CN106238915A - A kind of laser assembly solder method of titanium microalloying carbon manganese steel - Google Patents
A kind of laser assembly solder method of titanium microalloying carbon manganese steel Download PDFInfo
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- CN106238915A CN106238915A CN201610726561.9A CN201610726561A CN106238915A CN 106238915 A CN106238915 A CN 106238915A CN 201610726561 A CN201610726561 A CN 201610726561A CN 106238915 A CN106238915 A CN 106238915A
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- Prior art keywords
- assembly solder
- laser assembly
- laser
- welding
- carbon manganese
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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
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/24—Seam welding
-
- 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
- B23K26/125—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 of mixed 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
- B23K26/32—Bonding taking account of the properties of the material involved
-
- 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
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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
This application discloses a kind of laser assembly solder method of titanium microalloying carbon manganese steel, use laser to weld in the protective gas of noble gas and oxygen mix or in atmosphere to the welding position of titanium microalloying carbon manganese steel plate.By have in the weld metal zone that this laser assembly solder method obtains fusing mother metal obtained by titanium elements; the oxygen element oxidation bonding that titanium elements is provided with the oxygen in protective gas or air obtains titanium-containing oxide; the size of the titanium-containing oxide formed can become the forming core point of acicular ferrite just; the final full penetration weld obtaining the line and staff control containing acicular ferrite and martensite, the obdurability of this weld seam is stronger than the pure martensitic structure welding seam toughness obtained in pure inert gas.And the protective gas of noble gas and oxygen mix or air are compared with pure inert gas, reduce the usage amount of noble gas, reduce welding cost, carry out laser welding in atmosphere, do not limited by welding surroundings.
Description
Technical field
The present invention relates to laser welding technology field, particularly to the laser assembly solder side of a kind of titanium microalloying carbon manganese steel
Method.
Background technology
A kind of typical high strength steel of micro alloyed steel, has been widely used for automobile, engineering machinery, bridge, high level are built
The field such as build.The steel of the type mainly utilize the refined crystalline strengthening of microalloy element Nb, V, Ti, Mo etc., precipitation strength, solid solution strong
The features such as change improve the intensity of steel.
Welding is one of major way of these steel connection.Laser assembly solder technology is as the welding skill of a kind of high-energy-density
Art, has that heat input is little, speed of welding is high, welding seam deep width ratio is big, welding quality is high, need not add the advantage such as welding wire, relatively pass
Welding method such as arc welding, the argon arc welding etc. of system have faster setting rate and shorter high-temperature residence time, for microalloy
The connection changing steel provides a kind of new approach.But, for existing laser assembly solder method, welding process must apply protect
Protect gas to ensure that weld zone is not oxidized, and then ensure the mechanical property of weld zone.Therefore, noble gas such as helium, argon and
Nitrogen is the first-selected protection gas in laser beam welding, and different types of protection gas is applicable to different steel.Additionally, pure lazy
Carrying out laser welding under property gas shield, the microscopic structure of weld metal zone easily forms single martensite and is mingled with tiny oxidation
Thing.
When laser assembly solder technology is applied to titanium microalloying carbon manganese steel, under pure inert gas is protected, carry out Laser Welding
Connecing, the microscopic structure of weld metal zone forms single martensite, and the obdurability causing weld metal zone is the highest.Meanwhile, pure inertia is used to protect
Protecting gas and carry out welding protection, increase welding cost, welding surroundings is restricted.
Summary of the invention
In view of this, it is an object of the invention to provide a kind of laser assembly solder method of titanium microalloying carbon manganese steel, with
Improve structure obdurability ground, weld metal zone simultaneously, reduce welding cost, reduce the restriction of welding surroundings.
For reaching above-mentioned purpose, the present invention provides techniques below scheme:
A kind of laser assembly solder method of titanium microalloying carbon manganese steel, uses laser in noble gas and the protection of oxygen mix
Weld in gas or in atmosphere to the welding position of titanium microalloying carbon manganese steel plate.
Preferably, in above-mentioned laser assembly solder method, the welding arrangement form of described titanium microalloying carbon manganese steel plate is
Keep flat docking.
Preferably, in above-mentioned laser assembly solder method, between two blocks of described titanium microalloying carbon manganese steel plates of docking
Weld width is less than the 10% of the thickness of described titanium microalloying carbon manganese steel plate.
Preferably, in above-mentioned laser assembly solder method, described noble gas is nitrogen, and described nitrogen is at described protection gas
In body, the ratio of shared volume is 75%～95%.
Preferably, in above-mentioned laser assembly solder method, the Ti content in described titanium microalloying carbon manganese steel plate is
0.02%～0.2%.
Preferably, in above-mentioned laser assembly solder method, the power of described laser is 4kw～8kw.
Preferably, in above-mentioned laser assembly solder method, the sweep speed of described laser is 1.2m/min～3m/min.
Preferably, in above-mentioned laser assembly solder method, the thickness of described titanium microalloying carbon manganese steel plate be 4mm～
10mm。
Preferably, in above-mentioned laser assembly solder method, before carrying out laser assembly solder, also include removing the micro-conjunction of described titanium
The surface oxide layer of aurification carbon manganese steel plate, and the greasy dirt on described titanium microalloying carbon manganese steel plate surface is cleaned with acetone.
Preferably, in above-mentioned laser assembly solder method, laser assembly solder is carried out by optical fiber laser.
Compared with prior art, the invention has the beneficial effects as follows:
In the laser assembly solder method of the titanium microalloying carbon manganese steel that the present invention provides, use laser at noble gas and oxygen
In the protective gas of mixing or in atmosphere the weld seam of titanium microalloying carbon manganese steel plate is welded.By this laser assembly solder
There is in the weld metal zone that method obtains the titanium elements obtained by fusing mother metal, titanium elements and the oxygen institute in protective gas or air
The oxygen element oxidation bonding provided obtains titanium-containing oxide, has extremely short high-temperature residence time due to laser welding and Asia is quick
Setting rate, therefore so that the size of the titanium-containing oxide of formation can become the forming core point of acicular ferrite just, finally obtains
Containing acicular ferrite and the full penetration weld of the line and staff control of martensite, the obdurability of this weld seam obtains than in pure inert gas
The pure martensitic structure welding seam toughness arrived is strong.And noble gas and the protective gas of oxygen mix or air and pure inert gas
Compare, reduce the usage amount of noble gas, reduce welding cost, carry out laser welding in atmosphere, not by welding surroundings
Restriction.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Inventive embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to according to
The accompanying drawing provided obtains other accompanying drawing.
The flow chart of the laser assembly solder method of a kind of titanium microalloying carbon manganese steel that Fig. 1 provides for the embodiment of the present invention.
Detailed description of the invention
The core of the present invention there is provided a kind of laser assembly solder method of titanium microalloying carbon manganese steel, improves weld metal zone
Structure obdurability, meanwhile, reduces welding cost, decreases the restriction of welding surroundings.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
Embodiments provide a kind of laser assembly solder method of titanium microalloying carbon manganese steel, use laser at indifferent gas
Weld in the protective gas of body and oxygen mix or in atmosphere to the welding position of titanium microalloying carbon manganese steel plate.Titanium
Microalloying carbon manganese steel plate contains titanium elements, and the content of titanium elements is preferably 0.02%～0.2%, hereinafter referred to as steel plate.
By have in the weld metal zone that this laser assembly solder method obtains fusing mother metal obtained by titanium elements, mother metal is titanium
Microalloying carbon manganese steel plate, the oxygen element oxidation bonding that titanium elements is provided with the oxygen in protective gas or air obtains titaniferous
Oxide, owing to laser welding has extremely short high-temperature residence time and Sub realizable fuzzy matrix speed, therefore so that the titaniferous of formation
The size of oxide can become the forming core point of acicular ferrite just, and final acquisition contains acicular ferrite and the mixing of martensite
The full penetration weld of tissue, the obdurability of this weld seam is stronger than the pure martensitic structure welding seam toughness obtained in pure inert gas.
And the protective gas that forms with oxygen mix of noble gas or air are compared with pure inert gas, reduce making of noble gas
Consumption, reduces welding cost, carries out laser welding in atmosphere, is not limited by welding surroundings, can implement welding in the wild.
In the present embodiment, the welding arrangement form of steel plate preferably keeps flat docking, and two block plates that will be adjacent keep flat
Rear docking, the clearance distance of joint is the width of weld seam.Keep flat docking layout can improve further and be welded to connect intensity.
Further, in the present embodiment, weld width is less than the 10% of steel plate thickness.Preferably, the thickness of steel plate is
4mm～10mm, less weld seam can be better achieved the melted connection of two block plates.
In the present embodiment, in the protective gas being made up of noble gas and oxygen mix, noble gas is preferably nitrogen
Gas, the volume ratio shared in protective gas of nitrogen is 75%～95%, correspondingly, the ratio shared by oxygen be 5%～
25%.By the ratio of oxygen in regulation protective gas to regulate and control quantity and the size of Titanium oxide particles in weld seam, thus control
The content of the acicular ferrite that system is formed, controls the obdurability of weld seam.Noble gas uses nitrogen, reduce further and is welded into
This.Certainly, noble gas can also be helium, argon etc..
In the present embodiment, the power of laser is 4kw～8kw, at high-power laser Flashmelt Plate Welding,
Realize the connection of two block plates.
Further, the sweep speed of laser is 1.2m/min～3m/min, to ensure fully to melt at Plate Welding, and
Can rapid solidification.
As it is shown in figure 1, in order to improve Laser Welding Quality further, in the present embodiment, laser assembly solder method is being carried out
During laser welding, further comprising the steps of, first remove surface of steel plate oxide layer, i.e. iron scale, folding acetone cleans steel plate table
The greasy dirt in face.Two block plates through purified treatment are placed on workbench, and make two block plates be in close contact, keep weld seam width
Degree is less than the 10% of steel plate thickness.
Preferably employ optical fiber laser and launch laser.It is, of course, also possible to use other laser welding apparatus.
Present embodiments provide a kind of concrete laser assembly solder method, comprise the following steps:
S101,600MPa level hot rolling titanium microalloying carbon manganese steel (Ti content is 0.02%) is cut into thickness is 4mm's
Steel plate, and with angular buffing machine, surface of steel plate iron scale is removed, greasy dirt and the impurity of surface of steel plate is then removed with acetone；
S102, steel plate is lain on soldering test platform, and with weld jig by Interal fixation, it is ensured that two block plates docking
The gap at place is 0.25mm；
S103, utilizing optical fiber laser that steel plate is carried out welding, spot diameter is 0.3mm, and speed of welding is 3.0m/min,
Laser power is 6kw, welds in protective gas or air, and the nitrogen in protective gas accounts for 80%, and oxygen accounts for 20%, no
Add welding wire welding.
It is excellent that postwelding observes weld seam macro morphology, without substantially splashing, and is full penetration weld.Tension failure position occurs in
Mother metal district.The ballistic work of weld seam is 30J (55mm × 10mm × 2.5mm), and the ballistic work of mother metal (55mm × 10mm × 2.5mm) is
20J.Weld seam interior tissue is observed and is shown, Microstructure of Weld Metal is made up of acicular ferrite and lath martensite, acicular ferrite
Content is about 25%.
Present embodiments provide the laser assembly solder method that the second is concrete, comprise the following steps:
S201,800MPa level hot rolling titanium microalloying carbon manganese steel (Ti content is 0.10%) is cut into thickness is 10mm's
Steel plate, and with angular buffing machine, surface of steel plate iron scale is removed, greasy dirt and the impurity of surface of steel plate is then removed with acetone；
S202, steel plate is lain on soldering test platform, and with weld jig, sample is fixed, it is ensured that two block plates docking
The gap at place is 0.3mm；
S203, utilizing optical fiber laser that bread board is carried out welding, spot diameter is 0.3mm, and Laser Welding Speed is
1.2m/min, laser power is 6kw, carries out laser welding in protective gas or air, and the nitrogen in protective gas accounts for 95%,
Oxygen accounts for 5%, without welding wire welding.
It is excellent that postwelding observes weld seam macro morphology, without substantially splashing, and is full penetration weld.Tension failure position occurs in
Mother metal district.The ballistic work of weld seam is 50J (55mm × 10mm × 5.0mm), and the ballistic work of mother metal (55mm × 10mm × 5.0mm) is
42J.Weld seam interior tissue is observed and is shown, Microstructure of Weld Metal is made up of acicular ferrite, lath martensite and a small amount of bainite,
Acicular ferrite content is about 5%.
Present embodiments provide the third concrete laser assembly solder method, comprise the following steps:
S301,800MPa level hot rolling titanium microalloying carbon manganese steel (Ti content is 0.20%) is cut into thickness is 7mm's
Steel plate, and with angular buffing machine, surface of steel plate iron scale is removed, greasy dirt and the impurity of surface of steel plate is then removed with acetone；
S302, steel plate is lain on soldering test platform, and with weld jig, sample is fixed, it is ensured that two block plates right
Gap, the place of connecing is 0.3mm；
S303, utilizing optical fiber laser that bread board is carried out welding, spot diameter is 0.3mm, and speed of welding is 2.4m/
Min, laser power is 6kw, carries out laser welding in protective gas or air, and the nitrogen in protective gas accounts for 85%, oxygen
Account for 15%, without welding wire welding.
It is excellent that postwelding observes weld seam macro morphology, without substantially splashing, and is full penetration weld.Tension failure position occurs in
Mother metal district.The ballistic work of weld seam is 60J (55mm × 10mm × 5.0mm), and the ballistic work of mother metal (55mm × 10mm × 5.0mm) is
50J.Weld seam interior tissue is observed and is shown, Microstructure of Weld Metal is made up of acicular ferrite and lath martensite, acicular ferrite
Content is about 18%.
In this specification, each embodiment uses the mode gone forward one by one to describe, and what each embodiment stressed is and other
The difference of embodiment, between each embodiment, identical similar portion sees mutually.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.
Multiple amendment to these embodiments will be apparent from for those skilled in the art, as defined herein
General Principle can realize without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein and features of novelty phase one
The widest scope caused.
Claims (10)
1. the laser assembly solder method of a titanium microalloying carbon manganese steel, it is characterised in that use laser at noble gas and oxygen
In the protective gas of mixing or in atmosphere the welding position of titanium microalloying carbon manganese steel plate is welded.
Laser assembly solder method the most according to claim 1, it is characterised in that the welding of described titanium microalloying carbon manganese steel plate
Arrangement form is for keeping flat docking.
Laser assembly solder method the most according to claim 1, it is characterised in that two blocks of described titanium microalloying carbon manganese of docking
Weld width between steel plate is less than the 10% of the thickness of described titanium microalloying carbon manganese steel plate.
Laser assembly solder method the most according to claim 1, it is characterised in that described noble gas is nitrogen, described nitrogen
In described protective gas, the ratio of shared volume is 75%～95%.
Laser assembly solder method the most according to claim 1, it is characterised in that the titanium in described titanium microalloying carbon manganese steel plate
Content is 0.02%～0.2%.
Laser assembly solder method the most according to claim 1, it is characterised in that the power of described laser is 4kw～8kw.
Laser assembly solder method the most according to claim 1, it is characterised in that the sweep speed of described laser is 1.2m/min
～3m/min.
Laser assembly solder method the most according to claim 1, it is characterised in that the thickness of described titanium microalloying carbon manganese steel plate
For 4mm～10mm.
Laser assembly solder method the most according to claim 1, it is characterised in that before carrying out laser assembly solder, also include
Except the surface oxide layer of described titanium microalloying carbon manganese steel plate, and clean described titanium microalloying carbon manganese steel plate surface with acetone
Greasy dirt.
Laser assembly solder method the most according to claim 1, it is characterised in that carry out laser assembly solder by optical fiber laser.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610726561.9A CN106238915A (en) | 2016-08-25 | 2016-08-25 | A kind of laser assembly solder method of titanium microalloying carbon manganese steel |
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| CN201610726561.9A CN106238915A (en) | 2016-08-25 | 2016-08-25 | A kind of laser assembly solder method of titanium microalloying carbon manganese steel |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107876984A (en) * | 2017-10-31 | 2018-04-06 | 中车青岛四方机车车辆股份有限公司 | Gap weldig method and device |
| CN108453384A (en) * | 2018-03-27 | 2018-08-28 | 钢铁研究总院 | A method of reducing the laser weld joint softening degree of high strength and ductility medium managese steel |
| CN114211110A (en) * | 2021-12-30 | 2022-03-22 | 苏州大学 | Laser welding method for improving toughness of welding seam |
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| WO2023123735A1 (en) * | 2021-12-30 | 2023-07-06 | 苏州大学 | Laser welding method for improving strength and toughness of weld joint |
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Application publication date: 20161221 |