CN102628117A - Nano-modification copper alloy bar used in aerospace industry, and preparation method thereof - Google Patents
Nano-modification copper alloy bar used in aerospace industry, and preparation method thereof Download PDFInfo
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- CN102628117A CN102628117A CN2012101237937A CN201210123793A CN102628117A CN 102628117 A CN102628117 A CN 102628117A CN 2012101237937 A CN2012101237937 A CN 2012101237937A CN 201210123793 A CN201210123793 A CN 201210123793A CN 102628117 A CN102628117 A CN 102628117A
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Abstract
The invention relates to a nano-modification copper alloy bar used in aerospace industry. The copper alloy bar comprises, by mass, 0.5-1.5% of carbon, wherein the carbon has a grain diameter less than 70 mu m, 1-5% of nickel, wherein the nickel has a grain diameter of 40-60 nm, 1-3% of titanium oxide, wherein the titanium oxide has a grain diameter of 20-40 nm, and the balance being copper, wherein the copper has a grain diameter less than 70 mu m. The invention further relates to a method for preparing the nano-modification copper alloy bar used in aerospace industry. The nano-modification copper alloy bar used in aerospace industry prepared in the invention has a high rate of finished products, stable performance, and few internal defects, and can be widely used in the manufacture of copper alloy bars.
Description
Technical field
The present invention relates to field of metallurgy, particularly a kind of aerospace are with nano modification copper alloy rod and preparation method thereof.
Background technology
QSn6.5-0.1 soft tin-phosphor bronze is one of used important materials of field of aerospace technology, and its chemical composition is: 6.0%～7.0% tin ,≤0.02% lead, 0.10%～0.25% phosphorus ,≤0.002% aluminium ,≤0.05% iron ,≤0.002% silicon ,≤0.002% antimony ,≤0.002% bismuth and other impurity.QSn6.5-0.1 soft tin-phosphor bronze has high intensity, elasticity, wear resistance and diamagnetism, hot good with cold conditions overdraft processibility, electrical spark is had higher non-flame properties; Can weld and soldering; Machinability is good, and therefore superperformance such as anti-corrosion in atmosphere, fresh water is mainly used in and makes the required spring of aerospace field and spring contact plate, wear part and the diamagnetic part of good conductivity; Like gear, brush box, vibrating plate, contactor or the like; But in its production process, the extrusion process in the production technique tends to cause bar to produce defectives such as cracking, causes the yield rate of product lower.
Summary of the invention
The purpose of this invention is to provide a kind of various performances that satisfy request for utilization that not only have traditional QSn6.5-0.1 tin-phosphor bronze rod; Can replace QSn6.5-0.1 and be applied in the field of aerospace technology, and the aerospace that bar did not produce or seldom produced defectives such as cracking in the extrusion process in production process are with nano modification copper alloy rod and preparation method thereof.
In order to realize the foregoing invention purpose, the technical scheme that the present invention adopts is following:
A kind of aerospace are with nano modification copper alloy rod, and are composed of the following components: account for the carbon of the 0.5-1.5% of copper alloy rod total mass, account for the nickel of the 1-5% of copper alloy rod total mass, account for the titanium oxide of the 1-3% of copper alloy rod total mass, surplus is a copper.
Further, the particle diameter of said carbon＜70 μ m.
Further, the particle diameter of said nickel is 40～60nm.
Further, the particle diameter of said titanium oxide is 20～40nm.
Further, the particle diameter of said copper＜70 μ m.
A kind of aerospace may further comprise the steps with the preparation method of nano modification copper alloy rod:
Step 1: respectively the powder particle of carbon, nickel, titanium oxide, copper is put into ball mill according to proportioning and clash into, grind and stir, to obtain tissue and composition uniform alloy powder;
Step 2: the powdered alloy that step 1 is obtained is heated to 1450～1550 ℃, until completely melted liquid alloy is incubated to 1530 ℃;
Step 3: the liquid alloy that will melt fully fully stirs, and on liquid alloy, covers then to prevent the Graphite Powder 99 of its oxidation;
Step 4: carry out casting operation, obtain alloy pig;
Step 5: the alloy pig that step 4 is obtained is inserted in the vacuum annealing furnace and is annealed, and the alloy pig after will annealing then takes out and place the air naturally cooling from vacuum annealing furnace;
Step 6: the alloy pig extruding is alloy bar, and cuts the alloy bar of only alloy bar being processed trimmed size through a system stretching, stress annealing and two.
The thickness of the Graphite Powder 99 that on liquid alloy, covers in the said step 3 further, is 10～12mm.
Further, the casting operation in the said step 4 is specially horizontal continuous shaking casting.
Further, the annealing temperature in the said step 5 is 410～460 ℃, and annealing time is 5～6 hours.
Further, the temperature of the stress annealing in the said step 6 is 350～380 ℃.
The present invention is owing to adopt above technical scheme; It has the following advantages: 1, the present invention has adopted the nano modification copper alloy rod that a kind of new proportioning by carbon, nickel, titanium oxide and copper is processed; The tensile strength of this copper alloy rod is 800～950MPa, and unit elongation is 8%, and hardness is 220HB; Therefore copper alloy rod of the present invention not only has the various performances of traditional QSn6.5-0.1 tin-phosphor bronze rod; It can replace traditional QSn6.5-0.1 tin-phosphor bronze rod fully, and the present invention greatly reduces crack defect appears in copper alloy rod easily in extrusion process probability, has greatly improved the product qualified rate of copper alloy rod.2, the raw materials used particle diameter of making copper alloy rod of the present invention is respectively: the particle diameter of the particle diameter of carbon＜70 μ m, nickel is that the particle diameter of 40～60nm, titanium oxide is the particle diameter＜70 μ m of 20～40nm, copper; And above-mentioned powder particle inserted in the ball mill clash into, grind and stir; Not only structural constituent is even for the copper alloy rod that then makes; And the crystal grain of its element is tiny, and the copper alloy rod of making is nano modification copper alloy rod, and its stable performance and subsurface defect are few.So the aerospace that the present invention makes are few with nano modification copper alloy rod yield rate height, stable performance and subsurface defect, can be widely used in the manufacturing of copper alloy rod, and this copper alloy rod can be widely used in the aerospace field.
Description of drawings
Fig. 1 is the preparation method schemas of aerospace of the present invention with nano modification copper alloy rod.
Embodiment
Below in conjunction with embodiment the present invention is described further, but and unrestricted range of application of the present invention.
Embodiment 1
Aerospace are with nano modification copper alloy rod, and its component is: the carbon of 0.5% (weight percent), granularity are 40 μ m; The nickel of 1% (weight percent), granularity are 40nm; The titanium oxide of 1% (weight percent), granularity 20nm; Surplus is a copper, and granularity is 40 μ m.
As shown in Figure 1, above-mentioned nano modification copper alloy rod prepares through following steps:
Step 1: respectively the powder particle of carbon, nickel, titanium oxide, copper is put into high energy ball mill according to proportioning; Rotation or vibrations with high energy ball mill make hard sphere clash into, grind and stir the powder particle of carbon, nickel, titanium oxide, copper, just can obtain tissue and composition uniform alloy powder;
Step 2: the powdered alloy that step 1 is obtained places in the main frequency furnace, is heated to 1450～1550 ℃, until completely melted liquid alloy is incubated to 1530 ℃;
Step 3: the liquid alloy that will melt fully with the graphite instrument fully stirs, and on liquid alloy, covers high purity flaky graphite powder then to prevent its oxidation, and cladding thickness is 10～12mm;
Step 4: adopt horizontal continuous shaking casting, being cast as external diameter is that Φ 145mm, length are the solid alloy pig of 410mm;
Step 5: solid alloy pig is positioned over annealed in the box type vacuum lehre 5～6 hours, annealing temperature is 410～460 ℃, and the alloy pig after will annealing then takes out from the box type vacuum lehre, places the air naturally cooling;
Step 6: the alloy pig extruding after the extrusion machine that employing hydraulic pressure is 1800 tons will heat is the alloy bar of Φ 45mm for external diameter; Through system head and to stretch external diameter be that the external diameter of the alloy bar of Φ 45mm is stretched as Φ 40mm; Adopt 350～380 ℃ bright stress annealing then, after annealing is accomplished the alloy bar of then processing trimmed size is only cut at two of alloy bar;
Step 7: packing warehouse-in.
Embodiment 2
Aerospace are with nano modification copper alloy rod, and its component is: the carbon of 1.5% (weight percent), granularity are 60 μ m; The nickel of 5% (weight percent), granularity are 60nm; The titanium oxide of 3% (weight percent), granularity 40nm; Surplus is a copper, and granularity is 60 μ m.
Above-mentioned aerospace with nano modification copper alloy rod through making with embodiment 1 identical operation.
Embodiment 3
Aerospace are with nano modification copper alloy rod, and its component is: the carbon of 1.0% (weight percent), granularity are 50 μ m; The nickel of 3% (weight percent), granularity are 50nm; The titanium oxide of 2% (weight percent), granularity 30nm; Surplus is a copper, and granularity is 50 μ m.
Above-mentioned aerospace with nano modification copper alloy rod through making with embodiment 1 identical operation.
From stockyard, randomly draw copper alloy rod according to the invention and detect, detected result is: tensile strength is 800～950MPa, and unit elongation is 8%, and hardness is 220HB.The tensile strength of traditional Q Sn6.5-0.1 be 350～800MPa, unit elongation be 7.4～70% and hardness be 70～200HB.Detection numerical value such as the following table one of copper alloy rod of the present invention and traditional Q Sn6.5-0.1.
Table one
| The trade mark | Tensile strength (MPa) | Unit elongation (%) | Hardness (HB) | |
| Copper alloy rod of the present invention | CuC1Ni3TiO 22 | ?800～950 | 8 | 220 |
| Traditional tin-phosphor bronze | QSn6.5-0.1 | ?350～800 | 7.4～70 | 70～200 |
Can find out by last table one; Compare with traditional QSn6.5-0.1 tin-phosphor bronze rod; The numerical value of tensile strength, unit elongation and the hardness of copper alloy rod of the present invention is all bigger; Therefore copper alloy rod of the present invention can replace traditional QSn6.5-0.1 tin-phosphor bronze rod fully, and it is lower to occur the probability of crackle in the extrusion process of copper alloy rod in production technique, and the finished product rate is higher.
The above is merely preferred embodiment of the present invention, is not to be used for limiting practical range of the present invention; If do not break away from the spirit and scope of the present invention, the present invention is made amendment or is equal to replacement, all should be encompassed in the middle of the protection domain of claim of the present invention.
Claims (10)
1. aerospace are with nano modification copper alloy rod; It is characterized in that, composed of the following components: as to account for the carbon of the 0.5-1.5% of copper alloy rod total mass, account for the nickel of the 1-5% of copper alloy rod total mass; Account for the titanium oxide of the 1-3% of copper alloy rod total mass, surplus is a copper.
2. aerospace according to claim 1 is characterized in that the particle diameter of said carbon＜70 μ m with nano modification copper alloy rod.
3. aerospace according to claim 1 is characterized in that with nano modification copper alloy rod the particle diameter of said nickel is 40～60nm.
4. aerospace according to claim 1 is characterized in that with nano modification copper alloy rod the particle diameter of said titanium oxide is 20～40nm.
5. aerospace according to claim 1 is characterized in that the particle diameter of said copper＜70 μ m with nano modification copper alloy rod.
6. each described aerospace is characterized in that with the preparation method of nano modification copper alloy rod in the claim 1～5, may further comprise the steps:
Step 1: respectively the powder particle of carbon, nickel, titanium oxide, copper is put into ball mill according to proportioning and clash into, grind and stir, to obtain tissue and composition uniform alloy powder;
Step 2: the powdered alloy that step 1 is obtained is heated to 1450～1550 ℃, until completely melted liquid alloy is incubated to 1530 ℃;
Step 3: the liquid alloy that will melt fully fully stirs, and on liquid alloy, covers then to prevent the Graphite Powder 99 of its oxidation;
Step 4: carry out casting operation, obtain alloy pig;
Step 5: the alloy pig that step 4 is obtained is inserted in the vacuum annealing furnace and is annealed, and the alloy pig after will annealing then takes out and place the air naturally cooling from vacuum annealing furnace;
Step 6: the alloy pig extruding is alloy bar, and cuts the alloy bar of only alloy bar being processed trimmed size through a system stretching, stress annealing and two.
7. aerospace according to claim 6 is characterized in that with the preparation method of nano modification copper alloy rod the thickness of the Graphite Powder 99 that on liquid alloy, covers in the said step 3 is 10～12mm.
8. aerospace according to claim 6 is characterized in that with the preparation method of nano modification copper alloy rod the casting operation in the said step 4 is specially horizontal continuous shaking casting.
9. aerospace according to claim 6 is characterized in that with the preparation method of nano modification copper alloy rod the annealing temperature in the said step 5 is 410～460 ℃, and annealing time is 5～6 hours.
10. aerospace according to claim 6 is characterized in that with the preparation method of nano modification copper alloy rod the temperature of the stress annealing in the said step 6 is 350～380 ℃.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102828063A (en) * | 2012-09-18 | 2012-12-19 | 苏州天兼金属新材料有限公司 | Novel lead-free environment-friendly high-strength wear-resistant copper-base alloy bar and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1305017A (en) * | 2001-01-18 | 2001-07-25 | 刘伟 | Copper-based composition used as electric contacts |
| CN102134664A (en) * | 2010-12-20 | 2011-07-27 | 昆明理工大学 | Uniformly-dispersed particle reinforced metal-based composite material and preparation method thereof |
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2012
- 2012-04-25 CN CN 201210123793 patent/CN102628117B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1305017A (en) * | 2001-01-18 | 2001-07-25 | 刘伟 | Copper-based composition used as electric contacts |
| CN102134664A (en) * | 2010-12-20 | 2011-07-27 | 昆明理工大学 | Uniformly-dispersed particle reinforced metal-based composite material and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102828063A (en) * | 2012-09-18 | 2012-12-19 | 苏州天兼金属新材料有限公司 | Novel lead-free environment-friendly high-strength wear-resistant copper-base alloy bar and preparation method thereof |
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