CN111014952A - Welding method of cold-rolled 25# steel solid laser welding machine - Google Patents
Welding method of cold-rolled 25# steel solid laser welding machine Download PDFInfo
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- CN111014952A CN111014952A CN201911389927.8A CN201911389927A CN111014952A CN 111014952 A CN111014952 A CN 111014952A CN 201911389927 A CN201911389927 A CN 201911389927A CN 111014952 A CN111014952 A CN 111014952A
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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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
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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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses a welding method of a cold-rolled 25# steel solid laser welding machine, which comprises the following welding technological parameters: the thickness of the strip steel is 3.0mm, the welding speed is 2.5, the welding power is 6800, the defocusing amount is-8, the welding pressure is 25, the butt joint gap is 0.25os, the butt joint gap is 0.25ds, and the wire filling speed is 0; the thickness of the strip steel is 3.5mm, the welding speed is 2.3, the welding power is 6900, the defocusing amount is-8, the welding pressure is 30, the butt joint gap is 0.3os, the butt joint gap is 0.3ds, and the wire filling speed is 0. The invention can greatly improve the product manufacturing capability of the cold rolling and acid tandem rolling unit and can be applied to the fields of industrial mass production and the like.
Description
Technical Field
The invention relates to a welding method of a cold-rolled 25# steel solid laser welding machine.
Background
The strip steel raw material is mainly characterized in that w (C), w (Mn) are higher, and w (S) and w (P) are lower. After the transformation of acid tandem rolling of eight steel in 6 months in 2018 is finished, the product structure is adjusted by the cold rolling of eight steel along with the improvement of the equipment capacity, the product variety and the specification are expanded to thicker products with the limit specification and high-strength steel, and aiming at the problem of development and trial production of the new product 25# steel of the cold rolling of eight steel, the capacity of the cold rolling product is expanded, and the cold rolling market competitiveness is improved by researching welding process parameters and improving the equipment function precision and conducting trial production on the new product 25# steel of the cold rolling of eight steel for multiple times.
Due to the importance of weld quality in the pickling line, the choice of welder is often representative of the process equipment level of the line. At present, the application of domestic laser welding in a cold-rolling combined unit is widely accepted, related research is gradually increased, how to use a laser welding machine to continuously obtain the optimal welding process parameters of new high-strength steel, and the thinner and harder steel is ensured not to break in an acid rolling line, so that the cold-rolling laser welding combined unit becomes a new target for the development of cold-rolling laser welding application technology. The application of the new welding process in the cold rolling industry also brings new challenges, the adjustment of laser welding process parameters is more complicated, the mechanism influencing the quality of welding seams has certain cognitive difficulty, and the requirement on the combination of technical personnel and equipment process knowledge in a steel rolling mill is higher. The welding quality is always the highest of the unit production, and at present, the laser welding process parameter research and application level of the unit determines the production capacity and new product development capacity of the acid rolling production line. The 25# steel raw material is mainly characterized by higher w (C), w (Mn) and lower w (S) and w (P), the steel type adopts a preheating-welding-annealing process when a laser welding machine of a domestic acid tandem rolling unit is used for welding, the weld quality can be completely ensured, an eight-steel company adopts a Wuhan Kargi laser welding machine, the laser welding machine is not provided with a preheating and annealing device, the welding machine can not completely exert the design capability, the production requirement can not be obviously met in the actual production process in the face of the trend that the specification of a steel type produced by a production line is frequently changed and the orders of a high-strength high-grade steel type are increased, the weld quality defect can further cause multiple band breakage accidents, and the high-strength steel can not be produced and supplied in batches due to the fact that the optimal laser welding process combination parameters of the high-strength difficult-welding steel can not be obtained. Therefore, the research on the mechanism of cold-rolled steel strip laser welding process parameter setting and the optimization and application of high-strength steel laser welding process parameters become particularly important, and the production and operation of a cold-rolled combined unit and the market expansion of new products are directly influenced.
Disclosure of Invention
The invention aims to provide a welding method of a cold-rolled 25# steel solid laser welding machine, which enlarges a cold-rolled product, improves the productivity of the product, has important practical value in production and is successfully applied to industrial mass production.
The purpose of the invention is realized as follows: a welding method of a cold-rolled 25# steel solid laser welding machine comprises the following welding technological parameters: the thickness of the strip steel is 3.0mm, the welding speed is 2.5, the welding power is 6800, the defocusing amount is-8, the welding pressure is 25, the butt joint gap is 0.25os, the butt joint gap is 0.25ds, and the wire filling speed is 0; the thickness of the strip steel is 3.5mm, the welding speed is 2.3, the welding power is 6900, the defocusing amount is-8, the welding pressure is 30, the butt joint gap is 0.3os, the butt joint gap is 0.3ds, and the wire filling speed is 0.
The welding method mainly realizes the welding process of the high-strength and high-rigidity solid laser welding machine, and the cold rolling trial-produced 25# high-strength steel has excellent performance such as good welding seam quality of the solid laser welding machine and the like, thereby meeting the continuous rolling requirement. According to the invention, the mechanism of cold-rolled strip steel laser welding process parameter setting is researched through comparison and judgment of the quality of the welding seam of the laser welding machine, the high-strength steel laser welding process parameter is adjusted and researched, and the 25# high-strength steel laser welding process is preferably suitable for successful development and production. The technology is mainly used for welding the cold-rolled 25# steel solid laser welder, and can greatly improve the product manufacturing capacity of the cold-rolled acid tandem mill unit. The product can be applied to the fields of industrial mass production and the like.
Detailed Description
A welding method of a cold-rolled 25# steel solid laser welding machine comprises the following welding technological parameters: the thickness of the strip steel is 3.0mm, the welding speed is 2.5, the welding power is 6800, the defocusing amount is-8, the welding pressure is 25, the butt joint gap is 0.25os, the butt joint gap is 0.25ds, and the wire filling speed is 0; the thickness of the strip steel is 3.5mm, the welding speed is 2.3, the welding power is 6900, the defocusing amount is-8, the welding pressure is 30, the butt joint gap is 0.3os, the butt joint gap is 0.3ds, and the wire filling speed is 0.
Example 1
1. The 25# steel is welded by the laser welding machine,
the steel grade (25 #), the thickness of 3.0mm, the laser welding machine carries on the welding, the welding seam carries on the cupping experiment. The conclusion is obtained by observing the appearance of the welding seam and the appearance of the welding seam after cupping, and the welding seam presents the imagination of welding impermeability or welding seam cracking after cupping caused by material brittleness under the condition of lacking a welding seam preheating and annealing functional device.
2. Through the judgment of the quality of the welding seam, the self preheating and annealing function limit of a laser welding machine is broken through, the welding process parameters are researched and adjusted, a large number of welding experiments are carried out, and the following welding parameters are selected:
according to the experimental result, the welding test 5 is selected as the optimal welding parameter (the transmission side butt joint gap equipment benchmark is corrected to-0.05 mm).
3. Step three: tracking the production process of 25# steel with the thickness of 3.0-3.5-3.0mm on site, and finally forming welding process parameters as follows:
the welding parameters are used in the production process, and the quality of the welding seam is good.
Claims (1)
1. A welding method of a cold-rolled 25# steel solid laser welding machine is characterized by comprising the following steps: the welding process parameters are as follows: the thickness of the strip steel is 3.0mm, the welding speed is 2.5, the welding power is 6800, the defocusing amount is-8, the welding pressure is 25, the butt joint gap is 0.25os, the butt joint gap is 0.25ds, and the wire filling speed is 0; the thickness of the strip steel is 3.5mm, the welding speed is 2.3, the welding power is 6900, the defocusing amount is-8, the welding pressure is 30, the butt joint gap is 0.3os, the butt joint gap is 0.3ds, and the wire filling speed is 0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911389927.8A CN111014952A (en) | 2019-12-30 | 2019-12-30 | Welding method of cold-rolled 25# steel solid laser welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911389927.8A CN111014952A (en) | 2019-12-30 | 2019-12-30 | Welding method of cold-rolled 25# steel solid laser welding machine |
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| Publication Number | Publication Date |
|---|---|
| CN111014952A true CN111014952A (en) | 2020-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911389927.8A Pending CN111014952A (en) | 2019-12-30 | 2019-12-30 | Welding method of cold-rolled 25# steel solid laser welding machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112846512A (en) * | 2021-02-01 | 2021-05-28 | 新疆八一钢铁股份有限公司 | Wire feeding steady-state welding method for solid-state laser welding machine in high-latitude area |
Citations (8)
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| US6576863B1 (en) * | 2001-05-04 | 2003-06-10 | Regents Of The University Of California | Laser welding of fused quartz |
| ZA200401604B (en) * | 2003-02-28 | 2004-08-31 | Daimler Chrysler Ag | Method for laser welding with pre- and/or after-heating in the area of the welded seam. |
| CN105057887A (en) * | 2015-08-17 | 2015-11-18 | 华南师范大学 | Pulse laser welding method and device assisted by electromagnetic force |
| CN105364430A (en) * | 2015-12-24 | 2016-03-02 | 哈尔滨工业大学 | Laser welding method capable of realizing synchronous rolling of edge joints of sheets |
| CN109352180A (en) * | 2018-12-06 | 2019-02-19 | 哈尔滨工业大学 | A kind of compound sealing method of edge joint laser-electric arc of internal pressurization |
| CN109834389A (en) * | 2019-03-18 | 2019-06-04 | 华中科技大学 | A kind of multi-functional welding equipment and welding method for continuous rolling |
| CN110091067A (en) * | 2019-06-06 | 2019-08-06 | 上海工程技术大学 | A kind of laser and K-TIG complex welding method for welding cut deal |
| EP3533558A1 (en) * | 2016-10-27 | 2019-09-04 | Baoshan Iron & Steel Co., Ltd. | Steel welding component with aluminum or aluminum alloy coating, and preparation method therefor |
-
2019
- 2019-12-30 CN CN201911389927.8A patent/CN111014952A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6576863B1 (en) * | 2001-05-04 | 2003-06-10 | Regents Of The University Of California | Laser welding of fused quartz |
| ZA200401604B (en) * | 2003-02-28 | 2004-08-31 | Daimler Chrysler Ag | Method for laser welding with pre- and/or after-heating in the area of the welded seam. |
| CN105057887A (en) * | 2015-08-17 | 2015-11-18 | 华南师范大学 | Pulse laser welding method and device assisted by electromagnetic force |
| CN105364430A (en) * | 2015-12-24 | 2016-03-02 | 哈尔滨工业大学 | Laser welding method capable of realizing synchronous rolling of edge joints of sheets |
| EP3533558A1 (en) * | 2016-10-27 | 2019-09-04 | Baoshan Iron & Steel Co., Ltd. | Steel welding component with aluminum or aluminum alloy coating, and preparation method therefor |
| CN109352180A (en) * | 2018-12-06 | 2019-02-19 | 哈尔滨工业大学 | A kind of compound sealing method of edge joint laser-electric arc of internal pressurization |
| CN109834389A (en) * | 2019-03-18 | 2019-06-04 | 华中科技大学 | A kind of multi-functional welding equipment and welding method for continuous rolling |
| CN110091067A (en) * | 2019-06-06 | 2019-08-06 | 上海工程技术大学 | A kind of laser and K-TIG complex welding method for welding cut deal |
Non-Patent Citations (1)
| Title |
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| 张柯柯: "《特种先进连接方法》", 31 August 2016, 哈尔滨工业大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112846512A (en) * | 2021-02-01 | 2021-05-28 | 新疆八一钢铁股份有限公司 | Wire feeding steady-state welding method for solid-state laser welding machine in high-latitude area |
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Application publication date: 20200417 |