CN100999011A - Short process high efficiency preparation method of high aluminium coppe alloy precision pipe material - Google Patents
Short process high efficiency preparation method of high aluminium coppe alloy precision pipe material Download PDFInfo
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- CN100999011A CN100999011A CN 200710062679 CN200710062679A CN100999011A CN 100999011 A CN100999011 A CN 100999011A CN 200710062679 CN200710062679 CN 200710062679 CN 200710062679 A CN200710062679 A CN 200710062679A CN 100999011 A CN100999011 A CN 100999011A
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Abstract
The present invention relates to a short-process high-effective preparation method of high-aluminium copper alloy precision pipe material. It is characterized by adopting a continuous unidirectional solidification method to prepare the high-aluminium copper alloy precision pipe material, its preparation process includes the following steps: melting copper alloy ingot with high aluminium content or oxygen-free copper and pure aluminium (for alloy containing more than three components, it also includes other alloy element, for example nickel) at 1150-1550 deg.C, continuous unidirectional solidification billet-drawing speed is 1-200 mm/min, cooling water rate is 100-1300 L/h, cooling water temperature is 20-30 deg.C and degree of vacuum is 0.1-2Pa, preparing the high-aluminium copper alloy precision pipe material whose outer diameter is 8-40 mm and wall thickness is 1-5 mm.
Description
Technical field
The invention belongs to the nonferrous metal new material preparing technical field, a kind of short process high efficiency preparation method of high aluminium coppe alloy precision pipe material particularly is provided.
Background technology
The copper alloy precision tube that contains aluminium has excellent physics, mechanical property and corrosion resisting property, has purposes very widely in fields such as electronic information, machinery, Aero-Space, communications and transportation, building, chemistry medical treatment, the energy, household electrical appliances and daily living articles.But, when the aluminium content in the copper alloy higher (mass fraction of aluminium 〉=7%), alloy exists problems such as plasticity is low, processing difficulties, cause that its precision tube prepares the processing technology complexity, lumber recovery is low, cost is high, seriously restricted further applying of high aluminium content copper alloy precision tube.
Continuous directional solidification technology [big wild sincere U.S., " Japanese metallography can be reported ", 1984,23 (9): 773] be that directional solidification technique and continuous casting technology combine and a kind of short flow high efficiency material preparation technology of growing up, comprise that glass tube down-drawing, horizontal casting method or up-drawing method [see: Liu Xingjun, Xin Ping, thank and build volumes such as new, the first Chinese scholar's 21 century material science and technology Conference Papers collection (Tokyo) of studying in Japan, p.109～117, metallurgical industry publishing house, 2000.10].This technology changes the cooling casting mold of traditional continuous casting into heated mold, in the frozen metal with do not set up along the high-temperature gradient of throwing direction in the solidified melt, form the directional solidification condition, thereby can be used for preparing surface-brightening continuously, have the material of continuous cylindrical crystalline texture along its length even single crystal organization, and prepared material also can make its cold working plastic deformation ability significantly improve than the routine casting moulding material except that having good physics, chemistry and mechanical property.Therefore, utilize these advantages of this technology, be used for the production of extraordinary difficult-to-machine material, can improve the plastic deformation ability of this type of material greatly, simplify the preparation processing technology, improve lumber recovery.
Summary of the invention
The object of the present invention is to provide a kind of short process high efficiency preparation method of high aluminium coppe alloy precision pipe material, solved the high aluminium copper precision tube of conventional preparation complex process, lumber recovery is low, product quality and performance are difficult to satisfy problems such as instructions for use, develop a kind of high aluminium copper precision tube continuous directional solidifying method for preparing, this method technology is simple, can prepare the tubing of external diameter 8～40mm, wall thickness 1～5mm.Tubing has single crystal organization or continuous cylindrical crystalline texture, and the column crystal diameter is between 0.1～1.8mm.
The present invention adopts continuous directional solidification method preparation to have the single crystal organization or the high aluminium copper precision tube of continuous cylindrical crystalline texture along its length, technology is: with the copper alloy casting ingot or the oxygen-free copper of high aluminium content, fine aluminium is (for the alloy more than the ternary, then also comprise other alloying elements, as nickel) 1150～1550 ℃ of fusings down, the continuous directional solidification casting speed is 1～200mm/min, cooling water inflow is 100～1300L/h, cooling water temperature is 20～30 ℃, vacuum is 0.1～2Pa, makes external diameter 8～40mm, the high aluminium copper precision tube of wall thickness 1～5mm.The continuous directional solidification method can be glass tube down-drawing, horizontal casting method or up-drawing method.
The invention has the advantages that:
1, adopt the continuous directional solidification legal system to be equipped with high aluminium copper precision tube, its inside is single crystal organization or along the continuous columanar structure of pipe length direction, have the cold deformation ability more outstanding than the common polycrystalline tubing of same outer diameter as, mechanical property and physical property significantly improve.
2, adopt continuous directional solidification to prepare high aluminium copper precision tube, its casting speed maximum can reach 150～200mm/min, is suitable for industrial production in batches.
The specific embodiment
Embodiment 1: the Cu-14.3wt%Al-4wt%Ni marmem pipe material of external diameter 10mm, wall thickness 1.5mm.Adopting copper content is that 99.9% oxygen-free copper, aluminium content are that 99.9% pure al and ni content is that 99.99% pure nickel is a raw material, and wherein the mass fraction of aluminium content is 14.3%, the mass fraction of nickel content is 4%.At first oxygen-free copper, fine aluminium and pure nickel are melted down at 1480 ℃, at cooling water inflow is 1300L/h, cooling water temperature is 28 ℃, when vacuum is 0.1Pa, adopts glass tube down-drawing to prepare the tubing of external diameter 10mm, wall thickness 1.5mm with the casting speed of 38mm/min on continuous directional solidification apparatus.Prepared tubing surfaces externally and internally light, inside is continuous cylindrical crystalline texture, the diameter of column crystal is about 0.25～1.5mm.
Embodiment 2: the Cu-7wt%Al aluminium bronze tubing of external diameter 12mm, wall thickness 1.8mm.Adopting copper content is that 99.9% oxygen-free copper and aluminium content are that 99.9% fine aluminium is a raw material, and wherein the mass fraction of aluminium content is 7%.At first oxygen-free copper and fine aluminium are melted down at 1220 ℃, at cooling water inflow is 900L/h, cooling water temperature is 30 ℃, when vacuum is 0.5Pa, adopts glass tube down-drawing to prepare the tubing of external diameter 12mm, wall thickness 1.8mm with the casting speed of 100mm/min on continuous directional solidification apparatus.Prepared tubing surfaces externally and internally light, inside is continuous cylindrical crystalline texture, the diameter of column crystal is about 0.5～1.8mm.
High aluminium copper precision tube to above embodiment continuous directional solidification preparation carries out mechanical property test, tests on the MTS Material Testing Machine, and tensile sample is according to GB/T 228-2002 standard processing (getting proportionality coefficient is 5.65).Result of the test is as shown in table 1.
Table 1
| Embodiment | Tensile strength (MPa) | Percentage elongation (%) |
| Embodiment 1 | 540 | 13.7 |
| Embodiment 2 | 210 | 76 |
Claims (2)
1, a kind of short process high efficiency preparation method of high aluminium coppe alloy precision pipe material adopts the preparation of continuous directional solidification method to have the single crystal organization or the high aluminium copper precision tube of continuous cylindrical crystalline texture along its length; Technology is: with the copper alloy casting ingot of high aluminium content or oxygen-free copper, fine aluminium (for the alloy more than the ternary, then also comprise other alloying elements, as nickel) 1150～1550 ℃ of fusings down, the continuous directional solidification casting speed is 1～200mm/min, cooling water inflow is 100～1300L/h, cooling water temperature is 20～30 ℃, and vacuum is 0.1～2Pa, the high aluminium content copper alloy precision tube of preparation external diameter 8～40mm, wall thickness 1～5mm.
2, in accordance with the method for claim 1, it is characterized in that continuous directional solidification adopts glass tube down-drawing, horizontal casting method or up-drawing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 200710062679 CN100999011A (en) | 2007-01-12 | 2007-01-12 | Short process high efficiency preparation method of high aluminium coppe alloy precision pipe material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200710062679 CN100999011A (en) | 2007-01-12 | 2007-01-12 | Short process high efficiency preparation method of high aluminium coppe alloy precision pipe material |
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| CN100999011A true CN100999011A (en) | 2007-07-18 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102154599A (en) * | 2011-03-17 | 2011-08-17 | 北京科技大学 | Short-flow high-efficiency production method for white brass alloy pipes |
| CN102313757A (en) * | 2011-09-21 | 2012-01-11 | 镇江忆诺唯记忆合金有限公司 | Melt superheat holding time of refining directional solidification structure of aluminum copper alloy |
| CN102489535A (en) * | 2011-11-29 | 2012-06-13 | 北京科技大学 | Method for preparing and processing cupronickel capillary with high efficiency |
| CN102601325A (en) * | 2012-04-16 | 2012-07-25 | 金川集团有限公司 | Method for preparing copper-aluminum composite bar by means of horizontally continuous casting |
| CN104550789A (en) * | 2015-01-22 | 2015-04-29 | 江西理工大学 | Continuous unidirectional solidification preparation method of high-purity oxygen-free copper rod |
| CN104889353A (en) * | 2015-05-15 | 2015-09-09 | 江苏华旺科技有限公司 | Continuous casting process of nickel coated copper composite materials |
| CN112355078A (en) * | 2020-10-26 | 2021-02-12 | 有研工程技术研究院有限公司 | Aluminum oxide dispersion strengthened copper alloy pipe and preparation method and application thereof |
-
2007
- 2007-01-12 CN CN 200710062679 patent/CN100999011A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102154599A (en) * | 2011-03-17 | 2011-08-17 | 北京科技大学 | Short-flow high-efficiency production method for white brass alloy pipes |
| CN102313757A (en) * | 2011-09-21 | 2012-01-11 | 镇江忆诺唯记忆合金有限公司 | Melt superheat holding time of refining directional solidification structure of aluminum copper alloy |
| CN102489535A (en) * | 2011-11-29 | 2012-06-13 | 北京科技大学 | Method for preparing and processing cupronickel capillary with high efficiency |
| CN102601325A (en) * | 2012-04-16 | 2012-07-25 | 金川集团有限公司 | Method for preparing copper-aluminum composite bar by means of horizontally continuous casting |
| CN104550789A (en) * | 2015-01-22 | 2015-04-29 | 江西理工大学 | Continuous unidirectional solidification preparation method of high-purity oxygen-free copper rod |
| CN104889353A (en) * | 2015-05-15 | 2015-09-09 | 江苏华旺科技有限公司 | Continuous casting process of nickel coated copper composite materials |
| CN112355078A (en) * | 2020-10-26 | 2021-02-12 | 有研工程技术研究院有限公司 | Aluminum oxide dispersion strengthened copper alloy pipe and preparation method and application thereof |
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