CN111331254A - Welding method and application of multilayer dissimilar metal structure - Google Patents
Welding method and application of multilayer dissimilar metal structure Download PDFInfo
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- CN111331254A CN111331254A CN202010176616.XA CN202010176616A CN111331254A CN 111331254 A CN111331254 A CN 111331254A CN 202010176616 A CN202010176616 A CN 202010176616A CN 111331254 A CN111331254 A CN 111331254A
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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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/32—Bonding taking account of the properties of the material involved
- B23K26/323—Bonding taking account of the properties of the material involved involving parts made of dissimilar metallic material
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Abstract
The invention discloses a welding method and application of a multilayer dissimilar metal structure. The multilayer dissimilar metal structure is formed by dissimilar metals which are sequentially overlapped from top to bottom; the multilayer dissimilar metal structure is greater than or equal to two layers; the boiling points of the upper layer metal of the two adjacent layers are greater than that of the lower layer metal; the melting point of the upper layer metal of the two adjacent layers is greater than or equal to that of the lower layer metal; the boiling point of the lowest layer metal is greater than the melting point of the uppermost layer metal. The invention realizes the welding of dissimilar metals, is the welding of ultrathin metals (0.1-0.4mm), has the mechanical property of welding seams meeting the use requirements, and can greatly save the problem of cost increase caused by the connection of the ultrathin dissimilar metals in the production and manufacturing process in the future, thereby reducing the production and manufacturing cost of enterprises and showing the product competitiveness.
Description
Technical Field
The invention belongs to the field of metal welding, and particularly relates to a welding method and application of a multilayer dissimilar metal structure.
Background
Welding, also known as fusion, welding, is a manufacturing process and technique for joining metals or other thermoplastic materials, such as plastics, in a heated, high temperature or high pressure manner.
The energy sources for modern welding are many, including gas flame, electric arc, laser, electron beam, friction, and ultrasonic, among others. In addition to use in a factory, welding can be performed in a variety of environments, such as the field, underwater, and space.
Laser welding is an efficient precision welding method using a laser beam with high energy density as a heat source. Laser welding is one of the important aspects of the application of laser material processing techniques. The 20 th century and the 70 th century are mainly used for welding thin-wall materials and low-speed welding, and the welding process belongs to a heat conduction type, namely, the surface of a workpiece is heated by laser radiation, and the surface heat is diffused inwards through heat conduction. Due to the unique advantages, the welding method is successfully applied to the precise welding of micro and small parts.
In the production and manufacturing process of the module, the process difficulty of welding different types of thin metal materials together is often encountered, the welding field of dissimilar metals belongs to the high-precision manufacturing process difficulty, and however, in the prior art, a simple welding method for a multilayer dissimilar metal structure with a specific melting point is lacked.
Disclosure of Invention
The invention aims to solve the problems and provides a welding method and application of a multilayer dissimilar metal structure.
In order to achieve the above object, a first aspect of the present invention provides a welding method of a multi-layered dissimilar metal structure,
the multilayer dissimilar metal structure is formed by dissimilar metals which are sequentially overlapped from top to bottom; the multilayer dissimilar metal structure is greater than or equal to two layers;
the boiling points of the upper layer metal of the two adjacent layers are greater than that of the lower layer metal;
the melting point of the upper layer metal of the two adjacent layers is greater than or equal to that of the lower layer metal;
the boiling point of the metal at the lowest layer is greater than the melting point of the metal at the uppermost layer;
the welding method comprises the following steps: injecting laser from the upper part of the multilayer dissimilar metal structure, and performing laser welding;
the laser welding speed is 160-220 mm/s;
the laser welding period is 0.4-0.6 s;
the amplitude of the laser welding is 0.6-0.8 mm;
the laser welding power is 825-1425W.
According to the invention, when the multilayer dissimilar metal structure is two layers, the multilayer dissimilar metal structure is composed of a first metal and a second metal which are sequentially overlapped from top to bottom;
the boiling point of the first metal is greater than the boiling point of the second metal and the melting point of the first metal is greater than or equal to the melting point of the second metal.
According to the invention, when the multilayer dissimilar metal structure is three layers, the multilayer dissimilar metal structure is composed of a first metal, a second metal and a third metal which are sequentially overlapped from top to bottom;
the boiling point of the first metal is more than that of the second metal and more than that of the third metal, and the melting point of the first metal is more than or equal to that of the second metal and more than or equal to that of the third metal.
According to a specific embodiment of the present invention, the first metal is aluminum, the second metal is copper, and the third metal is iron or 304 stainless steel;
the speed of the laser welding is 170-210 mm/s;
the laser welding period is 0.4-0.6 s;
the amplitude of the laser welding is 0.6-0.8 mm;
the laser welding power is 825-1125W.
According to the present invention, the aluminum may be aluminum 1015, and the copper may be copper T1 or copper T2.
According to another specific embodiment of the present invention, the first metal is copper, the second metal is nickel, and the third metal is tungsten;
the speed of the laser welding is 180-220 mm/s;
the laser welding period is 0.4-0.6 s;
the amplitude of the laser welding is 0.6-0.8 mm;
the laser welding power is 1125-1425W.
Preferably, the thickness of the metal layers other than the lowermost layer is 0.1 to 0.4 mm.
Preferably, the laser welding is performed by parallel welding and/or flight welding.
As a preferred scheme, after laser welding, the mechanical property of the multilayer ultrathin dissimilar metal structure is more than or equal to 15N/mm.
Preferably, the laser welding is performed by using a galvanometer laser machine.
The second aspect of the invention provides the application of the welding method in the field of lithium batteries.
The invention has the beneficial effects that:
the invention realizes the welding of dissimilar metals, is the welding of ultrathin metals (0.1-0.4mm), has the mechanical property of welding seams meeting the use requirements, and can greatly save the problem of cost increase caused by the connection of the ultrathin dissimilar metals in the production and manufacturing process in the future, thereby reducing the production and manufacturing cost of enterprises and showing the product competitiveness.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings.
Fig. 1 shows a schematic view of a multilayer dissimilar metal structure of example 1 of the present invention.
Description of reference numerals:
1-first metal, 2-second metal, 3-third metal.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Example 1
Fig. 1 shows a schematic view of a multilayer dissimilar metal structure of example 1 of the present invention.
The multilayer dissimilar metal structure is formed by sequentially stacking a first metal 1 (with the thickness of 0.3mm), a second metal 2 (with the thickness of 0.3mm) and a third metal 3 (with the thickness of 2mm) from top to bottom; the first metal 1 is aluminum, the second metal 2 is copper, and the third metal 3 is 304 stainless steel;
the welding method comprises the following steps: injecting laser from the upper part of the multilayer dissimilar metal structure by adopting a galvanometer laser machine, and carrying out laser welding in a flight welding mode; wherein the speed of laser welding is 170-210 mm/s; the laser welding period is 0.4-0.6 s; the amplitude of laser welding is 0.6-0.8 mm; the laser welding power was 825-1125W. After laser welding, the mechanical property of the multilayer ultrathin dissimilar metal structure is more than or equal to 15N/mm.
Example 2
The multilayer dissimilar metal structure is formed by sequentially overlapping copper T1 (with the thickness of 0.3mm), nickel (with the thickness of 0.3mm) and tungsten (with the thickness of 2mm) from top to bottom; the welding method comprises the following steps: injecting laser from the upper part of the multilayer dissimilar metal structure by adopting a galvanometer laser machine, and performing laser welding in a parallel welding mode; wherein the speed of laser welding is 180-220 mm/s; the laser welding period is 0.4-0.6 s; the amplitude of laser welding is 0.6-0.8 mm; the laser welding power is 1125-1425W. After laser welding, the mechanical property of the multilayer ultrathin dissimilar metal structure is more than or equal to 15N/mm.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. A welding method of a multilayer dissimilar metal structure is characterized in that:
the multilayer dissimilar metal structure is formed by dissimilar metals which are sequentially overlapped from top to bottom; the multilayer dissimilar metal structure is greater than or equal to two layers;
the boiling points of the upper layer metal of the two adjacent layers are greater than that of the lower layer metal;
the melting point of the upper layer metal of the two adjacent layers is greater than or equal to that of the lower layer metal;
the boiling point of the metal at the lowest layer is greater than the melting point of the metal at the uppermost layer;
the welding method comprises the following steps: injecting laser from the upper part of the multilayer dissimilar metal structure, and performing laser welding;
the laser welding speed is 160-220 mm/s;
the laser welding period is 0.4-0.6 s;
the amplitude of the laser welding is 0.6-0.8 mm;
the laser welding power is 825-1425W.
2. The welding method according to claim 1, wherein the multi-layered dissimilar metal structure is composed of a first metal, a second metal, which are stacked in this order from top to bottom;
the boiling point of the first metal is greater than the boiling point of the second metal and the melting point of the first metal is greater than or equal to the melting point of the second metal.
3. The welding method according to claim 1, wherein the multi-layered dissimilar metal structure is composed of a first metal, a second metal, and a third metal which are stacked in this order from top to bottom;
the boiling point of the first metal is more than that of the second metal and more than that of the third metal, and the melting point of the first metal is more than or equal to that of the second metal and more than or equal to that of the third metal.
4. The welding method according to claim 3,
the first metal is aluminum, the second metal is copper, and the third metal is iron or 304 stainless steel;
the speed of the laser welding is 170-210 mm/s;
the laser welding period is 0.4-0.6 s;
the amplitude of the laser welding is 0.6-0.8 mm;
the laser welding power is 825-1125W.
5. The welding method according to claim 3,
the first metal is copper, the second metal is nickel, and the third metal is tungsten;
the speed of the laser welding is 180-220 mm/s;
the laser welding period is 0.4-0.6 s;
the amplitude of the laser welding is 0.6-0.8 mm;
the laser welding power is 1125-1425W.
6. The welding method according to any one of claims 1 to 5,
the thickness of the other metal layers except the lowest layer is 0.1-0.4 mm.
7. Welding method according to any one of claims 1-5, wherein the laser welding is performed as a parallel welding and/or as a flight welding.
8. The welding method according to any one of claims 1 to 5, wherein the mechanical properties of the multilayered ultrathin dissimilar metal structure after laser welding are not less than 15N/mm.
9. The welding method according to any one of claims 1 to 5, wherein the laser welding is performed using a galvanometer laser machine.
10. Use of the welding method according to any one of claims 1-9 in the field of lithium batteries.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010176616.XA CN111331254A (en) | 2020-03-13 | 2020-03-13 | Welding method and application of multilayer dissimilar metal structure |
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| CN202010176616.XA CN111331254A (en) | 2020-03-13 | 2020-03-13 | Welding method and application of multilayer dissimilar metal structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115070203A (en) * | 2022-02-15 | 2022-09-20 | 道克特斯(天津)新能源科技有限公司 | Welding method for battery core and shell of lithium ion battery and welding oxygen-free protection |
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| JP2010075967A (en) * | 2008-09-26 | 2010-04-08 | Nec Personal Products Co Ltd | Method for welding different kind of metal |
| CN106271069A (en) * | 2016-08-31 | 2017-01-04 | 武汉华工激光工程有限责任公司 | A kind of rustless steel and the method for laser welding of aluminium alloy |
| CN108565388A (en) * | 2018-04-17 | 2018-09-21 | 江苏九蓝新能源科技有限公司 | A kind of nickel-clad copper turns aluminium pole ears and its welding method |
| CN110253146A (en) * | 2019-07-03 | 2019-09-20 | 湖南科技大学 | A kind of high-strength copper Al dissimilar materials double helix welding procedure |
| CN110340521A (en) * | 2019-07-19 | 2019-10-18 | 中国第一汽车股份有限公司 | A kind of method for laser welding of copper and mickel |
| JP2020011276A (en) * | 2018-07-20 | 2020-01-23 | 株式会社神戸製鋼所 | Dissimilar material joint structure manufacturing method and dissimilar material joint structure |
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2020
- 2020-03-13 CN CN202010176616.XA patent/CN111331254A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010075967A (en) * | 2008-09-26 | 2010-04-08 | Nec Personal Products Co Ltd | Method for welding different kind of metal |
| CN106271069A (en) * | 2016-08-31 | 2017-01-04 | 武汉华工激光工程有限责任公司 | A kind of rustless steel and the method for laser welding of aluminium alloy |
| CN108565388A (en) * | 2018-04-17 | 2018-09-21 | 江苏九蓝新能源科技有限公司 | A kind of nickel-clad copper turns aluminium pole ears and its welding method |
| JP2020011276A (en) * | 2018-07-20 | 2020-01-23 | 株式会社神戸製鋼所 | Dissimilar material joint structure manufacturing method and dissimilar material joint structure |
| CN110253146A (en) * | 2019-07-03 | 2019-09-20 | 湖南科技大学 | A kind of high-strength copper Al dissimilar materials double helix welding procedure |
| CN110340521A (en) * | 2019-07-19 | 2019-10-18 | 中国第一汽车股份有限公司 | A kind of method for laser welding of copper and mickel |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115070203A (en) * | 2022-02-15 | 2022-09-20 | 道克特斯(天津)新能源科技有限公司 | Welding method for battery core and shell of lithium ion battery and welding oxygen-free protection |
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Application publication date: 20200626 |