CN103667770B - A kind of precipitation hardenable copper alloy - Google Patents
A kind of precipitation hardenable copper alloy Download PDFInfo
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- CN103667770B CN103667770B CN201310615751.XA CN201310615751A CN103667770B CN 103667770 B CN103667770 B CN 103667770B CN 201310615751 A CN201310615751 A CN 201310615751A CN 103667770 B CN103667770 B CN 103667770B
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Abstract
Present invention obtains a kind of precipitation hardenable copper alloy having excellent mechanical performance and conductivity concurrently, particular by the proportioning optimizing each alloying element of ferronickel phosphor-copper precipitation strength type alloy system, and with the addition of Zn, Sn alloying element in right amount, control annealing temperature, annealing time and cold-rolling process parameter simultaneously, shorten heat treatment time, improve production efficiency.
Description
Technical field
The present invention relates to the technical field of alloy, a kind of precipitation hardenable copper alloy having excellent mechanical performance and conductivity concurrently is particularly provided.
Background technology
Cu alloy material has excellent physical strength and good conductivity, in addition production cost relative moderate, is thus widely used in the manufacture field such as electrode contact, horn, engine commutator, electronics telecommunication connector, terminal, rly. and lead frame.
But along with the Industrial products such as unicircuit are to the trend of high-density, miniaturization, multifunction development, for based on the intensity of copper alloy of material, conductivity it is also proposed more and more higher requirement.Excellent physical strength and the requirements at the higher level of conductivity are had concurrently for copper alloy, precipitation hardening is a kind of method comparatively effectively improving copper alloy performance, the particularly copper alloy of copper nickel phosphorus system, its precipitation strengthening capacity is comparatively outstanding, obtain more investigation and application, such as, disclose a kind of precipitation hardenable copper alloy of copper nickel phosphorus system with sharp document CN200880126328.0.
But existing precipitation hardenable copper alloy all needs the capable long thermal treatment of Zhong to improve alloy property, thus be met the copper alloy of requirement, just include the thermal treatment copper alloy Zhong after cold rolling being walked to few 2 hours in such as, preparation section in CN200880126328.0.Such preparation technology Ji but in production efficiency existing defects, cost is also Ji economy.
Summary of the invention
Namely object of the present invention is to provide an Albatra metal-to form precipitation hardenable copper alloy that is reasonable, excellent performance.
Technical scheme of the present invention is achieved in that
One, prepare burden: 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 join for Cu and the evitable impurity of Ji and get raw material, wherein must meet (Ni+Fe): P=3-3.5, the powder of described raw material is purity to be 99.99% oxygen free copper and purity be each alloying element of 99.9%;
Two, melting: by the raw material capable melting of Zhong in high frequency furnace under nitrogen protection atmosphere prepared, described melting is for first inserting in stove by Cu, Zn, Sn mixing, temperature is risen to 1230-1250 DEG C and Keep agitation melt fully to mix, add Ni, Fe and P subsequently, continue to be warming up to 1280-1300 DEG C and be incubated the capable melting of Zhong, after melting, watering casting copper alloys ingot;
Three, hot rolling: after copper alloy ingot is heated to 950-980 DEG C, the capable hot rolling of Zhong is to desired thickness, and finishing temperature control is at 730-750 DEG C;
Four, cold rolling processing: by the cold rolling processing of the copper alloy of hot rolling Zhong capable 70-75% draft after the scale removal of milling face;
Five, anneal+cold rolling processing: the copper alloy cold rolling processing obtained is under the condition of 570-600 DEG C after anneal 1.5-2min, the cold rolling processing of Zhong capable 40-45% draft again, after reducing annealing temperature to 530-550 DEG C again anneal 1.5-2min subsequently, the cold rolling processing of Zhong capable 40-45% draft again, subsequently after 530-550 DEG C again anneal 1.5-2min, the cold rolling of Zhong capable 40-45% draft is worked into desired thickness again, is finally precipitated sclerotic type copper alloy at 380-400 DEG C of condition annealing 2-3min.
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, finally the 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 that first time anneals is 580 DEG C, and annealing time is 1.8min; Rear twice annealed temperature is 540 DEG C, and annealing time is 1.8min; The temperature of final annealing is 380 DEG C, 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: have selected ferronickel phosphor-copper precipitation strength type alloy system, optimize the proportioning of each alloying element, and with the addition of Zn, Sn alloying element in right amount, control annealing temperature, annealing time and cold-rolling process parameter, shorten heat treatment time, improve production efficiency, obtain the precipitation hardenable copper alloy having excellent mechanical performance and conductivity concurrently simultaneously.
Embodiment
Embodiment 1-6, and comparative example 1*-8*:
One, prepare burden: match well with the weight percent shown in table 1 and get raw material, the powder of described raw material is purity to be 99.99% oxygen free copper and purity be each alloying element of 99.9%;
Two, melting: by the raw material capable melting of Zhong in high frequency furnace under nitrogen protection atmosphere prepared, described melting is for first inserting in stove by Cu, Zn, Sn mixing, temperature is risen to 1240 DEG C and Keep agitation melt fully to mix, add Ni, Fe and P subsequently, continue to be warming up to 1300 DEG C 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 DEG C, the capable 6 passage hot rollings of Zhong are to 8mm, and finishing temperature control is at 740 DEG C;
Four, cold rolling processing: by the cold rolling processing of capable 75% draft of the copper alloy of hot rolling Zhong after the scale removal of milling face;
Five, anneal+cold rolling processing: the thick copper alloy of the 2mm cold rolling processing obtained is under the condition of 570 DEG C after anneal 1.5min, the cold rolling processing of capable 40% draft of Zhong again, reduce annealing temperature to 530 subsequently DEG C again after anneal 1.5min, the cold rolling processing of capable 40% draft of Zhong again, subsequently after 530 DEG C again anneal 1.5min, capable the cold rolling of 40% draft of Zhong is worked into desired thickness again, is finally precipitated sclerotic type copper alloy at 380 DEG C of condition annealing 2min.
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 Drawing abillity severe exacerbation will be made, its addition must be limited in less than 0.12%, but also Ji very little, otherwise can will be difficult to the object reaching precipitation strength, therefore at least will 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 being unprofitable to intensity of ratio causes the deterioration of processing characteristics and conductivity on the contrary, and ratio is too small, is difficult to the demand forming composite precipitation strengthening precipitated phase.Particularly preferred, alloying element percentage composition is 0.17Ni, 0.17Fe, 0.1P.Zn and Sn also plays great role for the raising of intensity in alloy system of the present invention, but too high addition Ji can be proportional raising intensity, processing characteristics can be worsened on the contrary, too low addition then produces the corresponding effect of Ji, particularly preferred, coordinate the Zn of the interpolation 0.12% and Sn of 0.28%.
Embodiment 7-10, and comparative example 9*-12*, embodiment 2 is not identical for the composition of alloy, annealing temperature and the time (A) for the first time, the annealing temperature of latter twice and time (B), the temperature and time (C) of final annealing, the preparation technology parameters such as the draft of cold rolling processing are see table 2.
Table 2
As shown in Table 2, anneal first, the temperature Ji of process annealing and final annealing should be too high, otherwise reach cause the intensity of copper alloy at Ji to requiring, but also Ji can be too low, too low play a part Ji to annealing, causing processing characteristics and conductivity to reach Ji to requiring, considering the impact of middle cold rolling processing simultaneously, the temperature of annealing first should be set to the temperature higher than process annealing, it is low that the temperature of final annealing then should be tried one's best; And annealing time also should be moderate, long annealing time Ji but be unprofitable to the significantly raising of processing characteristics and conductivity, also can cause the deterioration of intensity, be also simultaneously very Ji profit in production efficiency, production energy consumption, too short annealing time then but Ji to the object of modification of annealing; Particularly preferred, the temperature of annealing first is 580 DEG C, and annealing time is 1.8min; The temperature of process annealing is 540 DEG C, and annealing time is 1.8min; The temperature of final annealing is 380 DEG C, and annealing time is 2min.The draft of cold rolling processing needs to control at 40-45%, and too high draft can cause the deterioration of processing characteristics and conductivity, and too low draft then plays Ji and separates out to increase strengthening phase, compensates the object of anneal intensity loss.
To sum up, the present invention is by the constituent optimization of ferronickel phosphor-copper precipitation strength type alloy system, and conservative control annealing temperature, annealing time and cold-rolling process parameter, determine the alloying constituent of mating the most and complete processing, shorten heat treatment time, improve production efficiency, obtain the precipitation hardenable copper alloy having excellent mechanical performance and conductivity concurrently simultaneously.
Claims (5)
1. have a precipitation hardenable copper alloy for excellent mechanical performance and conductivity concurrently, it is characterized in that being prepared by following preparation process:
One, prepare burden: take weight percent as 0.17Ni, 0.17Fe, 0.1P, 0.12Zn, 0.28Sn, surplus for Cu and inevitably impurity join and get raw material, the powder of described raw material is purity to be 99.99% oxygen free copper and purity be each alloying element of 99.9%;
Two, melting: the raw material prepared is carried out melting under nitrogen protection atmosphere in high frequency furnace, described melting is for first inserting in stove by Cu, Zn, Sn mixing, temperature is risen to 1230-1250 DEG C and Keep agitation melt fully to mix, add Ni, Fe and P subsequently, continue to be warming up to 1280-1300 DEG C and be incubated and carry out melting, after melting, water casting copper alloys ingot;
Three, hot rolling: carry out hot rolling after copper alloy ingot is heated to 950-980 DEG C to desired thickness, finishing temperature control is at 730-750 DEG C;
Four, cold rolling processing: the cold rolling processing copper alloy of hot rolling being carried out after the scale removal of milling face 70-75% draft;
Five, anneal+cold rolling processing: the copper alloy cold rolling processing obtained is under the condition of 570-600 DEG C after anneal 1.5-2min, again carry out the cold rolling processing of 40-45% draft, after reducing annealing temperature to 530-550 DEG C again anneal 1.5-2min subsequently, carry out the cold rolling processing of 40-45% draft again, subsequently after 530-550 DEG C again anneal 1.5-2min, carry out the cold rolling of 40-45% draft again and be worked into desired thickness, be finally precipitated sclerotic type copper alloy at 380-400 DEG C of condition annealing 2-3min.
2. copper alloy 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, and finally the cold rolling desired thickness that is worked into is 0.2-0.4mm.
4. copper alloy according to claim 1, is characterized in that: in anneal+cold rolling processing, and the temperature that first time anneals is 580 DEG C, and annealing time is 1.8min; Rear twice annealed temperature is 540 DEG C, and annealing time is 1.8min; The temperature of final annealing is 380 DEG C, and annealing time is 2min.
5. copper alloy according to claim 1, is characterized in that: in anneal+cold rolling processing, and the draft of cold rolling processing is 43%.
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| CN201310615751.XA CN103667770B (en) | 2013-11-27 | 2013-11-27 | A kind of precipitation hardenable copper alloy |
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| CN100425717C (en) * | 2006-08-16 | 2008-10-15 | 苏州有色金属加工研究院 | Copper alloy for lead-wire frame and its production |
| JP5539055B2 (en) * | 2010-06-18 | 2014-07-02 | 株式会社Ｓｈカッパープロダクツ | Copper alloy material for electric / electronic parts and method for producing the same |
| JP5715399B2 (en) * | 2010-12-08 | 2015-05-07 | 株式会社Ｓｈカッパープロダクツ | Copper alloy material for electrical and electronic parts |
| CN103131894B (en) * | 2013-03-15 | 2015-06-03 | 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 |
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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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