CN105321625A - Production process of soft copper-clad steel wire - Google Patents
Production process of soft copper-clad steel wire Download PDFInfo
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- CN105321625A CN105321625A CN201410338957.7A CN201410338957A CN105321625A CN 105321625 A CN105321625 A CN 105321625A CN 201410338957 A CN201410338957 A CN 201410338957A CN 105321625 A CN105321625 A CN 105321625A
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Abstract
The invention relates to a production process of a soft copper-clad steel wire. The production process of the soft copper-clad steel wire successively comprises the steps of drawing, high-temperature tempering, electro-deposition pretreatment, acid electrolyzation, washing, pretreatment electro-deposition, washing, thick processing electro-deposition, washing, anti-oxidation, drying, drawing, washing, anti-oxidation treatment and ammonia-decomposition high-temperature tempering. The production process of the soft copper-clad steel wire has the advantages that the elongation rate of the copper-clad steel wire is greater than or equal to 10%, which is more than one time of the elongation rate of the copper-clad steel wire produced by a traditional tempering process.
Description
Technical field
The present invention relates to a kind of production technology of soft state copper covered steel wire.
Background technology
The sustainable development of data communication cable is more and more applied to specialized communication field, as fields such as data center, banking and insurance business, industrial automation, the vehicles, military communications.More and more higher requirement is proposed to the speed reliability, capability of electromagnetic shielding, mechanical performance etc. of the data communications cable.Therefore, transmission medium has also turned to twisted-pair feeder and optical fiber from coaxial cable, and twisted-pair feeder develops into from 1 initial class, 3 classes, 5 classes and present surpasses 5 classes, 6 classes, surpasses 6 classes, 7 classes.Present twisted-pair feeder all adopts pure copper wire that price is very high as inner core conductor, and China is copper scarcity of resources country, and the substitution material therefore finding copper cash becomes the task of top priority.The conductivity that copper covered steel wire the set high strength of steel, high tenacity and copper are good, produces good high frequency performance after compound.Utilize the premium properties of its composite material, be widely used in post and telecommunications, the numeral such as communication and cable TV, field of signal transmissions.But due to backwardness and the technical defect of its traditional handicraft, after being drawn into fine rule, elongation is not as good as fine copper, its use field is restricted always, as as five classes, surpass five classes, six classes, seven class cable inner wires and coaxial cable and frequently cover layer mesh grid material etc. and all slowly can not get applying because its elongation does not reach corresponding requirements, because as five classes, surpass five classes, six classes, the inner wire of seven class cables and coaxial cable and frequently cover layer mesh grid material etc., require higher antitorque thrust, antitorque thrust is sad relevant to wire rod elongation.
Traditional soft state copper covered steel wire production technology between 0.5-0.7mm is as follows:
1, peel off, by diameter be 6.5 or the steel wire mother metal of 5.5mm carry out removal oxide layer of peeling off;
2, pickling, carries out pickling by the steel wire technical hydrochloric acid after operation of peeling off, to remove steel wire surface because of the thoroughly oxide skin remained of peeling off not;
3, wash, the steel wire clear water after pickling is rinsed, the acid solution that basic removing steel wire surface is residual because of pickling process;
4, rough, the steel wire mother metal being directly 6.5 or 5.5mm is being connected crude steel line machine drawing being drawn to 3.4mm diameter;
5, finish draw, puts into the thin steel wire that water tank drawbench is drawn to 1.60mm diameter by the steel wire of 3.4mm diameter;
6, electro-deposition pre-treatment, 1. be that the steel wire of 1.6mm carries out oil removing by diameter, with remove steel wire surface because of drawing be residual lubricant, 2. the steel wire clear water after oil removing is rinsed, removal steel wire surface is residual degreasing fluid because of oil removing operation, 3. the steel wire hydrochloric acid solution after washing is carried out pickling, remove the oxide skin on steel wire surface, 4. the steel wire clear water after pickling is rinsed, the pickle that basic removal steel wire surface is residual because of pickling process, 5. the steel wire sodium carbonate after washing is carried out alkali neutralization, remove upper track washing step and do not wash down clean pickle completely, steel wire surface is prevented again to be oxidized,
7, sour electrolysis, carries out sour electrolysis to the steel wire sulfuric acid solution after electro-deposition pre-treatment, removes the oxide skin on steel wire surface further;
8, wash, the steel wire after sour electrolysis is washed, with remove steel wire surface because of sour electrowinning process residual acid solution;
9, preliminary treatment electro-deposition, carries out preplating by the steel wire after washing, generates the copper covered steel conductor that copper layer thickness is thinner;
10, wash, the copper covered steel conductor after preliminary treatment electro-deposition is washed, with remove copper covered steel surface because of preliminary treatment electro-deposition residual chemical solution;
11, thick process electro-deposition, does further thick process electro-deposition and generates the thicker copper covered steel conductor of copper layer thickness by the copper covered steel conductor sulfate after washing;
12, wash, the copper covered steel conductor after thick process electro-deposition is washed, to remove the chemical solution of copper covered steel remained on surface;
13, anti-oxidation, the copper covered steel conductor antioxidant after washing being carried out anti-oxidation operation, avoiding blister copper Baogang to produce oxidation because being exposed to for a long time in air;
14, dry, drying is carried out to the finished product copper covered steel conductor after anti-oxidation operation; Avoid being oxidized because of steam adhesive surface;
15, high tempering, carries out high tempering by the copper covered steel wire after drawing, is incubated 6-8 hour after being heated to 500-650 degree, and then cool 12 hours, elongation reaches about 20%;
16, drawing, moves into the thick copper covered steel conductor of drying on water tank drawbench and is drawn to the finished product that diameter is 0.50-0.70mm;
17, wash, finished product copper covered steel conductor is washed, to remove dirt and the grease on copper covered steel surface;
18, anti-oxidation and dry, avoid finished product copper covered steel conductor to be exposed to for a long time in air and produce oxidation.
19, take-up sabot.
There is following defect in the soft state copper covered steel that traditional processing technology is produced: though 1, high tempering operation can soften copper covered steel wire, eliminate work hardening, improve elongation, elongation is made to reach about 20%, but wire rod can be made in follow-up end product drawing process to produce work hardening, elongation reduces rapidly, and finished product elongation can only reach about 4%; 2, the wire drawing oil that steel wire surface is residual after rough and finish draw is difficult to clean up in pickling process, once cleaning not exclusively, will affect the adhesion of steel wire and layers of copper, reduce the rate of finished products of product.
Summary of the invention
The object of the invention is to the problem overcoming the soft state copper covered steel wire elongation deficiency of producing in traditional handicraft, disclose a kind of produce simple, the production technology of elongation and the high soft state copper covered steel wire of rate of finished products.
In order to realize foregoing invention object, the present invention adopts following technical scheme:
The production technology of soft state copper covered steel wire, comprises the following steps: successively
(1) drawing, carries out peeling off descale by steel wire mother metal, then is dried through peracid electrolysis, washing, boronation, high-frequency heating by the steel wire after descale, finally the steel wire after oven dry is drawn to diameter 1.8-2.4mm;
(2) high tempering, steel wire after drawing is put into vacuum tempering furnace and carries out high-temperature heat treatment, between temperature 780-830 DEG C, control heating time between 5-6 hour, then be incubated 5-6 hour, be then cooled to 560-600 DEG C, control cooling time between 12-13 hour, open air-cooler to be again cooled to about 300 DEG C and to come out of the stove, control cooling time between 2-3 hour;
(3) electro-deposition pre-treatment, be that the steel wire hydrochloric acid solution of 1.8-2.4mm carries out pickling by diameter, remove the oxide skin on steel wire surface, and then wash, remove pickle residual in steel wire surface acid-washing operation, steel wire sodium carbonate after washing is carried out alkali neutralization, removes upper track washing step and do not wash down clean pickle completely;
(4) sour electrolysis, carries out sour electrolysis to the steel wire sulfuric acid solution after electro-deposition pre-treatment, removes the oxide skin on steel wire surface further, and activates steel wire surface;
(5) wash, remove pickle residual in last process;
(6) preliminary treatment electro-deposition, carries out preliminary treatment electro-deposition by the steel wire after washing by potassium hydroxide and copper sulphate mixed liquor, generates copper covered steel wire;
(7) wash, remove the solution that last process is residual;
(8) thick process electro-deposition, carries out the thick process electro-deposition of further sulfate by the copper covered steel wire after washing;
(9) wash, remove the electrodeposit liquid of remained on surface in last process;
(10) anti-oxidation, the copper covered steel wire antioxidant after washing is carried out anti-oxidation process;
(11) dry, the copper covered steel wire after anti-oxidation process is carried out drying process;
(12) drawing, is drawn to diameter between 0.50-0.70mm by dried copper covered steel wire;
(13) wash, the copper covered steel wire after drawing is washed, remove the grease on copper covered steel wire surface;
(14) anti-oxidation process, carries out anti-oxidation process by the copper covered steel wire antioxidant after washing;
(15) ammonolysis craft high tempering: 1. ammonolysis craft stage, first ammonia destruction furnace is warming up to about 500 DEG C, insulation makes whole body of heater be heated evenly, then continue to be warming up to 650-670 DEG C and send ammonia, open vent valve simultaneously and water is put in vent valve outlet, when temperature arrives 800-820 DEG C, flame is crocus substantially, there is no and drip, is now the mixture of N2 and H2 in ammonia destruction furnace; 2. the high tempering stage, be filled with by N2 and the H2 mixture decomposited and be equipped with in the vacuum tempering furnace of copper covered steel in ammonia destruction furnace, allow in whole tempering furnace and be full of N2 and H2, temperature is between 780-830 DEG C, and temperature retention time 5-6 hour; Close vacuum tempering furnace, with stove cooling 7.5-8 hour, then air cooling makes in-furnace temperature close to room temperature, is evacuated by stove, pours N2,
Make stove pressure valve show 0MPa, copper covered steel finished product is taken out in blow-on.
More preferably, described step (3) electro-deposition pre-treatment adopts the hydrochloric acid solution of volume ratio between 40%-60% to carry out pickling, and step (4) middle volume ratio carries out sour electrolysis at the sulfuric acid solution of 15%-25% to steel wire.
As preferably, the copper layer thickness in described step (8) after thick process electro-deposition is between 0.002-0.024mm.
As preferably, the 1-1.5 that first heated up by ammonia destruction furnace in described step (15) is little of temperature about 500 DEG C, is then incubated 1.5-2 hour, when temperature rises to about 750 DEG C, in the igniting of vent valve exit, observation flame color and outlet go out with or without water droplet; Stove air cooling time is between 25-30 hour.
As preferably, described steel wire mother metal is H08 steel wire, produces, eliminate polishing process by above-mentioned skill, avoids work hardening to a certain degree, and compared with mild steel M6, H08 steel wire price is low, and therefore production cost is low.
As preferably, described steel wire mother metal is mild steel M6, and mild steel M6 stable material quality, impurity is few, good-extensibility.
As preferably, described boronation immerses in borax soln by steel wire, and borax soln temperature, between 75-85 DEG C, makes steel wire surface form boronation film, borax soln temperature is lower than 75 DEG C, the boronation film quality formed is bad, and in follow-up drawing process, wire drawing oil easily embeds in boronation film, Steel Wire Surface is made to turn black or occur black splotch, borax soln temperature is higher than 85 DEG C, then energy consumption is high, and specifically borax soln temperature is more than 1.5 times of normal level higher than the energy consumption needed for 85 DEG C.
As preferably, in the described whole high tempering stage, ammonolysis craft continues to carry out, until body of heater is cooled to room temperature, opens the explosion protection system being connected to tempering furnace steam vent place simultaneously, in the igniting of steam vent place, prevents the hydrogen of discharging from contacting with air to produce and explode.
As preferably, the diameter of described steel wire mother metal is 6.5mm or 5.5mm.
Adopt the production technology of the soft state copper covered steel wire of technique scheme, its advantage is: 1, in step 1 by the steel wire after descale through sour electrolysis, washing, boronation, drawing again after high-frequency heating oven dry, compared with former technique, reduce drawing number of times, reduce production cost, by producing boronation film on steel wire surface after boronation, metal steel wire can be reduced contact with the direct of mould, extend die life, drawing speed can be improved, reduce the loss of material, obtain uniform and smooth finished surface, boronation film is soluble in water simultaneously, be convenient to the cleaning on follow-up steel wire surface, 2, high tempering can eliminate the work hardening of steel wire, crystal grain thinning, reduce fragility, improve toughness, the wire drawing wet goods of steel wire remained on surface can be made all because high temperature carbonization forms loose scale simultaneously, be easy to follow-up pickling and wash away oxide skin, solve the steel wire layer that often occurs and the bad problem of layers of copper adhesion, rate of finished products is high, in high tempering process, after temperature retention time, first power-off is little of temperature 560-600 DEG C with stove cooling 12-13, thermal stress can be reduced like this, prevent steel wire inside from cracking, then open air-cooler cooling and within 2-3 hour, be quickly cooled to about 300 DEG C and come out of the stove, can save time like this, open the secondary oxidation that air-cooler cooling avoids steel wire simultaneously, it also avoid the oxidation of flue, 3, ammonolysis craft tempering process is adopted, containing a large amount of hydrogen in vacuum tempering furnace, and hydrogen has reduction, the function of light reduced anneal, therefore copper covered steel surface-brightening can be made after tempering, so without the need to carrying out polishing to the copper covered steel after tempering, therefore can by copper covered steel wire direct drawing to 0.50-0.70mm, the copper covered steel finished product of surface-brightening is produced into by ammonolysis craft tempering process, elongation >=10%, eliminate follow-up polishing process, avoid the impact of work hardening again on elongation, finished product elongation is improved.In sum, by elongation >=10% of above-mentioned explained hereafter copper covered steel wire out, the elongation of the copper covered steel wire produced than traditional tempering process at least can be enhanced about more than once.
Embodiment
Below the present invention is described further.
The production technology of soft state copper covered steel wire, comprises the following steps:
(1) drawing, be that the H08 steel wire of 6.5mm or 5.5mm carries out peeling off descale as steel wire mother metal using diameter, again the steel wire after descale being dried through peracid electrolysis, washing, boronation, high-frequency heating, finally the steel wire after oven dry being drawn to diameter between 1.8-2.4mm by connecting machine drawing; Boronation is by single steel wire by borax soln, and borax soln temperature controls between 75-85 DEG C, makes steel wire surface form boronation film;
(2) high tempering, puts into vacuum tempering furnace by the steel wire after drawing and carries out high-temperature heat treatment, eliminates the work hardening of steel wire, improves plasticity, softening steel wire, is beneficial to following process; Make the lubricating fluid remaining in steel wire surface in last process form loose scale through high temperature carbonization simultaneously, be easy to follow-up pickling scale removal; Temperature 780-830 DEG C, heating time 5-6 hour, temperature retention time 5-6 hour, temperature can not higher than 830 DEG C, and temperature is higher than 830 DEG C, and steel wire easily sticks together; Then first power-off cools to 560-600 DEG C with the furnace, and 12-13 hour, then opened air-cooler and be cooled to about 300 DEG C and come out of the stove cooling time, cooling time 2-3 hour;
(3) electro-deposition pre-treatment, be that steel wire volume ratio hydrochloric acid solution between 40%-60% of 1.8-2.4mm carries out pickling by diameter, preferred volume ratio be 50% hydrochloric acid solution carry out pickling, remove the oxide skin on steel wire surface, and then wash, remove pickle residual in steel wire surface acid-washing operation, the steel wire sodium carbonate after washing is carried out alkali neutralization, remove upper track washing step and do not wash down clean pickle completely, prevent steel wire surface to be again oxidized;
(4) sour electrolysis, to steel wire, sour electrolysis is carried out at the sulfuric acid solution of 15%-25% to the steel wire volume ratio after electro-deposition pre-treatment, wherein preferably adopt volume ratio be 20% sulfuric acid solution carry out sour electrolysis, remove further the oxide skin on steel wire surface, and activate steel wire surface;
(5) wash, remove pickle residual in last process;
(6) preliminary treatment electro-deposition, carries out preliminary treatment electro-deposition by the steel wire after washing by potassium hydroxide and copper sulphate mixed liquor, generates layers of copper copper covered steel wire;
(7) wash, remove the solution that last process is residual;
(8) thick process electro-deposition, the copper covered steel wire after washing is carried out the thick process electro-deposition of further sulfate, and copper layer thickness is between 0.002-0.024mm;
(9) wash, remove the electrodeposit liquid of remained on surface in last process;
(10) anti-oxidation, the copper covered steel wire antioxidant after washing is carried out anti-oxidation process, and avoid copper covered steel to be exposed to for a long time in air and produce oxidation, antioxidant adopts BTA;
(11) dry, the copper covered steel after anti-oxidation is carried out drying process, avoids being oxidized because aqueous vapor adheres to copper covered steel wire surface;
(12) drawing, is drawn to diameter by dried copper covered steel wire between 0.50-0.70mm by wire drawing machine;
(13) wash, the copper covered steel wire after drawing is washed, remove the grease on copper covered steel wire surface;
(14) anti-oxidation process, carries out anti-oxidation process by the copper covered steel wire antioxidant after washing;
(15) ammonolysis craft high tempering: 1. ammonolysis craft stage, the 1-1.5 that first heated up by ammonia destruction furnace is little of temperature about 500 DEG C, then 1.5-2 hour is incubated, whole body of heater is heated evenly, continue to be warming up to 650-670 DEG C and send ammonia, open vent valve simultaneously, water is put in vent valve outlet, when temperature rises to about 750 DEG C, light a fire in vent valve exit, observation flame color and outlet flow out with or without water droplet, when temperature arrives 800-820 DEG C, flame reaches crocus substantially, there is no and drip, be now purer N2 and H2 mixture in ammonia destruction furnace, H2 content 75%, N2 content 25%, 2. the high tempering stage, being filled with by N2 and the H2 mixture decomposited in ammonia destruction furnace is equipped with in the vacuum well type tempering furnace of copper covered steel, allow in whole tempering furnace and be full of N2 and H2, temperature 780-830 DEG C, heating time 5-6 hour, temperature retention time 5-6 hour, close vacuum tempering furnace with stove cooling 7.5-8 hour, namely power-off cools with stove, then stove is hung out air cooling 28 hours, make in-furnace temperature close to room temperature, stove is evacuated, pour N2, stove pressure valve is made to show 0MPa, now stove can be opened, take out copper covered steel finished product, the whole high tempering stage, ammonolysis craft continues to carry out, until body of heater is cooled to room temperature, open the explosion protection system being connected to well formula tempering furnace steam vent place simultaneously, and light a fire at steam vent place, prevent the hydrogen of discharging from contacting with air to produce and explode.
Above-mentioned steel wire mother metal also can select diameter to be the high-quality steel of 5.5mm, 6.5mm, such as mild steel M6, is applicable to manufacture five class by the soft state copper covered steel wire of above-mentioned explained hereafter, surpasses five classes, six classes, seven class cable inner wires and coaxial cable frequently cover a layer mesh grid material.
More than show and describe general principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection range is defined by appending claims and equivalent thereof.
Claims (4)
1. the production technology of soft state copper covered steel wire, it is characterized in that comprising the following steps: (1) drawing successively, steel wire mother metal is carried out peeling off descale, again the steel wire after descale is dried through peracid electrolysis, washing, boronation, high-frequency heating, finally the steel wire of oven dry is drawn to diameter 1.8-2.4mm; (2) high tempering, steel wire after drawing is put into vacuum tempering furnace and carries out high-temperature heat treatment, between temperature 780-830 DEG C, control heating time between 5-6 hour, then be incubated 5-6 hour, be then cooled to 560-600 DEG C, control cooling time between 12-13 hour, open air-cooler to be again cooled to about 300 DEG C and to come out of the stove, control cooling time between 2-3 hour; (3) electro-deposition pre-treatment, be that the steel wire hydrochloric acid solution of 1.8-2.4mm carries out pickling by diameter, remove the oxide skin on steel wire surface, and then wash, remove pickle residual in steel wire surface acid-washing operation, steel wire sodium carbonate after washing is carried out alkali neutralization, removes upper track washing step and do not wash down clean pickle completely; (4) sour electrolysis, carries out sour electrolysis to the steel wire sulfuric acid solution after electro-deposition pre-treatment, removes the oxide skin on steel wire surface further, and activates steel wire surface; (5) wash, remove pickle residual in last process; (6) preliminary treatment electro-deposition, carries out preliminary treatment electro-deposition by the steel wire after washing by potassium hydroxide and copper sulphate mixed liquor, generates copper covered steel wire; (7) wash, remove the solution that last process is residual; (8) thick process electro-deposition, carries out the thick process electro-deposition of further sulfate by the copper covered steel wire after washing; (9) wash, remove the electrodeposit liquid of remained on surface in last process; (10) anti-oxidation, the copper covered steel wire antioxidant after washing is carried out anti-oxidation process; (11) dry, the copper covered steel wire after anti-oxidation process is carried out drying process; (12) drawing, is drawn to diameter between 0.5-0.7mm by dried copper covered steel wire; (13) wash, the copper covered steel wire after drawing is washed, remove the grease on copper covered steel wire surface; (14) anti-oxidation process, carries out anti-oxidation process by the copper covered steel wire antioxidant after washing; (15) ammonolysis craft high tempering: 1. ammonolysis craft stage, first ammonia destruction furnace is warming up to about 500 DEG C, insulation makes whole body of heater be heated evenly, then continue to be warming up to 650-670 DEG C and send ammonia, open vent valve simultaneously, water is put in vent valve outlet, when temperature arrives 800-820 DEG C, flame is crocus substantially, there is no and drips, and is now the mixture of N2 and H2 in ammonia destruction furnace; 2. the high tempering stage, N2 and the H2 mixture decomposited in ammonia destruction furnace is filled
Enter to be equipped with in the vacuum tempering furnace of copper covered steel, allow in whole tempering furnace and be full of N2 and H2, temperature is between 780-830 DEG C, and temperature retention time 5-6 hour; Close vacuum tempering furnace, with stove cooling 7.5-8 hour, then air cooling makes in-furnace temperature close to room temperature, is evacuated by stove, pours N2, and make stove pressure valve show 0MPa, copper covered steel finished product is taken out in blow-on.
2. the production technology of soft state copper covered steel wire according to claim 1, is characterized in that described step (3) electricity
Deposition pre-treatment adopts the hydrochloric acid solution of volume ratio between 40%-60% to carry out pickling, and step (4) middle volume ratio carries out sour electrolysis at the sulfuric acid solution of 15%-25% to steel wire.
3. the production technology of soft state copper covered steel wire according to claim 1, is characterized in that copper layer thickness in described step (8) after thick process electro-deposition is between 0.002-0.024mm.
4. the production technology of soft state copper covered steel wire according to claim 1, is characterized in that described boronation immerses in borax soln by steel wire, and borax soln temperature, between 75-85 DEG C, makes steel wire surface form boronation film.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109433835A (en) * | 2018-10-30 | 2019-03-08 | 上海衍衡新材料科技有限公司 | A kind of production method of big specification twisted wire plating welding wire |
| CN111785445A (en) * | 2020-07-31 | 2020-10-16 | 浙江佳伟新材料科技有限责任公司 | Tensile strength control process of copper-clad steel coaxial cable |
-
2014
- 2014-07-17 CN CN201410338957.7A patent/CN105321625A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109433835A (en) * | 2018-10-30 | 2019-03-08 | 上海衍衡新材料科技有限公司 | A kind of production method of big specification twisted wire plating welding wire |
| CN111785445A (en) * | 2020-07-31 | 2020-10-16 | 浙江佳伟新材料科技有限责任公司 | Tensile strength control process of copper-clad steel coaxial cable |
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Application publication date: 20160210 |