CN109604868A - A kind of TIG soldering method for promoting welding penetration and preventing back oxidation - Google Patents
A kind of TIG soldering method for promoting welding penetration and preventing back oxidation Download PDFInfo
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- CN109604868A CN109604868A CN201910059137.7A CN201910059137A CN109604868A CN 109604868 A CN109604868 A CN 109604868A CN 201910059137 A CN201910059137 A CN 201910059137A CN 109604868 A CN109604868 A CN 109604868A
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- Prior art keywords
- protective agent
- tig
- welding
- thickness
- soldering method
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/3601—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with inorganic compounds as principal constituents
- B23K35/3607—Silica or silicates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Nonmetallic Welding Materials (AREA)
- Arc Welding In General (AREA)
Abstract
A kind of TIG soldering method for promoting welding penetration and preventing back oxidation; protective agent is constituted the following steps are included: 1) first reconcile powder and binder by the mass ratio of 1:4~6; then with acetone with the dilution proportion protective agent of 1.5~3:1, the powder includes following components by mass percentage: SiO220%~32%, CaF24%~10%, TiO225%~35%, MnO25%~12%, Mn 15%~30%, Si 16%~25%；2) then protective agent is brushed in weld bond front and the back side, front surface coated is with a thickness of 0.1mm, and backside coating is placed 5~10 minutes in air with a thickness of 2mm, then welding.The present invention can greatly improve TIG weldering fusion penetration, prevent back of weld from aoxidizing, improve the forming defects such as weld seam slag inclusion, stomata, burn-through, realize the stainless steel forming a solder of 5-10mm medium thickness.This method eliminates cumbersome multilayer welding process, reduces the production cycle, reduces energy consumption, and the forming quality that TIG is once welded greatly improved in save the cost.
Description
Technical field
The invention belongs to metal welding techniques fields, are related to a kind of welding side suitable for stainless steel and other high-alloy steel
A kind of method, and in particular to TIG soldering method for promoting welding penetration and preventing back oxidation.
Background technique
TIG weld head good quality, suitable for almost all metals and the alloy such as stainless steel, high temperature alloy, titanium alloy
Welding.But there is also some disadvantages for it, and when carrying out pipe fitting one side welding with back formation, insufficient (incomplete) penetration, welding efficiency are low to become prominent
It goes wrong.In addition, certain application scenarios that must use one side welding with back formation such as small diameter pipeline welding, plumb joint reverse side
High-temperature oxydation problem is very prominent, can seriously affect the mechanical property and corrosion resistance of connector, or even cause shaping surface bad, interior
The welding defects such as portion's slag inclusion influence the service performance of product.Therefore research and develop it is a kind of promotion welding penetration and prevent back oxidation
TIG soldering method is of great significance.
It for the application for expanding TIG weldering, needs to increase welding penetration, improves welding efficiency, coating activating agent is a kind of high
Imitate convenient and fast method.Meanwhile to guarantee welding quality, when carrying out the welding of such material, it is also desirable to be protected to back of weld
Shield.Common method is back of weld argon filling, added with padding and flux-cored wire self-shield etc. at present, but there is certain limitation
Property: argon-filled protection can get good protecting effect, but the gas flow needed is larger, and batch production cost is very high, to a certain degree
On limit its scope of application；The effect of weld seam back pad method focuses primarily upon the support to molten pool metal, but can not be very
Good avoids weld seam back from aoxidizing；Flux-cored wire is preferable to the protecting effect of molten pool metal, but in one side welding with back formation process
The middle supporting role lacked to molten pool metal, may cause the forming defects such as overlap, burn-through.However, being coated using weld seam back
Protectant technique can effectively make up the disadvantage of above-mentioned conventional method.
Summary of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the object of the present invention is to provide a kind of promotion welding penetrations and prevention back
The TIG soldering method of portion's oxidation, solves that insufficient (incomplete) penetration, lack of penetration, welding efficiency during TIG weld be low and backside oxide, gas
Hole, be mingled with, overlap the problems such as.This method can increase fusion penetration, improve welding efficiency, and obtain forming beauty, any surface finish, there is one
Determine the sealing run of corrosion resistance.Cost can effectively reduce using this method, make up the disadvantage of conventional method to the greatest extent.
To achieve the goals above, the technical solution adopted by the present invention is that:
A kind of TIG soldering method for promoting welding penetration and preventing back oxidation, comprising the following steps:
1) powder and binder are reconciled first by the mass ratio of 1:4~6 and constitutes protective agent, then with acetone with 1.5~3:1
Dilution proportion protective agent, the powder includes following components by mass percentage: SiO2 20%~32%, CaF2 4%~
10%, TiO2 25%~35%, MnO2 5%~12%, Mn 15%~30%, Si 16%~25%；
2) then protective agent is brushed in weld bond front and the back side, front surface coated with a thickness of 0.1mm, backside coating with a thickness of 2mm,
It places 5~10 minutes in air, then welding.
The protective agent can be used as TIG weldering activating agent, and can be used as carrying on the back protective agent.
The protective agent can tow sides use simultaneously, can also individually be used separately.
After the completion of the protective agent coating, it can also be used after placing a period of time.
The beneficial effects of the present invention are:
CaF in the method for the present invention protective agent2And SiO2Mass percent is controlled respectively in 4%~10% and 20%~32%, CaF2
And SiO2It can make arc constriction in welding as activating agent, concentrate current density, conductive area reduces, while current density
Also increase, finally increase fusion penetration.Meanwhile SiO2It is also that slag forms component, the affinity that it has had slag and weld seam, thus
Make slag that there is good covering performance.
TiO in the method for the present invention protective agent2Mass percent is controlled in 25%~35%, TiO2It is being welded as activating agent
When the surface tension temperature gradient of liquid metal in molten bath can be made to be become just by negative, stream in caused Marangani flow direction is formed narrow
And deep molten bath, to increase fusion penetration.TiO simultaneously2It is that slag forms component, the covering performance and the weld seam removability of slag of slag can be improved,
It, which is also acted as, concentrates electric arc, stable effect, to reduce splashing.In addition, TiO2Containing for FeO in back of weld can be reduced
Amount, is combined the surface for being covered on back of weld to make its oxidation, plays the role of chemoproection so as to avoid FeO with α-Fe.
The protective agent of the method for the present invention introduces a certain amount of F and Ca element when to weld seam back-protective, in weld metal zone
React the SiF of generation4, HF volatilize away from weld seam, these gases can exclude the hydrogen of arc region, prevent hydrogen from dissolving
In metal, reduce the chance for generating stomata, meanwhile, the CaO of generation have it is very strong go S, P ability, and play good slag making
Effect improves sealing run Forming Quality.
Mn mass percent in the method for the present invention protective agent, which is controlled, has good deoxidizing capacity in 15%~30%, Mn, can
The iron being oxidized in back of weld is restored, plays the role of chemoproection to back of weld.
The protective agent of the method for the present invention not only can be used as welding activating agent but also can be used as weld seam back protective agent, realize one more
With can increase fusion penetration, improve welding efficiency, and back of weld is effectively prevent to aoxidize, guarantee that back-welding shape is good.Meanwhile effectively
Cost is reduced, makes up the disadvantage of conventional method to the greatest extent.
Detailed description of the invention
Fig. 1 is this protective agent coating method schematic diagram, when as activating agent, in front surface coated thickness 0.1mm or so；As
When back-protective agent, overleaf coating thickness 2mm or so.
Fig. 2 is not using this protectant welding effect figure, and it is partially narrow to can be observed sealing run, reflects that weld penetration is inclined
Shallowly, and oxidation is serious.
Fig. 3 is using the welding effect figure after this protective agent, and it is wider to can be observed sealing run, reflects that weld penetration is inclined
It is deep, and shape beautiful, any surface finish.
Specific embodiment
The present invention is further discussed below with reference to the accompanying drawings and embodiments.But the present invention is not limited to following embodiment.
A kind of TIG soldering method for promoting welding penetration and preventing back oxidation, comprising the following steps:
1) powder and binder are reconciled first by the mass ratio of 1:4~6 and constitutes protective agent, then with acetone with 1.5~3:1
Dilution proportion protective agent, the powder includes following components by mass percentage: SiO2 20%~32%, CaF2 4%~
10%, TiO2 25%~35%, MnO2 5%~12%, Mn 15%~30%, Si 16%~25%；
2) then protective agent is brushed in weld bond front and the back side, front surface coated with a thickness of 0.1mm, backside coating with a thickness of 2mm,
It places 5~10 minutes in air, then welding.
The protective agent can be used as TIG weldering activating agent, and can be used as carrying on the back protective agent.
The protective agent can tow sides use simultaneously, can also individually be used separately.
After the completion of the protective agent coating, it can also be used after placing a period of time.
Protective agent is coated in the way of Fig. 1, carries out following embodiment.
Embodiment 1
Powder is weighed by following mass percent: SiO2 22%, CaF2 5%, TiO2 28%, MnO2 5%, Mn 22%, Si
18%.After mixing by powder, it is reconciled with binder in the ratio of 1:4~6 and constitutes protective agent, then with acetone with 1.5~3:1
Dilution proportion protective agent, front surface coated with a thickness of 0.1mm, place 5~10 minutes in air with a thickness of 2mm by backside coating,
Welding again.
Embodiment 2
Powder is weighed by following mass percent: SiO2 22%, CaF2 5%, TiO2 25%, MnO2 4%, Mn 26%, Si
18%.After mixing by powder, it is reconciled with binder in the ratio of 1:4~6 and constitutes protective agent, then with acetone with 1.5~3:1
Dilution proportion protective agent, front surface coated with a thickness of 0.1mm, place 5~10 minutes in air with a thickness of 2mm by backside coating,
Welding again.
Embodiment 3
Powder is weighed by following mass percent: SiO2 22%, CaF2 5%, TiO2 25%, MnO2 4%, Mn 24%, Si
20%.After mixing by powder, it is reconciled with binder in the ratio of 1:4~6 and constitutes protective agent, then with acetone with 1.5~3:1
Dilution proportion protective agent, front surface coated with a thickness of 0.1mm, place 5~10 minutes in air with a thickness of 2mm by backside coating,
Welding again.
Embodiment 4:
Powder is weighed by following mass percent: SiO2 24%, CaF2 5%, TiO2 25%, MnO2 5%, Mn 25%, Si 16%.
After mixing by powder, it is reconciled with binder in the ratio of 1:4~6 and constitutes protective agent, then with acetone with the ratio of 1.5~3:1
Example dilution protective agent, front surface coated with a thickness of 0.1mm, place 5~10 minutes in air with a thickness of 2mm, then applies by backside coating
Weldering.
Plate after welding according to above-described embodiment, as shown in figure 3, being welded using this method, weld seam is narrow and deep, welding effect
Rate greatly improves.Slag cleaning be easy, sealing run oxidization condition significantly improves, pore-free, be mingled with, overlap the defects of, obtain
Forming quality higher TIG weld connector.Effect is beneficial more than as Figure 2 shows.
Above-described embodiment is the preferred embodiment of the present invention, be in order to illustrate the principle of the present invention and function, rather than limit
Condition processed.It should be appreciated that any be familiar with this person skilled in the art under the premise of without prejudice to the principle of the invention, pass through Logical Deriving
The modifications and variations that reason, simple experiment are made, come under claims of the invention.
Claims (4)
1. a kind of TIG soldering method for promoting welding penetration and preventing back oxidation, which comprises the following steps:
1) powder and binder are reconciled first by the mass ratio of 1:4~6 and constitutes protective agent, then with acetone with 1.5~3:1
Dilution proportion protective agent, the powder includes following components by mass percentage: SiO2 20%~32%, CaF2 4%~
10%, TiO2 25%~35%, MnO2 5%~12%, Mn 15%~30%, Si 16%~25%；
2) then protective agent is brushed in weld bond front and the back side, front surface coated with a thickness of 0.1mm, backside coating with a thickness of 2mm,
It places 5~10 minutes in air, then welding.
2. a kind of TIG soldering method for promoting welding penetration and preventing back oxidation according to claim 1, feature exist
In the protective agent can be used as TIG weldering activating agent, and can be used as carrying on the back protective agent.
3. a kind of TIG soldering method for promoting welding penetration and preventing back oxidation according to claim 1, feature exist
In, the protective agent can tow sides use simultaneously, can also individually be used separately.
4. a kind of TIG soldering method for promoting welding penetration and preventing back oxidation according to claim 1, feature exist
In can also be used after placing a period of time after the completion of the described protective agent coating.
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| CN201910059137.7A CN109604868B (en) | 2019-01-22 | 2019-01-22 | TIG welding method for improving welding penetration and preventing back oxidation |
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| CN201910059137.7A CN109604868B (en) | 2019-01-22 | 2019-01-22 | TIG welding method for improving welding penetration and preventing back oxidation |
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| CN109604868A true CN109604868A (en) | 2019-04-12 |
| CN109604868B CN109604868B (en) | 2021-08-06 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110666398A (en) * | 2019-10-15 | 2020-01-10 | 西安石油大学 | Welding auxiliary active agent and novel nut projection welding method for improving welding penetration |
| CN110961790A (en) * | 2019-12-19 | 2020-04-07 | 江苏众信绿色管业科技有限公司 | Low-loss welding process for stainless steel lined composite pipe |
| CN113613831A (en) * | 2019-04-17 | 2021-11-05 | 安赛乐米塔尔公司 | Method for producing a composite part by Tungsten Inert Gas (TIG) welding |
| CN114393285A (en) * | 2021-12-30 | 2022-04-26 | 河南三建美辰建筑科技有限公司 | Welding method for increasing welding penetration |
| CN114835506A (en) * | 2021-01-30 | 2022-08-02 | 南京理工大学 | Protective agent in titanium alloy liquid molding packaging ceramic |
| CN114932333A (en) * | 2022-06-07 | 2022-08-23 | 广东瑞迅精密机械有限公司 | Welding process of closed pressure-bearing container |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113613831A (en) * | 2019-04-17 | 2021-11-05 | 安赛乐米塔尔公司 | Method for producing a composite part by Tungsten Inert Gas (TIG) welding |
| CN113613831B (en) * | 2019-04-17 | 2024-06-11 | 安赛乐米塔尔公司 | Pre-coated steel substrate, method for producing a pre-coated steel substrate, method for producing an assembly, assembly and use for producing pipe elements and structural components |
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| CN110961790A (en) * | 2019-12-19 | 2020-04-07 | 江苏众信绿色管业科技有限公司 | Low-loss welding process for stainless steel lined composite pipe |
| CN114835506A (en) * | 2021-01-30 | 2022-08-02 | 南京理工大学 | Protective agent in titanium alloy liquid molding packaging ceramic |
| CN114835506B (en) * | 2021-01-30 | 2023-05-30 | 南京理工大学 | Protective agent in titanium alloy liquid molding packaging ceramic |
| CN114393285A (en) * | 2021-12-30 | 2022-04-26 | 河南三建美辰建筑科技有限公司 | Welding method for increasing welding penetration |
| CN114932333A (en) * | 2022-06-07 | 2022-08-23 | 广东瑞迅精密机械有限公司 | Welding process of closed pressure-bearing container |
| CN114932333B (en) * | 2022-06-07 | 2024-02-23 | 广东瑞迅精密机械有限公司 | Welding process of closed pressure-bearing container |
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