CN112894200A - Flux-cored wire for welding and preparation method thereof - Google Patents
Flux-cored wire for welding and preparation method thereof Download PDFInfo
- Publication number
- CN112894200A CN112894200A CN202110113534.5A CN202110113534A CN112894200A CN 112894200 A CN112894200 A CN 112894200A CN 202110113534 A CN202110113534 A CN 202110113534A CN 112894200 A CN112894200 A CN 112894200A
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- CN
- China
- Prior art keywords
- flux
- welding
- cored
- wire
- steel strip
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- B23K35/3053—Fe as the principal constituent
- B23K35/3073—Fe as the principal constituent with Mn as next major 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
- B23K35/40—Making wire or rods for soldering or welding
- B23K35/406—Filled tubular wire or rods
Abstract
The invention discloses a flux-cored wire for welding and a preparation method thereof, wherein the flux-cored wire comprises the following components in percentage by mass: the flux core accounts for 0.5-2% of Si, 3-7% of Mn, 0.05-0.3% of Ti, 0.1-0.4% of NaF0, 0.5-0.8% of Nb0, 1.5-2.2% of smelting agent, 0.45-0.65% of Mg-Al alloy, 0.01-0.09% of B, 0.1-0.5% of Cu and the balance of Fe, and the materials are added into a ball mill and are ball-milled for 7-9h to obtain uniformly mixed flux core powder; rolling a steel strip with a set wall thickness and a set width to enable the cross section of the steel strip to be U-shaped, and then adding the flux-cored powder into the rolled steel strip; rolling the steel strip with the set thickness and the set width. According to the invention, the welding wire is obtained by adjusting the proportion of Si, Mn, Ti, NaF, Nb, a smelting agent, Mg-Al alloy, B, Cu and Fe in the flux core, so that the toughness and wear resistance of a welding part can be effectively improved, the strength and crack resistance of the flux-cored welding wire can be increased, the mechanical property of the flux-cored welding wire is improved by adding various alloy elements, and the chemical components and mechanical property of weld metal can meet the welding requirement of high strength.
Description
Technical Field
The invention relates to the technical field of flux-cored wires, in particular to a flux-cored wire for welding and a preparation method thereof.
Background
The flux-cored wire is also called flux-cored wire and tubular welding wire, and is divided into two main categories of gas-shielded protection and non-gas-shielded protection, the surface of the flux-cored welding wire is the same as that of a solid-cored welding wire, and the flux-cored welding wire is made of low-carbon steel or low-alloy steel with better plasticity.
When a luncheon disk is welded, a flux-cored wire is needed, and when the existing flux-cored wire is used, welding cracks are easy to generate, and during welding, the situations of scraps and slag removal are easy to generate.
Disclosure of Invention
The invention aims to provide a flux-cored wire for welding and a preparation method thereof, which aim to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a flux-cored welding wire for welding comprises the following components in percentage by mass: the flux core comprises 0.5-2% of Si, 78-7% of Mn3, 0.05-0.3% of Ti, 0.1-0.4% of NaF0, 0.5-0.8% of Nb0, 1.5-2.2% of smelting agent, 0.45-0.65% of Mg-Al alloy, 0.01-0.09% of B, 0.1-0.5% of Cu and the balance of Fe.
Preferably, the smelting agent is sodium silicate powder, feldspar and rutile in a mass ratio of 1: 1: 3-4, and smelting to prepare the product.
Preferably, the filling amount of the flux-cored wire is controlled to be 20-30%, and in the preparation process of the smelting agent, the smelting temperature is 800-1200 ℃, and the smelting time is 2-4 hours.
A preparation process of a flux-cored welding wire for welding comprises the following steps:
s1, adding the materials into a ball mill, and performing ball milling for 7-9h to obtain uniformly mixed flux core powder;
s2, rolling the steel strip with the set wall thickness and the set width to enable the cross section of the steel strip to be U-shaped, and then adding the flux-cored powder into the rolled steel strip;
s3, rolling the low-alloy high-strength steel strip into an O shape, and welding the O shape into a tubular shape by a contact welding method;
and S4, forming and reducing to obtain the flux-cored wire.
Preferably, after the medicine core powder is obtained, the powder is added into a vacuum heating furnace, the temperature is increased to 180-220 ℃, the temperature is kept for 1-3h, and the crystal water in the medicine powder is removed.
Preferably, the flux-cored wire is used for welding in a vertical direction, and the welding current is 270-290A.
Preference is given toWhen the flux-cored wire is used for welding, CO is adopted2And (5) gas protection.
Preferably, the flux-cored wire is used for welding steel plates with the yield strength not less than 400 MPa.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the welding wire is obtained by adjusting the proportion of Si, Mn, Ti, NaF, Nb, a smelting agent, Mg-Al alloy, B, Cu and Fe in the flux core, so that the toughness and wear resistance of a welding part can be effectively improved, the strength and crack resistance of the flux-cored welding wire can be increased, the mechanical property of the flux-cored welding wire is improved by adding various alloy elements, and the chemical components and mechanical property of weld metal can meet the welding requirement of high strength.
Detailed Description
The technical solutions in the embodiments of the present invention are 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 invention provides a technical scheme that:
a flux-cored welding wire for welding comprises the following components in percentage by mass: the welding wire is obtained by adjusting the proportion of Si, Mn, Ti, NaF, Nb, a smelting agent, Mg-Al alloy, B, Cu and Fe in the flux core to 0.5-2%, Mn 3-7%, Ti 0.05-0.3%, NaF 0.1-0.4%, Nb0.5-0.8%, the smelting agent 1.5-2.2%, Mg-Al alloy 0.45-0.65%, B0.01-0.09%, Cu 0.1-0.5% and the balance Fe, the toughness and wear resistance of the welding part can be effectively improved, the strength and crack resistance of the flux-cored welding wire can be increased, the mechanical property of the flux-cored welding wire is improved by adding various alloy elements, and the chemical composition and mechanical property of the welding seam metal can meet the requirement of high-strength welding.
A preparation process of a flux-cored welding wire for welding comprises the following steps:
s1, adding the materials into a ball mill, and performing ball milling for 7-9h to obtain uniformly mixed flux core powder;
s2, rolling the steel strip with the set wall thickness and the set width to enable the cross section of the steel strip to be U-shaped, and then adding the flux-cored powder into the rolled steel strip;
s3, rolling the low-alloy high-strength steel strip into an O shape, and welding the O shape into a tubular shape by a contact welding method;
and S4, forming and reducing to obtain the flux-cored wire.
The first embodiment is as follows:
a flux-cored welding wire for welding comprises the following components in percentage by mass: 0.5% of Si, 3% of Mn, 0.05% of Ti0.05%, 0.1% of NaF0, 0.5% of Nb0.5%, 1.5% of smelting agent, 0.45% of Mg-Al alloy, 0.01% of B, 0.1% of Cu0.1% and the balance of Fe.
The preparation method comprises the following steps: firstly, adding the material into a ball mill, performing ball milling for 7-9h to obtain uniformly mixed drug core powder, adding the powder into a vacuum heating furnace after obtaining the drug core powder, heating to 180-220 ℃, preserving heat for 1-3h, and removing crystal water in the drug powder; then rolling the steel strip with the set wall thickness and the set width to enable the cross section of the steel strip to be U-shaped, and then adding the flux-cored powder into the rolled steel strip; then rolling the low-alloy high-strength steel strip into an O shape, welding the O shape into a tubular shape by a contact welding method, using a flux-cored wire for vertical upward welding, wherein the welding current is 270-290A, and using CO during welding of the flux-cored wire2Gas protection, wherein the flux-cored wire is used for welding a steel plate with the yield strength not less than 400 MPa; and finally, forming and reducing to obtain the flux-cored wire.
Example two:
a flux-cored welding wire for welding comprises the following components in percentage by mass: 0.9% of Si, 3.8% of Mn3.1%, 0.1% of Ti0.2%, 0.6% of NaFb, 1.9% of smelting agent, 0.5% of Mg-Al alloy, 0.05% of B, 0.2% of Cu0.2% and the balance of Fe.
The preparation method comprises the following steps: firstly, adding the material into a ball mill, performing ball milling for 7-9h to obtain uniformly mixed drug core powder, adding the powder into a vacuum heating furnace after obtaining the drug core powder, heating to 180-220 ℃, preserving heat for 1-3h, and removing crystal water in the drug powder; then rolling the steel strip with the set wall thickness and the set widthThe cross section is U-shaped, and then the flux-cored powder is added into a rolled steel strip; then rolling the low-alloy high-strength steel strip into an O shape, welding the O shape into a tubular shape by a contact welding method, using a flux-cored wire for vertical upward welding, wherein the welding current is 270-290A, and using CO during welding of the flux-cored wire2Gas protection, wherein the flux-cored wire is used for welding a steel plate with the yield strength not less than 400 MPa; and finally, forming and reducing to obtain the flux-cored wire.
Example three:
a flux-cored welding wire for welding comprises the following components in percentage by mass: 1.3 percent of Si, 4.5 percent of Mn0.15 percent of Ti, 0.25 percent of NaF0, 0.7 percent of Nb0.7 percent of smelting agent 2 percent of Mg-Al alloy 0.55 percent of B, 0.06 percent of Cu0.3 percent of Cu, and the balance of Fe.
The preparation method comprises the following steps: firstly, adding the material into a ball mill, performing ball milling for 7-9h to obtain uniformly mixed drug core powder, adding the powder into a vacuum heating furnace after obtaining the drug core powder, heating to 180-220 ℃, preserving heat for 1-3h, and removing crystal water in the drug powder; then rolling the steel strip with the set wall thickness and the set width to enable the cross section of the steel strip to be U-shaped, and then adding the flux-cored powder into the rolled steel strip; then rolling the low-alloy high-strength steel strip into an O shape, welding the O shape into a tubular shape by a contact welding method, using a flux-cored wire for vertical upward welding, wherein the welding current is 270-290A, and using CO during welding of the flux-cored wire2Gas protection, wherein the flux-cored wire is used for welding a steel plate with the yield strength not less than 400 MPa; and finally, forming and reducing to obtain the flux-cored wire.
Example four:
a flux-cored welding wire for welding comprises the following components in percentage by mass: 1.6 percent of Si, 5.5 percent of Mn5.2 percent of Ti, 0.3 percent of NaF0.75 percent of Nb0.75 percent of smelting agent, 0.6 percent of Mg-Al alloy, 0.75 percent of B, 0.4 percent of Cu0.4 percent of Fe in balance.
The preparation method comprises the following steps: firstly, adding the material into a ball mill, performing ball milling for 7-9h to obtain uniformly mixed drug core powder, adding the powder into a vacuum heating furnace after obtaining the drug core powder, heating to 180-220 ℃, preserving heat for 1-3h, and removing crystal water in the drug powder; then setting the wall thickness androlling a steel strip with a fixed width to enable the cross section of the steel strip to be U-shaped, and then adding the flux-cored powder into the rolled steel strip; then rolling the low-alloy high-strength steel strip into an O shape, welding the O shape into a tubular shape by a contact welding method, using a flux-cored wire for vertical upward welding, wherein the welding current is 270-290A, and using CO during welding of the flux-cored wire2Gas protection, wherein the flux-cored wire is used for welding a steel plate with the yield strength not less than 400 MPa; and finally, forming and reducing to obtain the flux-cored wire.
Example five:
a flux-cored welding wire for welding comprises the following components in percentage by mass: si 2%, Mn 7%, Ti0.3%, NaF0.4%, Nb0.8%, smelting agent 2.2%, Mg-Al alloy 0.65%, B0.09%, Cu0.5%, and the balance of Fe.
The preparation method comprises the following steps: firstly, adding the material into a ball mill, performing ball milling for 7-9h to obtain uniformly mixed drug core powder, adding the powder into a vacuum heating furnace after obtaining the drug core powder, heating to 180-220 ℃, preserving heat for 1-3h, and removing crystal water in the drug powder; then rolling the steel strip with the set wall thickness and the set width to enable the cross section of the steel strip to be U-shaped, and then adding the flux-cored powder into the rolled steel strip; then rolling the low-alloy high-strength steel strip into an O shape, welding the O shape into a tubular shape by a contact welding method, using a flux-cored wire for vertical upward welding, wherein the welding current is 270-290A, and using CO during welding of the flux-cored wire2Gas protection, wherein the flux-cored wire is used for welding a steel plate with the yield strength not less than 400 MPa; finally, the flux-cored wire is obtained after forming and reducing
According to the invention, the welding wire is obtained by adjusting the proportion of Si, Mn, Ti, NaF, Nb, a smelting agent, Mg-Al alloy, B, Cu and Fe in the flux core, so that the toughness and wear resistance of a welding part can be effectively improved, the strength and crack resistance of the flux-cored welding wire can be increased, the mechanical property of the flux-cored welding wire is improved by adding various alloy elements, and the chemical components and mechanical property of weld metal can meet the welding requirement of high strength.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A flux-cored welding wire for welding, characterized in that: the components by mass percentage are as follows: the flux core comprises 0.5-2% of Si, 78-7% of Mn3, 0.05-0.3% of Ti, 0.1-0.4% of NaF0, 0.5-0.8% of Nb0, 1.5-2.2% of smelting agent, 0.45-0.65% of Mg-Al alloy, 0.01-0.09% of B, 0.1-0.5% of Cu and the balance of Fe.
2. A flux-cored welding wire for welding as set forth in claim 1, wherein: the smelting agent is prepared from sodium silicate powder, feldspar and rutile according to the mass ratio of 1: 1: 3-4, and smelting to prepare the product.
3. A flux-cored welding wire for welding as set forth in claim 1, wherein: the filling amount of the flux-cored wire is controlled to be 20-30%, the smelting temperature is 800-.
4. A preparation process of a flux-cored welding wire for welding is characterized by comprising the following steps of: the method comprises the following steps:
s1, adding the materials into a ball mill, and performing ball milling for 7-9h to obtain uniformly mixed flux core powder;
s2, rolling the steel strip with the set wall thickness and the set width to enable the cross section of the steel strip to be U-shaped, and then adding the flux-cored powder into the rolled steel strip;
s3, rolling the low-alloy high-strength steel strip into an O shape, and welding the O shape into a tubular shape by a contact welding method;
and S4, forming and reducing to obtain the flux-cored wire.
5. The process for preparing a flux-cored welding wire for welding as set forth in claim 4, wherein: after the medicine core powder is obtained, adding the powder into a vacuum heating furnace, heating to 180-220 ℃, preserving the heat for 1-3h, and removing crystal water in the medicine powder.
6. The process for preparing a flux-cored welding wire for welding as set forth in claim 4, wherein: the flux-cored wire is used for vertical upward welding, and the welding current is 270-290A.
7. The process for preparing a flux-cored welding wire for welding as set forth in claim 4, wherein: when the flux-cored wire is used for welding, CO is adopted2And (5) gas protection.
8. The process for preparing a flux-cored welding wire for welding as set forth in claim 4, wherein: the flux-cored wire is used for welding steel plates with the yield strength not less than 400 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110113534.5A CN112894200A (en) | 2021-01-27 | 2021-01-27 | Flux-cored wire for welding and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110113534.5A CN112894200A (en) | 2021-01-27 | 2021-01-27 | Flux-cored wire for welding and preparation method thereof |
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| CN112894200A true CN112894200A (en) | 2021-06-04 |
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| CN202110113534.5A Pending CN112894200A (en) | 2021-01-27 | 2021-01-27 | Flux-cored wire for welding and preparation method thereof |
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|---|---|---|---|---|
| CN1603055A (en) * | 2004-11-15 | 2005-04-06 | 攀钢集团攀枝花钢铁研究院 | Flux-cored wire for supporting roller built-up welding |
| US20120085513A1 (en) * | 2009-06-15 | 2012-04-12 | Nisshin Steel Co., Ltd. | Ferritic stainless steel material for brazing and heat exchanger member |
| JP2013204103A (en) * | 2012-03-29 | 2013-10-07 | Jfe Steel Corp | High strength welded steel pipe for low temperature use having superior buckling resistance, and method for producing the same, and method for producing steel sheet for high strength welded steel pipe for low temperature use having superior buckling resistance |
| CN104722962A (en) * | 2015-04-10 | 2015-06-24 | 首钢总公司 | High-strength high-toughness gas shield flux-cored wire for high-strength steel |
| CN105127613A (en) * | 2015-10-12 | 2015-12-09 | 国家电网公司 | Flux-cored wire for welding Q420 steel and preparation method thereof |
| CN107186380A (en) * | 2017-05-12 | 2017-09-22 | 天长市通联焊业有限公司 | A kind of abrasion-proof overlaying welding flux-cored wire |
| CN108393609A (en) * | 2017-02-08 | 2018-08-14 | 张宇 | Flux-cored wire and gas shield welding connect method |
| CN109530962A (en) * | 2018-11-21 | 2019-03-29 | 武汉铁锚焊接材料股份有限公司 | A kind of high current vertical-up welding connects with flux-cored wire and the preparation method and application thereof |
-
2021
- 2021-01-27 CN CN202110113534.5A patent/CN112894200A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1603055A (en) * | 2004-11-15 | 2005-04-06 | 攀钢集团攀枝花钢铁研究院 | Flux-cored wire for supporting roller built-up welding |
| US20120085513A1 (en) * | 2009-06-15 | 2012-04-12 | Nisshin Steel Co., Ltd. | Ferritic stainless steel material for brazing and heat exchanger member |
| JP2013204103A (en) * | 2012-03-29 | 2013-10-07 | Jfe Steel Corp | High strength welded steel pipe for low temperature use having superior buckling resistance, and method for producing the same, and method for producing steel sheet for high strength welded steel pipe for low temperature use having superior buckling resistance |
| CN104722962A (en) * | 2015-04-10 | 2015-06-24 | 首钢总公司 | High-strength high-toughness gas shield flux-cored wire for high-strength steel |
| CN105127613A (en) * | 2015-10-12 | 2015-12-09 | 国家电网公司 | Flux-cored wire for welding Q420 steel and preparation method thereof |
| CN108393609A (en) * | 2017-02-08 | 2018-08-14 | 张宇 | Flux-cored wire and gas shield welding connect method |
| CN107186380A (en) * | 2017-05-12 | 2017-09-22 | 天长市通联焊业有限公司 | A kind of abrasion-proof overlaying welding flux-cored wire |
| CN109530962A (en) * | 2018-11-21 | 2019-03-29 | 武汉铁锚焊接材料股份有限公司 | A kind of high current vertical-up welding connects with flux-cored wire and the preparation method and application thereof |
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Application publication date: 20210604 |