CN108672929A - A kind of method for laser welding of super high strength armour steel - Google Patents
A kind of method for laser welding of super high strength armour steel Download PDFInfo
- Publication number
- CN108672929A CN108672929A CN201810778729.XA CN201810778729A CN108672929A CN 108672929 A CN108672929 A CN 108672929A CN 201810778729 A CN201810778729 A CN 201810778729A CN 108672929 A CN108672929 A CN 108672929A
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- China
- Prior art keywords
- welding
- welded
- high strength
- super high
- laser welding
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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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/60—Preliminary treatment
-
- 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
- B23K26/12—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure
- B23K26/123—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure in an atmosphere of particular gases
-
- 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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The present invention relates to a kind of method for laser welding of super high strength armour steel, are as follows：The first step, welding preparation；Second step, it would be desirable to which two welded parts of welding are mounted on frock clamp；Third walks, the weld seam welding to two welded parts, and wherein welding parameter is：2500~2700W of laser power, welding speed V=600mm/min, straight argon gas shielded；Joint environment temperature is not less than 15 DEG C, keeps 50~100 DEG C of weld preheating temperature, the wind speed of welding section should be limited in 1m/s hereinafter, abat-vent otherwise should be taken.The present invention reduces connector cooling velocity, reduces connector brittleness, improves plasticity and toughness, avoids cold cracking, ensures that connector meets the requirement of vehicle usability.
Description
Technical field
The invention belongs to armour steel welding technology fields, and in particular to a kind of method for laser welding of super high strength armour steel,
Suitable for reducing superhigh intensity, the brittle method for laser welding of high rigidity armour steel connector.
Background technology
The superelevation that armored vehicle industry in China's uses at present by force 616,601,6211,685 equal thickness of thin armour steel in 3-
9mm, tensile strength are studying the high energy of high-strength steel both at home and abroad in 1500MPa or more to improve vehicle postwelding welding efficiency
Beam laser welding process.Thin armour steel welds generally use routine electric arc welding to existing superelevation by force, and postwelding easily generates change
Shape and crackle such as use high energy beam Laser Welding welding procedure, and since welding energy is big, cooling velocity is high, postwelding connector hardens
Tendency will be more significant, and is welded using the normal welding parameter of general steel plate, cold cracking will be generated in use, is the difficulty in applying
Point.Although having excessive quantifier elimination to high-strength steel laser weldering both at home and abroad, many achievements are also achieved, are all for common
The work and application that the materials of hardness and strength is carried out, and most apply is only requiring that intensity do not require the product of plasticity and toughness to weld
It connects, and related high-carbon content, high-alloying, the high intensity of big welding capacity, the laser welding of high rigidity armour steel do not take still
Obtain the achievement of applicability.
It is domestic to study at present and the armour steel of application has a preferable obdurability, but due to its carbon equivalent be up to 0.90 with
On, weldability is poor, using common method for laser welding since speed of welding is fast, weld seam will be caused to harden under rapid cooling,
Cold cracking is generated, and influences connector performance.Usual high intensity, high rigidity armour steel are the materials of unusable laser welding
Material.
Invention content
The object of the present invention is to provide a kind of method for laser welding of super high strength armour steel, are suitable for high intensity, high rigidity
Armour steel welds, and in the case where ensureing to penetrate, reduces connector cooling velocity, reduces connector brittleness, improves plasticity and toughness, avoid
Cold cracking ensures that connector meets the requirement of vehicle usability.
The technical scheme is that a kind of method for laser welding of super high strength armour steel is as follows：
The first step, welding preparation ensure that the portion faces to be welded of two welded parts are bright and clean, smooth, while removing fire and cutting
The quench-hardened case of generation；
Second step, it would be desirable to which two welded parts of welding are mounted on frock clamp；Shape after two welded part docking
At I type grooves, butt-joint clearance and upper and lower misalignment distance are to press from both sides two welded parts no more than 0.5mm, and by frock clamp
It fastens.
Third walks, the weld seam welding to two welded parts, and wherein welding parameter is：2500~2700W of laser power, weldering
Connect speed V=600mm/min, straight argon gas shielded；Joint environment temperature is not less than 15 DEG C, keep weld preheating temperature 50~
100 DEG C, the wind speed of welding section should be limited in 1m/s hereinafter, abat-vent otherwise should be taken.When the thickness of welded part is more than 6mm
When, welded part should carry out whole or local preheating.
The invention has the advantages that the present invention by the optimization to welding condition and process conditions suitable for high-strength dress
The thermal weld stress range of first steel, strictly controls thermal weld stress and cooling velocity, has not only ensured to penetrate, but also overcomes weld seam pole
Cold quenching is hard, reduces hardened structure, and welding point plasticity and toughness have reached the requirement of armored vehicle welding quality, and qualification rate is high, weld seam
Beauty solves high intensity, the Laser Welding solderability of high rigidity armour steel；The present invention is in the case where ensureing to penetrate, optimization
With laser power and speed of welding, i.e., by controlling thermal weld stress, connector cooling velocity is reduced, connector brittleness is reduced, is improved
Plasticity and toughness avoid cold cracking, ensure that connector meets the requirement of vehicle usability.
Specific implementation mode
A kind of method for laser welding of super high strength armour steel of the present invention is as follows：
The first step, welding preparation are processed the position to be welded of two welded parts using mechanical processing, make portion to be welded
Position any surface finish, smooth, two welded part butt-joint clearances requirements of guarantee, while removing the quench-hardened case that fire cuts generation；
Second step, it would be desirable to two welded parts (high rigidity armor) of welding, docking are placed on jig,
And I type grooves are formed after the docking of two welded parts, butt-joint clearance and upper and lower misalignment distance pass through work for no more than 0.5mm
Two two welded parts (high rigidity armor) are fixedly clamped by clamps, ensure that weld seam does not become in welding process
Shape；
Third walks, and using disc-type laser generator to weld seam welding, wherein welding parameter is：Laser power 2500~
2700W, welding speed V=600mm/min, straight argon gas shielded；Joint environment temperature is not less than 15 DEG C, the thickness of two welded parts
When degree is less than or equal to 5mm, welded part is not required to preheat, and when the thickness of welded part is more than 6mm, welded part should carry out entirely
Portion or local preheating keep 50~100 DEG C of weld preheating temperature, and the wind speed of welding section should be limited in 1m/s hereinafter, otherwise answering
Take abat-vent.
With reference to embodiment, the invention will be further described.
Embodiment, by taking welded part is F601 high rigidity armour steels as an example, wherein thickness is 6mm, I type grooves, quilt before welding
Weldment preheats 70 DEG C, laser power 2500W, speed of welding：V=600mm/min, postwelding welding point inside and outside matter after testing
Amount reaches " armored vehicle welding manufacture inspection specifications " requirement, and molding toughness is good, without the welding for exceeding quality requirement
Defect meets product requirement.
Claims (3)
1. a kind of method for laser welding of super high strength armour steel, it is characterized in that：The method for laser welding is as follows：
The first step, welding preparation ensure that the portion faces to be welded of two welded parts are bright and clean, smooth, while removing fire and cutting generation
Quench-hardened case；
Second step, it would be desirable to which two welded parts of welding are mounted on frock clamp；
Third walks, the weld seam welding to two welded parts, and wherein welding parameter is：2500~2700W of laser power, welding speed
Spend V=600mm/min, straight argon gas shielded；Joint environment temperature is not less than 15 DEG C, keeps 50~100 DEG C of weld preheating temperature,
The wind speed of welding section should be limited in 1m/s or less, otherwise should take abat-vent.
2. a kind of method for laser welding of super high strength armour steel described in accordance with the claim 1, it is characterised in that：Two in second step
I type grooves, butt-joint clearance and upper and lower misalignment distance are formed after a welded part docking to be pressed from both sides no more than 0.5mm, and by tooling
Two welded parts are fixedly clamped by tool.
3. a kind of method for laser welding of super high strength armour steel described in accordance with the claim 1, it is characterised in that：In third step,
When the thickness of welded part is more than 6mm, welded part should carry out whole or local preheating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810778729.XA CN108672929A (en) | 2018-07-16 | 2018-07-16 | A kind of method for laser welding of super high strength armour steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810778729.XA CN108672929A (en) | 2018-07-16 | 2018-07-16 | A kind of method for laser welding of super high strength armour steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108672929A true CN108672929A (en) | 2018-10-19 |
Family
ID=63814184
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810778729.XA Pending CN108672929A (en) | 2018-07-16 | 2018-07-16 | A kind of method for laser welding of super high strength armour steel |
Country Status (1)
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| CN (1) | CN108672929A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113399834A (en) * | 2021-06-24 | 2021-09-17 | 北京科技大学 | Preparation method of high-strength steel plate laser welding joint for 1000MPa and above automobiles |
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|---|---|---|---|---|
| CN101284334B (en) * | 2008-06-06 | 2011-04-06 | 贵州大学 | Application of laser weld in ultra-high tensile steel welding and welding method |
| CN103252589A (en) * | 2012-02-21 | 2013-08-21 | 沈阳新松机器人自动化股份有限公司 | Laser-MAG (Metal-Active-Gas) compound welding method used for welding and splicing high-strength or ultrahigh-strength steel of thick plate |
| CN105414904A (en) * | 2015-12-31 | 2016-03-23 | 兰州金研激光再制造技术开发有限公司 | Welding method for low-alloy ultrahigh-strength steel |
| KR20160077382A (en) * | 2014-12-22 | 2016-07-04 | 재단법인 포항산업과학연구원 | Laser Welding Device and Welding Method of Thin Plate Using Laser Welding Device |
| CN105880834A (en) * | 2016-05-18 | 2016-08-24 | 太原科技大学 | Welding method of Q890 high-strength steel |
| CN106041305A (en) * | 2016-07-05 | 2016-10-26 | 北京科技大学 | Laser welding method of high silicon steel |
| CN107866634A (en) * | 2017-10-26 | 2018-04-03 | 无锡汉神电气股份有限公司 | A kind of austenitic stainless steel thin plate butt welding process |
| CN107900518A (en) * | 2017-11-23 | 2018-04-13 | 中南大学 | A kind of high-rate laser silk filling penetration fustion welding method of high strength dual phase steel thick plate |
-
2018
- 2018-07-16 CN CN201810778729.XA patent/CN108672929A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101284334B (en) * | 2008-06-06 | 2011-04-06 | 贵州大学 | Application of laser weld in ultra-high tensile steel welding and welding method |
| CN103252589A (en) * | 2012-02-21 | 2013-08-21 | 沈阳新松机器人自动化股份有限公司 | Laser-MAG (Metal-Active-Gas) compound welding method used for welding and splicing high-strength or ultrahigh-strength steel of thick plate |
| KR20160077382A (en) * | 2014-12-22 | 2016-07-04 | 재단법인 포항산업과학연구원 | Laser Welding Device and Welding Method of Thin Plate Using Laser Welding Device |
| CN105414904A (en) * | 2015-12-31 | 2016-03-23 | 兰州金研激光再制造技术开发有限公司 | Welding method for low-alloy ultrahigh-strength steel |
| CN105880834A (en) * | 2016-05-18 | 2016-08-24 | 太原科技大学 | Welding method of Q890 high-strength steel |
| CN106041305A (en) * | 2016-07-05 | 2016-10-26 | 北京科技大学 | Laser welding method of high silicon steel |
| CN107866634A (en) * | 2017-10-26 | 2018-04-03 | 无锡汉神电气股份有限公司 | A kind of austenitic stainless steel thin plate butt welding process |
| CN107900518A (en) * | 2017-11-23 | 2018-04-13 | 中南大学 | A kind of high-rate laser silk filling penetration fustion welding method of high strength dual phase steel thick plate |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113399834A (en) * | 2021-06-24 | 2021-09-17 | 北京科技大学 | Preparation method of high-strength steel plate laser welding joint for 1000MPa and above automobiles |
| CN113399834B (en) * | 2021-06-24 | 2022-04-29 | 北京科技大学 | Preparation method of high-strength steel plate laser welding joint for 1000MPa and above automobiles |
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Application publication date: 20181019 |