CN102773634B - Welding rod for wet underwater welding of low alloy steel - Google Patents
Welding rod for wet underwater welding of low alloy steel Download PDFInfo
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- CN102773634B CN102773634B CN201210245220.1A CN201210245220A CN102773634B CN 102773634 B CN102773634 B CN 102773634B CN 201210245220 A CN201210245220 A CN 201210245220A CN 102773634 B CN102773634 B CN 102773634B
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Abstract
The invention introduces a welding rod for wet underwater welding of low alloy steel, which adopts a commercially available H08E steel wire as welding core, adopts coating transition alloy elements, adopts water glass as binder, and has waterproof insulation varnish coated on the surface of the coating. The coating contains the following solid parts (by weight): 40-48% of rutile, 5-8% of marble, 15-20% of potassium feldspar, 5-10% of microcrystalline cellulose, 6-10% of titanium dioxide, 8-12% of high carbon ferromanganese and 6-12% of iron powder. When the inventive welding rod is used for low alloy steel welding, deposited metal tensile strength can reach 460MPa or above; for welding in water, arcing is easy, electric arc burning is stable, arc re-striking performance is good, deslagging is easy, and the welded seam is good in appearance; the waterproof and insulating performance of the coating are good, and the coating is unlikely to deteriorate and fall off in case of long-time soaking; and the welding rod production process is simple and the cost is low.
Description
Technical field
The present invention relates to a kind of field of welding material technology, particularly a kind of welding rod for low-alloy steel wet method Underwater Welding.
Background technology
Wet method Underwater Welding is indispensable important process means during the installation, maintenance of Underwater Engineering Structure is constructed.They are often used in the work progress of the ocean engineerings such as marine salvage, marine energy, marine mining and Large Underwater facility.During " 12 ", country will aspect ocean engineering and port facilities, continue strengthen dynamics of investment, to the demand of wet method Underwater Welding material also by increasing.The domestic welding electrodes for underwater construction mainly contains TS202, the TS202A that TS203 and middle ship heavy industry 725 are developed at present.Wherein the intensity rank of TS202, TS203 and TS202A welding rod is lower, and the Underwater Welding that is mainly applicable to Q235 and mild steel is used.And also there is no suitable welding material at present for the low-alloy steel Underwater Welding of the higher general structure of intensity rank is domestic.External wet method Underwater Welding material mainly contains the Hydroweld FS underwater electrode of Hydroweld company of Britain development and production, 7018 ' S underwater electrode of U.S.'s development and production, above welding rod all can be used for the Underwater Welding of low-alloy steel, but price is more than 500,000 yuan/ton, expensive.The domestic granted patent relating to has: a kind of Wet Welding Electrode (application number: 200810141292), the welding rod that this patent is mentioned makees binding agent with phenolic resins, and intensity is lower; The external Patents that relates to underwater electrode that do not retrieve.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of welding rod for low-alloy steel wet method Underwater Welding, when this welding rod is used for low-alloy steel Underwater Welding, water resistance and insulating properties are good, welding technological properties excellence, deposited metal tensile strength >=460MPa, can all-position welding, be specially adapted to vertical welding downwards, meet the requirement of ocean engineering general structure Underwater Welding, and production technology is reasonable, manufacturing cost is lower.
In order to realize the object solving the problems of the technologies described above, the present invention has adopted following technical scheme:
A kind of welding rod for low-alloy steel wet method Underwater Welding of the present invention, comprises and adopts the H08E steel wire of the commercially available GB/T3429 of meeting requirement as core wire; Adopt coating transition alloy elements; Adopt light water glass as binding agent, use common welding rod extrusion production line extrusion to become welding rod; Finally apply the commercially available waterproof insulation varnish of one deck on coating surface, it is characterized in that: solid part composition and the percentage by weight of coating: rutile 40 ~ 48%, marble 5 ~ 8%, potassic feldspar 15 ~ 20%, microcrystalline cellulose 5 ~ 10%, titanium dioxide 6 ~ 10%, high carbon ferromanganese 8 ~ 12%, iron powder 6 ~ 12%.
Concrete, described microcrystalline cellulose is that native cellulose is hydrolyzed the particulate powder product that makes molecular weight be reduced to certain scope in acid medium.Microcrystalline cellulose is can the non-fibrous particulate of free-pouring crystallization.
Wherein, described high carbon ferromanganese: Mn >=75%, C≤7.5%, Si≤1.5%.
Further concrete, described coating raw material technical requirement is as follows: rutile: TiO
2>=95%, S≤0.03%, P≤0.03%, 100% several granularities of looking over so as to check are 80 orders; Marble: CaCO
3>=95%, S≤0.03%, P≤0.03%, 100% several granularities of looking over so as to check are 60 orders; Potassic feldspar: SiO
2: 63 ~ 73%, Al
2o
3: 15 ~ 24%, K
2o+Na
2o>=12%, K
2o>=8%, S≤0.04%, P≤0.04%; Microcrystalline cellulose: cellulose>=87%: titanium dioxide: TiO
2>=98%, S≤0.05%, P≤0.05%, 100% several granularities of looking over so as to check are 200 orders; High carbon ferromanganese: Mn>=75%, C≤7.5%, Si≤1.5%, S≤0.03%, P≤0.20%, 100% several granularities of looking over so as to check are 40 orders; Iron powder: Fe>=98%, Mn≤0.45%, S≤0.003%, P≤0.013%, 100% several granularities of looking over so as to check are 40 orders.
100% of this patent several granularities of looking over so as to check, refer to that raw material can 100% can pass through the sieve of this order number.
In the present invention, rutile is one of chief component thing in coating, and it adds scope is 40%～48%.Within the scope of this, can ensure the burning of Underwater Welding arc stability.When rutile is lower than 40% time, arc stability variation, cannot welding in vertical position of welding.In the time that rutile addition exceedes 48%, welding arc can be shaken, drift about, and welding fabrication worsens, and the mechanical property of butt welded seam causes adverse effect simultaneously.
In the present invention, marmorean addition is 5 ~ 8%, and marble belongs to gas making, slag former on the one hand, can also heighten on the other hand the viscosity of slag, highly beneficial to vertical position welding.When marmorean content is too low, cannot play the effect that improves viscosity coefficient of dross, when content exceedes 8%, speed of welding is slack-off, and appearance of weld is poor.
While adding a certain amount of potassic feldspar can make welding rod extrusion in the present invention, have good plasticity and elasticity, potassic feldspar also has the effect of stabilising arc simultaneously.But when potassic feldspar content exceedes 20%, viscosity coefficient of dross significantly declines, appearance of weld variation, de-slag difficulty.In order to improve welding rod extrusion processing performance, consider adverse effect when potassic feldspar is too much simultaneously, its suitable addition scope is 15 ~ 20%.
Microcrystalline cellulose is mainly gas making, stabilising arc, increases blow force of arc when Underwater Welding, and can improve the extrusion performance of welding rod.Suitable addition is 5 ~ 10%.
In the present invention, the addition of titanium dioxide is controlled at 6 ~ 10%, and titanium dioxide can make coating have good plasticity, improves welding rod extrusion technique, but consumption is unsuitable too much, otherwise not only cost is high but also can reduce the plasticity of weld seam, causes weld cracking.
High carbon ferromanganese, mainly as deoxidier, also has certain alloying effect.In addition, the deoxygenation of manganese belongs to exothermic reaction, improves bath temperature, is conducive to metallurgical reaction.When addition is too much, deoxidation causes excessively by force face of weld deterioration.Otherwise high carbon ferromanganese is very few, because molten bath heat causes poor fluidity not, unfavorable to welding operation and metallurgical reaction, also can cause that weld joint mechanical performance reduces simultaneously.
The object that adds iron powder in the present invention is to improve the underwater restarting of welding rod and improve welding efficiency.When addition exceedes 12%, can make extrusion and the welding technological properties variation of welding rod, also can strengthen the diluting effect of other element simultaneously.
By adopting technique scheme, the welding rod for low-alloy steel wet method Underwater Welding of the present invention has following features:
(1) while welding for low-alloy steel, more than deposited metal tensile strength can reach 460MPa.
(2) while welding in seawater or fresh water, the starting the arc is easy, arc burning is stable, and restarting is functional, and de-slag is easy, and appearance of weld is attractive in appearance, has good Underwater Welding processing performance.
(3) welding rod waterproof coating has excellent waterproof insulation performance, and in seawater or fresh water, after long-time immersion, coating does not occur rotten and comes off, and still can carry out welding operation, and obtains satisfied seam organization.
(4) welding rod production technology is simple, and cost is lower.
Detailed description of the invention
Below in conjunction with embodiment, this patent is further explained.But the protection domain of this patent is not limited to concrete embodiment.Each embodiment all adopts H08E steel wire as core wire; Adopt solid content 25% light water glass as binding agent, use common welding rod extrusion production line extrusion to become welding rod; Finally apply waterproof insulation varnish on coating surface.Coating raw material meets technical scheme requirement.High carbon ferromanganese: Mn is 79%.
Table 1 embodiment 1-3 coating composition.
| Raw material title | Rutile | Marble | Potassic feldspar | Microcrystalline cellulose | Titanium dioxide | High carbon ferromanganese | Iron powder | Add up to |
| Embodiment 1 | 42% | 8% | 16% | 6% | 10% | 12% | 6% | 100% |
| Embodiment 2 | 40% | 7% | 15% | 10% | 7% | 9% | 12% | 100% |
| Embodiment 3 | 48% | 5% | 20% | 5% | 6% | 8% | 8% | 100% |
Implementation result is shown in table 2 and table 3.
The deposited metal composition (%) of table 2 embodiment
| Element | C | Mn | Si | S | P |
| Embodiment 1 | 0.106 | 0.387 | 0.316 | 0.014 | 0.026 |
| Embodiment 2 | 0.098 | 0.323 | 0.298 | 0.015 | 0.020 |
| Embodiment 3 | 0.122 | 0.312 | 0.348 | 0.017 | 0.021 |
The deposited metal mechanical property of table 3 embodiment
Claims (3)
1. for a welding rod for low-alloy steel wet method Underwater Welding, comprise and adopt the H08E steel wire of the commercially available GB/T3429 of meeting requirement as core wire; Adopt coating transition alloy elements; Adopt light water glass as binding agent, use common welding rod extrusion production line extrusion to become welding rod; Finally apply the commercially available waterproof insulation varnish of one deck on coating surface, it is characterized in that: solid part composition and the percentage by weight of coating: rutile 40 ~ 48%, marble 5 ~ 8%, potassic feldspar 15 ~ 20%, microcrystalline cellulose 5 ~ 10%, titanium dioxide 6 ~ 10%, high carbon ferromanganese 8 ~ 12%, iron powder 6 ~ 12%.
2. according to claim 1 for the welding rod of low-alloy steel wet method Underwater Welding, it is characterized in that: described high carbon ferromanganese Mn >=75%, C≤7.5%, Si≤1.5%.
3. according to claim 1 for the welding rod of low-alloy steel wet method Underwater Welding, it is characterized in that: described coating raw material technical requirement is as follows: rutile: TiO
2>=95%, S≤0.03%, P≤0.03%, 100% several granularities of looking over so as to check are 80 orders; Marble: CaCO
3>=95%, S≤0.03%, P≤0.03%, 100% several granularities of looking over so as to check are 60 orders; Potassic feldspar: SiO
2: 63 ~ 73%, Al
2o
3: 15 ~ 24%, K
2o+Na
2o>=12%, K
2o>=8%, S≤0.04%, P≤0.04%; Microcrystalline cellulose: cellulose>=87%; Titanium dioxide: TiO
2>=98%, S≤0.05%, P≤0.05%, 100% several granularities of looking over so as to check are 200 orders; High carbon ferromanganese: Mn>=75%, C≤7.5%, Si≤1.5%, S≤0.03%, P≤0.20%, 100% several granularities of looking over so as to check are 40 orders; Iron powder: Fe>=98%, Mn≤0.45%, S≤0.003%, P≤0.013%, 100% several granularities of looking over so as to check are 40 orders.
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| CN201210245220.1A CN102773634B (en) | 2012-07-16 | 2012-07-16 | Welding rod for wet underwater welding of low alloy steel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210245220.1A CN102773634B (en) | 2012-07-16 | 2012-07-16 | Welding rod for wet underwater welding of low alloy steel |
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| CN102773634A CN102773634A (en) | 2012-11-14 |
| CN102773634B true CN102773634B (en) | 2014-10-15 |
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| CN103240545A (en) * | 2013-05-30 | 2013-08-14 | 湖南工业大学 | Special A101 stainless steel welding electrode for decoration |
| CN103317261B (en) * | 2013-06-04 | 2015-07-29 | 华南理工大学 | A kind of low hydrogen type deep water welding electrodes |
| CN103447717B (en) * | 2013-07-30 | 2016-03-09 | 中国船舶重工集团公司第七二五研究所 | A kind of low-temperature steel welding low-alloy steel electrode |
| CN104002060B (en) * | 2014-06-18 | 2016-09-14 | 营口公牛机械设备有限公司 | A kind of welding rod |
| CN106583884B (en) * | 2016-11-18 | 2020-02-04 | 中车齐齐哈尔车辆有限公司 | Repair welding method |
| CN106514051A (en) * | 2016-12-08 | 2017-03-22 | 河海大学常州校区 | Underwater welding rod and manufacturing method thereof |
| CN108213760A (en) * | 2018-01-23 | 2018-06-29 | 刘希福 | Oxygen imderwater cutting item is exempted from a kind of manual metal-arc welding |
| CN109434323B (en) * | 2018-11-16 | 2021-02-23 | 山东省科学院海洋仪器仪表研究所 | Welding rod for underwater wet welding of low alloy steel |
| CN109530974B (en) * | 2018-12-29 | 2021-01-26 | 天津市金桥焊材集团股份有限公司 | High-performance rutile type carbon steel welding rod |
| CN115625449B (en) * | 2022-12-08 | 2023-03-10 | 山东聚力焊接材料有限公司 | High-cellulose welding rod and application thereof |
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| CN1939649A (en) * | 2005-09-30 | 2007-04-04 | 中国船舶重工集团公司第七二五研究所 | High-strength underwater welding electrodes |
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