CN103667770A - Precipitation hardening type copper alloy - Google Patents
Precipitation hardening type copper alloy Download PDFInfo
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- CN103667770A CN103667770A CN201310615751.XA CN201310615751A CN103667770A CN 103667770 A CN103667770 A CN 103667770A CN 201310615751 A CN201310615751 A CN 201310615751A CN 103667770 A CN103667770 A CN 103667770A
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Abstract
The invention obtains a precipitation hardening type copper alloy with an excellent mechanical property and conductivity. To be specific, the matching of alloying elements of a precipitation hardening type Ni-Fe-P-Cu alloy system is optimized, Zn and Sn alloying elements are appropriately added, and meanwhile, the annealing temperature, the annealing time and cold rolling technological parameters are controlled, so that the heat treatment time is shortened, and the production efficiency is improved.
Description
Technical field
The present invention relates to the technical field of alloy, a kind of precipitation hardenable copper alloy that has excellent mechanical property and conductivity concurrently is particularly provided.
Background technology
Cu alloy material has excellent physical strength and good conductivity, in addition production cost is relatively cheap, thereby is widely used in the manufacture field such as electrode contact, horn, engine commutator, electronics telecommunication connector, terminal, rly. and lead frame.
Yet along with the trend of the Industrial products such as unicircuit to high-density, miniaturization, multifunction development, for intensity, the conductivity of the copper alloy as base mateiral, more and more higher requirement has also been proposed.For copper alloy, have excellent physical strength and the requirements at the higher level of conductivity concurrently, precipitation hardening is a kind of method of comparatively effectively improving copper alloy performance, the copper alloy of copper nickel phosphorus system particularly, its precipitation hardening ability is comparatively outstanding, obtain more research and application, for example, disclosed a kind of precipitation hardenable copper alloy of copper nickel phosphorus system with sharp document CN200880126328.0.
Yet existing precipitation hardenable copper alloy all needs the capable long thermal treatment of Zhong to improve alloy property, thereby be met the copper alloy of requirement, for example, in the preparation section in CN200880126328.0, just comprised and the copper alloy Zhong after cold rolling has been walked to the thermal treatment of few 2 hours.Such preparation technology Ji but have defect in production efficiency is also Ji economy on cost.
Summary of the invention
Object of the present invention is to provide an Albatra metal-to form precipitation hardenable copper alloy reasonable, excellent performance.
Technical scheme of the present invention is achieved in that
One, batching: take weight percent as 0.15-0.2Ni, 0.15-0.2Fe, 0.09-0.12P, 0.1-0.15Zn, 0.25-0.3Sn, surplus as Cu and the evitable impurity of Ji is joined and got raw material, wherein must meet (Ni+Fe): P=3-3.5, described raw material is that purity is the powder of 99.99% oxygen free copper and purity each alloying element that is 99.9%;
Two, melting: by the raw material preparing capable melting of Zhong in high frequency furnace under nitrogen protection atmosphere, described melting is for first mixing Cu, Zn, Sn to insert in stove, temperature is risen to 1230-1250 ℃ and continue to stir melt and fully mix, add subsequently Ni, Fe and P, continue to be warming up to 1280-1300 ℃ and be incubated the capable melting of Zhong, after melting, water casting copper alloys ingot;
Three, hot rolling: after copper alloy ingot is heated to 950-980 ℃, the capable hot rolling of Zhong is to desired thickness, and finishing temperature is controlled at 730-750 ℃;
Four, cold rolling processing: by the cold rolling processing of the copper alloy of hot rolling capable 70-75% draft of Zhong after milling face scale removal;
Five, anneal+cold rolling processing: the copper alloy that cold rolling processing is obtained is under the condition of 570-600 ℃ after anneal 1.5-2min, the cold rolling processing of the capable 40-45% draft of Zhong again, reduce subsequently annealing temperature to 530-550 ℃ again after anneal 1.5-2min, the cold rolling processing of the capable 40-45% draft of Zhong again, subsequently at 530-550 ℃ again after anneal 1.5-2min, the cold rolling desired thickness that is worked into of the capable 40-45% draft of Zhong, is finally precipitated sclerotic type copper alloy at 380-400 ℃ of condition annealing 2-3min again.
Wherein preferred, described hot rolling is 1.5-2mm to desired thickness, and the passage of hot rolling is at least 6.
Zhong mono-step is preferred, and in described anneal+cold rolling processing, the final cold rolling desired thickness that is worked into is 0.2-0.4mm.
Zhong mono-step is preferred, and alloying element content is 0.17Ni, 0.17Fe, 0.1P.
Zhong mono-step is preferred, and the content of alloy element Zn is 0.12.
Zhong mono-step is preferred, and the content of alloying element Sn is 0.28.
Zhong mono-step is preferred, and in anneal+cold rolling processing, the temperature of annealing is 580 ℃ for the first time, and annealing time is 1.8min; Rear twice annealed temperature is 540 ℃, and annealing time is 1.8min; The temperature of final annealing is 380 ℃, and annealing time is 2min.
Zhong mono-step is preferred, and in anneal+cold rolling processing, the draft of cold rolling processing is 43%.
The invention has the advantages that: selected ferronickel phosphor-copper precipitation strength type alloy system, optimized the proportioning of each alloying element, and Zn, Sn alloying element have been added in right amount, control annealing temperature, annealing time and cold-rolling process parameter, shortened heat treatment time, improve production efficiency, obtained the precipitation hardenable copper alloy that has excellent mechanical property and conductivity concurrently simultaneously.
Embodiment
Embodiment 1-6, and comparative example 1*-8*:
One, batching: match well and get raw material with the weight percent shown in table 1, described raw material is that purity is the powder of 99.99% oxygen free copper and purity each alloying element that is 99.9%;
Two, melting: by the raw material preparing capable melting of Zhong in high frequency furnace under nitrogen protection atmosphere, described melting is for first mixing Cu, Zn, Sn to insert in stove, temperature is risen to 1240 ℃ and continue to stir melt and fully mix, add subsequently Ni, Fe and P, continue to be warming up to 1300 ℃ and be incubated the capable melting of Zhong, after melting, casting obtains Ф 30mm, the copper alloy ingot of long 200mm;
Three, hot rolling: after copper alloy ingot is heated to 960 ℃, the capable 6 passage hot rollings of Zhong are to 8mm, and finishing temperature is controlled at 740 ℃;
Four, cold rolling processing: by the cold rolling processing of the copper alloy of hot rolling capable 75% draft of Zhong after milling face scale removal;
Five, anneal+cold rolling processing: the thick copper alloy of 2mm that cold rolling processing is obtained is under the condition of 570 ℃ after anneal 1.5min, the cold rolling processing of capable 40% draft of Zhong again, reduce subsequently annealing temperature to 530 ℃ again after anneal 1.5min, the cold rolling processing of capable 40% draft of Zhong again, subsequently at 530 ℃ again after anneal 1.5min, the cold rolling desired thickness that is worked into of capable 40% draft of Zhong, is finally precipitated sclerotic type copper alloy at 380 ℃ of condition annealing 2min again.
Table 1
As shown in Table 1, the content of Ni, Fe, P and correlation proportion have very important impact for the over-all properties of copper alloy, first the interpolation Ji of P can be excessive, otherwise will make Drawing abillity severe exacerbation, its addition must be limited in below 0.12%, but also Ji can be very little, otherwise will be difficult to reach the object of precipitation strength, therefore at least add 0.09%; And in order to form Ni, Fe, P composite precipitation strengthening precipitated phase, should meet (Ni+Fe): P=3-3.5, the excessive raising that is unprofitable to intensity of ratio causes the deterioration of processing characteristics and conductivity on the contrary, the too small demand that is difficult to form composite precipitation strengthening precipitated phase of ratio.Particularly preferred, alloying element percentage composition is 0.17Ni, 0.17Fe, 0.1P.Zn and Sn also play great role for the raising of intensity in alloy system of the present invention, but too high addition the proportional raising intensity of Ji energy, can worsen processing characteristics on the contrary, corresponding effect that too low addition has produced Ji, particularly preferred, coordinate the Zn of interpolation 0.12% and 0.28% Sn.
Embodiment 7-10, and comparative example 9*-12*, the composition of alloy not embodiment 2 is identical, annealing temperature and time (A) for the first time, the annealing temperature of latter twice and time (B), the temperature and time of final annealing (C), the preparation technology parameters such as the draft of cold rolling processing are referring to table 2.
Table 2
As shown in Table 2, the temperature Ji of annealing first, process annealing and final annealing should be too high, otherwise the intensity that causes copper alloy is reached to Ji to requiring, but also Ji can be too low, too low play a part Ji to annealing, cause processing characteristics and conductivity to reach Ji to requiring, consider simultaneously centre cold rolling processing impact, the temperature setting of annealing first should be set to the temperature higher than process annealing, it is low that the temperature of final annealing should be tried one's best; And annealing time also should be moderate, long annealing time Ji but be unprofitable to processing characteristics and the significantly raising of conductivity, also can cause the deterioration of intensity, be also simultaneously Ji profit very in production efficiency, production energy consumption, too short annealing time but Ji to the object of annealing modification; Particularly preferred, the temperature of annealing is 580 ℃ first, and annealing time is 1.8min; The temperature of process annealing is 540 ℃, and annealing time is 1.8min; The temperature of final annealing is 380 ℃, and annealing time is 2min.The draft of cold rolling processing need to be controlled at 40-45%, and too high draft can cause the deterioration of processing characteristics and conductivity, and too low draft plays Ji and separates out to increasing strengthening phase, the object of compensation annealing loss of strength.
To sum up, the present invention is by the constituent optimization of ferronickel phosphor-copper precipitation strength type alloy system, and rationally control annealing temperature, annealing time and cold-rolling process parameter, determine alloying constituent and the complete processing of coupling the most, shortened heat treatment time, improve production efficiency, obtained the precipitation hardenable copper alloy that has excellent mechanical property and conductivity concurrently simultaneously.
Claims (8)
1. have a precipitation hardenable copper alloy for excellent mechanical property and conductivity concurrently, it is characterized in that being prepared by following preparation process:
One, batching: take weight percent as 0.15-0.2Ni, 0.15-0.2Fe, 0.09-0.12P, 0.1-0.15Zn, 0.25-0.3Sn, surplus as Cu and inevitably impurity join and get raw material, wherein must meet (Ni+Fe): P=3-3.5, described raw material is that purity is the powder of 99.99% oxygen free copper and purity each alloying element that is 99.9%;
Two, melting: the raw material preparing is carried out under nitrogen protection atmosphere in high frequency furnace to melting, described melting is for first mixing Cu, Zn, Sn to insert in stove, temperature is risen to 1230-1250 ℃ and continue to stir melt and fully mix, add subsequently Ni, Fe and P, continue to be warming up to 1280-1300 ℃ and be also incubated and carry out melting, after melting, water casting copper alloys ingot;
Three, hot rolling: carry out hot rolling to desired thickness after copper alloy ingot is heated to 950-980 ℃, finishing temperature is controlled at 730-750 ℃;
Four, cold rolling processing: the copper alloy of hot rolling is carried out after milling face scale removal to the cold rolling processing of 70-75% draft;
Five, anneal+cold rolling processing: the copper alloy that cold rolling processing is obtained is under the condition of 570-600 ℃ after anneal 1.5-2min, again carry out the cold rolling processing of 40-45% draft, reduce subsequently annealing temperature to 530-550 ℃ again after anneal 1.5-2min, carry out again the cold rolling processing of 40-45% draft, subsequently at 530-550 ℃ again after anneal 1.5-2min, carry out again the cold rolling desired thickness that is worked into of 40-45% draft, finally at 380-400 ℃ of condition annealing 2-3min, be precipitated sclerotic type copper alloy.
2. preparation method according to claim 1, is characterized in that: described hot rolling is 1.5-2mm to desired thickness, and the passage of hot rolling is at least 6.
3. copper alloy according to claim 1, is characterized in that: in described anneal+cold rolling processing, the final cold rolling desired thickness that is worked into is 0.2-0.4mm.
4. copper alloy according to claim 1, is characterized in that: alloying element content is 0.17Ni, 0.17Fe, 0.1P.
5. copper alloy according to claim 1, is characterized in that: the content of alloy element Zn is 0.12.
6. copper alloy according to claim 1, is characterized in that: the content of alloying element Sn is 0.28.
7. copper alloy according to claim 1, is characterized in that: in anneal+cold rolling processing, the temperature of annealing is 580 ℃ for the first time, and annealing time is 1.8min; Rear twice annealed temperature is 540 ℃, and annealing time is 1.8min; The temperature of final annealing is 380 ℃, and annealing time is 2min.
8. copper alloy according to claim 1, is characterized in that: in anneal+cold rolling processing, the draft of cold rolling processing is 43%.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1940104A (en) * | 2006-08-16 | 2007-04-04 | 苏州有色金属加工研究院 | Copper alloy for lead-wire frame and its production |
| JP2012001781A (en) * | 2010-06-18 | 2012-01-05 | Hitachi Cable Ltd | Copper alloy material for electric/electronic component, and method of manufacturing the same |
| JP2012122095A (en) * | 2010-12-08 | 2012-06-28 | Hitachi Cable Ltd | Copper alloy material for electric and electronic component |
| CN103131894A (en) * | 2013-03-15 | 2013-06-05 | 宁波金田铜业(集团)股份有限公司 | High-elasticity and high-conductivity copper alloy and production method thereof |
| CN103243231A (en) * | 2013-04-23 | 2013-08-14 | 中色（宁夏）东方集团有限公司 | High-strength high-conductivity copper base alloy and preparation method thereof |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1940104A (en) * | 2006-08-16 | 2007-04-04 | 苏州有色金属加工研究院 | Copper alloy for lead-wire frame and its production |
| JP2012001781A (en) * | 2010-06-18 | 2012-01-05 | Hitachi Cable Ltd | Copper alloy material for electric/electronic component, and method of manufacturing the same |
| JP2012122095A (en) * | 2010-12-08 | 2012-06-28 | Hitachi Cable Ltd | Copper alloy material for electric and electronic component |
| CN103131894A (en) * | 2013-03-15 | 2013-06-05 | 宁波金田铜业(集团)股份有限公司 | High-elasticity and high-conductivity copper alloy and production method thereof |
| CN103243231A (en) * | 2013-04-23 | 2013-08-14 | 中色（宁夏）东方集团有限公司 | High-strength high-conductivity copper base alloy and preparation method thereof |
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Inventor after: Yu Feng Inventor after: Liu Yu Inventor before: Mao Yangqun |
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Effective date of registration: 20170523 Address after: 335000 No. 16 Jinqiao Road, Yingtan hi tech Development Zone, Jiangxi, China Patentee after: Jiangxi Sino-Nuclear Copper Industrial Limited Company Address before: Yuyao City, Zhejiang province 315400 Ningbo City Yangming streets Liang Yan Cun Patentee before: YUYAO SHISEN COPPER FACTORY |
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Granted publication date: 20151111 Termination date: 20201127 |