CN110977251A - Method for improving impact toughness of stainless steel welding rod at low temperature - Google Patents
Method for improving impact toughness of stainless steel welding rod at low temperature Download PDFInfo
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- CN110977251A CN110977251A CN201911357058.0A CN201911357058A CN110977251A CN 110977251 A CN110977251 A CN 110977251A CN 201911357058 A CN201911357058 A CN 201911357058A CN 110977251 A CN110977251 A CN 110977251A
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- welding rod
- rod coating
- welding
- stainless steel
- impact toughness
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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
- B23K35/365—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
- B23K35/02—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
- B23K35/0272—Rods, electrodes, wires with more than one layer of coating or sheathing material
-
- 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
- B23K35/3608—Titania or titanates
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The invention discloses a method for improving the impact toughness of a stainless steel welding rod at low temperature, which is characterized by comprising the following steps of: 1) selecting a welding core with the model number of 316L; 2) preparing a welding rod coating: the welding rod coating comprises the following components in percentage by weight: 22-25% of marble, 7-8% of fluorite, 29-31% of rutile, 1-3% of cryolite, 5-7% of ferrotitanium, 5-7% of chromium metal, 5-7% of ferrotungsten, 2.5-3.0% of ferromolybdenum, 5.0-6.5% of electrolytic manganese, 5-7% of nickel powder, 1.0-2.0% of phlogopite, 0.5-1.0% of feldspar and 0.5-1.0% of kaolin; 3) fully mixing and uniformly stirring the components of the welding rod coating weighed in the step 2) to obtain a welding rod coating prefabricated material; 4) and (3) pressing and coating the welding rod coating prefabricated material on the welding core in the step 1) to finish the preparation of the stainless steel welding rod with good impact toughness at low temperature. The invention can improve the impact toughness of the stainless steel welding rod at low temperature, so that the impact value of the welding rod at low temperature (-196 ℃) in a solid solution state after welding reaches 78-85J, and the requirements of users are met.
Description
Technical Field
The invention relates to the technical field of welding production, in particular to a method for improving the impact toughness of a stainless steel welding rod at low temperature.
Background
The metal core of the electrode covered by the coating is called the core wire. The core wire is typically a steel wire having a length and diameter. During welding, the core wire has two functions: firstly, the welding current is conducted, electric arc is generated to convert electric energy into heat energy, and secondly, the welding core is melted to be used as filling metal to be fused with liquid base metal to form a welding seam. When the welding rod is used for welding, the core metal accounts for a part of the whole weld metal, so that the chemical components of the core directly influence the quality of the weld. Therefore, the steel wire used as the core wire of the electrode wire is individually specified in its grade and composition.
The existing welding rod for welding 18-10-2 type austenitic stainless steel has the low-temperature (-196 ℃) impact value of 30-40J in a welding state and the low-temperature (-196 ℃) impact value of 40-50J in a post-welding solid solution state, and cannot meet the requirement that the low-temperature (-196 ℃) impact value of some users in the post-welding solid solution state is more than or equal to 60J.
Disclosure of Invention
The invention provides a method for improving the impact toughness of a stainless steel welding rod at low temperature, which can effectively solve the technical problems mentioned in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a method of improving the impact toughness of a stainless steel electrode at low temperatures comprising the steps of:
1) selecting a welding core with the model number of 316L;
2) preparing a welding rod coating: the welding rod coating comprises the following components in percentage by weight: 22-25% of marble, 7-8% of fluorite, 29-31% of rutile, 1-3% of cryolite, 5-7% of ferrotitanium, 5-7% of chromium metal, 5-7% of ferrotungsten, 2.5-3.0% of ferromolybdenum, 5.0-6.5% of electrolytic manganese, 5-7% of nickel powder, 1.0-2.0% of phlogopite, 0.5-1.0% of feldspar and 0.5-1.0% of kaolin;
processing the components in the welding rod coating into powder, and weighing the components in the welding rod coating according to the percentage;
3) fully mixing and uniformly stirring the components of the welding rod coating weighed in the step 2) to obtain a welding rod coating prefabricated material;
4) and (3) pressing and coating the welding rod coating prefabricated material on the welding core in the step 1) to finish the preparation of the stainless steel welding rod with good impact toughness at low temperature.
Preferably, the welding rod coating comprises the following components in percentage by weight: 23% of marble, 7% of fluorite, 30% of rutile, 1% of cryolite, 6% of ferrotitanium, 7% of chromium metal, 5% of ferrotungsten, 2.5% of ferromolybdenum, 5.0% of electrolytic manganese, 5% of nickel powder, 2.0% of phlogopite, 0.5% of feldspar and 0.5% of kaolin.
Preferably, the welding rod coating comprises the following components in percentage by weight: 22% of marble, 8% of fluorite, 31% of rutile, 1% of cryolite, 5% of ferrotitanium, 6% of chromium metal, 5% of ferrotungsten, 2.5% of ferromolybdenum, 6.5% of electrolytic manganese, 5% of nickel powder, 2.0% of phlogopite, 1.0% of feldspar and 1.0% of kaolin.
Preferably, the welding rod coating also comprises a binder.
Preferably, the binder is water glass.
Compared with the prior art, the invention has the beneficial effects that:
316L with low contents of sulfur and phosphorus is selected as the core wire of the welding rod prepared by the invention, the coating of the welding rod adopts an alkaline slag system, the contents of Cr and Ni elements in the coating are adjusted to form low ferrite, and the content of Mn element is increased, so that the prepared welding rod has stable electric arc, attractive appearance and small splashing, and the low-temperature (-196 ℃) impact value reaches 78-85J in a solid solution state after welding, thereby meeting the requirements of users.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described 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.
The first embodiment is as follows:
a method of improving the impact toughness of a stainless steel electrode at low temperatures comprising the steps of:
1) selecting a welding core with the model number of 316L;
2) preparing a welding rod coating: the welding rod coating comprises the following components in percentage by weight: 23% of marble, 7% of fluorite, 30% of rutile, 1% of cryolite, 6% of ferrotitanium, 7% of chromium metal, 5% of ferrotungsten, 2.5% of ferromolybdenum, 5.0% of electrolytic manganese, 5% of nickel powder, 2.0% of phlogopite, 0.5% of feldspar and 0.5% of kaolin;
processing the components in the welding rod coating into powder, and weighing the components in the welding rod coating according to the percentage;
3) fully mixing and uniformly stirring the components of the welding rod coating weighed in the step 2) to obtain a welding rod coating prefabricated material;
4) and (3) pressing and coating the welding rod coating prefabricated material on the welding core in the step 1) to finish the preparation of the stainless steel welding rod with good impact toughness at low temperature.
Example two:
a method of improving the impact toughness of a stainless steel electrode at low temperatures comprising the steps of:
1) selecting a welding core with the model number of 316L;
2) preparing a welding rod coating: the welding rod coating comprises the following components in percentage by weight: 22% of marble, 8% of fluorite, 31% of rutile, 1% of cryolite, 5% of ferrotitanium, 6% of chromium metal, 5% of ferrotungsten, 2.5% of ferromolybdenum, 6.5% of electrolytic manganese, 5% of nickel powder, 2.0% of phlogopite, 1.0% of feldspar and 1.0% of kaolin;
processing the components in the welding rod coating into powder, and weighing the components in the welding rod coating according to the percentage;
3) fully mixing and uniformly stirring the components of the welding rod coating weighed in the step 2) to obtain a welding rod coating prefabricated material;
4) and (3) pressing and coating the welding rod coating prefabricated material on the welding core in the step 1) to finish the preparation of the stainless steel welding rod with good impact toughness at low temperature.
Example three:
a method of improving the impact toughness of a stainless steel electrode at low temperatures comprising the steps of:
1) selecting a welding core with the model number of 316L;
2) preparing a welding rod coating: the welding rod coating comprises the following components in percentage by weight: 22% of marble, 8% of fluorite, 31% of rutile, 1% of cryolite, 5% of ferrotitanium, 6% of chromium metal, 5% of ferrotungsten, 2.5% of ferromolybdenum, 6.5% of electrolytic manganese, 5% of nickel powder, 2.0% of phlogopite, 1.0% of feldspar and 1.0% of kaolin;
processing the components in the welding rod coating into powder, and weighing the components in the welding rod coating according to the percentage;
3) fully mixing and uniformly stirring the components of the welding rod coating weighed in the step 2), and then adding a binder into the mixture to obtain a welding rod coating prefabricated material;
4) and (3) pressing and coating the welding rod coating prefabricated material on the welding core in the step 1) to finish the preparation of the stainless steel welding rod with good impact toughness at low temperature.
Example four:
a method of improving the impact toughness of a stainless steel electrode at low temperatures comprising the steps of:
1) selecting a welding core with the model number of 316L;
2) preparing a welding rod coating: the welding rod coating comprises the following components in percentage by weight: 22% of marble, 8% of fluorite, 31% of rutile, 1% of cryolite, 5% of ferrotitanium, 6% of chromium metal, 5% of ferrotungsten, 2.5% of ferromolybdenum, 6.5% of electrolytic manganese, 5% of nickel powder, 2.0% of phlogopite, 1.0% of feldspar and 1.0% of kaolin;
processing the components in the welding rod coating into powder, and weighing the components in the welding rod coating according to the percentage;
3) fully mixing and uniformly stirring the components of the welding rod coating weighed in the step 2), and then adding a binder into the mixture, wherein the binder is water glass, so as to obtain a welding rod coating prefabricated material;
4) and (3) pressing and coating the welding rod coating prefabricated material on the welding core in the step 1) to finish the preparation of the stainless steel welding rod with good impact toughness at low temperature.
Example five:
a method of improving the impact toughness of a stainless steel electrode at low temperatures comprising the steps of:
1) selecting a welding core with the model number of 316L;
2) preparing a welding rod coating: the welding rod coating comprises the following components in percentage by weight: 23% of marble, 8% of fluorite, 29% of rutile, 3% of cryolite, 5% of ferrotitanium, 5% of chromium metal, 7% of ferrotungsten, 3.0% of ferromolybdenum, 5.0% of electrolytic manganese, 7% of nickel powder, 2.0% of phlogopite, 1.0% of feldspar, 0.5% of kaolin and 1% of binder;
processing the components in the welding rod coating into powder, and weighing the components in the welding rod coating according to the percentage;
3) fully mixing and uniformly stirring the components of the welding rod coating weighed in the step 2), and then adding a binder into the mixture, wherein the binder is water glass, so as to obtain a welding rod coating prefabricated material;
4) and (3) pressing and coating the welding rod coating prefabricated material on the welding core in the step 1) to finish the preparation of the stainless steel welding rod with good impact toughness at low temperature.
316L with low contents of sulfur and phosphorus is selected as the core wire of the welding rod prepared by the invention, the coating of the welding rod adopts an alkaline slag system, the contents of Cr and Ni elements in the coating are adjusted to form low ferrite, and the content of Mn element is increased, so that the prepared welding rod has stable electric arc, attractive appearance and small splashing, and the low-temperature (-196 ℃) impact value reaches 78-85J in a solid solution state after welding, thereby meeting the requirements of users.
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims.
Claims (5)
1. A method for improving the impact toughness of a stainless steel welding rod at low temperature is characterized by comprising the following steps:
1) selecting a welding core with the model number of 316L;
2) preparing a welding rod coating: the welding rod coating comprises the following components in percentage by weight: 22-25% of marble, 7-8% of fluorite, 29-31% of rutile, 1-3% of cryolite, 5-7% of ferrotitanium, 5-7% of chromium metal, 5-7% of ferrotungsten, 2.5-3.0% of ferromolybdenum, 5.0-6.5% of electrolytic manganese, 5-7% of nickel powder, 1.0-2.0% of phlogopite, 0.5-1.0% of feldspar and 0.5-1.0% of kaolin;
processing the components in the welding rod coating into powder, and weighing the components in the welding rod coating according to the percentage;
3) fully mixing and uniformly stirring the components of the welding rod coating weighed in the step 2) to obtain a welding rod coating prefabricated material;
4) and (3) pressing and coating the welding rod coating prefabricated material on the welding core in the step 1) to finish the preparation of the stainless steel welding rod with good impact toughness at low temperature.
2. The method of improving the impact toughness of a stainless steel electrode at low temperatures of claim 1, wherein: the welding rod coating comprises the following components in percentage by weight: 23% of marble, 7% of fluorite, 30% of rutile, 1% of cryolite, 6% of ferrotitanium, 7% of chromium metal, 5% of ferrotungsten, 2.5% of ferromolybdenum, 5.0% of electrolytic manganese, 5% of nickel powder, 2.0% of phlogopite, 0.5% of feldspar and 0.5% of kaolin.
3. The method of improving the impact toughness of a stainless steel electrode at low temperatures of claim 1, wherein: the welding rod coating comprises the following components in percentage by weight: 22% of marble, 8% of fluorite, 31% of rutile, 1% of cryolite, 5% of ferrotitanium, 6% of chromium metal, 5% of ferrotungsten, 2.5% of ferromolybdenum, 6.5% of electrolytic manganese, 5% of nickel powder, 2.0% of phlogopite, 1.0% of feldspar and 1.0% of kaolin.
4. A method of improving the impact toughness of a stainless steel electrode at low temperatures according to any one of claims 1 to 3, wherein: the welding rod coating also comprises a binder.
5. The method of improving the impact toughness of a stainless steel electrode at low temperatures of claim 4, wherein: the binder is water glass.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911357058.0A CN110977251A (en) | 2019-12-25 | 2019-12-25 | Method for improving impact toughness of stainless steel welding rod at low temperature |
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| CN201911357058.0A CN110977251A (en) | 2019-12-25 | 2019-12-25 | Method for improving impact toughness of stainless steel welding rod at low temperature |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102233490A (en) * | 2010-04-27 | 2011-11-09 | 昆山京群焊材科技有限公司 | Austenitic electrode |
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| CN102554499A (en) * | 2010-12-28 | 2012-07-11 | 昆山京群焊材科技有限公司 | Ultralow-temperature high-corrosion-resistance welding rod |
| CN103706963A (en) * | 2013-12-11 | 2014-04-09 | 四川大西洋焊接材料股份有限公司 | Stainless steel welding electrode used for third-generation nuclear power main pipeline and production method of stainless steel welding electrode |
| CN103921018A (en) * | 2014-04-25 | 2014-07-16 | 湖北船王特种焊材有限公司 | Superaustenitic stainless steel electrode |
| CN104175018A (en) * | 2014-08-20 | 2014-12-03 | 四川大西洋焊接材料股份有限公司 | Duplex stainless steel welding electrode for third-generation nuclear power equipment and duplex stainless steel welding electrode production method |
| CN105537801A (en) * | 2015-09-01 | 2016-05-04 | 上海大西洋焊接材料有限责任公司 | Stainless steel welding rod used for 904 L steel welding |
| CN105665959A (en) * | 2016-03-30 | 2016-06-15 | 北京工业大学 | Overlaying flux-cored wire for welding and repairing die-casting dies |
| CN110170765A (en) * | 2019-05-24 | 2019-08-27 | 四川大西洋焊接材料股份有限公司 | The mating acidic electrode of high Manganese Austenitic Cryogenic Steels of LNG storage tank peculiar to vessel and preparation method |
-
2019
- 2019-12-25 CN CN201911357058.0A patent/CN110977251A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102233490A (en) * | 2010-04-27 | 2011-11-09 | 昆山京群焊材科技有限公司 | Austenitic electrode |
| CN102528320A (en) * | 2010-12-28 | 2012-07-04 | 昆山京群焊材科技有限公司 | Ultralow-temperature high-toughness austenitic electrode |
| CN102554499A (en) * | 2010-12-28 | 2012-07-11 | 昆山京群焊材科技有限公司 | Ultralow-temperature high-corrosion-resistance welding rod |
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| CN105537801A (en) * | 2015-09-01 | 2016-05-04 | 上海大西洋焊接材料有限责任公司 | Stainless steel welding rod used for 904 L steel welding |
| CN105665959A (en) * | 2016-03-30 | 2016-06-15 | 北京工业大学 | Overlaying flux-cored wire for welding and repairing die-casting dies |
| CN110170765A (en) * | 2019-05-24 | 2019-08-27 | 四川大西洋焊接材料股份有限公司 | The mating acidic electrode of high Manganese Austenitic Cryogenic Steels of LNG storage tank peculiar to vessel and preparation method |
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Application publication date: 20200410 |
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