CN1166487C - Process for improving mechanical performance of laser welded seam on silicon steel sheet - Google Patents
Process for improving mechanical performance of laser welded seam on silicon steel sheet Download PDFInfo
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- CN1166487C CN1166487C CNB011283653A CN01128365A CN1166487C CN 1166487 C CN1166487 C CN 1166487C CN B011283653 A CNB011283653 A CN B011283653A CN 01128365 A CN01128365 A CN 01128365A CN 1166487 C CN1166487 C CN 1166487C
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- silicon steel
- steel sheet
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- welded seam
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Abstract
The present invention relates to a technical method for improving mechanical performance of laser welding seam on silicon steel sheets. In the method, the silicon steel sheets are jointed closely, and then the seam is welded by the method of laser welding. The present invention is characterized in that when the welding is finished, the laser welding seam is carried out normalizing treatment, namely heat treatment, with laser beams. With the adoption of the method provided by the present invention, the mechanical performance of laser welding seam on the silicon steel sheets, particularly bending strength can be greatly improved.
Description
Technical field
The present invention relates to a kind of process of improving mechanical performance of laser welded seam on silicon steel sheet.
Background technology
Laser welding technology is widely used in the industrial production.Because the Laser Welding Quality height, contactless, depth-to-width ratio is big, be out of shape for a short time, weld attractive in appearancely, and the mechanical performance of weld seam is substantially consistent with mother metal, so is suitable for the especially welding of iron and steel sheet and plate of many fields.But for silicon steel sheet, because material silicon content (being generally 1-3%) is higher, the plasticity and the toughness of material are relatively poor, the silicon steel of the high trade mark particularly, and its carbon containing and silicon content are than higher, and the solderability of material is poorer.This material is carried out laser weld, and weld seam fragility is big, and produces bigger weld stress, causes the mechanical performance of weld seam to compare a certain distance with mother metal, and particularly flexural strength significantly descends.This just is difficult to satisfy the online production that silicon steel sheet needs alternating bending to move on the field, particularly streamline that has higher requirements for the silicon steel sheet weld seam mechanical performance after the welding.
Summary of the invention
Problem to be solved by this invention is: a kind of process of improving mechanical performance of laser welded seam on silicon steel sheet is provided, can improves mechanical performance of laser welded seam on silicon steel sheet with this method, especially improve the bending strength of laser welded seam.
Technical scheme of the present invention is: a kind of process of improving mechanical performance of laser welded seam on silicon steel sheet, behind the silicon steel sheet joint close, with laser welding method commissure is welded, its special character is, after having welded, with laser beam the laser welded seam place being carried out normalized treatment is heat treatment.
When carrying out above-mentioned normalized treatment, the defocusing amount of laser beam is the 15-30 millimeter, and normalizing speed is per minute 0.5-0.8 rice, and normalizing power is the 60-100% of bonding power.
The present invention can weld the instant parameters of laser beam that changes in back to the silicon steel sheet joint close at laser beam, in the backhaul of laser head, shines with the laser beam butt welded seam and to finish normalized treatment.
Facts have proved, adopt method provided by the invention, can improve mechanical performance, the especially bending strength of laser welded seam on silicon steel sheet greatly.
The specific embodiment
Embodiment 1: laser weld, and solid state laser, laser power 1Kw, 0.4 meter of speed of welding per minute, mother metal are the directional silicon steel of thickness of slab 2.2-2.3 millimeter, behind the silicon steel plate joint close, carry out laser weld under these conditions; After having welded, with laser beam the laser welded seam place being carried out normalized treatment is heat treatment, and when carrying out above-mentioned normalized treatment, the defocusing amount of laser beam (being the distance of the focus point of laser beam to weld seam) is 20 millimeters, normalizing speed is 0.8 meter of per minute, and normalizing power is 0.8Kw.
Result of the test: the laser weld directional silicon steel carries out alternating bending test and shows that postwelding is not made the straight weld of laser normalized treatment on the circumference of Φ 250mm, and cyclic bending is i.e. fracture once; Postwelding is through the laser normalized treatment, and 15 weld seams of straight weld cyclic bending do not rupture yet.
Embodiment 2: laser weld, and solid state laser, laser power 1Kw, 0.6 meter of speed of welding per minute, mother metal are the silicon steel plate of thickness of slab 2.2-2.3 millimeter, behind the silicon steel plate joint close, carry out laser weld under these conditions; After having welded, with laser beam the laser welded seam place being carried out normalized treatment is heat treatment, and when carrying out above-mentioned normalized treatment, the defocusing amount of laser beam is 30 millimeters, and normalizing speed is 0.6 meter of per minute, and normalizing power is 0.6Kw.
Result of the test: the laser weld silicon steel plate carries out alternating bending test and shows that postwelding is not made the straight weld of laser normalized treatment on the circumference of Φ 250mm, and cyclic bending is i.e. fracture once; Postwelding is through the laser normalized treatment, and 15 weld seams of straight weld cyclic bending do not rupture yet,
Embodiment 3: laser weld, and solid state laser, laser power 1Kw, 0.5 meter/minute of speed of welding, mother metal is the HiB high magnetic flux silicon steel plate of thickness of slab 2.2-2.3 millimeter, behind the silicon steel plate joint close, carries out laser weld under these conditions; After having welded, with laser beam the laser welded seam place being carried out normalized treatment is heat treatment, and when carrying out above-mentioned normalized treatment, the defocusing amount of laser beam is 15 millimeters, and normalizing speed is 0.5 meter of per minute, and normalizing power is 1Kw.
Result of the test: the laser weld silicon steel plate carries out alternating bending test and shows on the circumference of Φ 250mm, and 9 ° of inclined welds of laser normalized treatment are not made in welding, and back and forth 3-4 bending promptly ruptured; Postwelding is through the laser normalized treatment, and 20 weld seams of 9 ° of inclined weld cyclic bendings do not rupture yet.
Claims (2)
1. process of improving mechanical performance of laser welded seam on silicon steel sheet, behind the silicon steel sheet joint close, with laser welding method commissure is welded, it is characterized in that: laser beam has welded the instant parameters of laser beam that changes in back to the silicon steel sheet joint close, in the backhaul of laser head, shine with the laser beam butt welded seam and to finish normalized treatment.
2. process according to claim 1 is characterized in that: during normalized treatment, the defocusing amount of laser beam is the 20-30 millimeter, and normalizing speed is per minute 0.5-0.8 rice, and normalizing power is the 60-100% of bonding power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011283653A CN1166487C (en) | 2001-08-22 | 2001-08-22 | Process for improving mechanical performance of laser welded seam on silicon steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011283653A CN1166487C (en) | 2001-08-22 | 2001-08-22 | Process for improving mechanical performance of laser welded seam on silicon steel sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1334171A CN1334171A (en) | 2002-02-06 |
| CN1166487C true CN1166487C (en) | 2004-09-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011283653A Expired - Fee Related CN1166487C (en) | 2001-08-22 | 2001-08-22 | Process for improving mechanical performance of laser welded seam on silicon steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1166487C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008015795A1 (en) * | 2006-08-02 | 2008-02-07 | Kabushiki Kaisha Toshiba | Erosion preventive method and member with erosion preventive section |
| CN103286444B (en) * | 2012-02-22 | 2015-06-17 | 沈阳新松机器人自动化股份有限公司 | Laser butt welding method of silicon steel sheet |
| CN106041305B (en) * | 2016-07-05 | 2017-12-08 | 北京科技大学 | A kind of high silicon steel method for laser welding |
| CN106181042B (en) * | 2016-07-28 | 2017-11-28 | 东南大学 | A kind of ultra-large type sea frock is for low stress without surplus welding method and device |
| CN110936103A (en) * | 2018-09-21 | 2020-03-31 | 宝山钢铁股份有限公司 | Laser welding method and application of high-silicon steel hot rolled plate |
| CN110756991A (en) * | 2019-10-31 | 2020-02-07 | 中国电子科技集团公司第十一研究所 | Infrared detector Dewar welding method and infrared detector |
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2001
- 2001-08-22 CN CNB011283653A patent/CN1166487C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1334171A (en) | 2002-02-06 |
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