars of even excellent surface quality of fine microstructures, performance.
The specific embodiment
Embodiment 1:
Adopt 99.7% aluminium ingot, magnesium ingot and Al-Fe, Al-Cu intermediate alloy, according to the part by weight of electrician with each alloy adding of chemical analysis range computation of 8030 aluminium alloys, in this ratio batching, in two 500Kg capacity combustion gas smelting furnaces behind fusing, refining, insulation and on-line filtration, adopt the spectrum direct-read method that solution is taken a sample and carry out chemical composition analysis, the actual measurement composition sees Table 1.The horizontal caster that adopts 10 horizontal continuous casting crystallizers and foundry furnace to be sealedly and fixedly connected is cast as the shallow bid round bar base that diameter is Ф 8mm, casting temperature is controlled to be 680～700 ℃, horizontal casting hauling speed 1300mm/min obtains heavily approximately 100Kg horizontal casting shallow bid round bar base of every dish.This shallow bid round bar base after cleaning, rinsing, drying, is squeezed into the round bar product that diameter is Ф 3mm at LJ300 aluminium continuous extruder, and continuously extruded temperature is controlled to be 200～320 ℃, and the extruder rotating speed is 24rpm; Then round bar is directly cooled off by tank, temperature keeps 40～60 ℃ after the cooling; Recycling permanent tension force receives winding apparatus and round bar is carried out rolling gets final product.
This product is carried out cross section grain size, mechanical property and electrical property test, and state's series products of its mean value and the production of corresponding continuous casting and rolling technology process is compared, see Table 2.Found that: the properties of product that the present invention produces obviously are better than the continuous casting and rolling technology process.
Table 1 8030 aluminium alloys actual measurement chemical composition/wt%
| The preparation method | Si | Fe | Cu | Mn | Mg | Zn | B |
| The present invention | 0.048 | 0.565 | 0.205 | 0.009 | 0.018 | 0.011 | 0.02 |
| Continuous casting and rolling | 0.056 | 0.326 | 0.163 | 0.010 | 0.005 | 0.010 | - |
Table 2 8030 aluminium alloy rod section grain sizes, mechanical property and electrical property
| The preparation method | Grain size | Tensile strength/MPa | Percentage elongation (A100)/% | Resistivity/n Ω m |
| The present invention | Less than 2 grades | 127 | 25 | 28.63 |
| Continuous casting and rolling | 3 ~ 4 grades | 116 | 21 | 28.92 |
Embodiment 2:
Adopt 99.7% aluminium ingot, magnesium ingot and Al-Fe, Al-Cu intermediate alloy, according to the part by weight of electrician with each alloy adding of chemical analysis range computation of 6201 aluminium alloys, in this ratio batching, in two 500Kg capacity combustion gas smelting furnaces behind fusing, refining, insulation and on-line filtration, adopt the spectrum direct-read method that solution is taken a sample and carry out chemical composition analysis, the actual measurement composition sees Table 3.The horizontal caster that adopts 10 horizontal continuous casting crystallizers and foundry furnace to be sealedly and fixedly connected is cast as the shallow bid round bar base that diameter is Ф 16mm, casting temperature is controlled to be 680～700 ℃, horizontal casting hauling speed 600mm/min obtains heavily approximately 100Kg horizontal casting shallow bid round bar base of every dish.This shallow bid round bar base after cleaning, rinsing, drying, is squeezed into the round bar product that diameter is Ф 16mm at LJ300 aluminium continuous extruder, and continuously extruded temperature is controlled to be 320～350 ℃, and the extruder rotating speed is 15rpm; Then round bar is directly cooled off by tank, temperature keeps 40～60 ℃ after the cooling; Recycling permanent tension force receives winding apparatus and round bar is carried out rolling gets final product.
This product is carried out cross section grain size, mechanical property and electrical property test, and state's series products of its mean value and the production of corresponding continuous casting and rolling technology process is compared, see Table 4.Found that: the properties of product that the present invention produces obviously are better than the continuous casting and rolling technology process.
Table 3 6201 aluminium alloys actual measurement chemical composition/wt%
| The preparation method | Si | Fe | Cu | Mn | Mg | Zn | Ti | B |
| The present invention | 0.605 | 0.197 | 0.008 | 0.011 | 0.694 | 0.011 | 0.004 | 0.03 |
| Continuous casting and rolling | 0.457 | 0.204 | 0.006 | 0.005 | 0.537 | 0.012 | 0.015 | - |
Table 4 6201 aluminium alloy rod section grain sizes, mechanical property and electrical property
| The preparation method | Grain size | Tensile strength/MPa | Percentage elongation (A100)/% | Resistivity/n Ω m |
| The present invention | Less than 2 grades | 197 | 23 | 33.54 |
| Continuous casting and rolling | 4 ~ 4.5 grades | 184 | 17 | 33.92 |
Embodiment 3:
Adopt 99.7% aluminium ingot, magnesium ingot and Al-Fe, Al-Cu intermediate alloy, according to the part by weight of electrician with each alloy adding of chemical analysis range computation of 3003 aluminium alloys, in this ratio batching, in two 500Kg capacity combustion gas smelting furnaces behind fusing, refining, insulation and on-line filtration, adopt the spectrum direct-read method that solution is taken a sample and carry out chemical composition analysis, the actual measurement composition sees Table 5.The horizontal caster that adopts 10 horizontal continuous casting crystallizers and foundry furnace to be sealedly and fixedly connected is cast as the shallow bid round bar base that diameter is Ф 12mm, casting temperature is controlled to be 710～730 ℃, horizontal casting hauling speed 1000mm/min obtains heavily approximately 100Kg horizontal casting shallow bid round bar base of every dish.This shallow bid round bar base after cleaning, rinsing, drying, is squeezed into the round bar product that diameter is Ф 10mm at LJ300 aluminium continuous extruder, and continuously extruded temperature is controlled to be 400～450 ℃, and the extruder rotating speed is 20rpm; Then round bar is directly cooled off by tank, temperature keeps 40～60 ℃ after the cooling; Recycling permanent tension force receives winding apparatus and round bar is carried out rolling gets final product.
This product is carried out cross section grain size, mechanical property and electrical property test, and state's series products of its mean value and the production of corresponding continuous casting and rolling technology process is compared, see Table 6.Found that: the properties of product that the present invention produces obviously are better than the continuous casting and rolling technology process.
Table 5 3003 aluminium alloys actual measurement chemical composition/wt%
| The preparation method | Si | Fe | Cu | Mn | Mg | Zn | Ti |
| The present invention | 0.043 | 0.270 | 0.175 | 1.110 | 0.005 | 0.012 | 0.080 |
| Continuous casting and rolling | 0.272 | 0.400 | 0.089 | 1.020 | 0.003 | 0.010 | 0.098 |
Table 6 3003 aluminium alloy rod section grain size and mechanical properties
| The preparation method | Grain size | Tensile strength/MPa | Percentage elongation (A50)/% |
| The present invention | Less than 2 grades | 125 | 34 |
| Continuous casting and rolling | 3 ~ 5 grades | 115 | 32 |
Claims (3)
1. an aluminium alloy round bar preparation method is characterized in that, described preparation method's step is as follows:
Cast with the foundry furnace of multi-piece horizontally continuous cast mold through the aluminium alloy employing that batching, fusing, refining, insulation, on-line filtration obtain after processing, 680～730 ℃ of casting temperatures, horizontal casting speed 600～1300mm/min gets the shallow bid round bar base of diameter Ф 8～Ф 16mm; Afterwards shallow bid round bar base is cleaned, rinsing and drying, 50～70 ℃ of temperature controls, afterwards shallow bid round bar base is sent into continuous extruder and carried out continuously extruded being no more than in 24 hours, temperature is 200～450 ℃, the extruder rotating speed is 15～24rpm, make the round bar that diameter is Ф 3～Ф 16mm, then round bar is directly cooled off by tank, temperature keeps 40～60 ℃ after the cooling; Recycling permanent tension force receives winding apparatus and round bar is carried out rolling gets final product.
2. aluminium alloy round bar preparation method according to claim 1 is characterized in that, described horizontal continuous casting crystallizer and foundry furnace are sealedly and fixedly connected.
3. aluminium alloy round bar preparation method according to claim 1 is characterized in that, described shallow bid round bar base carries out the shallow bid docking by cold welding before sending into continuous extruder, to realize uninterrupted charging.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104195379A (en) * | 2014-08-21 | 2014-12-10 | 周俊民 | 8030 aluminum alloy rod for cables and preparation method thereof |
| CN109317532A (en) * | 2018-10-11 | 2019-02-12 | 广东华劲金属型材有限公司 | A kind of preparation method of aluminium bar bus |
| CN112570991A (en) * | 2020-11-10 | 2021-03-30 | 湖南乾龙新材料有限公司 | Production method of high-strength high-conductivity aluminum alloy conductor rail section bar |
| CN113649415A (en) * | 2021-08-18 | 2021-11-16 | 江苏中天科技股份有限公司 | Preparation process of high-strength aluminum alloy welding wire |
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| JPS60187426A (en) * | 1984-03-07 | 1985-09-24 | Kobe Steel Ltd | Manufacture of seamless stainless steel pipe |
| US4817701A (en) * | 1982-07-26 | 1989-04-04 | Steel Casting Engineering, Ltd. | Method and apparatus for horizontal continuous casting |
| CN101447259A (en) * | 2008-12-25 | 2009-06-03 | 中铁建电气化局集团有限公司 | Manufacture methods of contact wire and rod blank |
| CN102303057A (en) * | 2011-09-19 | 2012-01-04 | 大连交通大学 | Continuous casting and continuous extrusion device and production method for metal |
| CN102676870A (en) * | 2012-06-07 | 2012-09-19 | 铁岭富兴铜业有限公司 | Lead-free copper alloy wire material and preparation method thereof |
| CN102794321A (en) * | 2012-08-17 | 2012-11-28 | 天津金源工业技术服务有限公司 | Preparation process of composite bimetallic wire substrate |
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- 2012-11-30 CN CN201210500104XA patent/CN102941324A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4817701A (en) * | 1982-07-26 | 1989-04-04 | Steel Casting Engineering, Ltd. | Method and apparatus for horizontal continuous casting |
| JPS60187426A (en) * | 1984-03-07 | 1985-09-24 | Kobe Steel Ltd | Manufacture of seamless stainless steel pipe |
| CN101447259A (en) * | 2008-12-25 | 2009-06-03 | 中铁建电气化局集团有限公司 | Manufacture methods of contact wire and rod blank |
| CN102303057A (en) * | 2011-09-19 | 2012-01-04 | 大连交通大学 | Continuous casting and continuous extrusion device and production method for metal |
| CN102676870A (en) * | 2012-06-07 | 2012-09-19 | 铁岭富兴铜业有限公司 | Lead-free copper alloy wire material and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104195379A (en) * | 2014-08-21 | 2014-12-10 | 周俊民 | 8030 aluminum alloy rod for cables and preparation method thereof |
| CN104195379B (en) * | 2014-08-21 | 2016-02-03 | 周俊民 | A kind of cable 8030 aluminium alloy rods and preparation method thereof |
| CN109317532A (en) * | 2018-10-11 | 2019-02-12 | 广东华劲金属型材有限公司 | A kind of preparation method of aluminium bar bus |
| CN112570991A (en) * | 2020-11-10 | 2021-03-30 | 湖南乾龙新材料有限公司 | Production method of high-strength high-conductivity aluminum alloy conductor rail section bar |
| CN113649415A (en) * | 2021-08-18 | 2021-11-16 | 江苏中天科技股份有限公司 | Preparation process of high-strength aluminum alloy welding wire |
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Application publication date: 20130227 |