CN1048761C - High-temperature ultrasonic immersion plating method for metal surface - Google Patents
High-temperature ultrasonic immersion plating method for metal surface Download PDFInfo
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- CN1048761C CN1048761C CN97115732A CN97115732A CN1048761C CN 1048761 C CN1048761 C CN 1048761C CN 97115732 A CN97115732 A CN 97115732A CN 97115732 A CN97115732 A CN 97115732A CN 1048761 C CN1048761 C CN 1048761C
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- ultrasonic
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- coating
- immersion plating
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- 238000007747 plating Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000007654 immersion Methods 0.000 title claims abstract description 17
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 10
- 239000002184 metal Substances 0.000 title claims abstract description 10
- 230000008569 process Effects 0.000 claims abstract description 19
- 238000005406 washing Methods 0.000 claims abstract description 5
- 238000000576 coating method Methods 0.000 claims description 29
- 229910052782 aluminium Inorganic materials 0.000 claims description 28
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 28
- 239000011248 coating agent Substances 0.000 claims description 27
- 239000004411 aluminium Substances 0.000 claims description 25
- 238000002791 soaking Methods 0.000 claims description 5
- 238000003672 processing method Methods 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 238000001816 cooling Methods 0.000 abstract description 2
- 238000001035 drying Methods 0.000 abstract description 2
- 230000018044 dehydration Effects 0.000 abstract 1
- 238000006297 dehydration reaction Methods 0.000 abstract 1
- 238000005554 pickling Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 23
- 229910000831 Steel Inorganic materials 0.000 description 13
- 239000010959 steel Substances 0.000 description 13
- 239000010410 layer Substances 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 6
- 230000004907 flux Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 238000005269 aluminizing Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000007716 flux method Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000009736 wetting Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000002203 pretreatment Methods 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910015372 FeAl Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 210000001787 dendrite Anatomy 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000002525 ultrasonication Methods 0.000 description 1
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Abstract
A metal surface high-temperature ultrasonic immersion plating method comprises the following process steps of workpiece dehydration, washing, pickling, washing, plating assisting, drying, ultrasonic immersion plating, air cooling, post-treatment and washing, and is characterized in that: the ultrasonic immersion plating step is that an ultrasonic field is applied to the workpiece through the plating solution in the immersion plating process, and the ultrasonic field is directly applied to the workpiece after the plating solution is extracted from the workpiece. The process has the advantages of less equipment investment, simple operation, low cost and excellent corrosion resistance.
Description
The present invention relates to the hot dip process technology of metallic surface, a kind of metallic surface pyritous ultrasonic coating method is provided especially.
After aluminizing in the steel surface, not only the intensity of the solidity to corrosion of aluminium and steel is combined, but also give this kind material with new performance---thermotolerance.Thereby Aluminium Coated Steel with its characteristics of high quality and at a reasonable price, is widely used in fields such as petrochemical complex, electric power, metallurgy and communications and transportation as new and effective steel.Developed into Sendzimir method and flux method two big systems at present on technology, the former is under the protection of reducing atmosphere, steel part is directly sent into carried out plating in the molten aluminum liquid.Because require the serialization of immersion plating process, so equipment used is very complicated, the mechanization degree height costs an arm and a leg; The latter is to use special-purpose plating assistant agent and surperficial flux, is commonly called as flux method.In technology, at first steel part is carried out pre-treatment, dip-coating plating assistant agent on the steel surface that purifies is not oxidized with protection plating piece surface then.When steel part being immersed in the aluminium liquid that is coated with melt surface flux, the plating assistant agent film on steel surface then melts voluntarily and removes, and wetting by aluminium liquid institute at once.This method is simple, and equipment price is low, but because imperfection is gone back in the selection of various flux, and the lack of homogeneity of coating especially when the aging and crust of surperficial flux, will cause the metallic surface plating leakage serious, make quality of coating be difficult for assurance.In order to address this problem; once the someone mentioned ultrasonic field was introduced immersion plating technology, and concrete process is directly ultrasonic field to be put on the steel wire, and steel wire itself is aluminized; but steel wire still is in soaking the aluminium process in the protection of reducing atmosphere, and the investment of equipment is very big.And the aging incrustive problem of surperficial flux of soaking aluminium at the flux method suitable method of none still.
The object of the present invention is to provide a kind of method for high temperature ultrasonic coating on metal surface, with the hot dip process workpiece of this method preparation, quality of coating is good, and the immersion plating time is short, thereby reduces the technology cost.
The invention provides a kind of method for high temperature ultrasonic coating on metal surface, technological process is that workpiece takes off-washes-pickling-wash-help plating-oven dry-ultrasonic coating-air cooling-aftertreatment-washing, it is characterized in that: wherein said ultrasonic coating step is by plating bath workpiece to be applied ultrasonic field in the immersion plating process, after workpiece proposes plating bath, directly workpiece is applied ultrasonic field.
When the metallic surface is ultrasonic when soaking aluminium, processing method is: 1. put on the ultrasonic of plating bath, ultrasonic frequency is 20～28KHZ, and power is every square metre of plating bath area 5～7KW, 1～5 minute immersion plating time; 2. put on ultrasonic on the workpiece, ultrasonic frequency is 20～28KHZ, and power is the long-pending 4～5KW of every square metre of workpiece surface, 0.5～3 minute time.
When ultrasonic by horn terminal introduce in the liquid medium right, because the effect of acoustic pressure, the liquid part is subjected to tensile stress, under stronger action of pulling stress, occur numerous air-bubble in the liquid, these bubbles are very unstable, under the effect of acoustic pressure, numerous air-bubble can expand into 100～1000 times of original dimensions rapidly, and vanishes instantaneous.When bubble-break, the liquid regional area produces the moment High Temperature High Pressure, and temperature can reach thousands of degree, pressure can reach 500～1000MPa, but the time length have only several nanoseconds, the highly compressed result makes liquid produce assemble jet, flow velocity reaches 50～100m/s, and this phenomenon is called ultrasonic cavitation.The present invention at first utilizes this phenomenon with in the ultrasonic introducing metal melt, the high temperature that cavitation forms helps promoting the wetting of liquid metal and workpiece, high-pressure spray makes that the accumulative liquid flow constantly is infiltrated up to workpiece surface in the tiny area, and it is compound that workpiece and metal melt are realized fast.As everyone knows, in the alloy crystallisation process, import ultrasonic wave, can make the leading broken refinement of primary phase, eutectic phase of alloy, thereby the refinement alloy structure, make the mechanical property of alloy that in various degree raising be arranged.The present invention utilizes hyperacoustic this character again, leaves plating bath at workpiece, in the coating process of setting, directly workpiece is applied ultrasonic wave, thereby improves the quality of coating.The present invention has following advantage in a word: (1) impels the form of coating to distribute along dendrite or crystal boundary in two ultrasonic fields of conversion, forms continuous, uniform nethike embrane, thereby improves coating plasticity; (2) propose the hot-dip coated novel method of ultrasonic field, established the basis of no flux immersion plating, coating can be solidified under the ultrasonic wave effect, can improve the wetting property between metal and plating bath, save for 60% hot dip aluminum plating time; (3) can not be subjected to the quantitative limitation of material carbon containing, the immersion plating process is realized easily.
Below by embodiment in detail the present invention is described in detail.
Accompanying drawing 1 is the ultrasonic coating device.
Accompanying drawing 2 is without supersound process coating cross section.
Accompanying drawing 3 is through supersound process coating cross section.
Accompanying drawing 4 is the time and the thickness relationship curve of coating.
Embodiment 1
The ultrasonic coating device as shown in Figure 1, horn 6 and ultrasonic transducer 7 adopts mechanical systems closely to be connected, and is connected as a single entity with hydraulic stem 4.Under the effect of control motor 1, hydraulic stem 4 is driven between horn 6, transverter 7 and the control motor 1 along hydraulic prop 2 do relative movement.Ultrasonic transducer 7 links together by coupling spindle 5 with hydraulic stem 4, and can be that relative movement is done in the axle center with coupling spindle 5.Horn 6 moves downward with aluminium liquid 3 and contacts under the drive of control motor 1, and with the transmission ofenergy of ultrasonic transducer 7 to aluminium liquid 3, aluminium liquid 3 is in the environment of ultrasonic field.
When workpiece enters in the aluminium liquid by the surface of aluminium liquid 3, can realize just that by changing hyperacoustic power workpiece is by the transformation of cleaning to the immersion plating process.After workpiece left aluminium liquid 3, transverter 7 upwards promoted with hydraulic stem 4 with horn 6, also leaves aluminium liquid 3.Simultaneously, because 3 radiation of aluminium liquid and temperature when too high, also transverter 7 can be continued with coupling spindle 5 be upwards rotation of axle center, and is 180 ° between the hydraulic stem 4, makes the surface of transverter 7 away from aluminium liquid 3, to reach the purpose of cooling when ultrasonic transducer 7.
Sample is the Q235 steel of 100 * 50 * 2mm, behind the fine aluminium liquid under the effect of workpiece immersion ultrasonic field, the control ultrasonic frequency is 20KHZ, power is every square meter plating bath area 5KW, 1.5 minutes immersion plating time, workpiece is proposed aluminium liquid, again workpiece surface is applied ultrasonic field, ultrasonic field frequency 20KHZ, every square metre of workpiece power 5KW, 0.5 minute time.Finally forming internal layer at specimen surface is the ferroaluminium layer, and skin is the composite deposite of aluminium base coating.
Add the alloying element rare earth in above-mentioned plating bath, composition is Al-0.5 Re wt%, and other all is same as embodiment 1.As shown in Figure 2, be the coating cross section structure without supersound process, Fig. 3 is the cross section structure through supersound process.As seen, when the components unchanged of plating bath, temperature, time one, regularly it was netted that supersound process makes the structural modification of coating, thereby can improve the toughness of coating, especially can significantly improve the solidity to corrosion of coating in ocean environment.
Embodiment 3
Select the special-purpose w-type guardrail plate of motorway for use, material is B
2F, profile length is 4320mm, flatten width 500mm, wall thickness is 4.0mm, solution composition is Al-3%Si-0.5%Re, in advance through degreasing, it is to carry out pre-treatment in 80 ℃ the quickening liquid that w-type guardrail plate that processing of rust removing is crossed immerses temperature, immerse after the drying in 720 ℃ the molten aluminum liquid, apply ultrasonic field then, frequency 26KW, power is every square meter plating bath 6KW, time is 2.5min, again with the speed of 6m/min with the w-type guardrail plate by proposing in the aluminium liquid, on the w-type guardrail plate, apply the assisting ultrasonic field simultaneously, frequency 26KHZ, power on every square metre of workpiece is 3.7KW, and time 1min is to guarantee that not solidifying aluminium lamination solidifies under ultrasonication, soak the w-type guardrail plate any surface finish densification that aluminium was handled, no plating leakage through ultrasonic, false plating phenomenon.Show by structure observation, soak aluminium lamination and form by upper layer and transition layer to the coating cross section.The tissue of upper layer mainly is that α-AI (wherein has small amount of Fe Al
3Spicule is separated out), with soaking aluminium time lengthening, FeAl
3Amount increases.The tissue of transition layer is mainly by Fe
2Al
5And small amount of Fe Al forms.The about 30 μ m of surface layer thickness, the about 50 μ m of transition region thickness.After 300 hours the salt-fog test, coating non-corroding point.
The workpiece hot aluminizing time is long more, and thickness of diffusion layer is big more, and according to curve as shown in Figure 4, may command obtains the coating of a certain specific thicknesses.Obtain the composite deposite that best upper layer and transition layer match.
Technology of the present invention has few, the simple to operate advantage of equipment investment, and cost is low, and excellent corrosion resistance can be molten Increase ultrasonic facility on the agent method hot aluminizing production line and can realize having general using value, its economy, society Remarkable benefit.
Claims (2)
1. method for high temperature ultrasonic coating on metal surface,--washing--pickling--washing----oven dry--ultrasonic coating-air cooling-aftertreatment-washing that helps plating that technological process is that workpiece takes off, it is characterized in that: wherein said ultrasonic coating step is by plating bath workpiece to be applied ultrasonic field in the immersion plating process, after workpiece proposes plating bath, directly workpiece is applied ultrasonic field.
2. according to the described method for high temperature ultrasonic coating on metal surface of claim 1, it is characterized in that: when the metallic surface is ultrasonic when soaking aluminium, processing method is: 1. put on the ultrasonic of plating bath, ultrasonic frequency is 20～28KHZ, power is every square metre of plating bath area 5～7KW, 1～5 minute immersion plating time; 2. put on ultrasonic on the workpiece, ultrasonic frequency is 20～28KHZ, and power is the long-pending 4～5KW of every square metre of workpiece surface, 0.5～3 minute time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97115732A CN1048761C (en) | 1997-08-20 | 1997-08-20 | High-temperature ultrasonic immersion plating method for metal surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97115732A CN1048761C (en) | 1997-08-20 | 1997-08-20 | High-temperature ultrasonic immersion plating method for metal surface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1178255A CN1178255A (en) | 1998-04-08 |
| CN1048761C true CN1048761C (en) | 2000-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97115732A Expired - Fee Related CN1048761C (en) | 1997-08-20 | 1997-08-20 | High-temperature ultrasonic immersion plating method for metal surface |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100402217C (en) * | 2004-05-08 | 2008-07-16 | 房山区良乡永固福利电力金具制造厂 | Ultrasonic tinning of current-carrying armout-clamp, and bivariate composite adhering for copper-aluminium transition current-carrying armour clamp |
| KR101245481B1 (en) | 2011-12-14 | 2013-03-25 | 엘에스산전 주식회사 | Motor starter module |
| CN105274519B (en) * | 2015-01-13 | 2018-05-04 | 珠海罗西尼表业有限公司 | The surface treatment method and stainless steel Watchcase of stainless steel |
| CN107245740A (en) * | 2017-05-12 | 2017-10-13 | 江苏双汇电力发展股份有限公司 | The hot-dip aluminizing technique of the energy-saving anti-corrosion gold utensil of overhead transmission line |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6314848A (en) * | 1986-07-08 | 1988-01-22 | Nippon Steel Corp | Method for coating material onto steel sheet |
| JPH04365846A (en) * | 1991-06-12 | 1992-12-17 | Nippon Steel Corp | Continuous galvanizing device for steel strip |
| CN1132266A (en) * | 1995-03-25 | 1996-10-02 | 中国人民解放军国防科学技术大学 | Supersonic fast thermal soaking plating |
-
1997
- 1997-08-20 CN CN97115732A patent/CN1048761C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6314848A (en) * | 1986-07-08 | 1988-01-22 | Nippon Steel Corp | Method for coating material onto steel sheet |
| JPH04365846A (en) * | 1991-06-12 | 1992-12-17 | Nippon Steel Corp | Continuous galvanizing device for steel strip |
| CN1132266A (en) * | 1995-03-25 | 1996-10-02 | 中国人民解放军国防科学技术大学 | Supersonic fast thermal soaking plating |
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| Publication number | Publication date |
|---|---|
| CN1178255A (en) | 1998-04-08 |
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