CN1804144A - Crystallizer copper tube with transitional chromium coating and hard chromium coating and production process thereof - Google Patents
Crystallizer copper tube with transitional chromium coating and hard chromium coating and production process thereof Download PDFInfo
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- CN1804144A CN1804144A CN 200510048181 CN200510048181A CN1804144A CN 1804144 A CN1804144 A CN 1804144A CN 200510048181 CN200510048181 CN 200510048181 CN 200510048181 A CN200510048181 A CN 200510048181A CN 1804144 A CN1804144 A CN 1804144A
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- copper pipe
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Abstract
The manufacture technique for a crystallized copper tube with transient Cr-plating layer and hard Cr-plating layer comprises: cleaning the base copper tube to remove dust and oil; reverse nicking treatment before plating; preparing electroplate liquid; plating; cleaning; then, arranging transient plating layer with medium thermal-expansion coefficient and hardness between the base tube inner wall and surface hard plating layer. This invention ensures the tube resistance to high temperature, wear and corrosion, and endows the plating layer resistance peel, and has high yield efficiency with stable quality and low cost.
Description
Technical field
The present invention relates to have the crystallizer copper pipe of chromium coating.The invention still further relates to the production technique of crystallizer copper pipe with chromium coating.
Background technology
Crystallizer is the important component part of smeltery's continuous caster, and crystallizer copper pipe is the vitals on the crystallizer.The crystallizer copper pipe because high-temperature molten steel is directly flowed through, stable for making the continuous casting operation process, support equipment and operator safety just require crystallizer copper pipe to have good high temperature resistant, wear-resistant and corrosion resistance nature again.By producing the crystallizer copper pipe with hard chromium in the chromium plating of copper pipe inwall, because of can improving high temperature resistant, the wear-resistant and corrosion resistance nature of crystallizer copper pipe greatly, and production technique is simple, efficient is high, cost is low, and obtains more general application.But inwall is coated with the crystallizer copper pipe of hard chrome, coating takes place in continuous casting production process easily to come off, thus the work-ing life of shortening crystallizer copper pipe.Its reason is that the physicals difference is bigger between copper matrix and the hard chromium, and particularly their thermal expansivity and difference in hardness are bigger, is difficult to adapt to the temperature environment variation of continuous casting production process.For this reason, available technology adopting plates one deck nickel cobalt (alloy) or Rhometal transition layer between copper matrix and anti abrasive hard chromium, this transition layer is useful to preventing that hard chromium from coming off, but crystallizer copper pipe with this coating, need in process of production in two coating baths, to carry out twice plating respectively, its complex manufacturing, production efficiency is low, the production cost height.
Summary of the invention
The objective of the invention is to problem at the prior art existence, a kind of crystallizer copper pipe with transition chromium coating and hard chromium is provided, this kind crystallizer copper pipe is in same coating bath, once finish the plating of crystallizer copper inside pipe wall different performance chromium coating, and produce have surperficial hard chromium and place hard chromium and matrix copper pipe inwall between the crystallizer copper pipe of transition chromium coating, thereby make the production technique of crystallizer copper pipe simple, the production efficiency height, production cost is low, and satisfies its requirement high temperature resistant, wear-resistant, corrosion-resistant and the coating difficult drop-off.The present invention also provides the production technique of this crystallizer copper pipe for this reason.
The present invention has the crystallizer copper pipe of transition chromium coating and hard chromium, include the matrix copper pipe and place the interior surperficial hard chromium of copper pipe, it is provided with the transition chromium coating between copper pipe inwall and surperficial hard chromium, the thermal expansivity of this transition chromium coating is 1.68 * 10
-5/ ℃ to 0.84 * 10
-5/ ℃ between, hardness is between HV450 to HV950.
The production craft step that the present invention has the crystallizer copper pipe of transition chromium coating and hard chromium is:
1, matrix copper pipe rust cleaning, oil removal treatment;
2, anti-carve the matrix copper pipe of handling after rust cleaning, the oil removing, anti-carve consisting of of liquid: chromic anhydride 100～150g/L, sulfuric acid 0.8～1.2g/L, amine inhibitor 100～200ml/L; The processing condition that anti-carve processing are: 35～55 ℃ of temperature, current density 20～50A/dm
2, time 1～4min;
3, according to chromic anhydride 200～300g/L, sulfuric acid 1.6～2.5g/L, electrodeposited chromium coating specialist additive 16～24ml/L, the preparation plating bath is 50～60 ℃ in temperature, and current density is 50～70A/dm
2Under the condition, to plating bath electrolysis 3～5h, be prepared into electrodeposit liquid, carry out plating then with the big anode of little negative electrode;
4, the plating technology condition is: plating temperature is changed to hanging down between 90 ℃～40 ℃ by height.The plating current density by height to hanging down at 50～20A/dm
2Between change, electroplating time is 2～4h;
5, the workpiece after the plating is cleaned, obtain having the crystallizer copper pipe of transition chromium coating and hard chromium.
The invention has the beneficial effects as follows:
1, since crystallizer copper pipe of the present invention between matrix copper pipe inwall and hard chromium, increased thermal expansivity and hardness between it transition chromium coating between the two, and the processing that anti-carves that before plating, the matrix copper pipe is helped improving coating and copper substrate combinating strength, make crystallizer copper pipe satisfy high temperature resistant, wear-resistant and the corrosion resistance nature requirement in, effectively strengthened its anti-performance that comes off, thereby significantly improved the work-ing life of crystallizer copper pipe.
2, compare with the crystallizer copper pipe of nickel-cobalt alloy plating or Rhometal transition layer, production cost can reduce by 50～70%, and owing to be once to finish coating to electroplate in same coating bath, its production technique is simple, easy to operate, the qualification rate of product and production efficiency can improve greatly.
Embodiment
Embodiment 1
Produce crystallizer copper pipe according to following technology step consor with transition chromium coating and hard chromium:
(1) rust cleaning, oil removal treatment:
Get the matrix copper pipe and carry out the mechanical polishing rust cleaning, it is inserted in the degreasing tank that contains neutral finish afterwards, oil removing under 50～60 ℃ of conditions of temperature is taken out after the oil removing with the flowing water flushing, inserts then to contain in the 20% vitriolic pickling tank pickling 3～5min and take out and wash with flowing water;
(2) anti-carve processing:
Matrix copper pipe after rust cleaning, the oil removing is anti-carved processing, anti-carve consisting of of liquid: chromic anhydride 125g/L, sulfuric acid 1.0g/L, amine inhibitor 150ml/L; The processing condition that anti-carve processing are: 45 ℃ of temperature, current density 30A/dm
2, time 2min;
(3) preparation electroplate liquid:
Consisting of of plating bath: chromic anhydride 200g/L, sulfuric acid 1.6g/L, NBCRA1728 electrodeposited chromium coating specialist additive 18ml/L; With above-mentioned plating bath at 60 ℃ of temperature, current density 60A/dm
2Under the condition,, be prepared into electroplate liquid with the big anode electrolysis 4h of little negative electrode;
(4) plating technology condition:
With the heating of the electroplate liquid for preparing, during temperature to 70 ℃, selected current density is at 25A/dm
2The beginning plating begins cooling behind 70 ℃ of plating of bath temperature insulation 30min, in 30min bath temperature is reduced to 50 ℃, and the bath temperature insulation also continues plating for 50 ℃, and electroplating time amounts to 3h40min.
(5) plating aftertreatment:
After the chromium plating of matrix copper pipe is finished, insert to swing in the Rinsing Area and wash, rinse well with flowing water again, promptly obtain the crystallizer copper pipe with transition chromium coating and hard chromium of the present invention.
Embodiment 2
It is poly-identical with embodiment 1 that production has technology step of crystallizer copper pipe of transition chromium coating and hard chromium, distinguishes part and be that the plating technology condition is:
Current density: 20A/dm
2
Plating temperature: 65 ℃ of beginning platings, behind the insulation 30min, in 30min, bath temperature is reduced to 45 ℃ of insulations and continue plating;
Plating time: amount to 4h.
Implement 1 example 3
It is poly-identical with embodiment 1 that production has technology step of crystallizer copper pipe of transition chromium coating and hard chromium, distinguishes part and be that processing condition are:
Plating temperature: 75 ℃ of beginning platings, behind the insulation 30min, continue plating internal cooling plating bath to 55 a ℃ insulation in 1h hour;
Current density: between 75 ℃ of platings, soak and plating bath be cooled to 55 ℃ by 75 ℃ during current density be 35A/dm
2, current density is 30A/dm during 55 ℃ of insulation platings
2
Plating time: amount to 3h.
Embodiment 4
It is poly-identical with embodiment 1 that production has technology step of crystallizer copper pipe of transition chromium coating and hard chromium, distinguishes part and be that the plating technology condition is:
Current density: 35A/dm
2
Plating temperature: behind 80 ℃ of beginning platings, the insulation 1h, cross liquid to 55 ℃ insulation at the 30min internal cooling and continue plating.
Plating time: amount to 2h 4min.
Embodiment 5
It is poly-identical with embodiment 1 that production has technology step of crystallizer copper pipe of transition chromium coating and hard chromium, distinguishes part and be that the plating technology condition is:
Plating temperature: 85 ℃ of beginning platings, behind the insulation 30min, in 30min, bath temperature is reduced to 55 ℃ of insulations and continue plating;
Current density: be 40A/dm between 85 ℃ of platings, insulation and cooldown periods
2, be 35A/dm during 55 ℃ of platings
2
Plating time: amount to 2h 30min.
Embodiment 6
The processing step that production has transition chromium coating and hard chromium is identical with example 1, and the difference part is the electroplate liquid preparation;
Consisting of of plating bath: chromic anhydride 250g/L, sulfuric acid 2.0g/L, NBCRA1728 electrodeposited chromium coating specialist additive 20ml/L; 60 ℃ of temperature, current density is 60A/dm with above-mentioned plating bath
2Under the condition,, be prepared into electroplate liquid with the big anode electrolysis 5h of little negative electrode.
Embodiment 7
Production has that technology step of crystallizer copper pipe of transition chromium coating and hard chromium is poly-with embodiment 1, and wherein the electroplate liquid preparation is with embodiment 6, and the plating technology condition is embodiment 2.
Embodiment 8
Production has that technology step of crystallizer copper pipe of transition chromium coating and hard chromium is poly-with embodiment 1, and electroplate liquid preparation wherein is with embodiment 6, and the plating technology condition is embodiment 3.
Embodiment 9
Production has that technology step of crystallizer copper pipe of transition chromium coating and hard chromium is poly-with embodiment 1, and electroplate liquid preparation wherein is with embodiment 6, and the plating technology condition is embodiment 4.
Claims (2)
1, a kind of brilliant device copper pipe of combination with transition chromium coating and hard chromium, it includes the matrix copper pipe and places the hard chromium of copper pipe internal surface, it is characterized in that being provided with the transition chromium coating between copper pipe inwall and surperficial hard chromium, the thermal expansivity of this transition chromium coating is 1.68 * 10
-5/ ℃ to 0.84 * 10
-5/ ℃ between, hardness is between HV450 to HV950.
2, a kind of production technique of crystallizer copper pipe of claim 1 is characterized in that it comprises following processing step:
(1) matrix copper pipe rust cleaning, oil removal treatment;
(2) anti-carve the matrix copper pipe of handling after rust cleaning, the oil removing, anti-carve consisting of of liquid: chromic anhydride 100～150g/L, sulfuric acid 0.8～1.2g/L, amine inhibitor 100～200ml/L; The processing condition that anti-carve processing are: 35～55 ℃ of temperature, current density 20～50A/dm
2, time 1～4min;
(3) preparing plating bath according to chromic anhydride 200～300g/L, sulfuric acid 1.6～2.5g/L, electrodeposited chromium coating specialist additive 16～24ml/L, is 50～60 ℃ in temperature, and current density is 50～70A/dm
2Under the condition, to plating bath electrolysis 3～5h, be prepared into electrodeposit liquid, carry out plating then with the big anode of little negative electrode;
(4) the plating technology condition is: temperature is changed to hanging down between 90 ℃～40 ℃ by height, the plating current density by height to hanging down at 50～20A/dm
2Between change, electroplating time is 2～4h;
(5) workpiece after the plating is cleaned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510048181 CN1804144A (en) | 2005-12-09 | 2005-12-09 | Crystallizer copper tube with transitional chromium coating and hard chromium coating and production process thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510048181 CN1804144A (en) | 2005-12-09 | 2005-12-09 | Crystallizer copper tube with transitional chromium coating and hard chromium coating and production process thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100463742C (en) * | 2007-04-19 | 2009-02-25 | 武汉钢铁(集团)公司 | Crystallizer having a plating layer |
| CN101555614B (en) * | 2008-04-11 | 2011-03-30 | 深圳富泰宏精密工业有限公司 | Plastic surface galvanizing method |
| CN102330127A (en) * | 2011-10-10 | 2012-01-25 | 长沙中联重工科技发展股份有限公司 | Conveying tank and manufacturing method thereof, and pumping equipment with conveying tank |
| CN101450577B (en) * | 2007-11-29 | 2012-03-28 | 比亚迪股份有限公司 | Method for forming multi-color cladding coat |
| WO2013053097A1 (en) * | 2011-10-10 | 2013-04-18 | 长沙中联重工科技发展股份有限公司 | Conveying cylinder, method for manufacture thereof, and pumping equipment with same |
| CN103962519A (en) * | 2013-02-04 | 2014-08-06 | 青海聚能钛业有限公司 | Energy-saving crystallizer |
| CN105170922A (en) * | 2015-10-19 | 2015-12-23 | 姜少群 | Crystallizer copper tube with elemental nickel transition layer |
| CN108823612A (en) * | 2018-06-29 | 2018-11-16 | 长沙大力神液压工程有限公司 | A kind of inner hole of workpiece hard chrome electroplating solution and its electroplating technology |
| CN109097805A (en) * | 2018-08-02 | 2018-12-28 | 哈尔滨飞机工业集团有限责任公司 | A kind of chrome-plated process method |
| CN109402690A (en) * | 2018-12-12 | 2019-03-01 | 东莞市同欣表面处理科技有限公司 | A kind of layers of copper activator and the preparation method and application thereof method |
| CN113388832A (en) * | 2021-05-24 | 2021-09-14 | 浙江大学 | Copper-based composite material with high-hardness conductive surface and laser additive manufacturing method thereof |
-
2005
- 2005-12-09 CN CN 200510048181 patent/CN1804144A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100463742C (en) * | 2007-04-19 | 2009-02-25 | 武汉钢铁(集团)公司 | Crystallizer having a plating layer |
| CN101450577B (en) * | 2007-11-29 | 2012-03-28 | 比亚迪股份有限公司 | Method for forming multi-color cladding coat |
| CN101555614B (en) * | 2008-04-11 | 2011-03-30 | 深圳富泰宏精密工业有限公司 | Plastic surface galvanizing method |
| CN102330127A (en) * | 2011-10-10 | 2012-01-25 | 长沙中联重工科技发展股份有限公司 | Conveying tank and manufacturing method thereof, and pumping equipment with conveying tank |
| CN102330127B (en) * | 2011-10-10 | 2012-12-05 | 中联重科股份有限公司 | Conveying cylinder, preparation method thereof and pumping equipment comprising conveying cylinder |
| WO2013053097A1 (en) * | 2011-10-10 | 2013-04-18 | 长沙中联重工科技发展股份有限公司 | Conveying cylinder, method for manufacture thereof, and pumping equipment with same |
| CN103962519A (en) * | 2013-02-04 | 2014-08-06 | 青海聚能钛业有限公司 | Energy-saving crystallizer |
| CN105170922A (en) * | 2015-10-19 | 2015-12-23 | 姜少群 | Crystallizer copper tube with elemental nickel transition layer |
| CN105170922B (en) * | 2015-10-19 | 2017-12-01 | 重庆天春科技有限公司 | A kind of crystallizer copper pipe with elemental nickel transition zone |
| CN108823612A (en) * | 2018-06-29 | 2018-11-16 | 长沙大力神液压工程有限公司 | A kind of inner hole of workpiece hard chrome electroplating solution and its electroplating technology |
| CN109097805A (en) * | 2018-08-02 | 2018-12-28 | 哈尔滨飞机工业集团有限责任公司 | A kind of chrome-plated process method |
| CN109402690A (en) * | 2018-12-12 | 2019-03-01 | 东莞市同欣表面处理科技有限公司 | A kind of layers of copper activator and the preparation method and application thereof method |
| CN113388832A (en) * | 2021-05-24 | 2021-09-14 | 浙江大学 | Copper-based composite material with high-hardness conductive surface and laser additive manufacturing method thereof |
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Open date: 20060719 |