CN101554636A - Dieless drawing forming process of continuous columnar crystal or monocrystal texture metal material - Google Patents
Dieless drawing forming process of continuous columnar crystal or monocrystal texture metal material Download PDFInfo
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- CN101554636A CN101554636A CNA2009100820071A CN200910082007A CN101554636A CN 101554636 A CN101554636 A CN 101554636A CN A2009100820071 A CNA2009100820071 A CN A2009100820071A CN 200910082007 A CN200910082007 A CN 200910082007A CN 101554636 A CN101554636 A CN 101554636A
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Abstract
The invention belongs to the technical field of metal material thermal treatment and particularly provides a dieless drawing forming process of continuous columnar crystal or monocrystal texture metal material. The process flow is as follows: taking cast metal bar material, wire stock or tubular products with continuous columnar crystal or monocrystal texture as stock; heating the stock to the temperature between 0.4-0.9 time of the temperature of melting point of the stock in dieless drawing, adopting an air-cooling or water-cooling manner for cooling; and obtaining a metal material product still with the continuous columnar crystal texture, continuous fibrous crystal texture or monocrystal texture and the highest reduction of cross-sectional area being 70 percent by controlling the ratio of drawing velocity Vo to stock feeding velocity Vi, wherein in water-cooling, the distance between a cold source and a heat source is 5-50mm, the flow rate of cooling water is 40-90L/h, and Vo/Vi is more than 1 and less than 3. The process has the advantages that the formed metal material has excellent mechanical property, physical property and chemical property; the deformation for a pass is big, the production efficiency is high, a die is not needed, friction, lubrication and pollution are not caused and the production cost is low.
Description
Technical field
The invention belongs to field of metal material heat processing technology, a kind of continuous columnar or single crystal organization metal material Dieless drawing forming process particularly are provided.
Background technology
The metal material of continuous cylindrical crystalline texture (or the brilliant tissue of continuous fiber) or single crystal organization is owing to the horizontal crystal boundary that does not exist perpendicular to length direction, have good plastic deformation ability and physics, chemistry and mechanical property [Xie Jianxin, Deng. materials processing new technology and new technology [M]. Beijing: metallurgical industry publishing house, 2004], in national economy high-tech sector and defence and military field important use being arranged, is at present both at home and abroad just at an active development and a class high performance material of applying.
In order still to be continuous cylindrical crystalline texture (or the brilliant tissue of continuous fiber) or single crystal organization after the metal material process plastic deformation that makes continuous cylindrical crystalline texture or single crystal organization, keep its excellent performance, traditional method is to adopt low temperature to force construction method to the as cast metal blank with continuous cylindrical crystalline texture or single crystal organization to carry out organizational controls, the plastic working of this metalloid and annealing in process are all carried out being lower than below the recrystallization temperature, comprise cold working, temperature processing, process annealing, recovery annealing etc., prevent to produce crystallization again and become equiaxed grain structure [Zhang Hong, Xie Jianxin, Wang Zidong.Fabrication of purecopper rods containing continuous columnar crystals by continuous unidirectional solidificationtechnology[J] .Journal of University of Science and Technology Beijing, 2004,11 (3): 240～244].But low temperature forces that construction method exists that technological process is long, pass deformation is less, production efficiency is lower, production cost is than problems such as height.
Traditional hot-working method causes continuous cylindrical crystalline texture or single crystal organization metal material that crystallization again takes place easily, can not obtain the product of desired performance.
It is a kind of traditional drawing mould that do not use that dieless drawing is shaped, the hot-working method that carries out Plastic Forming is controlled in heating and cooling by Cooling and Heat Source, have and be rapidly heated, cooling fast, the following time of staying of high temperature is short, drawing process does not have friction, required pulling capacity is little, single pass deformation is big, high advantage [the Furushima T that is better than conventional drawing process of production efficiency, ManabeK.Experimental study on multi-pass dieless drawing process of superplastic Zn-22%Al alloymicrotubes[J] .Journal of Materials Processing Technology, 2007,187 (12): 236～240], be suitable for various difficult-to-machine materials, become the processing of section material.But up to now, do not see the relevant report that adopts the processing of dieless drawing method to have continuous cylindrical crystalline texture or single crystal organization material.
Summary of the invention
The object of the present invention is to provide a kind of continuous columnar or single crystal organization metal material Dieless drawing forming process, solving conventional low temperature, to force be shaped continuous columnar or the technological process of single crystal organization metal material of worker longer, pass deformation is less, production efficiency is lower, the production cost height, and traditional hot shapes and easily causes its tissue that dynamic recrystallization takes place, can not keep problems such as continuous cylindrical crystalline texture (or the brilliant tissue of continuous fiber) or the peculiar excellent properties of single crystal organization, utilize dieless drawing heat temperature raising speed fast, cooling velocity is fast, the deformed area is short characteristics of the time of staying at high temperature, develop a kind of Dieless drawing forming process that is suitable for continuous columnar or single crystal organization metal material, flow process is short, pass deformation is big, the working (machining) efficiency height, and can keep continuous cylindrical crystalline texture (or the brilliant tissue of continuous fiber) or single crystal organization, obtain to have the product of excellent properties.
A kind of continuous columnar or single crystal organization metal material Dieless drawing forming process, technology is as follows:
With as cast metal bar, wire rod or the tubing with continuous cylindrical crystalline texture or single crystal organization is blank.During dieless drawing with blank heating between 0.40～0.90 times of its melting temperature Tm (representing unit K with absolute temperature), adopt the cooling of air cooling or water-cooling pattern, Cooling and Heat Source distance 5～50mm, cooling water flow 40～90L/h during water-cooled.Ratio (wherein 1＜Vo/Vi＜3) by control drawing speed Vo and blank feed rate Vi obtains the contraction percentage of area and can reach 70% and still have a product of metal material of continuous cylindrical crystalline texture (or the brilliant tissue of continuous fiber) or single crystal organization.
The invention has the advantages that:
1, formed metal material still has continuous cylindrical crystalline texture (or the brilliant tissue of continuous fiber) or single crystal organization, has excellent mechanical property, physical property and chemical property.
2, pass deformation is big, the production efficiency height.
3, do not need mould, do not have friction, unlubricated, pollution-free, production cost is low.
Description of drawings
Fig. 1 is the metallograph figure with as cast metal blank of continuous cylindrical crystalline texture.
Fig. 2 has the metallograph figure of continuous cylindrical crystalline texture material after dieless drawing processing, still is continuous cylindrical crystalline texture.
The specific embodiment
Embodiment 1:
With diameter 6mm, as cast condition Cu-12wt%Al alloy wire base with continuous cylindrical crystalline texture is machined material, under the condition of heating-up temperature 873K (for 0.67 times of its melting temperature Tm), air cooling, drawing speed Vo and the ratio Vo/Vi=2.4 of blank feed rate Vi, carry out the dieless drawing shaping, obtain the Cu-12wt%Al alloy wire of diameter 3.8mm, it is organized and still is continuous cylindrical crystalline texture.
Embodiment 2:
With diameter 6mm, as cast condition Cu-12wt%Al alloy wire base with continuous cylindrical crystalline texture is machined material, under heating-up temperature 1073K (for 0.82 times of its melting temperature Tm), water-cooled, the condition of Cooling and Heat Source, carry out the dieless drawing shaping apart from the ratio Vo/Vi=2.8 of 5mm, cooling water flow 54L/h, drawing speed Vo and blank feed rate Vi, obtain the Cu-12wt%Al alloy wire of diameter 3.5mm, it is organized and still is continuous cylindrical crystalline texture.
Embodiment 3:
With diameter 6mm, as cast condition Cu-12wt%Al alloy wire base with continuous cylindrical crystalline texture is machined material, under heating-up temperature 1173K (for 0.90 times of its melting temperature Tm), water-cooled, the condition of Cooling and Heat Source, carry out the dieless drawing shaping apart from the ratio Vo/Vi=2 of 5mm, cooling water flow 90L/h, drawing speed Vo and blank feed rate Vi, obtain the Cu-12wt%Al alloy wire of diameter 4mm, it is organized and still is continuous cylindrical crystalline texture.
Embodiment 4:
With diameter 6mm, as cast condition Cu-12wt%Al alloy wire base with single crystal organization is machined material, under heating-up temperature 773K (for 0.59 times of its melting temperature Tm), water-cooled, the condition of Cooling and Heat Source, carry out the dieless drawing shaping apart from the ratio Vo/Vi=2.4 of 20mm, cooling water flow 40L/h, drawing speed Vo and blank feed rate Vi, obtain the Cu-12wt%Al alloy wire of elliptic cross-section (showing typical class monocrystalline room temperature tensile deformational behavior), it is organized and still is single crystal organization.
Embodiment 5:
With diameter 6mm, as cast condition pure copper wire base with continuous cylindrical crystalline texture is machined material, under the condition of heating-up temperature 973K (for 0.72 times of its melting temperature Tm), air cooling, drawing speed Vo and the ratio Vo/Vi=2.6 of blank feed rate Vi, carry out the dieless drawing shaping, obtain the pure copper wires of diameter 3.7mm, it is organized and still is continuous cylindrical crystalline texture.
Embodiment 6:
With external diameter 10mm, wall thickness 2mm, as cast condition BFe10-1-1 alloy pipe stock with continuous cylindrical crystalline texture is machined material, under heating-up temperature 1123K (for 0.81 times of its melting temperature Tm), water-cooled, the condition of Cooling and Heat Source, carry out the dieless drawing shaping apart from the ratio Vo/Vi=1.2 of 20mm, cooling water flow 55L/h, drawing speed Vo and blank feed rate Vi, obtain the BFe10-1-1 alloy pipe of external diameter 7.82mm, wall thickness 1.56mm, it is organized and still is continuous cylindrical crystalline texture.
Embodiment 7:
With external diameter 10mm, wall thickness 1.8mm, as cast condition Cu-14.3wt%Al-4wt%Ni alloy pipe stock with continuous cylindrical crystalline texture is machined material, under heating-up temperature 1123K (for 0.84 times of its melting temperature Tm), water-cooled, the condition of Cooling and Heat Source, carry out the dieless drawing shaping apart from the ratio Vo/Vi=1.4 of 50mm, cooling water flow 54L/h, drawing speed Vo and blank feed rate Vi, obtain the Cu-14.3wt%Al-4wt%Ni alloy pipe of external diameter 7.3mm, wall thickness 1.24mm, it is organized and still is continuous cylindrical crystalline texture.
Claims (1)
1. continuous columnar or single crystal organization metal material Dieless drawing forming process is characterized in that technological process is as follows:
With as cast metal bar, wire rod or the tubing with continuous cylindrical crystalline texture or single crystal organization is blank; During dieless drawing with blank heating between 0.40～0.90 times of its melting temperature Tm, adopt the cooling of air cooling or water-cooling pattern, Cooling and Heat Source distance 5～50mm, cooling water flow 40～90L/h during water-cooled, ratio by control drawing speed Vo and blank feed rate Vi obtains the contraction percentage of area and is up to 70% and still have the product of metal material of continuous cylindrical crystalline texture or brilliant tissue of continuous fiber or single crystal organization, wherein 1＜Vo/Vi＜3.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100820071A CN101554636B (en) | 2009-04-17 | 2009-04-17 | Dieless drawing forming process of continuous columnar crystal or monocrystal texture metal material |
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| CN2009100820071A CN101554636B (en) | 2009-04-17 | 2009-04-17 | Dieless drawing forming process of continuous columnar crystal or monocrystal texture metal material |
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| CN101554636A true CN101554636A (en) | 2009-10-14 |
| CN101554636B CN101554636B (en) | 2010-10-27 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102133583A (en) * | 2011-05-04 | 2011-07-27 | 北京科技大学 | Die/dieless integrated drawing process and device |
| CN102133582A (en) * | 2011-05-04 | 2011-07-27 | 北京科技大学 | Mold/non-mode combined pulling process and device |
| CN104438387A (en) * | 2014-11-13 | 2015-03-25 | 北京科技大学 | Method for improving metal non-restraint plastic forming stability |
| CN105598400A (en) * | 2016-01-08 | 2016-05-25 | 长沙理工大学 | Short-process forming process for high-tin bronze wire |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1161197C (en) * | 2002-04-12 | 2004-08-11 | 北京科技大学 | Prepn process of superfine oxygen-free copper wire |
| CN101020197B (en) * | 2006-10-09 | 2010-09-01 | 北京科技大学 | Intelligent no-mold drawing formation apparatus and process |
| CN101249520A (en) * | 2008-03-28 | 2008-08-27 | 沈阳理工大学 | Non-mould drawing forming method and apparatus |
-
2009
- 2009-04-17 CN CN2009100820071A patent/CN101554636B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102133583A (en) * | 2011-05-04 | 2011-07-27 | 北京科技大学 | Die/dieless integrated drawing process and device |
| CN102133582A (en) * | 2011-05-04 | 2011-07-27 | 北京科技大学 | Mold/non-mode combined pulling process and device |
| CN104438387A (en) * | 2014-11-13 | 2015-03-25 | 北京科技大学 | Method for improving metal non-restraint plastic forming stability |
| CN104438387B (en) * | 2014-11-13 | 2016-06-08 | 北京科技大学 | A kind of method improving metal unconfinement plastic making stability |
| CN105598400A (en) * | 2016-01-08 | 2016-05-25 | 长沙理工大学 | Short-process forming process for high-tin bronze wire |
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