CN111716040A - Active welding flux for tungsten inert gas argon arc welding of marine steel, and preparation method and use method thereof - Google Patents
Active welding flux for tungsten inert gas argon arc welding of marine steel, and preparation method and use method thereof Download PDFInfo
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- CN111716040A CN111716040A CN202010628507.7A CN202010628507A CN111716040A CN 111716040 A CN111716040 A CN 111716040A CN 202010628507 A CN202010628507 A CN 202010628507A CN 111716040 A CN111716040 A CN 111716040A
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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
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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
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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
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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
- B23K35/40—Making wire or rods for soldering or welding
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- Inorganic Chemistry (AREA)
- Nonmetallic Welding Materials (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses an active welding flux for tungsten inert gas argon arc welding of marine steel, a preparation method and a use method thereof. The active welding flux for the marine steel tungsten inert gas argon arc welding comprises the following components: comprises 27 to 33 percent of chromic oxide, 20 to 30 percent of zinc oxide, 15 to 25 percent of silicon dioxide, 24 to 28 percent of calcium oxide and titanium oxide and 5 to 10 percent of dimethyl ketone. The active welding flux for the marine steel tungsten inert gas argon arc welding has silicon dioxide and a plurality of oxides, so that the weld penetration and the depth-to-width ratio of a target workpiece can be greatly improved when the low alloy steel is welded, and the welding efficiency is improved. Meanwhile, after the active welding flux for the marine steel tungsten inert gas argon arc welding is adopted for welding, the welding surface of the target workpiece is good in forming, free of slag inclusion, free of pores, high in residual height and reasonable in fusion width. Meanwhile, the invention can improve the hardness of the welding seam, the heat affected zone and the base metal near the welding seam to a certain degree. Tensile tests prove that the tensile strength of the welding seam is higher than that of the base metal.
Description
Technical Field
The invention relates to the technical field of ship welding, in particular to an active welding flux for tungsten inert gas argon arc welding of ship steel, and a preparation method and a use method thereof.
Background
The non-consumable Inert Gas Welding (TIGTtungsten Inert Gas Welding) Welding technology was first proposed by Ukraton research in 1960s and was widely studied domestically in the 90 s. However, the formulation of active flux for low alloy steel, especially for EH36 marine steel used in marine welding field, is almost blank at present.
Disclosure of Invention
The invention mainly aims to provide an active welding flux for tungsten inert gas argon arc welding of marine steel, aiming at improving the weld penetration and the welding efficiency of low alloy steel.
In order to achieve the purpose, the active welding flux for tungsten inert gas argon arc welding of the marine steel comprises the following components: the active welding flux for the marine steel tungsten inert gas argon arc welding comprises, by mass, 27% -33% of chromium sesquioxide, 20% -30% of zinc oxide, 15% -25% of silicon dioxide, 24% -28% of calcium oxide and titanium oxide and 5% -10% of dimethyl ketone.
Further, the components comprise, by mass, 30% of chromium oxide, 25% of zinc oxide, 20% of silicon dioxide, 25% of calcium oxide plus titanium oxide and 5% of dimethyl ketone.
Further, the chromium oxide, the zinc oxide, the silicon dioxide, the titanium oxide and the calcium oxide are in the form of fine particles, and the particle size of the fine particles is less than or equal to 74 micrometers.
Furthermore, the water content of the chromic oxide, the zinc oxide, the silicon dioxide, the titanium oxide and the calcium oxide is less than or equal to 0.1 percent.
The invention also provides a preparation method of the active welding flux for the inert gas argon arc welding of the marine steel tungsten electrode, which comprises the following steps: grinding and crushing chromic oxide, zinc oxide, silicon dioxide, titanium oxide and calcium oxide, and sieving to obtain a solid-phase oxidation mixture;
and drying the solid-phase oxidation mixture, adding dimethyl ketone, and uniformly stirring to be pasty to obtain the active welding flux for the marine steel tungsten inert gas argon arc welding.
Further, the step of adding dimethyl ketone into the dried solid-phase oxidation mixture and uniformly stirring to obtain the active welding flux for the marine steel tungsten inert gas argon arc welding comprises the following steps:
and (3) putting the solid-phase oxidation mixture into a drying room with the relative humidity of 40% to dry for 2-3 h, adding dimethyl ketone, and uniformly stirring to be pasty to obtain the active welding flux for the marine steel tungsten inert gas argon arc welding.
The invention also provides a using method of the active welding flux for the inert gas argon arc welding of the marine steel tungsten electrode, which comprises the following steps: and (3) grinding and polishing the surface of the target workpiece, coating the active welding flux for the marine steel tungsten inert gas argon arc welding on the surface of the target workpiece, standing for 10-20min, and then welding the target workpiece.
Further, the thickness value of the active welding flux coated on the surface of the target workpiece by the marine steel tungsten inert gas argon arc welding is 0.2mm-0.4 mm.
The active welding flux for the marine steel tungsten inert gas argon arc welding has silicon dioxide and a plurality of oxides, so that the weld penetration and the depth-to-width ratio of a target workpiece can be greatly improved when the low alloy steel is welded, and the welding efficiency is improved. Meanwhile, after the active welding flux for the marine steel tungsten inert gas argon arc welding is adopted for welding, the welding surface of the target workpiece is good in forming, free of slag inclusion, free of air holes, reasonable in extra height and melt width, and greatly reduced in adverse effect. Meanwhile, the invention can improve the hardness of the welding seam, the heat affected zone and the base metal near the welding seam to a certain degree. Tensile tests prove that the tensile strength of the welding seam is higher than that of the base metal.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic flow chart showing the steps of an embodiment of the method for preparing the active flux for inert gas argon tungsten-arc welding of marine steel according to the present invention;
FIG. 2 is the formation of the weld surface of EH36 ship steel after welding with the active flux of TIG argon arc welding of the ship steel of the present invention;
FIG. 3 is a comparison of the metallographic structure of EH36 ship steel welded with the activated flux of TIG argon arc welding of the ship steel of the present invention and welded without the activated flux of TIG argon arc welding of the ship steel of the present invention;
FIG. 4 is a table showing the comparison of the parameters after welding for the experimental group of active welding flux without using the steel TIG for ship and the comparative group of active welding flux using the steel TIG for ship.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention relates to an active welding flux for tungsten inert gas argon arc welding of marine steel, which comprises the following components: the active welding flux for the marine steel tungsten inert gas argon arc welding comprises, by mass, 27% -33% of chromium sesquioxide, 20% -30% of zinc oxide, 15% -25% of silicon dioxide, 24% -28% of calcium oxide and titanium oxide and 5% -10% of dimethyl ketone.
The total amount of the calcium oxide and the titanium oxide accounts for 24 to 28 percent of the active flux, wherein the mass ratio of the calcium oxide to the titanium oxide can be arbitrarily mixed according to needs, and is not particularly limited herein.
In one embodiment of the invention, the components comprise, by mass, 30% of chromium oxide, 25% of zinc oxide, 20% of silicon dioxide, 25% of calcium oxide plus titanium oxide and 5% of dimethyl ketone.
In an embodiment of the present invention, the chromium oxide, the zinc oxide, the silicon dioxide, the titanium oxide, and the calcium oxide are fine particles, and a particle size of the fine particles is 74 μm or less.
In an embodiment of the present invention, the water content of the chromium oxide, the zinc oxide, the silicon dioxide, the titanium oxide, and the calcium oxide is less than or equal to 0.1%.
Referring to fig. 1, the invention further provides a method for preparing the active flux for the tungsten inert gas argon arc welding of the marine steel, which comprises the following steps:
s10: grinding and crushing chromic oxide, zinc oxide, silicon dioxide, titanium oxide and calcium oxide, and sieving to obtain a solid-phase oxidation mixture.
S11: manual grinding or mechanical grinding can be adopted in this step, for example: respectively weighing chromic oxide, zinc oxide, silicon dioxide, titanium oxide and calcium oxide according to the mass parts of the raw materials, putting the materials into a mortar, grinding the materials into powder, and screening the ground powder by using a screen with the aperture smaller than 74 micrometers so that the particle size of the ground solid-phase oxide is smaller than 74 micrometers.
S12：And (3) putting the solid-phase oxidation mixture into a drying room with the relative humidity of 40% and drying for 2-3 h.
S20: and drying the solid-phase oxidation mixture, adding dimethyl ketone, and uniformly stirring to obtain the active welding flux for the marine steel tungsten inert gas argon arc welding.
In the step, the dried solid phase oxidation mixture is put into a container, the dimethyl ketone is uniformly added, and the solid phase oxidation mixture and the dimethyl ketone are continuously stirred in the process of adding the dimethyl ketone so as to enable the mixture of the solid phase oxidation mixture and the dimethyl ketone to be pasty, thus obtaining the active welding flux for the marine steel TIG welding.
The preparation method of the active flux for tungsten inert gas argon arc welding of marine steel of the invention is explained in detail by the following specific examples.
Example 1
Placing 30% of chromic oxide, 25% of zinc oxide, 15% of silicon dioxide and 25% of calcium oxide and titanium oxide into a grinding vessel to be ground into powder, and screening the ground powder by using a screen with the aperture smaller than 74 micrometers so that the particle sizes of the ground solid-phase oxides are smaller than 74 micrometers; putting the solid-phase oxidation mixture into a drying room with the relative humidity of 40% and drying for 2 h; and putting the dried solid-phase oxidation mixture into a container, uniformly adding 5% of dimethyl ketone, and continuously stirring the solid-phase oxidation mixture and the dimethyl ketone in the process of adding the dimethyl ketone so as to adjust the mixture of the solid-phase oxidation mixture and the dimethyl ketone into a paste state, thereby obtaining the active welding flux for the marine steel TIG welding.
Example 2
27% of chromium oxide, 27% of zinc oxide, 16% of silicon dioxide and 24% of calcium oxide and titanium oxide are put into a grinding vessel to be ground into powder, and then a screen with the aperture smaller than 74 microns is used for screening the ground powder, so that the particle sizes of the ground solid-phase oxides are all smaller than 74 microns; putting the solid-phase oxidation mixture into a drying room with the relative humidity of 40% and drying for 2.5 h; and putting the dried solid-phase oxidation mixture into a container, uniformly adding 6% dimethyl ketone, and continuously stirring the solid-phase oxidation mixture and the dimethyl ketone in the process of adding the dimethyl ketone so as to adjust the mixture of the solid-phase oxidation mixture and the dimethyl ketone into a paste state, thereby obtaining the active welding flux for the marine steel TIG welding.
Example 3
Putting 33% of chromic oxide, 20% of zinc oxide, 15% of silicon dioxide and 25% of calcium oxide and titanium oxide into a grinding vessel, grinding the materials into powder, and screening the ground powder by using a screen with the aperture smaller than 74 micrometers so that the particle sizes of the ground solid-phase oxides are smaller than 74 micrometers; putting the solid-phase oxidation mixture into a drying room with the relative humidity of 40% and drying for 3 h; and putting the dried solid-phase oxidation mixture into a container, uniformly adding 7% of dimethyl ketone, and continuously stirring the solid-phase oxidation mixture and the dimethyl ketone in the process of adding the dimethyl ketone so as to adjust the mixture of the solid-phase oxidation mixture and the dimethyl ketone into a paste state, thereby obtaining the active welding flux for the marine steel TIG welding.
The invention also provides a using method of the active welding flux for the inert gas argon arc welding of the marine steel tungsten electrode, which comprises the following steps: and (3) grinding and polishing the surface of the target workpiece, coating the active welding flux for the marine steel tungsten inert gas argon arc welding on the surface of the target workpiece, standing for 10-20min, and then welding the target workpiece.
In an embodiment of the invention, the target workpiece is EH36 ship steel, and before welding, the EH36 ship steel pipe is ground and polished to avoid the adverse effect of impurities such as oxide or grease on the surface of the EH36 ship steel on welding. Coating the active flux for the argon tungsten-inert gas arc welding of the marine steel on the surface of EH36 marine steel by using a brush, wherein the thickness value of the active flux is 0.2mm-0.4mm, and standing for 10min-20min to completely volatilize dimethyl ketone in the active flux for the argon tungsten-inert gas arc welding of the marine steel. And then welding the EH36 marine steel by using welding equipment.
Please refer to the drawings for further illustration of the effect of the active flux for tig welding in the present invention, the present application adopts a comparative experiment, i.e. the experimental group adopts a conventional welding technique, and the surface is not coated with any substance. The comparative group coated the marine steel tig argon arc welding active flux of the present application on the target workpiece.
Referring to fig. 2 to 4, in order to further illustrate the use effect of the active flux for tig argon arc welding of marine steel in the present invention, fig. 2 shows that EH36 marine steel is used as the target workpiece material, the welding current is 150A, and the welding speed is 145.5v/mm min-1Argon flow 10L/min-1The distance between the tungsten electrode and the base metal is 3.0mm, the swing amplitude of the welding gun is 2.0mm, the diameter of the tungsten electrode is 2.4mm, and the welding angle is 90 degrees. The EH36 ship steel has good welding surface formation, no slag inclusion, no air holes, reasonable residual height, reasonable melt width and no adverse effect after being welded by using the active welding flux for tungsten inert gas argon arc welding of the ship steel.
In fig. 3, the comparison group is a metallographic structure diagram after welding by using the active flux of the argon tungsten inert gas arc welding for marine steel of the present invention, the comparison group and the experimental group use EH36 marine steel as a target workpiece material, and the welding conditions are as follows: the welding current is 130A, and the welding speed is 146.4 v/mm.min-1The flow rate of argon gas is 10Q/L.min-1The diameter of the tungsten electrode is 2.4mm, the extension distance of the tungsten electrode is 5L/mm, the distance between the tungsten electrode and the base metal is 3L/mm, and the welding angle is 90 degrees. As shown in the figure, the metallographic structure of the active flux for tig welding using the ship steel of the present invention is better, and the following table was obtained by measuring the hardness of the welded zone, the heat affected zone, and the base metal zone after welding:
as can be seen from the metallographic structure comparison graph and the hardness table, the hardness of the EH36 ship steel after being welded by the active welding flux for argon tungsten-arc welding of the ship steel can be greatly improved.
In FIG. 4, the welding speed A is such that the welding current is 130A and 146.4 v/mm.min-1The flow rate of argon gas is 10Q/L.min-1The diameter of the tungsten electrode is 2.4mm, the extension distance of the tungsten electrode is 5L/mm, the distance between the tungsten electrode and the base metal is 3L/mm, and the welding angle is 90 degrees; the welding current of B is 140A, and the welding speed is 146.4 v/mm.min-1The flow rate of argon gas is 10Q/L.min-1The diameter of the tungsten electrode is 2.4mm, the extension distance of the tungsten electrode is 5L/mm, the distance between the tungsten electrode and the base metal is 3L/mm, and the welding angle is 90 degrees; c welding current is 140A, welding speed is 146.4v/mm min-1The flow rate of argon gas is 10Q/L.min-1The diameter of the tungsten electrode is 2.4mm, the extension distance of the tungsten electrode is 5L/mm, the distance between the tungsten electrode and the base metal is 3L/mm, and the welding angle is 90 degrees. From the above, it can be seen that, under the condition that the heat input is increased along with the increase of the welding current, partial martensite appears in the weld joint structure, and the weld joint strength is improved to a certain extent, namely, after the active welding flux for the argon tungsten-arc welding of the marine steel provided by the invention is used for welding, the relation between the strength of the weld joint area and the welding current is in direct proportion.
In summary, the active flux for the inert gas argon tungsten arc welding of the marine steel of the invention contains silicon dioxide and a plurality of oxides, so that the weld penetration and the depth-to-width ratio of a target workpiece can be greatly improved when the low alloy steel is welded, and the welding efficiency is improved. Meanwhile, after the active welding flux for the marine steel tungsten inert gas argon arc welding is adopted for welding, the welding surface of the target workpiece is good in forming, free of slag inclusion, free of air holes, reasonable in extra height and melt width, and greatly reduced in adverse effect. Meanwhile, the invention can improve the hardness of the welding seam, the heat affected zone and the base metal near the welding seam to a certain degree. Tensile tests prove that the tensile strength of the welding seam is higher than that of the base metal.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the present specification and directly/indirectly applied to other related technical fields within the spirit of the present invention are included in the scope of the present invention.
Claims (8)
1. The active welding flux for inert gas argon arc welding of the marine steel tungsten electrode is characterized by comprising the following components in percentage by weight: the active welding flux for the marine steel tungsten inert gas argon arc welding comprises, by mass, 27% -33% of chromium sesquioxide, 20% -30% of zinc oxide, 15% -25% of silicon dioxide, 24% -28% of calcium oxide and titanium oxide and 5% -10% of dimethyl ketone.
2. The active welding flux for inert gas argon tungsten arc welding of marine steel according to claim 1, wherein the components comprise, by mass, 30% of chromium oxide, 25% of zinc oxide, 20% of silicon dioxide, 25% of calcium oxide plus titanium oxide and 5% of dimethyl ketone.
3. The active welding flux for inert gas argon tungsten arc welding of steel for ships according to claim 1, wherein the chromium oxide, the zinc oxide, the silicon dioxide, the titanium oxide and the calcium oxide are in the form of fine particles, and the particle size of the fine particles is less than or equal to 74 microns.
4. The active welding flux for inert gas argon tungsten arc welding of marine steel as claimed in claim 1, wherein the water content of the chromium oxide, the zinc oxide, the silicon dioxide, the titanium oxide and the calcium oxide is less than or equal to 0.1%.
5. A preparation method of active welding flux for inert gas argon arc welding of marine steel tungsten electrode is characterized by comprising the following steps: grinding and crushing chromic oxide, zinc oxide, silicon dioxide, titanium oxide and calcium oxide, and sieving to obtain a solid-phase oxidation mixture;
and drying the solid-phase oxidation mixture, adding dimethyl ketone, and uniformly stirring to be pasty to obtain the active welding flux for the marine steel tungsten inert gas argon arc welding.
6. The method for preparing the active welding flux for the inert gas argon arc welding of the steel tungsten electrode for the ship of claim 5, wherein the step of adding the dimethyl ketone after drying the solid-phase oxidation mixture and uniformly stirring to obtain the active welding flux for the inert gas argon arc welding of the steel tungsten electrode for the ship comprises the following steps:
and (3) putting the solid-phase oxidation mixture into a drying room with the relative humidity of 40% to dry for 2-3 h, adding dimethyl ketone, and uniformly stirring to be pasty to obtain the active welding flux for the marine steel tungsten inert gas argon arc welding.
7. The use method of the active welding flux for the tungsten inert gas argon arc welding of the marine steel is characterized by comprising the following steps of: and (3) grinding and polishing the surface of the target workpiece, coating the active welding flux for the marine steel tungsten inert gas argon arc welding on the surface of the target workpiece, standing for 10-20min, and then welding the target workpiece.
8. The method for using the active welding flux for the argon tungsten-arc welding of the marine steel according to claim 7, wherein the thickness value of the active welding flux for the argon tungsten-arc welding of the marine steel is coated on the surface of the target workpiece and is 0.2mm-0.4 mm.
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| CN202010628507.7A CN111716040B (en) | 2020-07-02 | 2020-07-02 | Active welding flux for tungsten inert gas argon arc welding of marine steel, and preparation method and use method thereof |
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| JP2002205190A (en) * | 2001-01-09 | 2002-07-23 | Kobe Steel Ltd | Flux composition for tig welding |
| CN1359782A (en) * | 2000-12-18 | 2002-07-24 | 中国船舶重工集团公司第七研究院第七二五研究所 | Flux for argon tungsten arc welding of stainless steel |
| CN1439478A (en) * | 2002-03-29 | 2003-09-03 | 甘肃工业大学 | Active agent for low-carbon steel tungsten argon arc welding |
| CN1555957A (en) * | 2004-01-09 | 2004-12-22 | 国营七四一四厂 | Tungsten electrode argon arc welding active flux for increasing welding fusion depth |
| US20150336219A1 (en) * | 2011-01-13 | 2015-11-26 | Siemens Energy, Inc. | Composite materials and methods for laser manufacturing and repair of metals |
| CN108032002A (en) * | 2017-11-27 | 2018-05-15 | 重庆大学 | A kind of mixed active agent for magnesium alloy activating-tungsten inert gas welding |
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2020
- 2020-07-02 CN CN202010628507.7A patent/CN111716040B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1359782A (en) * | 2000-12-18 | 2002-07-24 | 中国船舶重工集团公司第七研究院第七二五研究所 | Flux for argon tungsten arc welding of stainless steel |
| JP2002205190A (en) * | 2001-01-09 | 2002-07-23 | Kobe Steel Ltd | Flux composition for tig welding |
| CN1439478A (en) * | 2002-03-29 | 2003-09-03 | 甘肃工业大学 | Active agent for low-carbon steel tungsten argon arc welding |
| CN1555957A (en) * | 2004-01-09 | 2004-12-22 | 国营七四一四厂 | Tungsten electrode argon arc welding active flux for increasing welding fusion depth |
| US20150336219A1 (en) * | 2011-01-13 | 2015-11-26 | Siemens Energy, Inc. | Composite materials and methods for laser manufacturing and repair of metals |
| CN108032002A (en) * | 2017-11-27 | 2018-05-15 | 重庆大学 | A kind of mixed active agent for magnesium alloy activating-tungsten inert gas welding |
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