CN102719694A - CuCrZr alloy material, preparation method thereof and method for preparing strips with same - Google Patents

CuCrZr alloy material, preparation method thereof and method for preparing strips with same Download PDF

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Publication number
CN102719694A
CN102719694A CN2012102081907A CN201210208190A CN102719694A CN 102719694 A CN102719694 A CN 102719694A CN 2012102081907 A CN2012102081907 A CN 2012102081907A CN 201210208190 A CN201210208190 A CN 201210208190A CN 102719694 A CN102719694 A CN 102719694A
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China
Prior art keywords
band
alloy material
milling
rolling
cucrzr alloy
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CN2012102081907A
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Inventor
汪明朴
夏承东
陈明勇
刘建设
刘敦伟
易志辉
贾延琳
陈畅
侯文武
刘清兰
詹飞
孟繁伟
徐斌
陈卫国
杨志龙
王之平
吕杰
王兴壮
骆启荣
马义兵
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TONGLING JINWEI COPPER CO Ltd
Central South University
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TONGLING JINWEI COPPER CO Ltd
Central South University
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Priority to CN2012102081907A priority Critical patent/CN102719694A/en
Publication of CN102719694A publication Critical patent/CN102719694A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a CuCrZr alloy material, and according to weight percentage, the CuCrZr alloy material consists of the following components: 0.30 to 0.70 percent of chromium, 0.05 to 0.20 percent of zirconium, 0.01 to 0.12 percent of nickel, 0.01 to 0.05 percent of silicon, 0.03 to 0.10 percent of magnesium, 0.10 to 0.50 percent of zinc and the balance of copper and inevitable impurities. The strength of the CuCrZr alloy material provided by the invention and strips made of the CuCrZr alloy material is higher than or equal to 580MPa, the conductivity of the CuCrZr alloy material and the strips is more than or equal to 78 percent IACS, the softening temperature of the CuCrZr alloy material and the strips is more than or equal to 500 DEG C, and therefore the CuCrZr alloy material and the strips have the properties of high strength, high conductivity and high temperature resistance.

Description

A kind of CuCrZr alloy material and its preparation method and this alloy material prepare the method for band
Technical field
The invention belongs to unicircuit and use the material field, be specifically related to the method that a kind of CuCrZr alloy material and its preparation method and this alloy material prepare band.
Background technology
Unicircuit is the core of hyundai electronics infotech, is the basis of electronics, computingmachine and information technological development.Blaster fuse frame material is one of unicircuit key part, plays the vital role that supports IC chip, protects inner member, connects external circuit and distribute work calories.VLSI requires its blaster fuse frame material tensile strength 550~600MPa, and specific conductivity is more than the 75%IACS, could guarantee the permanent stability when it carries.
Cu-Cr-Zr is that alloy has HS, high conductivity and good heat-resistant stability; It is the good material of making lead frame; But the Zr element in the alloy material is very easy to oxidation, and this alloy quenching sensitive is strong, causes its preparation cost high; Therefore on market, be not widely used, its research also mainly is in basic aspect.Because the gordian techniquies such as founding, on-line solution and quenching of big specification ingot casting fail to break through, make that Cu-Cr-Zr is the alloy strip steel rolled stock industrialization production of still being unrealized, such alloy strip steel rolled stock is whole dependence on import almost, have seriously restricted the development of China's electronics and information industry.Therefore be necessary to provide that a kind of production cost is low, technology simple, be fit to suitability for industrialized production, the better used for lead frame material of performance.
Summary of the invention
Primary and foremost purpose of the present invention provides a kind of HS, high conductivity and resistant to elevated temperatures CuCrZr alloy material.
The technical scheme that it adopted is: a kind of CuCrZr alloy material is characterized in that, by weight percentage; It comprises following component, 0.30~0.70% chromium, 0.05~0.20 zirconium; 0.01~0.12% nickel, 0.01~0.05% silicon, 0.03~0.10% magnesium; 0.10~0.50% zinc, surplus are copper and unavoidable impurities.
In the material provided by the present invention; The weight percent of each component is confirmed after applicant's TE; The intensity of alloy material, specific conductivity, softening temperature are all closely related with kind and its content of each component; The variation that exceeds above-mentioned scope of each component concentration, can make the undergoing mutation of alloy material influences the application of alloy material.
Second purpose of the present invention provides the preparation method of CuCrZr alloy material, comprises following operation:
1) founding: the copper of 88.54~97.26 weight parts and the cupronickel of 0.06~0.92 weight part are put into smelting furnace; Be heated to 1250 ℃~1280 ℃ fusings; After the fusing fully; Add the copper-magnesium alloy of throwing 0.14~0.56 weight part, the chromiumcopper of 2.50~8.75 weight parts, the copper zirconium alloy of 0.29~1.54 weight part and the cupro silicon of 0.06~0.36 weight part again, cast after stirring;
2) homogenizing is handled: the alloy body of gained is 920 ℃~960 ℃ insulation taking-up coolings after 4~6 hours down in will casting.
Adopt N in the copper and mickel melting process in the said founding 2The gas shiled melting.
Nickel content is 13~17% in the said cupronickel, and silicone content 14~18% in the said cupro silicon, and Mg content is 18~22% in the said copper-magnesium alloy, and chromium content is 8~12% in the said chromiumcopper, and zirconium content is 13~17% in the said copper zirconium alloy.
Can be when the smelting furnace interalloy begin to melt, omnidistance gas shield can adopt semicontinuous caster to cast during casting, and the alloy specification of casting can be 220 * 640 * Lmm; Homogenizing will guarantee when handling that the dendritic segregation in the alloy eliminates fully, and the temperature difference when alloy is come out of the stove is about 15 ℃.
The 3rd purpose of the present invention provides the method for preparing band of CuCrZr alloy material, comprises following operation:
3) hot rolling and quenching: hot CuCrZr alloy is carried out hot rolling on milling train, press quenching is cooled to about 60 ℃;
4) rolling: band after the milling is rolled into the strip that meets the product size requirement on milling train;
5) annealing: the band after rolling is carried out anneal, and control annealed temperature is 400 ℃~500 ℃, and annealing speed is 5~23m/min;
6) stretch-bending straightening: the strip after the anneal is carried out stretch-bending straightening handle on straightener, the flatness defect of conditioning strip material and minimizing band internal residual stress;
Described rolling process comprises following operation:
Roughing: the band after the milling processing is carried out roughing on reversable mill;
Ageing treatment: the band after the roughing placed be full of N 2Lehre in carry out ageing treatment one time, the control furnace temperature is 400 ℃~500 ℃, be incubated 4~8 hours, cools off then;
In roll: roll during the band after timeliness is carried out on middle milling train;
Secondary ageing is handled: the band after rolling in inciting somebody to action carries out anneal in lehre, and the control furnace temperature is 400 ℃~500 ℃, and annealing speed is 5~23m/min;
Finish rolling: the band after the secondary ageing processing is rolled into the strip that meets the product size requirement on finishing mill.
Before the said rolling operation milling being carried out on the surface of hot rolled band handles; Behind the said stretch-bending straightening band is carried out surface passivation and handle, and band is cut into the product of corresponding specification; Described milling machine operation is accomplished on two-sided Milling Machine, comprises that upper and lower surface and two sides to band carry out two-sided milling, and the milling amount on upper and lower surface is every 1 ± 0.3mm, and the side milling amount is every limit 2mm; Strip produces 0~3% unit elongation in the said stretch-bending straightening operation.
Described hot-rolled manipulation is at least once, and the thickness of strip after the hot rolling is 15~18mm, wherein last time hot rolling draught>50%, and finishing temperature is not less than 850 ℃.
Roll with ageing treatment in also being provided with after described secondary ageing is handled and operate; Thickness of strip after the said roughing is 1.0~1.8mm; In thickness of strip after rolling be 0.2~0.4mm.
Described operation 3)~6 when the last action step finishes, carry out the clot operation), carry out the uncoiling operation when next operation steps begins.
Adopt two-sided milling and repeatedly in roll, operations such as ageing treatment, stretch-bending straightening, make prepare lead frame have good plate shape and surface quality with band.
Intensity >=the 580Mpa of the band that CuCrZr alloy material provided by the invention and alloy material constitute, specific conductivity >=78%IACS, softening temperature >=500 ℃, have HS, high conductivity and resistance and high temperature resistance property.Can adopt hot rolling-press quenching technology during manufacturing, not handle the effect that also can reach solid solution thereby do not need to carry out separately solution hardening, improve production efficiency greatly, reduce production costs simultaneously, the band of production has good plate shape and surface quality.
Description of drawings
Fig. 1 is the preparation of CuCrZr alloy material and the process flow sheet of preparation alloy strip steel rolled stock thereof.
Embodiment
Wherein, embodiment 1,3,5 is the preparation of CuCrZr alloy material, embodiment 2,4,6 is the preparation of CuCrZr alloy strip steel rolled stock.
Embodiment 1
The copper of 94.13 weight parts and the cupronickel of 0.93 weight part nickel content 13% are put into smelting furnace; Be heated to 1250 ℃~1300 ℃ fusings; In the melting process in the stove omnidistance gas shield prevent that melt is oxidized; Add the copper-magnesium alloy of throwing 0.55 weight part Mg content 18% again after the fusing fully, treat to add again after copper-magnesium alloy melts fully the chromiumcopper of 2.5 weight part chromium content 12% and the copper zirconium alloy of 1.53 weight part zirconium content 13%, the zinc of 0.3 weight part, the cupro silicon of 0.06 weight part silicone content 18%, in semicontinuous caster, be cast as 170 * 620 * Lmm alloy cast ingot after the stirring fusing evenly; Then alloy cast ingot is incubated at the walking beam furnace internal heating; The control furnace temperature of heating furnace is 920 ℃~960 ℃, and soaking time is 4~6 hours, eliminates fully to guarantee the ingot casting dendritic segregation; The come out of the stove temperature difference ± 15 ℃ of ingot casting can obtain the CuCrZr alloy material after the cooling.
It is following to record in the alloy material that makes each components contents: nickel 0.12%, chromium 0.3%, zirconium 0.198%, silicon 0.02%, magnesium 0.01%, zinc 0.3%.
Embodiment 2
Alloy of ingot after the coming out of the stove among the embodiment 1 directly got into carry out multi-pass hot rolling back and forth on the two-roller reversible hot rolls; Finishing temperature is guaranteed more than 850 ℃; After directly being rolled to 15mm with>50% draught for the last time, directly being cooled to about 60 ℃ and batching at water spray on the hot rolling track.On two-sided Milling Machine, simultaneously the band after the hot rolling is carried out upper and lower surface successively after the hot-rolled coil uncoiling and two sides carry out milling, surperficial milling amount is every 1mm, and the side milling amount is every limit 2mm, clot then.With the roll coil of strip uncoiling after the milling, it is rough on reversible roughing mill, to carry out multi-pass, and thickness rolls 1.8mm from 13.0mm, and then clot.The roughing coil packed into carry out ageing treatment one time in the bell-jar lehre that contains protective atmosphere, 500 ℃ of air-supply coolings behind the insulation 6h down.When the band after ageing treatment is rolled down to the thickness 0.3mm left and right sides on the milling train in four rollers, place the air-cushion type lehre to carry out anneal again, annealing temperature is 400 ℃~500 ℃, and annealing speed is 5~15m/min.Secondary ageing is rolled down to final dimension with band after handling on 20 roller finishing mills, next in the air cushion lehre, carry out anneal again, and the control annealing temperature is 400 ℃, and annealing speed is 15m/min.Band after the annealing is checked, is put in storage after stretch-bending straightening, surface cleaning processing and full-automatic cutting and lining paper packing.
The CuCrZr that handles through above-mentioned processes is an alloy strip steel rolled stock, and intensity is 582MPa, and hardness is 189HV, specific conductivity 80.8%IACS, and annealing 1h post softening temperature (the annealing hardness value is the temperature of 85% correspondence of initial hardness) is greater than 550 ℃.
Embodiment 3
The copper of 90.29 weight parts and the cupronickel of 0.06 weight part nickel content 17% are put into smelting furnace, be heated to 1250 ℃~1300 ℃ fusings, adopt N in the melting process 2Protection prevents that metal melt is oxidized; Add the copper-magnesium alloy of throwing 0.15 weight part Mg content 22% again after the fusing fully; Treat to add again after copper-magnesium alloy melts fully the chromiumcopper of 8.7 weight part chromium content 8% and the copper zirconium alloy of 0.4 weight part zirconium content 17%, the zinc of 0.1 weight part, the cupro silicon of 0.3 weight part silicone content 14%; Stir fusing and evenly in semicontinuous caster, be cast as 170 * 620 * Lmm alloy cast ingot in the back, then alloy cast ingot is incubated at the walking beam furnace internal heating, the control furnace temperature of heating furnace is 920 ℃~960 ℃; Soaking time is 4~6 hours; Guaranteeing that the ingot casting dendritic segregation eliminates fully, the come out of the stove temperature difference ± 15 ℃ of ingot casting can obtain the CuCrZr alloy material after the cooling.
It is following to record in the alloy material that makes each components contents: nickel 0.01%, chromium 0.69%, zirconium 0.07%, silicon 0.02%, magnesium 0.05%, zinc 0.1%.
Embodiment 4
Alloy of ingot after the coming out of the stove among the embodiment 1 directly got into carry out multi-pass hot rolling back and forth on the two-roller reversible hot rolls; Finishing temperature guarantees more than 850 ℃, directly be rolled to 16mm with>50% draught for the last time after, directly be cooled to about 60 ℃ at water spray on the hot rolling track; Be transported on the two-sided Milling Machine through track then and carry out milling to upper and lower with side simultaneously; The surface milling amount is every 1mm, and the side milling amount is every limit 2mm, rolling then.With the roll coil of strip uncoiling after the milling, it is rough on reversible roughing mill, to carry out multi-pass, and thickness rolls 1.5mm from 15.0mm.The roughing coil packed into carry out ageing treatment one time in the bell-jar lehre that contains protective atmosphere, 470 ℃ of air-supply coolings behind the insulation 6h down.When the band after ageing treatment is rolled down to the thickness 0.2mm left and right sides on the milling train in four rollers, place the air cushion lehre to carry out anneal again, annealing temperature is 400 ℃~500 ℃, and annealing speed is 5~15m/min.Secondary ageing is rolled down to final dimension with band after handling on 20 roller finishing mills, next in the air cushion lehre, carry out anneal again, and the control annealing temperature is 400 ℃, and annealing speed is 15m/min.Band after the annealing is checked, is put in storage after stretch-bending straightening, surface cleaning processing and full-automatic cutting and lining paper packing.
The CuCrZr that handles through above-mentioned processes is an alloy strip steel rolled stock, and intensity is 594MPa, and hardness is 191HV, specific conductivity 79.6%IACS, and annealing 1h post softening temperature (the annealing hardness value is the temperature of 85% correspondence of initial hardness) is greater than 500 ℃.
Embodiment 5
The copper of 92.49 weight parts and the cupronickel of 0.54 weight part nickel content 15% are put into smelting furnace, be heated to 1250 ℃~1300 ℃ fusings, adopt N in the melting process 2Protection prevents that metal melt is oxidized; Add the copper-magnesium alloy of throwing 0.2 weight part Mg content 16% again after the fusing fully; Treat to add again after copper-magnesium alloy melts fully the chromiumcopper of 5 weight part chromium content 10% and the copper zirconium alloy of 0.9 weight part zirconium content 15%, the zinc of 0.5 weight part, the cupro silicon of 0.75 weight part silicone content 20%; Stir fusing and evenly in semicontinuous caster, be cast as 170 * 620 * Lmm alloy cast ingot in the back, then alloy cast ingot is incubated at the walking beam furnace internal heating, the control furnace temperature of heating furnace is 920 ℃~960 ℃; Soaking time is 4~6 hours; Guaranteeing that the ingot casting dendritic segregation eliminates fully, the come out of the stove temperature difference ± 10 ℃ of ingot casting can obtain the CuCrZr alloy material after the cooling.
It is following to record in the alloy material that makes each components contents: nickel 0.08%, chromium 0.50%, zirconium 0.13%, silicon 0.03%, magnesium 0.07%, zinc 0.5%.
Embodiment 6
Alloy of ingot after the coming out of the stove among the embodiment 1 directly got into carry out multi-pass hot rolling back and forth on the two-roller reversible hot rolls; Finishing temperature is guaranteed more than 850 ℃; After directly being rolled to 13mm with>50% draught for the last time, be cooled to about 60 ℃ at water spray on the hot rolling track immediately.Be transported on the two-sided Milling Machine through track then and carry out milling to upper and lower with side simultaneously, surperficial milling amount is every 1mm, and the side milling amount is every limit 2mm, rolling then.With the roll coil of strip uncoiling after the milling, it is rough on reversible roughing mill, to carry out multi-pass, and thickness rolls 1.0mm from 12.0mm, and then clot.The roughing coil packed into contain N 2Carry out one time ageing treatment in the bell-jar lehre of atmosphere, air-supply cooling behind insulation 6h under 450 ℃.When the band after ageing treatment is rolled down to the thickness 0.4mm left and right sides on the milling train in four rollers, place the air cushion lehre to carry out anneal again, annealing temperature is 400 ℃~500 ℃, and annealing speed is 5~15m/min.Secondary ageing is rolled down to final dimension with band after handling on 20 roller finishing mills, next in the air cushion lehre, carry out anneal again, and the control annealing temperature is 400 ℃, and annealing speed is 15m/min.Band after the annealing is checked, is put in storage after stretch-bending straightening, surface cleaning processing and full-automatic cutting and lining paper packing.
The CuCrZr that handles through above-mentioned processes is an alloy strip steel rolled stock, and intensity is 612MPa, and hardness is 198HV, specific conductivity 78.2%IACS, and annealing 1h post softening temperature (the annealing hardness value is the temperature of 85% correspondence of initial hardness) is greater than 500 ℃.

Claims (10)

1. a CuCrZr alloy material is characterized in that, by weight percentage; It comprises following component: 0.30~0.70% chromium, 0.05~0.20 zirconium, 0.01~0.12% nickel; 0.01~0.05% silicon; 0.03~0.10% magnesium, 0.10~0.50% zinc, surplus is copper and unavoidable impurities.
2. the preparation method of the CuCrZr alloy material described in claim 1 comprises following operation:
1) founding: the copper of 88.54~97.26 weight parts and the cupronickel of 0.06~0.92 weight part are put into smelting furnace; Be heated to 1250 ℃~1280 ℃ fusings; After the fusing fully; Add the copper-magnesium alloy of throwing 0.14~0.56 weight part, the chromiumcopper of 2.50~8.75 weight parts, the zinc of 0.1~0.5 weight part, the copper zirconium alloy of 0.29~1.54 weight part and the cupro silicon of 0.06~0.36 weight part again, cast after stirring;
2) homogenizing is handled: the alloy body of gained is 920 ℃~960 ℃ insulation taking-up coolings after 4~6 hours down in will casting.
3. the preparation method of CuCrZr alloy material as claimed in claim 2 is characterized in that: in the said step 1) in the smelting furnace alloy begin to adopt in the melting process N 2The gas shiled melting.
4. the preparation method of CuCrZr alloy material as claimed in claim 2; It is characterized in that: nickel content is 13~17% in the said cupronickel; Silicone content 14~18% in the said cupro silicon; Mg content is 18~22% in the said copper-magnesium alloy, and chromium content is 8~12% in the said chromiumcopper, and zirconium content is 13~17% in the said copper zirconium alloy.
5. the method for preparing band of a CuCrZr alloy material as claimed in claim 1 comprises following operation:
3) hot rolling and quenching: hot CuCrZr alloy is carried out hot rolling on milling train, and press quenching, finishing temperature is being not less than 850 ℃;
4) rolling: band after the milling is rolled into the strip that meets the product size requirement on milling train;
5) annealing: the band after rolling is carried out anneal, and control annealed temperature is 400 ℃~500 ℃, and annealing speed is 5~23m/min;
6) stretch-bending straightening: the strip after the anneal is carried out stretch-bending straightening handle on straightener, the flatness defect of conditioning strip material and minimizing band internal residual stress.
6. the method for preparing band of CuCrZr alloy material as claimed in claim 5 is characterized in that, described rolling process comprises following operation:
Roughing: the band after the milling processing is carried out roughing on reversable mill;
Ageing treatment: the band after the roughing placed be full of N 2Lehre in carry out ageing treatment one time, the control furnace temperature is 400 ℃~500 ℃, be incubated 4~8 hours, cools off then;
In roll: roll during the band after timeliness is carried out on middle milling train;
Secondary ageing is handled: the band after rolling in inciting somebody to action carries out anneal in lehre, and the control furnace temperature is 400 ℃~500 ℃, and annealing speed is 5~23m/min;
Finish rolling: the band after the secondary ageing processing is rolled into the strip that meets the product size requirement on finishing mill.
7. the method for preparing band of CuCrZr alloy material as claimed in claim 5 is characterized in that: before the said rolling operation milling is carried out on the surface of hot rolled band and handled; Behind the said stretch-bending straightening band is carried out surface passivation and handle, and band is cut into the product of corresponding specification; Described milling machine operation is accomplished on two-sided Milling Machine, comprises that upper and lower surface and two sides to band carry out two-sided milling, and the milling amount on upper and lower surface is every 1 ± 0.3mm, and the side milling amount is every limit 2mm; Strip produces 0~3% unit elongation in the said stretch-bending straightening operation.
8. the method for preparing band of CuCrZr alloy material as claimed in claim 5; It is characterized in that: described hot-rolled manipulation is at least once; Thickness of strip after the hot rolling is 15~18mm, wherein last time hot rolling draught>50%, and finishing temperature is not less than 850 ℃.
9. the method for preparing band of CuCrZr alloy material as claimed in claim 6 is characterized in that: roll with ageing treatment in also being provided with after described secondary ageing is handled and operate; Thickness of strip after the said roughing is 1.0~1.8mm; In thickness of strip after rolling be 0.2~0.4mm.
10. the method for preparing band of CuCrZr alloy material as claimed in claim 5 is characterized in that: described operation 3)~6) in when the last action step finishes, carry out clot operation, carry out the uncoiling operation when next operation steps begins.
CN2012102081907A 2012-06-21 2012-06-21 CuCrZr alloy material, preparation method thereof and method for preparing strips with same Pending CN102719694A (en)

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CN107475559A (en) * 2017-09-21 2017-12-15 中国西电电气股份有限公司 A kind of high-strength highly-conductive high thermal stability chrome zirconium copper alloy and preparation method thereof
CN107988570A (en) * 2017-11-30 2018-05-04 中铝洛阳铜加工有限公司 A kind of copper alloy plate strip paper tinsel low temperature destressing stretcher leveling technique
CN108359836A (en) * 2018-03-12 2018-08-03 东北大学 A kind of preparation method of the Cu-Cr-Zr alloy thin bands based on Sub realizable fuzzy matrix
CN110527866A (en) * 2019-09-29 2019-12-03 广东和润新材料股份有限公司 A kind of highly conductive high-strength copper band and preparation method thereof
CN110835699A (en) * 2019-11-05 2020-02-25 宁波兴业盛泰集团有限公司 High-strength high-conductivity copper-chromium-zirconium alloy material and preparation method thereof
CN111411255A (en) * 2020-04-17 2020-07-14 中铝材料应用研究院有限公司 Copper alloy for electronic component and preparation method thereof
CN112301251A (en) * 2020-09-25 2021-02-02 中铜华中铜业有限公司 Aging strengthening type Cu-Cr-Zr alloy plate/strip and preparation method thereof
CN112792154A (en) * 2020-12-24 2021-05-14 国工恒昌新材料沧州有限公司 Method for preparing C70250 nickel silicon bronze strip by using horizontal continuous casting blank

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107475559A (en) * 2017-09-21 2017-12-15 中国西电电气股份有限公司 A kind of high-strength highly-conductive high thermal stability chrome zirconium copper alloy and preparation method thereof
CN107475559B (en) * 2017-09-21 2019-06-18 中国西电电气股份有限公司 A kind of high-strength highly-conductive high thermal stability chrome zirconium copper alloy and preparation method thereof
CN107988570A (en) * 2017-11-30 2018-05-04 中铝洛阳铜加工有限公司 A kind of copper alloy plate strip paper tinsel low temperature destressing stretcher leveling technique
CN108359836A (en) * 2018-03-12 2018-08-03 东北大学 A kind of preparation method of the Cu-Cr-Zr alloy thin bands based on Sub realizable fuzzy matrix
CN110527866A (en) * 2019-09-29 2019-12-03 广东和润新材料股份有限公司 A kind of highly conductive high-strength copper band and preparation method thereof
CN110527866B (en) * 2019-09-29 2021-02-05 广东和润新材料股份有限公司 High-conductivity and high-strength copper strip and preparation method thereof
CN110835699A (en) * 2019-11-05 2020-02-25 宁波兴业盛泰集团有限公司 High-strength high-conductivity copper-chromium-zirconium alloy material and preparation method thereof
CN111411255A (en) * 2020-04-17 2020-07-14 中铝材料应用研究院有限公司 Copper alloy for electronic component and preparation method thereof
CN111411255B (en) * 2020-04-17 2021-05-28 中铝材料应用研究院有限公司 Copper alloy for electronic component and preparation method thereof
CN112301251A (en) * 2020-09-25 2021-02-02 中铜华中铜业有限公司 Aging strengthening type Cu-Cr-Zr alloy plate/strip and preparation method thereof
CN112792154A (en) * 2020-12-24 2021-05-14 国工恒昌新材料沧州有限公司 Method for preparing C70250 nickel silicon bronze strip by using horizontal continuous casting blank

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Application publication date: 20121010