CN102383001B - 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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- CN102383001B CN102383001B CN 201110299334 CN201110299334A CN102383001B CN 102383001 B CN102383001 B CN 102383001B CN 201110299334 CN201110299334 CN 201110299334 CN 201110299334 A CN201110299334 A CN 201110299334A CN 102383001 B CN102383001 B CN 102383001B
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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 for radiator.
Background technology
According to standard GB/T/T 5231-2001, according to chemical composition and shape of product, fine copper is divided into a copper (T1 copper), No. two copper (T2 copper), No. three copper (T3 copper) etc.Wherein, the content that in T2 copper, the content of copper and silver should be not less than copper in 99.9%, T3 copper and silver should be not less than 99.7%.Because the different content of impurity that cause of 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 the reductions such as silver, chromium, magnesium, zinc are minimum.In T2 copper, the impurity contents such as iron, arsenic, bismuth, nickel lack several times even tens times than T3 copper, thus make the radiating effect of each parts in radiator take T2 copper as raw material can be than several 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, for the above-mentioned deficiency of prior art, proposes the T2 copper strips preparation method who is used for radiator that a kind of technique 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 for radiator, it comprises the steps: S1: prepare burden according to following formula rate: the total amount of copper and silver 〉=99.9%, 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, in smelting furnace, temperature of charge is 1160 ℃ to 1280 ℃ in smelting furnace;
S2: after the raw material fusing in the S1 step, cover the charcoal of one deck drying 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 formula requires and changes in holding furnace, 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 ℃, employing draws 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 the T2 copper strip roll base of 58 to 62 meters, in the horizontal casting process, horizontal continuous casting equipment inside is full of rare gas element;
S4: the T2 copper strip roll 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 then direct cold rolling cogging is put into clock hood type furnace with the T2 copper strips after cold rolling cogging and carried out process annealing for the 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 in step S2.
In step S3, described rare gas element is helium or neon.
In step S4, process annealing for the first time is before with T2 copper strips loose winding.
In step S5, the annealing temperature of process annealing for the second time is 300 ℃ to 350 ℃, and soaking time is 3 hours to 4 hours.
In step S5, the thickness of the T2 copper strips after cold finish rolling is 0.03 millimeter to 0.06 millimeter.
The technological process of production of the present invention is shorter, need not homogenizing annealing, and cold working rate is larger, and the process annealing number of times is also less.And make the T2 copper strips inside can air amount by the method that employing covers charcoal.Preparation method of the present invention need not to transform in a large number existing installation, need not to buy expensive hot rolling cogging equipment, saves cost and radiating effect better.
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%.
Determine after proportioning raw materials, raw material to be sent into melt in furnace.The furnace charge temperature of fusion is warmed up to 1160 ℃ to 1250 ℃ in atmosphere.Highly purified copper in melting process easily with in the air intake raw material, cause the inner air filled cavity that forms of raw material, therefore in the present embodiment, after raw material liquefies fully, cover the charcoal of one deck drying 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 formula requires and changes in holding furnace, the holding furnace temperature is 1100 ℃ to 1150 ℃, and soaking time is 30 to 45 minutes.In this step, in order to prevent other impurity incoming stock inside, employing wooden stick or sticking plaster stirring liquid raw material.
Carry out horizontal casting after insulation, casting temp is 1220 ℃ to 1250 ℃, employing draws 17 millimeters, stop 2 seconds, return and push away the technique of 3 millimeters, casting speed is 179mm/min, 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 strip roll bases.In this step, because the T2 copper strips has that fusing point is high, poor fluidity and easily oxidation, make the horizontal continuous casting equipment oxidation serious when horizontal casting, greatly reduce the work-ing life of horizontal continuous casting equipment.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 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 after face, then carry out 360 ℃, the insulation process annealing first of 5 hours in clock hood type furnace.Due to the singularity of T2 copper strips, after process annealing, copper strips has stronger adhesive first, as directly carry out subsequent technique may cause part material to stick on equipment and cause wastage of material and copper strips in uneven thickness.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.Be rolled to 0.5 mm thick with 8 times again on the four reversible roughing mills of roller after annealing, then carry out 300 ℃ in clock hood type furnace, the insulation last process annealing of 3 hours.Cleans on the degreasing pickling line after annealing, after cleaning 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 carrying out 200 ℃, 2 hours after cold finish rolling in clock hood type furnace improves its comprehensive mechanical performance, then carries out surface treatment on degreasing acid wash passivation line.Carry out the check of mechanical property and final product quality after 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%.
Determine after proportioning raw materials, raw material to be sent into melt in furnace.The furnace charge temperature of fusion is warmed up to 1150 ℃ to 1280 ℃ in atmosphere.Highly purified copper in melting process easily with in the air intake raw material, cause the inner air filled cavity that forms of raw material, therefore in the present embodiment, after raw material liquefies fully, cover the charcoal of one deck drying 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 formula requires and changes in holding furnace, the holding furnace temperature is 1120 ℃ to 1130 ℃, and soaking time is 30 to 45 minutes.In this step, in order to prevent other impurity incoming stock inside, employing wooden stick or sticking plaster stirring liquid raw material.
Carry out horizontal casting after insulation, casting temp is 1220 ℃ to 1250 ℃, employing draws 19 millimeters, stop 3 seconds, return and push away the technique of 6 millimeters, casting speed is 182mm/min, 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 strip roll bases.In this step, because the T2 copper strips has that fusing point is high, poor fluidity and easily oxidation, make the horizontal continuous casting equipment oxidation serious when horizontal casting, greatly reduce the work-ing life of horizontal continuous casting equipment.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 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 after face, then carry out 360 ℃, the insulation process annealing first of 5 hours in clock hood type furnace, then be rolled to 0.6 mm thick with 7 times on the four reversible roughing mills of roller, then carry out 300 ℃ in clock hood type furnace, be incubated the last process annealing of 3 hours.Cleans on the degreasing pickling line after annealing, after cleaning 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 carrying out 200 ℃, 2 hours after cold finish rolling in clock hood type furnace improves its comprehensive mechanical performance, then carries out surface treatment on degreasing acid wash passivation line.Carry out the check of mechanical property and final product quality after 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 hydraulic 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 the little load Vickers hardness tester of Laizhou, Shandong city's trier head factory manufacturing, model HV-5.
Existing for radiator T2 copper strips electric conductivity and the key technical indexes of mechanical property requires and various embodiments of the present invention are produced relatively sees the following form for the technical indicator of the T2 copper strips of radiator:
Can find out from above-mentioned list, utilize the T2 copper strips that the present invention makes to meet the technological standard that radiator is used the T2 copper strips fully.And technique of the present invention is more simple, can directly utilize existing technical equipment, need not to buy other hot rolling cogging equipment, saves cost.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various modifications or replenish 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 (1)
1. a T2 copper strips preparation method who is used for radiator, is characterized in that, the method comprises the steps:
S1: prepare burden according to following formula rate: the total amount of copper and silver 〉=99.9%, 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, in smelting furnace, temperature of charge is 1160 ℃ to 1280 ℃ in smelting furnace;
S2: after the raw material fusing in the S1 step, cover the charcoal of one deck drying 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 formula requires and changes in holding furnace, the holding furnace temperature is 1100 ℃ to 1150 ℃, and soaking time is 30 to 45 minutes; Adopt wooden stick or sticking plaster to stir liquid raw material;
S3: horizontal casting, casting temp is 1220 ℃ to 1250 ℃, employing draws 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 ℃, obtains thickness and be 4 to 6.5 millimeters, width and be 12 to 100 millimeters, length and be the T2 copper strip roll base of 58 to 62 meters, in the horizontal casting process, horizontal continuous casting equipment inside is full of rare gas element, and described rare gas element is helium or neon;
S4: the T2 copper strip roll 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 then direct cold rolling cogging is put into clock hood type furnace with the T2 copper strips after cold rolling cogging and carried out process annealing for the first time, annealing temperature is 360 ℃ to 420 ℃, soaking time 5 hours to 6 hours; Process annealing for the first time is before with T2 copper strips loose winding;
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; The annealing temperature of process annealing for the second time is 300 ℃ to 350 ℃, and soaking time is 3 hours to 4 hours; The thickness of the T2 copper strips after 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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| 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 CN102383001A (en) | 2012-03-21 |
| CN102383001B true CN102383001B (en) | 2013-05-08 |
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| 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 |
| 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 |
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 |
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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 |
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