CN85107971A - The special welding rod of aluminium-coated steel - Google Patents
The special welding rod of aluminium-coated steel Download PDFInfo
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- CN85107971A CN85107971A CN85107971.7A CN85107971A CN85107971A CN 85107971 A CN85107971 A CN 85107971A CN 85107971 A CN85107971 A CN 85107971A CN 85107971 A CN85107971 A CN 85107971A
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- aluminium
- welding rod
- coating
- weld
- coated steel
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Abstract
The special welding rod of aluminium-coated steel.Welding coating thickness must be removed the aluminium coating of groove face and weld edge in the industry before weldering at the aluminium-coated steel more than the 0.2mm.Welding rod of the present invention is used to weld the structure that at least one side is an aluminium-coated steel, be not more than the aluminium-coated steel of 0.5mm for aluminium coating thickness, the aluminium coating that needn't remove groove face and weld edge before the weldering can directly weld, and can make weld seam have the performance such as heat-resisting, anti-corrosion, wear-resisting that adapts with aluminium-coated steel.Its technical characterictic is: killing not fully not only in the coating has added oxidant on the contrary.
Description
The present invention relates to a kind of aluminium by the special welding rod of multiple steel.
Aluminium is had good performance such as heat-resisting, anti-corrosion, wear-resisting by multiple steel (comprise ooze, aluminium spraying).But the difficulty of welding has limited applying of it greatly.
The welding rod that adopts common coating and core wire to form, the aluminium of removing groove face and weld edge before needing to weld could be welded by multiple layer.In the time of must keeping Weld Performance, postwelding also will be again by multiple aluminium.
Notice this problem 1977.7.14 be entitled as the invention of " the arc welding material of aluminium cladding steel " in the Japanese patent gazette of day, the way of employing is " using as deoxidier with the aluminium that is cladded ".In fact, just reduced the content of deoxidier in the coating, thereby successfully welded by the multiple steel of aluminium quilt of multiple layer thickness less than 0.2mm.
Because the restriction of production technology and application requirements, practical aluminium is many at 0.3～0.5mm by multiple layer thickness by the aluminium of multiple steel, so this patent is in practicality, as the aluminium of not removing groove face and weld edge before welding the existing problem of common welding rod: 1.Al still can be occurred by the just directly welding of multiple layer
2O
3Sneak into slag, make the mobile variation of slag, take off the slag difficulty, appearance of weld degenerates, thereby worsens usability of electrode energy, operating difficulties.2. after the Al of volume infiltrates weld seam, not only make weld metal crystal grain thick, plasticity, impatient acute decline of Toughness, and also to form decarburized layer in melt run near weld seam one side be the ferrite banding tissue, further worsens the weld seam mechanical performance.So, to by the aluminium of multiple layer thickness more than 0.3mm by multiple steel, if the aluminium of not removing groove face and weld edge before weldering by multiple layer, industrially still can't weld so far.
Task of the present invention is to provide that a kind of to be used to weld at least one side be that aluminium is during by the structure of multiple steel, the aluminium that needn't remove groove face and weld edge place before the weldering is by multiple layer, can direct welding of aluminum be reached aluminium about 0.5mm by the welding rod of steel again by multiple layer maximum ga(u)ge.Require weld seam to have the performance such as heat-resisting, anti-corrosion, wear-resisting that is adapted by multiple steel with aluminium simultaneously.
Task of the present invention is finished by following scheme: not only do not add requisite deoxidier in the traditional concept in the electrode coating fully, added unexistent oxidant in a certain amount of traditional concept that adapts with the multiple layer thickness of aluminium quilt on the contrary, make in the welding process, aluminium in the multiple layer of quilt is except that a part gives over to the deoxidier utilization, all the other major parts are oxidant institute oxidization burning loss, simultaneously infiltrated micro-aluminium to weld seam, not only can not reduce the mechanical performance of weld seam, and help improving heat-resisting, the corrosion resisting property of weld seam.Thereby successfully overcome a difficult problem that exists in the prior art.In order to make weld seam obtain the performance such as heat-resisting, anti-corrosion, wear-resisting that is adapted by multiple steel with aluminium, the present invention has adopted the method that adds alloying constituent in coating.Details of the present invention provides from embodiment.
Among the embodiment that the inventor did, the core wire of welding rod is common HO8A steel wire, and the percentage by weight of each component is in the coating: (Main Ingredients and Appearance is 8～20% ilmenite: TiO
2About 48%, FeO+Fe
2O
3About 50%).Purpose is to improve the oxidisability of welding rod.Dosage is too high, and the welding rod oxidisability is too strong; Dosage is too low, and then Al content is too big in the weld seam.Concrete dosage is decided by multiple layer thickness on aluminium.For guaranteeing Mn, the Si content in the weld metal, the Mn powder of adding 2～4% and 1～2% Si-Fe are as alloying constituent.CaCO
3Addition be 25～65%, dosage is too high, then too high fluidity is bad for the slag fusing point.Too low, then the basicity of slag is too low, the bad easy generation hydrogen of appearance of weld, nitrogen pore.CaF
2Addition be 10～35%, CaF
2As the shoddye agent, the too high or too low processing property of electrode that all can make of dosage worsens.For suppressing to produce the ferrite banding tissue in the weld seam, the Mo-Fe of adding 1～3% and 1～3% V-Fe form the effect that carbide plays fixed carbon during high temperature.Add 0.5～1.5% Na again
2CO
3To improve extrusion.Add 4～8% synthetic rutile at last, with comprehensive adjustment usability of electrode energy, dosage is too high, and slag is thinning, and too low then slag is topped bad, and moulding is poor, takes off the slag difficulty.
Each weight percentages of components contrast in welding rod of the present invention and the Japan Patent electrode coating: (%)
Composition welding rod day of the present invention the patent welding rod
CaCO
349 59
CaF
221 21
Ilmenite 15 (mica) 2.5
Synthetic rutile 85
Mn powder 3 (ZrSiO
4) 2～5
45
＃Si-Fe 1 8
Mo-Fe 1 （MgO）1.5
V-Fe 2
Na
2CO
31 0.5
Last table is as can be seen: deoxidier Si-Fe is 8% in the Japan Patent welding rod, than common welding rod deoxidier dosage much less.1% Si-Fe and 3% Mn powder add as alloying constituent in the present embodiment, and it is inappreciable comparing with 15% the ilmenite that adds as oxidant.In welding process, rise deoxidation by the aluminium in the multiple layer.
Welding rod of the present invention compares with day every performance of patent welding rod
The present invention is welded mother metal and core wire chemical analysis percentage by weight:
C Mn Si S P aluminium is by multiple layer
Aluminium is by multiple steel 0.18 0.55 0.26 0.015 0.023 0.5mm
Core wire 0.085 0.45 vestige 0.020 0.0100
Described in the scheme " alloying constituent that adds for the performance such as heat-resisting, anti-corrosion, wear-resisting that makes weld seam obtain being adapted by multiple steel with aluminium is following content:
1. add a certain amount of chromium, molybdenum, vanadium alloy agent in the coating, can improve weld seam at H
2S, H
2, N
2, SO
2, SO
3Following and the H Deng gas condition
2S, CO
2Aqueous conditions under resistance to corrosion, simultaneously operating temperature can be brought up to 520 ℃.
2. add a certain amount of graphite and chromium, molybdenum, vanadium alloy agent in the coating, except the resistance to corrosion that can improve weld seam, weld hardness can be brought up to HRC40, thereby can improve the wearability of weld seam.
3. add a certain amount of chromium, molybdenum, copper alloy agent in the coating, can improve the ability of anti-industrial atmosphere of weld seam and rural area atmospheric corrosion.
The present invention compared with prior art has obvious superiority: when at least one side of welding was the structure of the multiple steel of aluminium quilt, the aluminium that needn't remove groove face and weld edge before the weldering can directly be welded by multiple layer, for site operation provides great convenience.On the other hand, owing to can bevel can be finished in rolling process, help again producing in enormous quantities by multiple aluminium behind bevel.The aluminium that can directly weld is brought up to 0.5mm by the maximum ga(u)ge of multiple layer, has satisfied industrial requirement fully.
The present invention is used in test weld station boiler aluminising water screen tube Fin sheet, has obtained the more satisfied effect of order.
The International Transaction meeting that will hold requires aluminising steel mill must have supporting welding rod and alumetized steel product to put on display simultaneously, and the alumetized steel that preparation is applied to Chinese Central Television's television antenna tower also needs supporting with it welding rod.For this reason, the requirement the present invention that also comes of aluminising steel mill gives to support.
Claims (5)
1, a kind of aluminium is made up of coating and core wire by the special welding rod of multiple steel.It is characterized in that in the coating not only fully not killing, and added in welding process can scaling loss aluminium by the oxidant of the aluminium in the multiple layer.
2, a kind of welding rod according to claim 1, it is characterized in that: the percentage by weight of each component is in the coating:
CaCo
325～65%
CaF
210～35%
Ilmenite 8～20%
Synthetic rutile 4～8%
Mn powder 2～4%
Si-Fe 1～2%
Mo-Fe 1～3%
V-Fe 1～3%
Na
2CO
30.5～1.5%
3, a kind of welding rod according to claim 1 is characterized in that: added a certain amount of chromium, molybdenum, vanadium alloy agent in the coating.
4, a kind of welding rod according to claim 3 is characterized in that: added a certain amount of graphite in the coating.
5, a kind of welding rod according to claim 1 is characterized in that: added a certain amount of chromium, molybdenum, copper alloy agent in the coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85107971 CN1010393B (en) | 1985-10-24 | 1985-10-24 | Special welding rod for aluminium-coated steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85107971 CN1010393B (en) | 1985-10-24 | 1985-10-24 | Special welding rod for aluminium-coated steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85107971A true CN85107971A (en) | 1987-05-06 |
| CN1010393B CN1010393B (en) | 1990-11-14 |
Family
ID=4795843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85107971 Expired CN1010393B (en) | 1985-10-24 | 1985-10-24 | Special welding rod for aluminium-coated steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1010393B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102974958A (en) * | 2012-11-23 | 2013-03-20 | 武汉铁锚焊接材料股份有限公司 | Welding rod matched with steel for hot galvanizing pot |
| CN109773372A (en) * | 2019-03-04 | 2019-05-21 | 辽宁工程技术大学 | A kind of manual electric arc welding coating of build-up welding bar formula and welding rod preparation method |
-
1985
- 1985-10-24 CN CN 85107971 patent/CN1010393B/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102974958A (en) * | 2012-11-23 | 2013-03-20 | 武汉铁锚焊接材料股份有限公司 | Welding rod matched with steel for hot galvanizing pot |
| CN109773372A (en) * | 2019-03-04 | 2019-05-21 | 辽宁工程技术大学 | A kind of manual electric arc welding coating of build-up welding bar formula and welding rod preparation method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1010393B (en) | 1990-11-14 |
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