CN102383001A - Production method of T2 copper strap used for automobile radiator - Google Patents
Production method of T2 copper strap used for automobile radiator Download PDFInfo
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- CN102383001A CN102383001A CN201110299334XA CN201110299334A CN102383001A CN 102383001 A CN102383001 A CN 102383001A CN 201110299334X A CN201110299334X A CN 201110299334XA CN 201110299334 A CN201110299334 A CN 201110299334A CN 102383001 A CN102383001 A CN 102383001A
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Abstract
The invention discloses a production method of a T2 copper strap used for an automobile radiator, which belongs to the field of material processing, and solves the problems of the prior art that the process flow of the T2 copper strap production process is longer and the required equipment is expensive. The production method of the T2 copper strap used for the automobile radiator comprises the following steps: batching and melting raw material, and covering dry wood coal on liquid raw material; transferring the liquid raw material covered with the dry wood coal into a heat preserving furnace with the temperature of 1100 DEG C to 1150 DEG C for 30 to 45 minutes, then performing horizontal continuous casting, the casting temperature being 1220 DEG C to 12050 DEG C, and adopting drawing, stopping and returning process; milling and cold rolling cogging, then performing intermediate annealing and rough rolling to reduce-second intermediate annealing-surface cleaning and passivating-cold finish rolling-low temperature heat treatment on finished product-surface cleaning and passivating-bending and flattening, and obtaining the required T2 copper strap. With the invention, the existing homogenizing anneal procedure can be omitted, the additionally arranged expensive equipment can be avoided, the complexity of the process is reduced, and the cost can be saved.
Description
Technical field
The present invention relates to a kind of preparation method of T2 copper strips, relate in particular to a kind of T2 copper strips preparation method who is used for radiator.
Background technology
According to standard GB/T 5231-2001, fine copper is divided into a copper (T1 copper), No. two copper (T2 copper), No. three copper (T3 copper) etc. according to chemical ingredients and shape of product.Wherein, copper should be not less than 99.9% with the content of silver in the T2 copper, and copper should be not less than 99.7% with the content of silver in the T3 copper.Because the different content of impurity that cause of the purity of copper and silver are different.These impurity elements are in various degree its thermal conductivity of reduction all, wherein reduces at most with titanium, phosphorus, iron, silicon, arsenic etc., and bismuth, aluminium, calcium halophosphate activated by antimony andmanganese, nickel etc. take second place, and reductions such as silver, chromium, magnesium, zinc are minimum.Impurity contents such as iron, arsenic, bismuth, nickel lack several times even tens times than T3 copper in the T2 copper, thus in the radiator with T2 copper be raw material make the radiating effect of each parts can be than quite a few times of T3 copper.
The preparation of T2 copper at present adopts the mode of homo genizing annelaing and hot rolling cogging to make usually, and its mechanical means is expensive, technical process is longer, wastes more man power and material.
Summary of the invention
Technical problem to be solved by this invention is, to the above-mentioned deficiency of prior art, proposes the T2 copper strips preparation method who is used for radiator that a kind of technology is simple, need not large-scale redevelopment existing installation and saving cost.
The technical solution adopted for the present invention to solve the technical problems is to propose a kind of T2 copper strips preparation method who is used for radiator; It comprises the steps: S1: prepare burden according to following formula rate: total amount >=99.9% of copper and silver; Iron: 0.002% to 0.004%; Bismuth: 0.0003% to 0.0008%, zinc: 0.001% to 0.005%, other impurity meet the requirement of T2 copper; With the material melting for preparing, temperature of charge is 1160 ℃ to 1280 ℃ in the smelting furnace in smelting furnace;
S2: after treating the raw material fusing in the S1 step; Cover one deck exsiccant charcoal on liquid level; Then stir and drag for slag, sampling analysis, adjustment composition; Composition meets the raw material that will be coated with dry charcoal after prescription requires and changes in the holding furnace, and the holding furnace temperature is 1100 ℃ to 1150 ℃, and soaking time is 30 to 45 minutes;
S3: horizontal casting; Casting temp is 1220 ℃ to 1250 ℃, adopt and to draw 17 to 19 millimeters, stop 2 to 3 seconds, return and push away 3 to 6 millimeters, casting speed is 179 to 182 mm/min; The made-up belt temperature out is 500 ℃; Obtain thickness and be 4 to 6.5 millimeters, width and be 12 to 100 millimeters, length and be 58 to 62 meters T2 copper strips volume base, in the horizontal casting process, horizontal continuous casting equipment inside is full of rare gas element;
S4: the T2 copper strips volume base that the S3 step is obtained carries out off-line and mills face; Every facing cut goes 0.7 to 0.8 millimeter, and direct cold rolling cogging is then put into the bell jar stove with the T2 copper strips after the cold rolling cogging and carried out the process annealing first time; Annealing temperature is 360 ℃ to 420 ℃, soaking time 5 hours to 6 hours;
S5: roughing attenuate------surface cleaning passivation---cold finish rolling---low temperature heat treatment of finished product---surface cleaning passivation---the stretch bending leveling of process annealing for the second time.
Adopt wooden stick or sticking plaster to stir liquid raw material among the step S2.
Among the step S3, said rare gas element is helium or neon.
Among the step S4, process annealing for the first time is before with T2 copper strips loose winding.
The annealing temperature of process annealing for the second time is 300 ℃ to 350 ℃ among the step S5, and soaking time is 3 hours to 4 hours.
Among the step S5, the thickness of the T2 copper strips after the cold finish rolling is 0.03 millimeter to 0.06 millimeter.
The technological process of production of the present invention is lacked, need not homogenizing annealing, and cold working rate is bigger, and the process annealing number of times is also less.And through adopting the method that covers charcoal to make T2 copper strips inside can not suck air.Preparing method of the present invention need not to transform in a large number existing installation, need not to buy expensive hot rolling cogging equipment, and it is better to practice thrift cost and radiating effect.
Embodiment
The invention is further illustrated by the following examples, but the present invention not only is confined to following examples.
Embodiment 1
At first need the proportioning raw material, in the present embodiment, the copper of raw material and silver content are 99.9%, and iron level is 0.002%, and bi content is 0.0003% to 0.0005%, and zinc content is 0.001% to 0.005%.
Confirm after the proportioning raw materials raw material to be sent into melt in furnace.In atmosphere, the furnace charge temperature of fusion is warmed up to 1160 ℃ to 1250 ℃.Highly purified copper sucks air in the raw material in melting process easily, causes the inner formation of raw material air filled cavity, so in the present embodiment; After treating that raw material liquefies fully; Cover one deck exsiccant charcoal on liquid level, then stir and drag for slag, sampling analysis, adjustment composition, composition meets the raw material that will be coated with dry charcoal after prescription requires and changes in the holding furnace; The holding furnace temperature is 1100 ℃ to 1150 ℃, and soaking time is 30 to 45 minutes.In this step,, adopt wooden stick or sticking plaster to stir liquid raw material in order to prevent the incoming stock inside of other impurity.
Carry out horizontal casting after the insulation; Casting temp is 1220 ℃ to 1250 ℃; Employing draws 17 millimeters, stop 2 seconds, return and push away 3 millimeters technology; Casting speed is 179mm/min, and the made-up belt temperature out is 500 ℃, and obtaining thickness and be 4 to 5 millimeters, width and be 12 to 100 millimeters, length is 58 to 62 meter T2 copper strips volume base.In this step,, make that when horizontal casting the horizontal continuous casting equipment oxidation is serious, greatly reduce the work-ing life of horizontal continuous casting equipment because the T2 copper strips has fusing point height, mobile difference and easy oxidation.In the present embodiment, fill rare gas element to prevent the oxidation of the flat continuous casting installation for casting of water at horizontal continuous casting equipment.In the present embodiment, the rare gas element of filling is a helium.
Then adopt off-line to mill face machine off-line the above-mentioned roll coil of strip and mill face, every facing cut goes 0.7 millimeter.Mill direct cold rolling cogging behind the face, then in the bell jar stove, carry out 360 ℃, 5 hours process annealing first of insulation.Because the singularity of T2 copper strips, after the process annealing, copper strips has stronger adhesive first, causes wastage of material and copper strips in uneven thickness as directly carrying out subsequent technique possibly cause part material to stick on the equipment.For solving above-mentioned adhesion problems, in the present embodiment, before copper strips process annealing first, copper strips is carried out the loose winding operation.On the reversible roughing mill of four rollers, be rolled to 0.5 mm thick again after the annealing, in the bell jar stove, carry out 300 ℃, 3 hours last process annealing of insulation again with 8 times.Annealing back is cleaned on the degreasing pickling line, clean the back on cold finishing mill cold finish rolling to keeping 0.03 to 0.05 millimeter of thickness on file.The low-temperature heat treatment of in the bell jar stove, carrying out after the cold finish rolling 200 ℃, 2 hours improves its comprehensive mechanical performance, on degreasing acid wash passivation line, carries out surface treatment again.Carry out the check of mechanical property and final product quality behind the stretch bending leveling, last sub-cut packing warehouse-in.
Embodiment 2
The proportioning raw material, in the present embodiment, the copper of raw material and silver content are 99.93%, and iron level is 0.003% to 0.004%, and bi content is 0.0004% to 0.0008%, and zinc content is 0.001% to 0.002%.
Confirm after the proportioning raw materials raw material to be sent into melt in furnace.In atmosphere, the furnace charge temperature of fusion is warmed up to 1150 ℃ to 1280 ℃.Highly purified copper sucks air in the raw material in melting process easily, causes the inner formation of raw material air filled cavity, so in the present embodiment; After treating that raw material liquefies fully; Cover one deck exsiccant charcoal on liquid level, then stir and drag for slag, sampling analysis, adjustment composition, composition meets the raw material that will be coated with dry charcoal after prescription requires and changes in the holding furnace; The holding furnace temperature is 1120 ℃ to 1130 ℃, and soaking time is 30 to 45 minutes.In this step,, adopt wooden stick or sticking plaster to stir liquid raw material in order to prevent the incoming stock inside of other impurity.
Carry out horizontal casting after the insulation; Casting temp is 1220 ℃ to 1250 ℃; Employing draws 19 millimeters, stop 3 seconds, return and push away 6 millimeters technology; Casting speed is 182mm/min, and the made-up belt temperature out is 500 ℃, and obtaining thickness and be 4 to 6.5 millimeters, width and be 12 to 100 millimeters, length is 58 to 62 meter T2 copper strips volume base.In this step,, make that when horizontal casting the horizontal continuous casting equipment oxidation is serious, greatly reduce the work-ing life of horizontal continuous casting equipment because the T2 copper strips has fusing point height, mobile difference and easy oxidation.In the present embodiment, fill rare gas element to prevent the oxidation of the flat continuous casting installation for casting of water at horizontal continuous casting equipment.In the present embodiment, the rare gas element of filling is a neon.
Then adopt off-line to mill face machine off-line the above-mentioned roll coil of strip and mill face, every facing cut goes 0.8 millimeter.Mill direct cold rolling cogging behind the face, then in the bell jar stove, carry out 360 ℃, 5 hours process annealing first of insulation, on the reversible roughing mill of four rollers, be rolled to 0.6 mm thick again, in the bell jar stove, carry out 300 ℃ again, be incubated 3 hours last process annealing with 7 times.Annealing back is cleaned on the degreasing pickling line, clean the back on cold finishing mill cold finish rolling to keeping 0.035 to 0.06 millimeter of thickness on file.The low-temperature heat treatment of in the bell jar stove, carrying out after the cold finish rolling 200 ℃, 2 hours improves its comprehensive mechanical performance, on degreasing acid wash passivation line, carries out surface treatment again.Carry out the check of mechanical property and final product quality behind the stretch bending leveling, last sub-cut packing warehouse-in.
Embodiments of the invention gained sample is carried out Performance Detection:
Adopt State Standard of the People's Republic of China GB/T228-2002 metallic substance tensile test at room temperature method to obtain.Tensile testing machine is WA-20 and the WA-50MC electric-liquid type universal testing machine that Shen, Shanghai City force tester factory makes, and class of precision is the I level.
Hardness The data State Standard of the People's Republic of China GB/T4340.1-1999 Vickers Hardness Test method obtains.Hardness is counted Laizhou City, Shandong trier head factory and is made little load Vickers hardness tester, model HV-5.
The existing T2 copper strips electric conductivity of radiator and the key technical indexes requirement of mechanical property and the technical indicator of the T2 copper strips that is used for radiator that various embodiments of the present invention are produced of being used for relatively sees the following form:
Can find out that from above-mentioned tabulation the T2 copper strips that utilizes the present invention to process meets the technological standard of radiator with the T2 copper strips fully.And technology of the present invention is more simple, can directly utilize existing technical equipment, need not to buy other hot rolling cogging equipment, practices thrift cost.
Specific embodiment described herein only is that the present invention's spirit is illustrated.Person of ordinary skill in the field of the present invention can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Claims (6)
1. a T2 copper strips preparation method who is used for radiator is characterized in that this method comprises the steps:
S1: prepare burden according to following formula rate: total amount >=99.9% of copper and silver, iron: 0.002% to 0.004%, bismuth: 0.0003% to 0.0008%, zinc: 0.001% to 0.005%, other impurity meet the requirement of T2 copper; With the material melting for preparing, temperature of charge is 1160 ℃ to 1280 ℃ in the smelting furnace in smelting furnace;
S2: after treating the raw material fusing in the S1 step; Cover one deck exsiccant charcoal on liquid level; Then stir and drag for slag, sampling analysis, adjustment composition; Composition meets the raw material that will be coated with dry charcoal after prescription requires and changes in the holding furnace, and the holding furnace temperature is 1100 ℃ to 1150 ℃, and soaking time is 30 to 45 minutes;
S3: horizontal casting; Casting temp is 1220 ℃ to 1250 ℃, adopt and to draw 17 to 19 millimeters, stop 2 to 3 seconds, return and push away 3 to 6 millimeters, casting speed is 179 to 182 mm/min; The made-up belt temperature out is 500 ℃; Obtain thickness and be 4 to 6.5 millimeters, width and be 12 to 100 millimeters, length and be 58 to 62 meters T2 copper strips volume base, in the horizontal casting process, horizontal continuous casting equipment inside is full of rare gas element;
S4: the T2 copper strips volume base that the S3 step is obtained carries out off-line and mills face; Every facing cut goes 0.7 to 0.8 millimeter, and direct cold rolling cogging is then put into the bell jar stove with the T2 copper strips after the cold rolling cogging and carried out the process annealing first time; Annealing temperature is 360 ℃ to 420 ℃, soaking time 5 hours to 6 hours;
S5: roughing attenuate------surface cleaning passivation---cold finish rolling---low temperature heat treatment of finished product---surface cleaning passivation---the stretch bending leveling of process annealing for the second time.
2. the T2 copper strips preparation method who is used for radiator as claimed in claim 1 is characterized in that, adopts wooden stick or sticking plaster to stir liquid raw material among the step S2.
3. the T2 copper strips preparation method who is used for radiator as claimed in claim 1 is characterized in that among the step S3, said rare gas element is helium or neon.
4. the T2 copper strips preparation method who is used for radiator as claimed in claim 1 is characterized in that, among the step S4, process annealing for the first time is before with T2 copper strips loose winding.
5. the T2 copper strips preparation method who is used for radiator as claimed in claim 1 is characterized in that, the annealing temperature of process annealing for the second time is 300 ℃ to 350 ℃ among the step S5, and soaking time is 3 hours to 4 hours.
6. the T2 copper strips preparation method who is used for radiator as claimed in claim 1 is characterized in that, among the step S5, the thickness of the T2 copper strips after the cold finish rolling is 0.03 millimeter to 0.06 millimeter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110299334 CN102383001B (en) | 2011-09-25 | 2011-09-25 | Production method of T2 copper strap used for automobile radiator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110299334 CN102383001B (en) | 2011-09-25 | 2011-09-25 | Production method of T2 copper strap used for automobile radiator |
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| CN102383001A true CN102383001A (en) | 2012-03-21 |
| CN102383001B CN102383001B (en) | 2013-05-08 |
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| CN 201110299334 Expired - Fee Related CN102383001B (en) | 2011-09-25 | 2011-09-25 | Production method of T2 copper strap used for automobile radiator |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103397288A (en) * | 2013-07-24 | 2013-11-20 | 安徽鑫科新材料股份有限公司 | Machining process of zinc-copper with mechanical properties controlled by machining rate |
| CN110253229A (en) * | 2019-07-12 | 2019-09-20 | 姹や寒 | A kind of allowance control method of degree of precision copper strips |
| CN111519064A (en) * | 2020-06-05 | 2020-08-11 | 浙江天河铜业股份有限公司 | Manufacturing method of ultrathin electronic-grade copper plate strip based on metal processing field |
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| CN101181737A (en) * | 2007-10-22 | 2008-05-21 | 倪智勇 | Method for producing oxygen-free high conductivity type copper strip |
| CN101580922A (en) * | 2009-06-21 | 2009-11-18 | 宁波市鄞州锡青铜带制品有限公司 | Method for producing tin phosphorus bronze band by direct cold cogging |
| CN101709402A (en) * | 2009-12-11 | 2010-05-19 | 九星控股集团有限公司 | Cu-Sn-Te-P alloy strip for automobile water tank radiator |
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2011
- 2011-09-25 CN CN 201110299334 patent/CN102383001B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101181737A (en) * | 2007-10-22 | 2008-05-21 | 倪智勇 | Method for producing oxygen-free high conductivity type copper strip |
| CN101580922A (en) * | 2009-06-21 | 2009-11-18 | 宁波市鄞州锡青铜带制品有限公司 | Method for producing tin phosphorus bronze band by direct cold cogging |
| CN101709402A (en) * | 2009-12-11 | 2010-05-19 | 九星控股集团有限公司 | Cu-Sn-Te-P alloy strip for automobile water tank radiator |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103397288A (en) * | 2013-07-24 | 2013-11-20 | 安徽鑫科新材料股份有限公司 | Machining process of zinc-copper with mechanical properties controlled by machining rate |
| CN110253229A (en) * | 2019-07-12 | 2019-09-20 | 姹や寒 | A kind of allowance control method of degree of precision copper strips |
| CN111519064A (en) * | 2020-06-05 | 2020-08-11 | 浙江天河铜业股份有限公司 | Manufacturing method of ultrathin electronic-grade copper plate strip based on metal processing field |
| CN111519064B (en) * | 2020-06-05 | 2021-04-16 | 浙江天河铜业股份有限公司 | Manufacturing method of ultrathin electronic-grade copper plate strip based on metal processing field |
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