CN112621018B - Welding rod for high-nitrogen austenitic stainless steel and manufacturing process thereof - Google Patents
Welding rod for high-nitrogen austenitic stainless steel and manufacturing process thereof Download PDFInfo
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- CN112621018B CN112621018B CN202011451102.7A CN202011451102A CN112621018B CN 112621018 B CN112621018 B CN 112621018B CN 202011451102 A CN202011451102 A CN 202011451102A CN 112621018 B CN112621018 B CN 112621018B
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- welding
- stainless steel
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- nitrogen
- wire
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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
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3026—Mn as the principal constituent
-
- 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
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
- B23K35/0261—Rods, electrodes, wires
- B23K35/0266—Rods, electrodes, wires flux-cored
-
- 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
- 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
- B23K35/365—Selection of non-metallic compositions of coating materials either alone or conjoint with selection of soldering or welding materials
-
- 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
- B23K35/404—Coated rods; Coated electrodes
Abstract
The invention relates to a welding rod for high-nitrogen austenitic stainless steel, which comprises a coating and a core wire, wherein the coating is formed by press coating of a mixed agglomerate of a water glass solution and manganese powder, and the manganese powder accounts for 12-14% of the total welding rod by mass percent. The method improves the content of manganese element in the coating of the welding rod, improves the solid solubility of nitrogen element in the welding seam, reduces welding defects of pores, carbides and the like of the welding seam, and improves the welding quality. The use process of the invention is convenient and fast; the nitrogen content of the welding seam is improved to be more than 0.3 percent through the manganese content in the welding rod; reducing nitrogen holes in the welding seam and prolonging the fatigue life.
Description
Technical Field
The invention belongs to the technical field of manufacturing, and particularly relates to a welding rod for high-nitrogen austenitic stainless steel and a manufacturing process thereof.
Background
The high-nitrogen austenitic stainless steel is a novel material which replaces nickel element in steel by nitrogen element, thereby greatly reducing the cost of the material and avoiding the allergic reaction of human body caused by the nickel element. High nitrogen stainless steel has high strength, high plasticity and excellent corrosion resistance because of its high nitrogen content (> 0.4%). However, nitrogen escapes from the high-nitrogen stainless steel during welding, which causes welding problems such as nitrogen deficiency, nitrogen pores, nitrides and the like in a welding line, greatly reduces the mechanical property and corrosion resistance of a welding joint, and limits the use of the high-nitrogen stainless steel in a structural member. Generally, manganese is adopted in high-nitrogen stainless steel to dissolve nitrogen in a solid mode, and the effect of dissolving nitrogen in the material in a solid mode is achieved. At present, for traditional fusion welding, high-nitrogen stainless steel is difficult to be made into welding wires due to the fact that the manganese content is high and work hardening is easy to occur in drawing, and welding wires such as ER307Si are generally adopted to weld the high-nitrogen stainless steel at present. The solid solubility of nitrogen in steel can be increased by manganese, and the manganese content in the welding wire ER307Si is 6.0-8.0%, so that nitrogen escaping from a base material in the welding process cannot be completely dissolved in a welding seam, pores are formed in the welding seam, and fatigue cracks are easily formed along the pores in the use process.
Disclosure of Invention
The invention provides a welding rod for high-nitrogen austenitic stainless steel and a manufacturing process thereof, which solve the defects of the prior art.
In order to solve the technical problems, the invention provides a welding rod for high-nitrogen austenitic stainless steel, which comprises a flux coating and a core wire, and is characterized in that: the coating is formed by pressing and coating a mixed block of water glass solution and manganese powder, and the manganese powder accounts for 12-14% of the total welding rod by mass percent.
The process for manufacturing the welding rod is characterized by comprising the following specific steps of:
s1, preparing a wire rod for manufacturing the welding core, and then drawing wires by using a wire drawing machine and cutting wires by using a wire cutting machine;
s2, weighing the manganese powder, mixing the powder, checking, sieving, stirring and mixing the powder;
s3, preparing a water glass solution, continuously adding the water glass solution into the uniformly mixed manganese powder, and uniformly stirring to ensure that the manganese powder is not agglomerated and is a semisolid solution;
s4, conveying the stirred semi-solid solution to a block making machine for block making;
and S5, finally, conveying the block mass to a wire feeder, and performing press coating on the core wire to form the welding rod.
Has the advantages that: the method improves the content of manganese element in the coating of the welding rod, improves the solid solubility of nitrogen element in the welding seam, reduces welding defects of pores, carbides and the like of the welding seam, and improves the welding quality. The use process of the invention is convenient and fast; the nitrogen content of the welding seam is improved to be more than 0.3 percent through the manganese content in the welding rod; nitrogen holes in welding seams are reduced, and the fatigue life is prolonged.
Drawings
FIG. 1 is a schematic view of an electrode.
Detailed Description
In order to make the objects, contents and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention is provided.
The invention provides a welding rod for high-nitrogen austenitic stainless steel, which comprises a flux coating and a core wire, and is characterized in that: the coating is formed by pressing and coating a mixed block of a water glass solution and manganese powder, the manganese powder accounts for 12-14% of the total welding rod by mass, and the final components of the welding rod are as follows by mass:
the core wire material is H10Cr21Ni10Mn 6.
The mass ratio of the welding core is as follows:
a manufacturing process of a welding rod for high-nitrogen austenitic stainless steel comprises the following specific steps:
s1, preparing a wire rod for manufacturing the H10Cr21Ni10Mn6 welding core, and then drawing wires by using a wire drawing machine and cutting wires by using a wire cutting machine to reach the required diameter of 3mm and length of 350mm of the welding core;
s2, weighing the manganese powder, mixing the powder, checking, sieving, stirring and mixing the powder;
s3, preparing a water glass solution, continuously adding the water glass solution into the uniformly mixed manganese powder, and uniformly stirring to ensure that the manganese powder is not agglomerated and is a semisolid solution;
s4, conveying the stirred semi-solid solution to a block making machine for block making;
and S5, finally, conveying the block mass to a wire feeder, and performing press coating on the core wire to form the welding rod.
According to the invention, the yield of manganese element is prepared into powder according to 60%, so that the accuracy of the components is ensured; in the press coating process, an eccentricity instrument is used for ensuring that the welding core does not deviate; the powder mixing process ensures the uniformity of the powder.
The method improves the content of manganese element in the coating of the welding rod, improves the solid solubility of nitrogen element in the welding seam, reduces welding defects of pores, carbides and the like of the welding seam, and improves the welding quality.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (4)
1. The utility model provides an electrode for high nitrogen austenite stainless steel, includes coating and core wire, its characterized in that: the coating is formed by pressing and coating a mixed block of water glass solution and manganese powder, and the final components of the welding rod are as follows in mass ratio:
The mass ratio of the welding core is as follows:
。
2. The electrode for high nitrogen austenitic stainless steel of claim 1, characterized in that: the core wire material is H10Cr21Ni10Mn 6.
3. A process for manufacturing the electrode for high nitrogen austenitic stainless steel of claim 1, characterized by the following specific steps:
s1, preparing a wire rod for manufacturing the welding core, and then drawing wires by using a wire drawing machine and cutting wires by using a wire cutting machine;
s2, weighing the manganese powder, mixing the powder, checking, sieving, stirring and mixing the powder;
s3, preparing a water glass solution, continuously adding the water glass solution into the uniformly mixed manganese powder, and uniformly stirring to ensure that the manganese powder is not agglomerated and is a semisolid solution;
s4, conveying the stirred semi-solid solution to a block making machine for block making;
and S5, finally, conveying the block mass to a wire feeder, and performing press coating on the core wire to form the welding rod.
4. The process for manufacturing an electrode for a high nitrogen austenitic stainless steel according to claim 3, characterized in that the core wire has a diameter of 3mm and a length of 350 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011451102.7A CN112621018B (en) | 2020-12-09 | 2020-12-09 | Welding rod for high-nitrogen austenitic stainless steel and manufacturing process thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011451102.7A CN112621018B (en) | 2020-12-09 | 2020-12-09 | Welding rod for high-nitrogen austenitic stainless steel and manufacturing process thereof |
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| Publication Number | Publication Date |
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| CN112621018A CN112621018A (en) | 2021-04-09 |
| CN112621018B true CN112621018B (en) | 2022-08-12 |
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Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2167038C2 (en) * | 1999-08-10 | 2001-05-20 | Ворновицкий Иосиф Наумович | Electrode coating for welding |
| RU2383418C1 (en) * | 2008-09-10 | 2010-03-10 | Открытое акционерное общество "Западно-Сибирский металлургический комбинат" | Composition of charge for coating electrodes designed for welding low carbon steel |
| CN101456101A (en) * | 2008-10-17 | 2009-06-17 | 芜湖康泰科技有限公司 | Welding rod for cold welding steel rail |
| CN106736029B (en) * | 2016-12-21 | 2019-11-22 | 钢铁研究总院 | A kind of high-nitrogen austenitic stainless steel welding wire and its welding procedure |
| CN107127475B (en) * | 2017-03-23 | 2019-08-16 | 武汉铁锚焊接材料股份有限公司 | A kind of austenite stainless steel-made welding rod of resistance to non-oxidizable acid corrosion and its application |
| CN108526750B (en) * | 2018-04-08 | 2020-12-08 | 中国兵器科学研究院宁波分院 | High-strength high-toughness high-nitrogen austenitic stainless steel welding wire and preparation method thereof |
| CN108971795B (en) * | 2018-08-27 | 2020-04-17 | 中国船舶重工集团公司第七二五研究所 | Electric welding rod for high-manganese austenite low-temperature steel |
| CN111266761B (en) * | 2020-02-18 | 2020-12-11 | 哈尔滨焊接研究院有限公司 | Low-nickel nitrogen-containing austenitic stainless steel flux-cored wire and preparation method thereof |
| CN111136404B (en) * | 2020-02-18 | 2020-11-27 | 哈尔滨焊接研究院有限公司 | Low-nickel nitrogen-containing austenitic stainless steel welding rod and preparation method thereof |
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