CN110480210A - A kind of back of weld exempts from gas shield welding protecting agent and preparation method thereof - Google Patents
A kind of back of weld exempts from gas shield welding protecting agent and preparation method thereof Download PDFInfo
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- CN110480210A CN110480210A CN201910774205.8A CN201910774205A CN110480210A CN 110480210 A CN110480210 A CN 110480210A CN 201910774205 A CN201910774205 A CN 201910774205A CN 110480210 A CN110480210 A CN 110480210A
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- major ingredient
- powder
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- protecting agent
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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
- B23K35/362—Selection of compositions of fluxes
-
- 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
- B23K35/40—Making wire or rods for soldering or welding
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The present invention discloses a kind of back of weld and exempts from gas shield welding protecting agent and preparation method thereof; including major ingredient and binder; the major ingredient includes following weight percent composition: calcium silicate powder 30-40%; silicon dioxide powder 22-29%, Paris white 10-15%, calcium fluoride powder 14-17%, titanium dioxide powder 5-8%; aluminium oxide powder 2-5%, manganese dioxide powder 2-4%；The dosage of the binder is the 14-16% of major ingredient total weight；And by ingredient-it is dry-mixed-wet mixing-granulation-drying-sintering-is broken, screening obtains.Welding protecting agent prepared by the present invention can reduce the welding defects such as back of weld oxidation, stomata, crackle, slag inclusion in stainless steel protection welding, improve welding joint mechanical property; it is easy to use; the use of a large amount of protective gas is saved simultaneously, saves cost, improves production efficiency.
Description
Technical field
The invention belongs to weld chemical technology field, and in particular to a kind of back of weld exempts from gas shield welding protecting agent
And preparation method.
Background technique
Stainless steel is answered extensively with comprehensive mechanical properties such as its good corrosion resistance, intensity, toughness, plasticity, weldabilities
For industrial circles such as bearing device, nuclear power station, automobile, petrochemical industry, biomedicine, buildings.For the weldability of stainless steel,
There are many method for being suitble to it to weld, including manual electric arc welding (SMAW), Lincoln weld (SAW), gas shielded arc welding (tungsten
Pole inert gas-shielded arc welding TIG, welding MIG, CO2 gas shielded flux cored wire weld FCAW), laser
Weldering, laser-arc hybrid welding process etc..Wherein, at present using it is more be that gas shielded arc welding is (gas tungsten arc welding TIG, molten
Change pole inert gas-shielded arc welding MIG, CO2 gas shielded flux cored wire and weld FCAW).
Stainless steel in the welding process because welding when weld seam front have welding gun spray protective gas protection weldering
It is preferable to stitch quality, but for back of weld, due to the barrier of handbag stainless steel itself, protective gas cannot protect it,
The oxidation by air is easy under the hot environment of welding and generates the welding defects such as stomata, oxide slag inclusion, so as to cause weldering
Connect joint quality decline.
In the higher weld seam technique of some construction requirements, it is often necessary to be passed through protection gas in the front and back of weld seam
Body (argon gas) is protected, but this welding process is very time-consuming, efficiency is very low, quality is affected by human factors water
It is flat to be not easy the disadvantages of guaranteeing, and production, the manufacture efficiency of serious limit product.
Summary of the invention
In view of the deficiencies of the prior art, exempt from gas shield welding the purpose of the present invention is to provide a kind of back of weld to protect
Agent and preparation method are protected, when solving stainless steel welded in the prior art, the oxidation by air is easy under hot environment and produces
The welding defects such as angry hole, oxide slag inclusion.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of back of weld exempts from gas shield welding protecting agent, including major ingredient and binder, and the major ingredient includes following
Weight percent composition: calcium silicate powder 30-40%, silicon dioxide powder 22-29%, Paris white 10-15%, calcium fluoride powder 14-
17%, titanium dioxide powder 5-8%, aluminium oxide powder 2-5%, manganese dioxide powder 2-4%；
The dosage of the binder is the 14-16% of major ingredient total weight, and the parameter index of the binder is as follows: Na2O
>=8.2%, SiO2 >=27.0%, S≤0.008%, P≤0.008%, modulus: 2.9, Baume degrees: 40-42 °.
Further, the major ingredient includes that following weight percent forms: calcium silicate powder 34%, silicon dioxide powder 22%,
Paris white 15%, calcium fluoride powder 17%, titanium dioxide powder 6%, aluminium oxide powder 3%, manganese dioxide powder 3%；
The dosage of the binder is the 16% of major ingredient total weight.
Further, the protective agent is floury structure, and the particle of each component raw material is not more than 200 mesh in major ingredient.
A kind of back of weld exempts from the preparation method of gas shield welding protecting agent, comprising the following steps:
1) ingredient: ingredient is distinguished according to the mixing ratio of major ingredient；
2) dry-mixed: the material of major ingredient each component is mixed；
3) wet mixing: weighing adhesive according to the 14-16% of major ingredient total weight percent, and is mixed into each component material of major ingredient
Middle stirring, the condition of stirring stir 20-30min under the conditions of being 40-60 DEG C；
4) it is granulated: the mixed material after wet mixing being placed in pelletizer and is granulated；
5) it dries: the material after granulation is dried under 150 DEG C~200 DEG C of low temperature environment；
6) it is sintered: the material after drying is placed in high temperature sintering under 500 DEG C~600 DEG C of temperature environment, obtain molding
Protective agent；
7) it is crushed, sieves: crushing and screening processing being carried out using Raymond mill, obtains protective agent powder product.
Further, the drying time of the step 5) is no less than 30min；The sintering time of step 6) is no less than 30min.
Further, 100 mesh are sieving through in the step 7).
A kind of back of weld exempts from the application method of gas shield welding protecting agent, and the protective agent is according to 5:1 parts by weight
Proportion is mixed with dehydrated alcohol, and is tuned into starchiness, is then coated on stainless-steel sheet back of weld groove two sides with hairbrush.
Further, after the completion of coating and 5- is stood when the protective agent coats with a thickness of 1cm, width 1cm
10min carries out air-dried.
Dehydrogenation can be played the role of by decomposing under calcirm-fluoride hot environment in protectant raw material, reduce the diffusion in weld seam
Hydrogen content, to reduce weld cracking tendency.
The calcium carbonate of use is to generate the oxide and titanium dioxide of calcium because decomposing under high temperature environment in welding process
Carbon can float to face of weld but not be enriched in weld metal, to guarantee the metal purity of welded seam area.
The effect of silica is the fusing point for adjusting protection solder flux, in addition makes that solder flux is protected to be formed to melt in the welding process
Slag quick solidification forming, while silica can undergo phase transition process during high temperature is to low temperature, and in the same of phase transformation
When also with volume change, be conducive to skull removing, purify weld seam position.
Aluminum oxide, which is added, can make the fish scale ripple on back of weld welding bead surface tiny, while aluminum oxide and fluorine
Desulfurization can be played the role of by changing calcium combination.
Beneficial effects of the present invention:
1, welding protecting agent prepared by the present invention can reduce back of weld oxidation, stomata, split in stainless steel protection welding
The welding defects such as line, slag inclusion improve welding joint mechanical property, easy to use, while saving the use of a large amount of protective gas, save
Production efficiency is improved in cost-saving.
2, calcium silicates, calcium carbonate, calcirm-fluoride are added in protective agent provided by the invention, is thermally decomposed in the welding process,
Air bag is formed at the stainless steel welded back side covered, ambient air is discharged, back of weld is made to be not easily susceptible to air oxidation pollution,
Guarantee the stability of soldering tip when welding.
3, preparation method provided by the invention can reduce the loss in stock preparation process, so that the utilization rate of raw material obtains
To improve, and it is easy to operate, reduce the cost in preparation process.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical scheme in the embodiment of the invention is clearly and completely described,
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, all other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the scope of protection of the invention.
Embodiment 1:
The present embodiment provides a kind of backs of weld to exempt from gas shield welding protecting agent, including major ingredient and binder, major ingredient
Including following weight percent form: calcium silicate powder 34%, silicon dioxide powder 22%, Paris white 15%, calcium fluoride powder 17%,
Titanium dioxide powder 6%, aluminium oxide powder 3%, manganese dioxide powder 3%；
The dosage of binder is the 16% of major ingredient total weight.
Use the preparation method comprises the following steps:
1) ingredient: ingredient is distinguished according to the mixing ratio of major ingredient；
2) dry-mixed: the material of major ingredient each component is mixed；
3) wet mixing: weighing adhesive according to the 14-16% of major ingredient total weight percent, and is mixed into each component material of major ingredient
In be stirred, the condition of stirring are as follows: stir 20-30min under 40-60 DEG C of temperature environment, mix well each component；
4) it is granulated: the mixture after wet mixing being placed in pelletizer and is granulated；
5) it dries: the material after granulation being dried under 150 DEG C~200 DEG C of low temperature environment, drying time is no less than
30min；
6) it is sintered: the material after drying being placed in high temperature sintering under 500 DEG C~600 DEG C of temperature environment, sintering time is not
Less than 30min, molding protective agent is obtained；
7) it is crushed, sieves: crushing and screening processing is carried out using Raymond mill, be sieving through 100 mesh and obtain protective agent powder product.
Embodiment 2:
The present embodiment provides a kind of backs of weld to exempt from gas shield welding protecting agent, including major ingredient and binder, major ingredient
It is formed including following weight percent: by calcium silicate powder 40%, silicon dioxide powder 24%, Paris white 10%, calcium fluoride powder
14%, titanium dioxide powder 5%, aluminium oxide powder 5%, manganese dioxide powder 2%；The particle of each component raw material is not more than in major ingredient
200 mesh；
The dosage of binder is the 14% of major ingredient total weight.
The preparation method of use is same as Example 1.
Embodiment 3:
The present embodiment provides a kind of backs of weld to exempt from gas shield welding protecting agent, including major ingredient and binder, major ingredient
It is formed including following weight percent: by calcium silicate powder 30%, silicon dioxide powder 29%, Paris white 12%, calcium fluoride powder
15%, titanium dioxide powder 8%, aluminium oxide powder 2%, manganese dioxide powder 4%；The particle of each component raw material is not more than in major ingredient
200 mesh；
The dosage of binder is the 15% of major ingredient total weight.
The preparation method of use is same as Example 1.
After preparation molding, and following application method is used, molding protective agent powder product will be prepared according to 5:1 weight
Amount part proportion is mixed with dehydrated alcohol, and is tuned into starchiness；Then stainless-steel sheet back of weld groove two is coated on hairbrush
Side, coating starchiness is protectant with a thickness of 1cm, width 1cm, and stands 5-10min；Dehydrated alcohol can realize protective agent powder
Last Quick-air-drying improves welding efficiency, if being replaced with water, protective agent powder can be made to be easy to produce bubble when air-drying.Then
Welded using manual metal-arc welding mode, welding and voltage is adjusted to 35V, the electric current of welding is the pressure welding mode of 120A to two pieces
Thickness is that 304 stainless steels of 5mm are welded.
Compared to more traditional weld seam technique, the oxidation area of back of weld is obviously reduced in the present embodiment 1-3, is abandoned to two
Beautiful appearance between block stainless steel, object stomata and impurity bond in gap.
Table 1 is the chemical component parameter of raw material in protectant major ingredient.
Table 1
The wherein modulus of pure sodium silicate: 2.9, Baume degrees: 40-42 °.
Exempt to pass through in gas shield welding protecting agent and preparation method thereof in conclusion the present invention provides back of weld
The mutual cooperation of each component, which is realized, in raw material carries out effective protection to stainless steel weld joint, can reduce back of weld oxidation, stomata, split
The welding defects such as line, slag inclusion improve welding joint mechanical property, easy to use, can save the use of a large amount of protective gas, save
Cost improves production efficiency.
In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means
Particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one implementation of the invention
In example or example.In the present specification, schematic expression of the above terms may not refer to the same embodiment or example.
Moreover, particular features, structures, materials, or characteristics described can be in any one or more of the embodiments or examples to close
Suitable mode combines.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.
Claims (8)
1. a kind of back of weld exempts from gas shield welding protecting agent, which is characterized in that including major ingredient and binder, the major ingredient
It is formed including following weight percent: calcium silicate powder 30-40%, silicon dioxide powder 22-29%, Paris white 10-15%, fluorination
Calcium powder 14-17%, titanium dioxide powder 5-8%, aluminium oxide powder 2-5%, manganese dioxide powder 2-4%；
The dosage of the binder is the 14-16% of major ingredient total weight, and the parameter index of the binder is as follows: Na2O >=
8.2%, SiO2 >=27.0%, S≤0.008%, P≤0.008%, modulus: 2.9, Baume degrees: 40-42 °.
2. back of weld according to claim 1 exempts from gas shield welding protecting agent, which is characterized in that the major ingredient packet
Include following weight percent composition: calcium silicate powder 34%, silicon dioxide powder 22%, Paris white 15%, calcium fluoride powder 17%, two
Titanium oxide powder 6%, aluminium oxide powder 3%, manganese dioxide powder 3%；
The dosage of the binder is the 16% of major ingredient total weight.
3. back of weld according to claim 1 exempts from gas shield welding protecting agent, which is characterized in that the protective agent
For floury structure, and the particle of each component raw material is not more than 200 mesh in major ingredient.
4. the preparation method that back of weld according to claim 1 exempts from gas shield welding protecting agent, which is characterized in that
The following steps are included:
1) ingredient: ingredient is distinguished according to the mixing ratio of major ingredient；
2) dry-mixed: the material of major ingredient each component is mixed；
3) wet mixing: weighing adhesive according to the 14-16% of major ingredient total weight percent, and is mixed into each component material of major ingredient and stirs
It mixes, the condition of stirring stirs 20-30min under the conditions of being 40-60 DEG C；
4) it is granulated: the mixed material after wet mixing being placed in pelletizer and is granulated；
5) it dries: the material after granulation is dried under 150 DEG C~200 DEG C of low temperature environment；
6) it is sintered: the material after drying being placed in high temperature sintering under 500 DEG C~600 DEG C of temperature environment, obtains molding protection
Agent；
7) it is crushed, sieves: crushing and screening processing being carried out using Raymond mill, obtains protective agent powder product.
5. the preparation method that back of weld according to claim 4 exempts from gas shield welding protecting agent, which is characterized in that
The drying time of the step 5) is no less than 30min；The sintering time of step 6) is no less than 30min.
6. the preparation method that back of weld according to claim 4 exempts from gas shield welding protecting agent, which is characterized in that
100 mesh are sieving through in the step 7).
7. the application method that a kind of back of weld exempts from gas shield welding protecting agent, which is characterized in that the protective agent according to
5:1 weight is mixed with dehydrated alcohol, and is tuned into starchiness, is then coated on stainless-steel sheet back of weld slope with hairbrush
Mouth two sides.
8. the application method that back of weld according to claim 7 exempts from gas shield welding protecting agent, which is characterized in that
The protective agent coat when with a thickness of 1cm, width 1cm, after the completion of coating and stand 5-10min carry out it is air-dried.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910774205.8A CN110480210A (en) | 2019-08-21 | 2019-08-21 | A kind of back of weld exempts from gas shield welding protecting agent and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910774205.8A CN110480210A (en) | 2019-08-21 | 2019-08-21 | A kind of back of weld exempts from gas shield welding protecting agent and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113070609A (en) * | 2021-04-13 | 2021-07-06 | 池建潘 | High-carbon steel welding auxiliary for laser welding and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101168222A (en) * | 2007-11-27 | 2008-04-30 | 西安理工大学 | Stainless steel welding protecting agent |
| CN108723638A (en) * | 2018-04-26 | 2018-11-02 | 洛阳双瑞特种合金材料有限公司 | It is a kind of for the sintered flux and preparation method of the stainless steel welding stick of titanium containing niobium and application |
| CN109483088A (en) * | 2017-09-12 | 2019-03-19 | 天津大学 | Weld back-protective agent and preparation method thereof and the application in deeply molten TIG weld |
-
2019
- 2019-08-21 CN CN201910774205.8A patent/CN110480210A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101168222A (en) * | 2007-11-27 | 2008-04-30 | 西安理工大学 | Stainless steel welding protecting agent |
| CN109483088A (en) * | 2017-09-12 | 2019-03-19 | 天津大学 | Weld back-protective agent and preparation method thereof and the application in deeply molten TIG weld |
| CN108723638A (en) * | 2018-04-26 | 2018-11-02 | 洛阳双瑞特种合金材料有限公司 | It is a kind of for the sintered flux and preparation method of the stainless steel welding stick of titanium containing niobium and application |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113070609A (en) * | 2021-04-13 | 2021-07-06 | 池建潘 | High-carbon steel welding auxiliary for laser welding and preparation method thereof |
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