CN105945428B - A kind of heat-absorbing paint and its application method for being used to improve unimach laser weld fusion penetration - Google Patents
A kind of heat-absorbing paint and its application method for being used to improve unimach laser weld fusion penetration Download PDFInfo
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- CN105945428B CN105945428B CN201610412023.2A CN201610412023A CN105945428B CN 105945428 B CN105945428 B CN 105945428B CN 201610412023 A CN201610412023 A CN 201610412023A CN 105945428 B CN105945428 B CN 105945428B
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- absorbing paint
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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
- 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
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
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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 provides a kind of heat-absorbing paint for being used to improve unimach laser weld fusion penetration, and its component and percentage by weight are as follows:Si02：25 30%, MnO：5 9%, CaO：6 20%, B2O3：Surplus.Heat-absorbing paint and its application method provided by the present invention for improving unimach laser weld fusion penetration; increase the fusion penetration of unimach laser weld in the case of equal laser beam power density; it ensure that joint being capable of complete penetraction and fusion in welding; the oxide heat-absorbing paint formation slag of fusing simultaneously plays a protective role to the weld metal of fusing; alloying element oxidation and the scaling loss in unimach are reduced, improves the Forming Quality of weld seam.
Description
Technical field
The invention belongs to weld and interconnection technique field, and in particular to for improving unimach laser weld fusion penetration
Heat-absorbing paint and its application method.
Background technology
Laser welding be by the use of high-energy-density laser beam as thermal source a kind of high-efficiency and precision welding method, with heat
Input quantity is low, speed of welding is fast, joint thermal deformation and heat affected area are small, melting pool shape depth-to-width ratio is big, seam organization thin and joint
The advantages of good toughness, in industrial circles such as machinery, automobile, shipbuilding, Aero-Space, steel, ocean engineering and piece surface reparations
Obtain increasingly extensive application.Laser beam focuses on the surface of workpiece by special optical lens in laser welding, due to
Metal material has the low feature of the high absorptivity of surface initial reflectance and radiation energy to laser beam, is acted on weldment
At the beginning of, most laser beam energy is all reflected away by metal material surface, and energy conversion efficiency is relatively low, and weldment can only be inhaled
Receive seldom part energy.Laser beam power density and metal material on the absorptivity of laser be influence weld penetration it is main because
Element.Laser welding metal material to obtain bigger weld penetration and ensure joint can complete penetraction and fusion in welding must using it is powerful swash
Photoelectric source or improve to laser can absorptivity.It is to ensure laser welding fusion penetration and metal material using powerful Laser Power Devices
The preferred measure of complete penetraction and fusion in welding.
Unimach refers to the steel grade strengthened by phase transformation, is that a small amount of niobium and/or titanium is added in mild steel
Etc. a variety of alloying elements, strengthen by solid solution, precipitation strength, grain refining strengthening and strain build up, make itself and carbon, nitrogen
Deng element formation carbide, nitride and separated out on ferrite matrix so as to improve the intensity of steel.Laser welding superhigh intensity
Steel uses powerful Laser Power Devices, on the one hand improves laser welding apparatus cost；Another aspect unimach Laser Welding
Laser beam power is improved in termination process can cause the alloying element scaling loss in steel serious to increase the fusion penetration of weld seam, destruction alloy member
The invigoration effect of element, reduces the mechanical property of welding point.Bigger weld seam is obtained under relatively low laser power in order to be able to realize
Fusion penetration, stable welding process and excellent quality of weld seam molding, in recent years, researcher research and develop a variety of laser and other thermals source
The welding procedure being combined, such as laser and electric arc, laser and plasma arc, laser and sensing thermal source composite welding, double excitation
Beam is welded and multi-beam laser is welded etc..Laser compound welding technical matters parameter is more complicated, welding head size than larger,
Joint form has the splashing produced during certain limitation, especially hybrid Laser-Arc Welding, slag and metal vapors
Deng the pollution and the damage of focus lamp to laser head protective glass plate laser energy can be caused gradually to reduce, degree is reduced when serious
90% is reached, how to prevent splashing, slag and metal vapors in welding process etc. from polluting cover plate and the damage of laser head
Focus lamp is an important technology problem；At the same time, how further to prevent the oxidation of weld metal and reduce alloying element
Scaling loss, improve the mechanical property of welding point, it is ensured that welding point and mother metal equal strength be also in laser beam welding urgently
The technical barrier of solution.At present, the related application skill of weld penetration is increased about improving metal material to laser energy absorptivity
Art is there is not yet play-by-play.
The content of the invention
It is an object of the invention to provide it is a kind of be used for improve unimach laser weld fusion penetration heat-absorbing paint and its
Increase the fusion penetration of unimach laser weld in the case of application method, equal laser beam power density, it is ensured that joint
Can complete penetraction and fusion in welding, while fusing oxide heat-absorbing paint formation slag the weld metal of fusing is played a protective role, reduce
Alloying element oxidation and scaling loss in unimach, improve the Forming Quality of weld seam.
The purpose of the present invention is achieved through the following technical solutions：
A kind of heat-absorbing paint for being used to improve unimach laser weld fusion penetration, its component and weight percent are such as
Under：
It is used as currently preferred technical scheme：A kind of heat absorption for being used to improve unimach laser weld fusion penetration is applied
The component and percentage by weight of material are as follows：
It is used as currently preferred technical scheme：Described B2O3、Si02, MnO and CaO granularity be 20-50 μm, purity
For 99.9%.
A kind of application method for being used to improve the heat-absorbing paint of unimach laser weld fusion penetration, step is as follows：
A. by Si02, MnO, CaO and B2O3By the well mixed powder for obtaining oxide heat-absorbing paint of above percentage by weight
Particle；
B. the powder particle that oxide heat-absorbing paint is made in step A is added into binding agent to be well mixed, be granulated and 400 DEG C
Crushed again after drying below, screen 20-50 μm of oxide heat-absorbing paint particle of particle diameter therein；
C. by 20-50 μm of oxide heat-absorbing paint particle spray coating of particle diameter in step B in superhigh intensity steel construction to be welded
The welding point surface of part, is welded using Laser Welding afterwards.
It is used as currently preferred technical scheme：35 μm of oxide heat absorptions of particle diameter therein are screened in described step B to apply
Expect particle.
It is used as currently preferred technical scheme：The technique of spraying described in step C can be using plasma spraying, brush
Apply or gas spraying.
It is used as currently preferred technical scheme：Quantity for spray described in step C is 7-9mg/cm2。
It is used as currently preferred technical scheme：Quantity for spray described in step C is 8mg/cm2。
Compared with prior art, the beneficial effects of the invention are as follows：
1st, the method that the present invention is provided can improve absorptivity of the metal material to be welded to laser energy, in equal light beam power
The fusion penetration of unimach laser weld is significantly increased in the case of density；Ensure joint can complete penetraction and fusion in welding,
2nd, the oxide heat-absorbing paint formation slag of fusing plays a protective role to the weld metal of fusing, reduces superelevation strong
Alloying element oxidation and the scaling loss spent in steel, improve the Forming Quality of weld seam.
Brief description of the drawings
Fig. 1 is the laser for using the heat-absorbing paint provided by the present invention for improving unimach laser weld fusion penetration
Welded seam fusion penetration schematic diagram；
Fig. 2 is unused provided by the present invention for improving swashing for the heat-absorbing paint of unimach laser weld fusion penetration
Photocoagulation weld penetration schematic diagram.
Embodiment
The heat-absorbing paint of the present invention for being used to improve unimach laser weld fusion penetration is with B2O3Based on into
Point, add Si02, MnO and CaO constitute oxide heat-absorbing paint.B2O3Fusion temperature is 580 DEG C, can be acted on metal oxide
Meltable borate is formed, reaction equation is：B2O3+MeO→MeO·B2O3, borate floats over weld metal table in the form of slag
On face, the oxide effect for removing superhigh intensity steel surface can be reached, mechanical protection effect, protection weld zone gold can be played again
Belong to the infringement from air.Si02Resistivity and molten boiling point with MnO is higher, and raising is played in welding process to laser beam
Absorptivity, effectively increase unimach laser weld fusion penetration.CaO is basic anhydride, with B2O3Act on the boron formed
Hydrochlorate viscosity is low, good fluidity, can reduce the liquid surface tension force of fusing weld metal and improve the shaping of face of weld.Material
Absorption to laser depends on the physical and chemical properties of material itself, such as absorptivity, reflectivity, thermal conductivity, fusion temperature, steaming
Temperature etc. is sent out, most important of which is that absorptivity.There is document report, influence material has two to the factor of the absorptivity of laser beam
Individual factor, one is the resistance coefficient of material, and material absorptivity is directly proportional to the square root of resistance coefficient；Two be the surface shape of material
State (or finish) has more important influence on beam absorption, so as to produce obvious effect to welding effect.Ceramics, glass, rubber
Absorptivity of the nonmetallic materials such as glue and plastics in room temperature to laser is higher, and absorption of the metal material in room temperature to laser
Rate is very low, and the only absorption in metal material melting or even gasification to laser beam is just sharply increased.Obviously, surface is using heat absorption
The method of coating or Surface Creation oxide-film, improves absorption of the metal material to laser beam highly effective.It is of the present invention to use
In the heat-absorbing paint for improving unimach laser weld fusion penetration particle size to the joint of laser welding unimach
Quality has a major impact, and particle size influence is sprayed on the attachment by welding structure part oxide on surface heat-absorbing paint and workpiece
Intensity.Oxide heat-absorbing paint particle size is small, and the specific surface area of particle is big, is conducive to improving the absorptivity to laser beam,
Effectively increase the fusion penetration of unimach laser weld.Oxide heat-absorbing paint particle size is too small, and the attachment with workpiece is strong
Degree is low, it is easy to which protected gas is dispelled, and can influence the fusion penetration of weld seam.In addition, by welding structure part welding point surface spraying unit
The amount of area oxide heat-absorbing paint can also influence unimach laser weld fusion penetration and weld strength.Welded by welding structure part
The amount for connecing joint surface spraying oxide heat-absorbing paint is excessive, can produce slag in weld, lack of fusion and the welding such as lack of penetration and lack
Fall into.Therefore, laser welding unimach is also required to the unit area quantity for spray of accurate control oxide heat-absorbing paint.
The embodiment being given by the following further is specifically described to the inventive method.
It is of the present invention it is a kind of be used to improve the heat-absorbing paint of unimach laser weld fusion penetration, it is constituted and again
Measure percentage as follows：Si02 is that 25-30%, MnO are that 5-8%, CaO are that 16-20%, B2O3 are surplus.
A kind of application method for being used to improve the heat-absorbing paint of unimach laser weld fusion penetration of the present invention,
Step is as follows：
A. by Si02, MnO, CaO and B2O3 by the well mixed powder for obtaining oxide heat-absorbing paint of following percentage by weight
Last particle：Si02 is that 25-30%, MnO are that 5-8%, CaO are that 16-20%, B2O3 are surplus；
B. the powder particle that oxide heat-absorbing paint is made in step A is added into binding agent to be well mixed, be granulated and 400 DEG C
Crushed again after drying below, screen 20-50 μm of oxide heat-absorbing paint particle of particle diameter therein；
C. by 20-50 μm of oxide heat-absorbing paint particle spray coating of particle diameter in step B in superhigh intensity steel construction to be welded
The welding point surface of part, is welded using Laser Welding afterwards.
The oxide heat-absorbing paint of preparation is used for the laser welding of unimach by following such as above steps of implementing, and swashs
Welding machine is CO2Laser, bonding power P=1.0kw, welding speed V=2000mm/min, defocusing amount F=0mm, side-blown gas
For pure Ar, flow is 30L/min.
Embodiment 1-9 is shown in Table 1：
The oxide heat-absorbing paint of table 1 is matched and its postwelding joint performance
As a result show：It is of the present invention to be used to improve the heat-absorbing paint of unimach laser weld fusion penetration and its make
With method, the technical indicator reached according to above-mentioned oxide heat-absorbing paint and processing step：
(1) under constructed Parameter Conditions, superhigh intensity steel construction piece welding point surface spraying oxide heat-absorbing paint
Laser welding is carried out, one time welded seam fusion penetration increases 14-21%；
(2) the face of weld beautiful appearance that laser welding is obtained.
Claims (7)
1. a kind of heat-absorbing paint for being used to improve unimach laser weld fusion penetration, it is characterised in that its component and weight
Percentage is as follows：
2. a kind of heat-absorbing paint for being used to improve unimach laser weld fusion penetration as claimed in claim 1, its feature
It is, its component and percentage by weight are as follows：
3. a kind of heat-absorbing paint for being used to improve unimach laser weld fusion penetration as claimed in claim 1, its feature
It is, described B2O3、Si02, MnO and CaO granularity be 20-50 μm, purity is 99.9%.
4. a kind of user for being used to improve the heat-absorbing paint of unimach laser weld fusion penetration as claimed in claim 1
Method, it is characterised in that step is as follows：
A. by Si02, MnO, CaO and B2O3By the well mixed powder for obtaining oxide heat-absorbing paint of above percentage by weight
Grain：
B. the powder particle that oxide heat-absorbing paint is made in step A is added into binding agent to be well mixed, be granulated and less than 400 DEG C
Crushed again after drying, screen 20-50 μm of oxide heat-absorbing paint particle of particle diameter therein；
C. by 20-50 μm of oxide heat-absorbing paint particle spray coating of particle diameter in step B in superhigh intensity steel construction piece to be welded
Welding point surface, carries out Laser Welding welding afterwards.
5. a kind of user for being used to improve the heat-absorbing paint of unimach laser weld fusion penetration as claimed in claim 4
Method, it is characterised in that 35 μm of oxide heat-absorbing paint particles of particle diameter therein are screened in described step B.
6. a kind of user for being used to improve the heat-absorbing paint of unimach laser weld fusion penetration as claimed in claim 4
Method, it is characterised in that the quantity for spray described in step C is 7-9mg/cm2。
7. a kind of user for being used to improve the heat-absorbing paint of unimach laser weld fusion penetration as claimed in claim 4
Method, it is characterised in that the quantity for spray described in step C is 8mg/cm2。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610412023.2A CN105945428B (en) | 2016-06-14 | 2016-06-14 | A kind of heat-absorbing paint and its application method for being used to improve unimach laser weld fusion penetration |
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| CN201610412023.2A CN105945428B (en) | 2016-06-14 | 2016-06-14 | A kind of heat-absorbing paint and its application method for being used to improve unimach laser weld fusion penetration |
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| CN113751842B (en) * | 2021-09-02 | 2022-06-21 | 吉林农业科技学院 | Spraying material and high-nitrogen steel welding process based on thermal spraying pretreatment |
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