CN104759756A - Laser welding technology in which powder laser cladding is replaced with sheet lapping - Google Patents
Laser welding technology in which powder laser cladding is replaced with sheet lapping Download PDFInfo
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- CN104759756A CN104759756A CN201510209152.7A CN201510209152A CN104759756A CN 104759756 A CN104759756 A CN 104759756A CN 201510209152 A CN201510209152 A CN 201510209152A CN 104759756 A CN104759756 A CN 104759756A
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Abstract
The invention belongs to the laser welding technology, and relates to a laser welding technology in which powder laser cladding is replaced with sheet lapping. The laser welding technology comprises the following steps that firstly, two smooth and straight sheets are stacked up and down, the lower sheet serves as a base material in the welding technology, the upper sheet is a thin-plate-shaped cladding material, the lapping gap of the two sheets is smaller than 0.2 mm through a fixing lapping plate, and obvious protrusions and concaves do not exist; secondly, laser welding is carried out on the lapping plate through an optical fiber laser, the negative defocus ranges from -4mm to -3 mm is adopted, the pressure of protection gas is 0.1-0.15 mPa, and multi-time circulation welding is carried out on the sheets; thirdly, to guarantee the 30% coverage rate, the diameter of light spots ranges from 0.8 mm to 1.2 mm, next surfacing is carried out when a laser welding gun moves by 0.5-0.8 mm every time till the upper sheet is completely cladded on the lower sheet. The laser welding technology has the advantages that the problem that the sheet material serving as the laser cladding material cannot be cladded on the surface of metal easily is solved, and the sheet material replaces the powder to serve as the cladding material; a powder conveying system is removed, and equipment and operation procedures are simplified; the powder manufacturing process is not needed, and cost is lowered.
Description
Technical field
The present invention relates to a kind of laser welding process, particularly a kind of laser welding process replacing powder laser cladding with sheet lap.
Background technology
Laser melting and coating technique refers in different filler modes by preset coating material on cladding matrix surface, make it to melt with matrix surface skim through laser irradiation simultaneously, and it is extremely low and be the surface fused coating of metallurgical binding with matrix to form dilution rate after rapid solidification, thus significantly improve a kind of surface reinforcing method of the wear-resisting, anti-corrosion, heat-resisting, anti-oxidant of matrix surface and electrical characteristic etc.Laser melting coating can reach the object of surface modification or reparation, has both met the requirement to material surface particular characteristic, again saves a large amount of noble elements.
Laser melting and coating technique is process for modifying surface and an equipment repair technology with high-tech content, and laser cladding of material is the principal element of the development of restriction laser melting and coating technique and application.At present, the coating material of melting and coating process is all that employing is Powdered, and a series of shortcomings such as the cost of manufacture of powder is high, cycle length.
Summary of the invention
The object of the invention is to provide a kind of laser welding process replacing powder laser cladding with sheet lap, solve in laser melting coating and use powder as complex operation during cladding material and the higher problem of cost.
The object of the present invention is achieved like this: this laser melting and coating process, comprises the following steps:
A, two pieces of bright and clean straight thin plates superpose up and down, and lower plate is as the base material in welding procedure, and upper plate is laminal cladding material, and fixed plate makes the lap gap of two boards be less than 0.2mm, without obvious projection and depression;
B, use optical-fiber laser to carry out laser weld to lapping plate, adopt negative out of focus-3 ~-4mm, protective gas pressure 0.1 ~ 0.15mPa, thin plate is repeatedly circulated welding;
C, coverage rate in order to ensure 30%, spot diameter is 0.8-1.2mm, and each laser welding gun moves 0.5-0.8mm and carries out built-up welding next time, until the whole cladding of upper plate is in lower plate.
Described steps A uses light sheet material as cladding material, two block of material superposed in the mode simply overlapped.
Described step B is the technique by laser weld, adopts negative out of focus energy accumulating, repeatedly to circulate welding to thin plate.
Beneficial effect, owing to have employed such scheme, replaces powder to greatly reduce cost of manufacture with thin plate, the fabrication cycle of sheet material is also shorter than powder many, meanwhile, do not need powder feed system to provide cost savings and reduce during cladding is produced the powder feeding operation that will consider yet, effectively improve production efficiency.With optical fiber laser by light sheet material cladding to metal surface, metal surface is made to be provided with the good characteristic of light sheet material, light sheet material and corrupt split good, surface topography after cladding is smooth, light sheet material is successfully used to replace powder as cladding material cladding on metal surface, while successfully by light sheet material cladding to metal surface, solve in laser melting coating and use powder as complex operation during cladding material and the higher problem of cost, reach object of the present invention.
Advantage: when using light sheet material as cladding material, equipment is simple, does not need powder feed system, thus decreases the step of powder process, reduce cost.
(1) solve light sheet material and be difficult to the problem of cladding in metal surface as laser cladding of material, instead of powder as cladding material.
(2) cancel powder feed system, simplify and melt coating equipment and operating process.
(3) do not need pulverizing process, reduce cost.
Detailed description of the invention
Embodiment 1: this laser melting and coating process, comprises the following steps:
A, one piece of thickness are that the bright and clean straight corrosion resistant plate that bright and clean straight corrosion resistant plate and one piece of thickness of 1.5mm is 3.5mm superposes up and down, the corrosion resistant plate of 3.5mm is as the base material in welding procedure, the corrosion resistant plate of 1.5mm is as cladding material, fixed plate makes the lap gap of two boards be less than 0.2mm, without obvious projection and depression;
B, use optical-fiber laser to carry out laser weld to lapping plate, adopt negative out of focus laser power to be 400W, speed is 1.4m/min, and defocusing amount is-3mm, protective gas pressure 0.15MPa, repeatedly to circulate welding to thin plate.
C, coverage rate in order to ensure 30%, spot diameter is 1mm, and each laser welding gun moves 0.7mm and carries out built-up welding next time.Until the whole cladding of upper plate is in lower plate.
Described steps A uses light sheet material as cladding material, two block of material superposed in the mode simply overlapped.
Described step B is the technique by laser weld, adopts negative out of focus energy accumulating, repeatedly to circulate welding to thin plate.
Embodiment 2:
A, one piece of thickness are that the bright and clean straight aluminium sheet that bright and clean straight aluminium sheet and a lumpiness of 0.9mm is 3.5mm superposes up and down, the aluminium sheet of 3.5mm is as the base material in welding procedure, the aluminium sheet of 0.9mm is cladding material, fixed plate makes the lap gap of two boards be less than 0.2mm, without obvious projection and depression;
B, use optical-fiber laser to carry out laser weld to lapping plate, laser power is 400W, and speed is 1.4m/min, adopts negative out of focus-4mm, protective gas pressure 0.1MPa, repeatedly to circulate welding to thin plate.
C, coverage rate in order to ensure 30%, spot diameter is 1.2mm, and each laser welding gun moves 0.8mm and carries out built-up welding next time.Until the whole cladding of upper plate is in lower plate.
Above-described embodiment is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And these belong to spirit institute's apparent change of amplifying out of the present invention or change and are still among protection scope of the present invention.
Claims (3)
1. replace a laser welding process for powder laser cladding with sheet lap, it is characterized in that: this laser melting and coating process, comprises the following steps:
A, two pieces of bright and clean straight thin plates superpose up and down, and lower plate is as the base material in welding procedure, and upper plate is laminal cladding material, and fixed plate makes the lap gap of two boards be less than 0.2mm, without obvious projection and depression;
B, use optical-fiber laser to carry out laser weld to lapping plate, adopt negative out of focus-3 ~-4mm, protective gas pressure 0.1 ~ 0.15mPa, thin plate is repeatedly circulated welding;
C, coverage rate in order to ensure 30%, spot diameter is 0.8-1.2mm, and each laser welding gun moves 0.5-0.8mm and carries out built-up welding next time, until the whole cladding of upper plate is in lower plate.
2. a kind of laser welding process replacing powder laser cladding with sheet lap according to claim 1, is characterized in that: described steps A uses light sheet material as cladding material, two block of material superposed in the mode simply overlapped.
3. a kind of laser welding process replacing powder laser cladding with sheet lap according to claim 1, is characterized in that: described step B is the technique by laser weld, adopts negative out of focus energy accumulating, repeatedly to circulate welding to thin plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510209152.7A CN104759756B (en) | 2015-04-28 | 2015-04-28 | Laser cladding technology in which powder laser cladding is replaced with sheet lapping |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510209152.7A CN104759756B (en) | 2015-04-28 | 2015-04-28 | Laser cladding technology in which powder laser cladding is replaced with sheet lapping |
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| CN104759756A true CN104759756A (en) | 2015-07-08 |
| CN104759756B CN104759756B (en) | 2017-05-10 |
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| CN201510209152.7A Active CN104759756B (en) | 2015-04-28 | 2015-04-28 | Laser cladding technology in which powder laser cladding is replaced with sheet lapping |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105149789A (en) * | 2015-10-28 | 2015-12-16 | 无锡汉神电气有限公司 | Angle joint laser welding technology for 0.5 mm galvanized plate |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1457835A (en) * | 1974-01-07 | 1976-12-08 | Avco Everett Res Lab Inc | Formation of surface layer casings on articles |
| US5730817A (en) * | 1996-04-22 | 1998-03-24 | Helisys, Inc. | Laminated object manufacturing system |
| CN101037755A (en) * | 2007-04-20 | 2007-09-19 | 上海工程技术大学 | Rare earth appended surfacing alloy and surfacing technique for preparation of aluminium matrix composite material |
| CN101245459A (en) * | 2007-02-12 | 2008-08-20 | 杜建伟 | Method for coating on high heat conduction metallic face of such as copper and aluminum |
| CN101480753A (en) * | 2009-01-14 | 2009-07-15 | 深圳大学 | Rapid shaping method for manufacturing metal laminated solid mass |
| CN103334104A (en) * | 2013-07-10 | 2013-10-02 | 中国科学院半导体研究所 | Laser cladding method for obtaining low-dilution-rate coat |
-
2015
- 2015-04-28 CN CN201510209152.7A patent/CN104759756B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1457835A (en) * | 1974-01-07 | 1976-12-08 | Avco Everett Res Lab Inc | Formation of surface layer casings on articles |
| US5730817A (en) * | 1996-04-22 | 1998-03-24 | Helisys, Inc. | Laminated object manufacturing system |
| CN101245459A (en) * | 2007-02-12 | 2008-08-20 | 杜建伟 | Method for coating on high heat conduction metallic face of such as copper and aluminum |
| CN101037755A (en) * | 2007-04-20 | 2007-09-19 | 上海工程技术大学 | Rare earth appended surfacing alloy and surfacing technique for preparation of aluminium matrix composite material |
| CN101480753A (en) * | 2009-01-14 | 2009-07-15 | 深圳大学 | Rapid shaping method for manufacturing metal laminated solid mass |
| CN103334104A (en) * | 2013-07-10 | 2013-10-02 | 中国科学院半导体研究所 | Laser cladding method for obtaining low-dilution-rate coat |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105149789A (en) * | 2015-10-28 | 2015-12-16 | 无锡汉神电气有限公司 | Angle joint laser welding technology for 0.5 mm galvanized plate |
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| CN104759756B (en) | 2017-05-10 |
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Address after: 221116 Research Institute of China University of Mining and Technology,, Jiangsu Applicant after: China University of Mining & Technology Address before: 221116 Research Institute, China University of Mining and Technology, Xuzhou University, Jiangsu, China, Applicant before: China University of Mining & Technology |
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