CN112719687A - Flux-cored wire for underwater welding - Google Patents
Flux-cored wire for underwater welding Download PDFInfo
- Publication number
- CN112719687A CN112719687A CN202011491022.4A CN202011491022A CN112719687A CN 112719687 A CN112719687 A CN 112719687A CN 202011491022 A CN202011491022 A CN 202011491022A CN 112719687 A CN112719687 A CN 112719687A
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- flux
- welding
- underwater
- metal powder
- cored
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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
- B23K35/24—Selection of soldering or welding materials proper
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The invention discloses a flux-cored wire for underwater welding, which consists of a flux core and a sheath coating the flux core, wherein the flux core consists of the following components in parts by weight: 40-60 parts of rutile; 40-60 parts of fluorite; 10-20 parts of fluoride; 5-15 parts of graphite; 50-80 parts of metal powder; 20-30 parts of carbonate. The flux-cored wire prepared by the invention can be applied to a deepwater environment. The method is particularly suitable for underwater wet welding of underwater carbon steel and low alloy steel, ensures that the welding process is not influenced by external water environment through the construction of gas-making and slag-making atmosphere, and has stable welding quality and good weld formation.
Description
Technical Field
The invention relates to an underwater welding technology, in particular to a flux-cored wire for underwater welding.
Background
The underwater welding process is more complicated due to the existence of water, and various problems which are not met by land welding can occur, the underwater welding methods which are applied and researched by countries in the world are various at present, the methods can be roughly divided into dry welding and wet welding, the wet welding is underwater direct welding, the underwater wet welding which is mature at present is based on an arc welding technology, and the underwater wet welding has the advantages of simple equipment, low cost, flexible operation, strong applicability and the like.
There is therefore a need for further improvements in the prior art.
Disclosure of Invention
In order to solve the above problems, a flux-cored wire for underwater welding is proposed, which provides the following technical scheme:
the flux-cored wire for underwater welding comprises a flux core and a sheath coating the flux core, wherein the flux core comprises the following components in parts by weight:
the flux-cored wire for underwater welding is characterized in that the fluoride is composed of potassium fluotitanate and lithium fluoride according to the proportion of 1: 1.
The flux-cored wire for underwater welding is characterized in that the metal powder consists of main metal powder and trace metal powder according to a ratio of 6:1, wherein the main metal powder consists of iron, manganese and aluminum according to a ratio of 3:2:1, and the trace metal powder consists of nickel, magnesium and copper according to a ratio of 1:1: 1.
The flux-cored wire for underwater welding is characterized in that the granularity of the main metal powder is 60 meshes, and the granularity of the trace metal powder is 200 meshes.
The flux-cored wire for underwater welding is characterized in that the carbonate is composed of barium carbonate and magnesium carbonate according to the proportion of 1: 1.
The flux-cored wire for underwater welding is characterized in that the flux-cored filling rate is 35%.
The flux-cored wire for underwater welding is characterized in that the sheath consists of an inner metal belt and an outer metal belt, and flux cores are filled between the inner metal belt and the inner metal belt.
The flux-cored wire for underwater welding is characterized in that the ratio of the amount of a filled flux core in the inner metal belt to the amount of the filled flux core between the inner metal belt and the outer metal belt is 3: 2.
The flux-cored wire for underwater welding is characterized in that an outer metal belt is a steel belt, and an inner metal belt is a nickel belt.
Advantageous effects
The flux-cored wire prepared by the invention can be applied to a deepwater environment. The method is particularly suitable for underwater wet welding of carbon steel and alloy steel, ensures that the welding process is not influenced by external water environment through the construction of gas-making and slag-making atmosphere, and has stable welding quality and good weld formation.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following description is given for clear and complete description of the technical solution of the present invention with reference to the embodiments of the present invention, and other similar embodiments obtained by those skilled in the art without creative efforts based on the embodiments of the present application shall fall within the protection scope of the present application.
The invention provides a flux-cored wire for underwater welding, which consists of a flux core and a sheath coating the flux core, wherein the flux core consists of the following components in parts by weight:
preferably, the fluoride comprises potassium fluotitanate and lithium fluoride according to the proportion of 1: 1. The addition of potassium fluotitanate and lithium fluoride can effectively promote the welding quality of weld seam welding, and the proportion of potassium fluotitanate and lithium fluoride is equal proportion through adjusting, can exert the synergistic effect of potassium fluotitanate and lithium fluoride, effectively promotes electric arc stability among the welding process and reduces the welding seam crackle incidence simultaneously, promotes the welding seam quality.
The metal powder can react with oxygen, can effectively prevent the generation of pores, and plays a role in improving electric arcs. Excessive Al is added to increase the content of residual Al in the welding line and reduce the toughness of the welding line, and too little Al can not effectively prevent the generation of pores, wherein the main metal powder has strong deoxidation effect and is an effective element for low oxidation of the welding metal. The function of reducing weld cracks can be achieved. Trace metal powder can enhance the toughness of the weld metal. The metal powder comprises main metal powder and trace metal powder according to a ratio of 6:1, further the main metal powder comprises iron, manganese and aluminum according to a ratio of 3:2:1, and the trace metal powder comprises nickel, magnesium and copper according to a ratio of 1:1: 1. Preferably, the primary metal powder has a particle size of 60 mesh and the trace metal powder has a particle size of 200 mesh.
The carbonate is decomposed into oxide and carbon dioxide, and the carbon dioxide gas has a protective effect on the welding process, wherein the carbonate is composed of barium carbonate and magnesium carbonate according to the proportion of 1: 1. The barium carbonate and the magnesium carbonate in the proportion play a role in gas making, slag making and arc stabilizing, can improve the physical property of the slag, ensure the uniform flow distribution of the slag in the welding seam forming process, reduce cracks and improve the welding quality of the welding seam.
In a preferred embodiment, the core fill is 35%.
Preferably, the outer skin is composed of an inner metal belt and an outer metal belt, and the inner metal belt and the outer metal belt are filled with the medicine core. The distribution form of the two layers of flux cores formed by the two layers of metal bands is compared with that of a single-layer flux core, the waterproof performance of the welding wire is improved, the density and the wrapping performance of formed bubbles are better than those of the single-layer flux core, the probability of generating defects of welding seams can be effectively reduced by the inner-layer metal bands and the outer-layer metal bands, and the tensile strength of a welding joint is improved.
Preferably, the ratio of the amount of the filled flux core in the inner metal belt to the amount of the filled flux core between the inner metal belt and the outer metal belt is 3: 2. Wherein, the outer layer metal belt is a steel belt, and the inner layer metal belt is a nickel belt. The flux core ensures the reasonable proportion of the inner and outer metal bands and the flux core, so that the welding wire can obtain excellent mechanical property, the electric arc combustion is stable during underwater welding, the welding seam quality is high, and the tensile strength of the joint is high.
The flux core is divided into two parts by two layers of metal belts, so that the large aggregation of the flux core can be avoided, the tight combination degree of the flux core is enhanced, the conductivity is enhanced, the stability of electric arc is improved, the moisture resistance of the welding wire can be effectively improved by the two layers of metal belts, the dryness degree of the flux core is ensured to be suitable for being used in a deep water environment, the metallurgical reaction of weld metal can be fully performed after the nickel belt is melted, and the quality of a welding joint is high; the outermost layer of steel belt isolates the contact of the flux core with moisture and oxygen in the air, thereby avoiding the failure of the flux core.
The flux-cored wire provided by the embodiment of the invention has excellent welding process performance, the quality of a welding seam is improved by controlling the content of diffusible hydrogen in the metal of the welding seam, the welding strength and toughness are improved, and the flux-cored wire is extremely suitable for underwater welding in a deep water environment.
The technical solution of the present invention is further illustrated by the following examples.
Example 1
1. The flux-cored wire for underwater welding comprises the following components in parts by weight:
the metal powder consists of main metal powder and trace metal powder according to a ratio of 6:1, wherein the main metal powder consists of iron, manganese and aluminum according to a ratio of 3:2:1, and the trace metal powder consists of nickel, magnesium and copper according to a ratio of 1:1: 1.
Wherein the granularity of the main metal powder is 60 meshes, and the granularity of the trace metal powder is 200 meshes.
2. The outer layer of the flux-cored wire for underwater welding is made of an outer metal belt which is a steel belt, an inner metal belt which is a nickel belt and is composed of an inner metal belt and an outer metal belt, and flux cores are filled between the inner metal belt and the inner metal belt. Wherein, the ratio of the amount of the filled flux core in the inner metal belt to the amount of the filled flux core between the inner metal belt and the outer metal belt is 3:2, the filling rate of the flux core is 35 percent, and the diameter of the welding wire is 1.5 mm.
The adopted welding process parameters are welding current of 160-180A and welding voltage of 20V.
Example 2
1. The flux-cored wire for underwater welding comprises the following components in parts by weight:
the metal powder consists of main metal powder and trace metal powder according to a ratio of 6:1, wherein the main metal powder consists of iron, manganese and aluminum according to a ratio of 3:2:1, and the trace metal powder consists of nickel, magnesium and copper according to a ratio of 1:1: 1.
Wherein the granularity of the main metal powder is 60 meshes, and the granularity of the trace metal powder is 200 meshes.
2. The outer layer of the flux-cored wire for underwater welding is made of an outer metal belt which is a steel belt, an inner metal belt which is a nickel belt and is composed of an inner metal belt and an outer metal belt, and flux cores are filled between the inner metal belt and the inner metal belt. Wherein, the ratio of the amount of the filled flux core in the inner metal belt to the amount of the filled flux core between the inner metal belt and the outer metal belt is 3:2, the filling rate of the flux core is 35 percent, and the diameter of the welding wire is 1.5 mm.
The adopted welding process parameters are welding current of 160-180A and welding voltage of 20V.
Example 3
1. The flux-cored wire for underwater welding comprises the following components in parts by weight:
the metal powder consists of main metal powder and trace metal powder according to a ratio of 6:1, wherein the main metal powder consists of iron, manganese and aluminum according to a ratio of 3:2:1, and the trace metal powder consists of nickel, magnesium and copper according to a ratio of 1:1: 1.
Wherein the granularity of the main metal powder is 60 meshes, and the granularity of the trace metal powder is 200 meshes.
2. The outer layer of the flux-cored wire for underwater welding is made of an outer metal belt which is a steel belt, an inner metal belt which is a nickel belt and is composed of an inner metal belt and an outer metal belt, and flux cores are filled between the inner metal belt and the inner metal belt. Wherein, the ratio of the amount of the filled flux core in the inner metal belt to the amount of the filled flux core between the inner metal belt and the outer metal belt is 3:2, the filling rate of the flux core is 35 percent, and the diameter of the welding wire is 1.5 mm.
The adopted welding process parameters are welding current of 160-180A and welding voltage of 20V.
The flux-cored wires prepared in examples 1 to 3 were subjected to a welding test using a stainless steel plate as a base material, a plate thickness of 14mm, a welding simulated water depth of 100 m, and mechanical properties of the welded and deposited metal as shown in table 1.
Table 1: examples 1 to 3 are test results of the welding test
The flux-cored wire provided by the embodiment of the invention has excellent welding process performance, and the weld metal of the welding joint has high strength, toughness and comprehensive performance. Is particularly suitable for welding in a deepwater environment. The problems of low weld strength and poor toughness in the existing underwater welding process are solved.
The present invention has been described in detail, and it should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Claims (9)
1. The flux-cored wire for underwater welding is characterized by comprising a flux core and a sheath for coating the flux core, wherein the flux core comprises the following components in parts by weight:
2. the flux cored welding wire for underwater welding as claimed in claim 1, wherein the fluoride is composed of potassium fluotitanate and lithium fluoride in a ratio of 1: 1.
3. The flux-cored wire for underwater welding of claim 1, wherein the metal powder consists of main metal powder and trace metal powder in a ratio of 6:1, wherein the main metal powder consists of iron, manganese and aluminum in a ratio of 3:2:1, and the trace metal powder consists of nickel, magnesium and copper in a ratio of 1:1: 1.
4. The flux cored welding wire for underwater welding of claim 3, wherein the primary metal powder particle size is 60 mesh and the trace metal powder particle size is 200 mesh.
5. The flux-cored wire for underwater welding of claim 1, wherein the carbonate consists of barium carbonate and magnesium carbonate in a 1:1 ratio.
6. The flux cored welding wire for underwater welding of claim 1, wherein the flux core fill rate is 35%.
7. The flux-cored welding wire for underwater welding of claim 1, wherein the sheath is composed of an inner metal strip and an outer metal strip, and a flux core is filled between the inner metal strip and the outer metal strip.
8. The flux cored welding wire for underwater welding as claimed in claim 6, wherein a ratio of an amount of the flux cored in the inner metal strip to an amount of the flux cored between the inner and outer metal strips is 3: 2.
9. The flux cored welding wire for underwater welding of claim 6, wherein the outer metal strip is a steel strip and the inner metal strip is a nickel strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011491022.4A CN112719687B (en) | 2020-12-17 | 2020-12-17 | Flux-cored wire for underwater welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011491022.4A CN112719687B (en) | 2020-12-17 | 2020-12-17 | Flux-cored wire for underwater welding |
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| Publication Number | Publication Date |
|---|---|
| CN112719687A true CN112719687A (en) | 2021-04-30 |
| CN112719687B CN112719687B (en) | 2022-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011491022.4A Active CN112719687B (en) | 2020-12-17 | 2020-12-17 | Flux-cored wire for underwater welding |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102069322A (en) * | 2010-12-24 | 2011-05-25 | 中国船舶重工集团公司第七二五研究所 | High-strength carbon dioxide protecting surfacing flux-cored wire |
| CN103084761A (en) * | 2013-02-27 | 2013-05-08 | 哈尔滨工业大学（威海） | Self-protection core welding stick used for underwater wet welding |
| CN106736014A (en) * | 2016-11-28 | 2017-05-31 | 安徽飞弧焊业股份有限公司 | A kind of excellent wear-resisting alkaline flux-cored wire of the excellent welding performance of welding performance and preparation method |
| CN106964918A (en) * | 2017-04-17 | 2017-07-21 | 山东省科学院海洋仪器仪表研究所 | A kind of all positon underwater wet welding self-protection flux-cored wire of deepwater environment |
| CN108296667A (en) * | 2018-02-12 | 2018-07-20 | 青岛润乾高新科技有限公司 | A kind of flux-cored wire and preparation method for Underwater Welding |
| CA2997450A1 (en) * | 2017-03-21 | 2018-09-21 | Nippon Steel & Sumikin Welding Co., Ltd. | Flux-cored wire for gas-shielded arc welding |
| CN111571066A (en) * | 2020-04-17 | 2020-08-25 | 江苏大学 | Low-hydrogen stainless steel self-protection flux-cored wire suitable for underwater environment |
| CN211661367U (en) * | 2020-02-28 | 2020-10-13 | 天津市捷东焊材有限公司 | Aluminum welding wire with brazing flux |
-
2020
- 2020-12-17 CN CN202011491022.4A patent/CN112719687B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102069322A (en) * | 2010-12-24 | 2011-05-25 | 中国船舶重工集团公司第七二五研究所 | High-strength carbon dioxide protecting surfacing flux-cored wire |
| CN103084761A (en) * | 2013-02-27 | 2013-05-08 | 哈尔滨工业大学（威海） | Self-protection core welding stick used for underwater wet welding |
| CN106736014A (en) * | 2016-11-28 | 2017-05-31 | 安徽飞弧焊业股份有限公司 | A kind of excellent wear-resisting alkaline flux-cored wire of the excellent welding performance of welding performance and preparation method |
| CA2997450A1 (en) * | 2017-03-21 | 2018-09-21 | Nippon Steel & Sumikin Welding Co., Ltd. | Flux-cored wire for gas-shielded arc welding |
| CN106964918A (en) * | 2017-04-17 | 2017-07-21 | 山东省科学院海洋仪器仪表研究所 | A kind of all positon underwater wet welding self-protection flux-cored wire of deepwater environment |
| CN108296667A (en) * | 2018-02-12 | 2018-07-20 | 青岛润乾高新科技有限公司 | A kind of flux-cored wire and preparation method for Underwater Welding |
| CN211661367U (en) * | 2020-02-28 | 2020-10-13 | 天津市捷东焊材有限公司 | Aluminum welding wire with brazing flux |
| CN111571066A (en) * | 2020-04-17 | 2020-08-25 | 江苏大学 | Low-hydrogen stainless steel self-protection flux-cored wire suitable for underwater environment |
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| Publication number | Publication date |
|---|---|
| CN112719687B (en) | 2022-06-14 |
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