CN106425104B - A kind of titanium steel multiple tube single face welding and double face shaping welding method - Google Patents
A kind of titanium steel multiple tube single face welding and double face shaping welding method Download PDFInfo
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- CN106425104B CN106425104B CN201611101446.9A CN201611101446A CN106425104B CN 106425104 B CN106425104 B CN 106425104B CN 201611101446 A CN201611101446 A CN 201611101446A CN 106425104 B CN106425104 B CN 106425104B
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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
- B23K26/346—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding
- B23K26/348—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding in combination with arc heating, e.g. TIG [tungsten inert gas], MIG [metal inert gas] or plasma welding
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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
- B23K26/60—Preliminary treatment
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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
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
- B23K33/004—Filling of continuous seams
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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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
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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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
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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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/16—Composite materials, e.g. fibre reinforced
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Abstract
A kind of titanium steel multiple tube single face welding and double face shaping welding method, suitable for the welding of titanium steel multiple tube.The problem of present invention is complicated for operation in order to solve welding process existing for existing titanium steel composite tube welding, and accumulation heat input is big, needs to prepare dedicated wlding, and welding efficiency is low, and then a kind of titanium steel multiple tube single face welding and double face shaping welding method is provided.Include the following steps：1), in flat groove of the tube end maching with root face of titanium steel multiple tube to be welded；2) welding region, is cleared up；3), the titanium alloy layer of titanium steel multiple tube is welded using method for laser welding；4) it, uses acetone as bonding agent and paste is made in uniformly mixed transition metal powder, uniform welding groove bottom compresses and carries out drying and processing；5) transition zone, is formed using laser energy fusing transition metal first, then the filling of steel metal layer is carried out using arc welding.The method achieve the welding of the single face welding and double face shaping of titanium steel multiple tube, improve the welding quality of titanium steel multiple tube.
Description
Technical field
The present invention relates to a kind of titanium steel multiple tube single face welding and double face shaping welding methods, belong to welding technology field.
Background technology
Under certain Special use environment, single metal is difficult to the performance requirement for meeting workpiece, by selecting suitable gold
Belong to combination, be complementary to one another performance, then can obtain the composite metal plate that can be suitable for this particular/special requirement.Form composite plate
Each layer metal still keep respective original characteristic, while the single metal of performance ratio is more superior.Titanium has very oxygen because of it
Big affinity can generate one layer of fine and close oxidation film on the surface thereof, can protect titanium not by dielectric corrosion.Therefore, titanium is in acid
Property, there is in alkalinity, neutral saline solutions and in Oxidant good stability and corrosion resistance, titanium alloy extensively should
For industries such as oil, chemical industry, metallurgy, sea water desalination shipbuilding, electric power and ocean engineerings.But titanium alloy cost is higher, it will
Titanium alloy and other metal composites, are made metallic composite, can not only play the excellent properties of titanium, but also can reduce cost, and titanium-
Steel composite material is exactly such a material.
Titanium steel multiple tube is by hydraulic method, hot extrusion method, spinning process, explosive welding process, centre spinning, built-up welding or heat
Titanium steel composite material is made in titanium and steel by the methods of rolling；Titanium steel multiple tube includes the titanium alloy layer inside pipe, the gold of the steel outside pipe
Belong to layer and the faying face of titanium alloy layer and steel metal layer (compound interface layer).Wherein, titanium alloy layer is in composite metal plate
Anticorrosion layer, steel metal layer thickness is thicker, is the stress layer in composite metal plate.Titanium steel multiple tube can both play the corrosion-resistant of titanium
Excellent properties, and can reduce be used alone titanium alloy significant cost.Titanium steel multiple tube is used extensively with its excellent performance
Make the special tubing of anticorrosion, have in chemical industry liquefied gas pipe, petroleum gas delivering pipe, oil well multiple tube wide
Application prospect.
It is real although titanium steel multiple tube belongs to the welding of dissimilar metal with very excellent performance, the welding of titanium and steel
There is very high requirement on border in its joint corrosion resistance, bearing capacity and intensity.Since Fe is in Ti
Solubility it is extremely low, when Fe content be more than 0.1% when, then can form TiFe and TiFe2Etc. compound between hard brittle metal, make weldering
The plasticity of seam reduces, brittleness increases, therefore during the direct melting welding of titanium steel multiple tube, the weld seam of titanium and steel easily shape in the welding process
Into crackle.
At present, the welding method of titanium steel multiple tube is mainly argon tungsten-arc welding, is needed using different welding wires to titanium layer, mistake
Cross layer and steel layer and carry out multi-layer multi-pass welding, when carrying out filler wire welding using argon tungsten-arc welding, although single track heat input compared with
It is small, but welding layer road number is relatively more, and heat accumulation is larger, and Seam and heat effected zone metal is long in the residence time of high temperature, brilliant
The big tendency of grain length is obvious, so as to cause the reduction of the toughness of welding point and corrosive nature.Preparation for transition zone needs
Corresponding welding wire is specially produced, increases the cost of welding.Laser welding has energy density compared with traditional welding method
The advantages that height, heat input is low, and heat affected area is narrow helps to improve quality of weld joint.
Invention content
The goal of the invention of the present invention is complicated for operation in order to solve welding process existing for existing titanium steel composite tube welding, is tired out
The problem of accumulated heat input is big, and welding stress deformation is big, and welding efficiency is low, so provide a kind of titanium steel multiple tube single face welding and double face into
Type welding method.This method realizes the full penetration of titanium steel multiple tube, improves welding quality and the weldering of titanium steel multiple tube
Efficiency is connect, has expanded the application range of titanium steel multiple tube.
The present invention realizes that its goal of the invention is adopted the technical scheme that：A kind of titanium steel multiple tube single face welding and double face shaping weldering
Method is connect, is included the following steps：
1) welding groove, is processed：On flat groove of the tube end maching with root face of titanium steel multiple tube to be welded, the flat slope
The titanium alloy layer of titanium steel multiple tube to be welded is close on the base of mouth, and root face size is titanium alloy layer thickness；
2) welding region, is cleared up：It clears up the groove of titanium steel multiple tube to be welded, treat welding zone and peripheral region；Specific practice is：
Clear up the groove of titanium steel multiple tube to be welded and region to be welded, cleaning area should be not less than the 15mm of bevelled edge, go impurity removing and
Then oxidation film treated welding zone and treated around welding zone, organics removal impurity with alcoholic solution cleaning, can reduce be mingled in welding,
The generation of the defects of stomata ensures welding quality.
3), the bottoming welding of titanium alloy layer：The titanium alloy layer of titanium steel multiple tube is welded using method for laser welding；
4), preset transition metal powder：Bonding agent is used acetone as by uniformly mixed transition metal powder system
Into paste, the groove bottom of the titanium steel multiple tube to be welded after being welded by step 3) bottoming is uniformly filled in, fills layer thickness
For 1.5-2mm, compress and carry out drying and processing；The transition metal powder is made of following weight percent：Niobium 10-
The sum of 20%, vanadium 30-40%, beryllium 30-40%, copper 10-20%, said components weight percent are 100%；
5), the welding of transition zone and capping layer：The preset metal powder of step 4) is melted using laser as heat source, makes it
It fuses to form transition zone with titanium alloy layer；Then the filling weldering of the steel metal layer of titanium steel multiple tube is carried out using metal arc welding
It connects, forms capping layer.
Compared with prior art, the beneficial effects of the invention are as follows：
First, the present invention can reduce welding deformation using the bottoming welding of laser beam bottoming welding titanium alloy layer first, prevent
Only multiple tube interface generation brittlement phase.Be conducive to put transition metal powder using the flat groove with root face, prepare transition
The fusion transition of layer and transition zone and titanium alloy layer and steel metal layer；Then laser is used to melt preset metal powder as heat source
End makes the fusion of itself and titanium alloy is good to form transition zone, improves welding efficiency, at the same reduce the preparation of transition zone wlding into
This, is conducive to the fusion transition of transition zone and titanium alloy layer and steel metal layer.Titanium steel is carried out finally by metal arc welding to answer
Close the filling welding of the steel metal layer of pipe.
2nd, the method for the present invention, which has obstructed, forms brittlement phase between Fe and Ti, the final single welding for realizing titanium steel multiple tube is double
Face is molded, and significantly improves welding efficiency and quality；Compared with existing welding technique, the present invention can improve composite tube welding and connect
The obdurability of head reduces welding layer road number, improves welding efficiency and quality, expands the application range of titanium steel multiple tube.
Further, the flat groove with root face processed in step 1) of the present invention is the flat trapezoidal slope with root face
Mouthful, for bevel angle to be 15-20 ° unilateral, groove base width is 1.4-2.4mm.
In this way, using bevel angle as flat trapezoidal groove 15-20 ° unilateral, be conducive to the bottoming welding of titanium alloy layer
Progress, prevent multiple tube interface generate brittlement phase；The groove base of this size is used to prepare transition zone, is conducive to transition
The fusion transition of layer metal and titanium alloy layer and steel metal layer obstructs and forms brittlement phase between Fe and Ti, improves composite tube welding
The obdurability of connector.
After step 2) cleaning welding region of the present invention, titanium steel composite pipe sections to be welded need to clamp Butt Assembling, dress
It is 0-0.2mm with gap.
Further, step 3) of the present invention welds the titanium alloy layer of titanium steel multiple tube using method for laser welding
Before, titanium steel multiple tube is first preheating to 100-120 DEG C；It is not less than in welding process and postwelding cooling procedure using purity
99.999% high-purity argon gas protects the weld metal of weld metal zone, heat affected area and temperature higher than 295 DEG C.
The 100-120 DEG C of cooling velocity that can slow down postwelding is preheating to before welding, is conducive to the ease of diffusible hydrogen in weld metal
Go out, avoid generating hydrogen induced cracking, improve the crack resistance of welding point；The temperature between welding region welded piece can be reduced simultaneously
Degree is poor, reduces welding stress and weld strain rate, is conducive to avoid generating weld crack.
It mainly can prevent high-temperature titanium alloy and transition metal from being aoxidized the protection of weld seam and peripheral region, cause to weld
Connect defect；Since titanium has very strong chemical activity at high temperature, titanium is in 300 DEG C or more quick suction hydrogen, 600 DEG C or more quick suctions
Oxygen, 700 DEG C or more quick suction nitrogen.It is found through experiment that temperature is higher than 295 DEG C in welding process and postwelding cooling procedure to titanium
Region, which carries out protection, not to be chemically reacted with effective protection titanium alloy.
Further, step 3) of the present invention welds the titanium alloy layer of titanium steel multiple tube using method for laser welding
The welding parameter connect is：Laser power 2.0-3.0kW, laser focal 300mm, speed of welding 1.5-2.0m/min, heat input are：
Q=65-75J/mm.
It is found through a large number of experiments, thermal weld stress can be reduced using more than welding parameter, become so as to reduce welding
Shape and thermal stress；The width of welding heat affected zone can also be reduced, be conducive to appearance of weld and welding quality.
Further, the metal powder that laser is preset as heat source fusing step 4) is used in step 5) of the present invention, is made
It is fused with titanium alloy layer to form the concrete operations requirement of transition zone and is：It should make hot spot ruler when laser spot position is adjusted during welding
The very little maximum width more than transition zone filling metal melts preset metal powder using laser energy and forms transition zone, protects simultaneously
Card sidewall fusion is good, and welding parameter used is：Laser power 2.0-2.5kW, speed of welding 0.6-1.2m/min, hot spot ruler
Very little 1.8-2.8mm.
In this way, by controlling laser facula size, it is ensured that transition metal powder and welding groove fusion are good, and
Stable transition zone is formed with titanium alloy side and steel side metal, inhibits the generation of compound between hard brittle metal, ensures welding point
Obdurability.
Further, filling out for the steel metal layer of titanium steel multiple tube is carried out using metal arc welding in step 5) of the present invention
Welding is filled, welding wire used is CHW-62GX, and welding parameter used is：Welding current is 100-160A, voltage 16-20V, is done
Extend 8-12mm, speed of welding 0.6-0.9m/min.
It is found through a large number of experiments, can prevent filling metal from transition zone being passed through to be formed between metal using more than welding parameter and change
Close object；The heat input during welding of steel metal layer is reduced simultaneously, is reduced the scaling loss of alloying element, is reduced heat affected area width, protects
Demonstrate,prove the toughness of weld seam；Welding deformation and welding residual stress can additionally be reduced.
Further, step 5) of the present invention carries out the filling of the steel metal layer of titanium steel multiple tube using metal arc welding
In welding, for titanium steel multiple tube of the steel metal layer thickness more than 3mm using multilayer welding filling welding.
Steel metal layer is to prevent the excessive arc force of parameter from contacting shape with titanium alloy layer to the impact of transition metal when welding
Into intermetallic compound, while thick plates are more than 3mm to ensure loading and control heat input for steel metal layer thickness
Titanium steel multiple tube need to carry out multi-layer welding using small welding parameter.
Further, it in the welding process of step 5) transition zone and capping layer of the present invention and postwelding cooling procedure, adopts
The weld metal of weld metal zone, heat affected area and temperature higher than 295 DEG C is carried out with high-purity argon gas of the purity not less than 99.999%
Protection.
It mainly can prevent high-temperature titanium alloy and transition metal from being aoxidized the protection of weld seam and peripheral region, cause to weld
Connect defect；In addition, since titanium has a very strong chemical activity at high temperature, titanium 300 DEG C or more it is quick inhale hydrogen, 600 DEG C or more
Quick oxygen uptake, 700 DEG C or more quick suction nitrogen.It is found through experiment that 295 DEG C are higher than to temperature in welding process and postwelding cooling procedure
Region carry out protection can not be chemically reacted with effective protection titanium alloy.
The present invention is described in further details with reference to the accompanying drawings and detailed description.
Description of the drawings
Fig. 1 is the welding groove design drawing of titanium steel multiple tube full penetration of the embodiment of the present invention.
Fig. 2 is that the embodiment of the present invention processes the titanium steel multiple tube schematic diagram after welding groove.
Fig. 3 is titanium steel multiple tube of embodiment of the present invention titanium alloy layer welding schematic diagram.
Fig. 4 is titanium steel multiple tube transition zone LASER BEAM WELDING schematic diagram of the embodiment of the present invention.
Fig. 5 is the weld joint schematic diagram of titanium steel multiple tube postwelding of the embodiment of the present invention.
In figure, d1For steel metal layer thickness, d2For titanium alloy layer thickness (root face size), θ is the both sides welding groove child's hair twisted in a knot-childhood
Degree, a are flat groove base width；1.1 be steel metal layer, and 1.2 be titanium alloy layer, and 2.1 be welding groove, and 2.2 be preset
Transition metal powder, 3.1 be welding titanium alloy layer when laser beam used, 3.2 be welding transition layer when laser beam used, 4.1
It is transition zone weld seam for titanium alloy layer weld seam, 4.2,4.3 be steel metal layer weld seam.
Specific embodiment
Embodiment one
The present invention a kind of specific embodiment be：A kind of titanium steel multiple tube (titanium alloy layer 3mm+ steel metal layer 3-8mm,
Obtained by milling method) single face welding and double face shaping welding method, include the following steps：
1) welding groove, is processed：It is described flat in flat trapezoidal groove of the tube end maching with root face of titanium steel multiple tube to be welded
The titanium alloy layer of titanium steel multiple tube to be welded is close on the base of base slope mouth, and root face size is titanium alloy layer thickness；The bevel angle
It it is unilateral 15-20 °, groove base size is 1.4-2.4mm；Fig. 1 is this example welding groove design drawing, and Fig. 2 is that this example processes
Titanium steel multiple tube schematic diagram after welding groove；
2) welding region, is cleared up：The groove of titanium steel multiple tube to be welded and region to be welded are cleared up, cleaning area should be not less than slope
The 15mm at mouth edge, removes impurity removing and oxidation film, then treats welding zone with alcoholic solution cleaning and treats around welding zone, organics removal
Impurity, can reduce welding in be mingled with, stomata the defects of generation, ensure welding quality；
3), the bottoming welding of titanium alloy layer：The titanium alloy layer of titanium steel multiple tube is welded using method for laser welding；
Before welding, titanium steel multiple tube is first preheating to 100-120 DEG C；It is not less than in welding process and postwelding cooling procedure using purity
99.999% high-purity argon gas protects the weld metal of weld metal zone, heat affected area and temperature higher than 295 DEG C；The laser
The welding parameter of welding is：Laser power 2.0-3.0kW, laser focal 300mm, speed of welding 1.5-2.0m/min, heat input
For：Q=65-75J/mm；Fig. 3 welds schematic diagram for this example titanium alloy layer；
4), preset transition metal powder：Bonding agent is used acetone as by uniformly mixed transition metal powder system
Into paste, the groove bottom of the titanium steel multiple tube to be welded after being welded by step 3) bottoming is uniformly filled in, fills layer thickness
For 1.5-2mm, compression ensures tight, and carry out drying and processing；The transition metal powder is by following weight percent group
Into：The sum of niobium 10-20%, vanadium 30-40%, beryllium 30-40%, copper 10-20%, said components weight percent are 100%；
5), the welding of transition zone and capping layer：The preset metal powder of step 4) is melted using laser as heat source, makes it
It fuses to form transition zone with titanium alloy layer, concrete operations requirement is：It should make hot spot ruler when laser spot position is adjusted during welding
The very little maximum width more than transition zone filling metal melts preset metal powder using laser energy and forms transition zone, protects simultaneously
Card sidewall fusion is good, and welding parameter used is：Laser power 2.0-2.5kW, speed of welding 0.6-1.2m/min, hot spot ruler
Very little 1.8-2.8mm；Fig. 4 is this example titanium steel multiple tube transition zone LASER BEAM WELDING schematic diagram；
Then the filling welding of the steel metal layer of titanium steel multiple tube is carried out using metal arc welding, capping layer is formed, melts
It is CHW-62GX to change pole electrical arc weldering welding wire used, and welding parameter used is：Welding current is 100-160A, voltage 16-
20V, stem elongation 8-12mm, speed of welding 0.6-0.9m/min；Titanium steel multiple tube of the steel metal layer thickness more than 3mm is adopted
It is filled and welded with multilayer welding.
In this example in transition zone and the welding process of capping layer and postwelding cooling procedure, it is not less than using purity
99.999% high-purity argon gas protects the weld metal of weld metal zone, heat affected area and temperature higher than 295 DEG C, welding gas
It protects as 20L/min.
Fig. 5 shows, the weld joint schematic diagram of the present embodiment titanium steel multiple tube postwelding.
Embodiment two
The present invention another specific embodiment be：A kind of titanium steel multiple tube (titanium alloy layer 3mm+ steel metal layers 3-
8mm is obtained by milling method) single face welding and double face shaping welding method, include the following steps：
1) welding groove, is processed：On flat groove of the tube end maching with root face of titanium steel multiple tube to be welded, the flat slope
The titanium alloy layer of titanium steel multiple tube to be welded is close on the base of mouth, and root face size is titanium alloy layer thickness；The bevel angle is single
15-20 ° of side, groove base size are 1.4-2.4mm；
2) welding region, is cleared up：The groove of titanium steel multiple tube to be welded and region to be welded are cleared up, cleaning area should be not less than slope
The 15mm at mouth edge, removes impurity removing and oxidation film, then treats welding zone with alcoholic solution cleaning and treats around welding zone, organics removal
Impurity, can reduce welding in be mingled with, stomata the defects of generation, ensure welding quality；
3), the bottoming welding of titanium alloy layer：The titanium alloy layer of titanium steel multiple tube is welded using method for laser welding；
Before welding, titanium steel multiple tube is first preheating to 100-120 DEG C；It is not less than in welding process and postwelding cooling procedure using purity
99.999% high-purity argon gas protects the weld metal of weld metal zone, heat affected area and temperature higher than 295 DEG C；The laser
The welding parameter of welding is：Laser power 2.0-3.0kW, laser focal 300mm, speed of welding 1.5-2.0m/min, heat input
For：Q=65-75J/mm；
4), preset transition metal powder：Bonding agent is used acetone as by uniformly mixed transition metal powder system
Into paste, the groove bottom of the titanium steel multiple tube to be welded after being welded by step 3) bottoming is uniformly filled in, fills layer thickness
For 1.5-2mm, compression ensures tight, and carry out drying and processing；The transition metal powder is by following weight percent group
Into：The sum of niobium 10-20%, vanadium 30-40%, beryllium 30-40%, copper 10-20%, said components weight percent are 100%；
5), the welding of transition zone and capping layer：The preset metal powder of step 4) is melted using laser as heat source, makes it
It fuses to form transition zone with titanium alloy layer, concrete operations requirement is：It should make hot spot ruler when laser spot position is adjusted during welding
The very little maximum width more than transition zone filling metal melts preset metal powder using laser energy and forms transition zone, protects simultaneously
Card sidewall fusion is good, and welding parameter used is：Laser power 2.0-2.5kW, speed of welding 0.6-1.2m/min, hot spot ruler
Very little 1.8-2.8mm；
Then the filling welding of the steel metal layer of titanium steel multiple tube is carried out using metal arc welding, capping layer is formed, melts
It is CHW-62GX to change pole electrical arc weldering welding wire used, and welding parameter used is：Welding current is 100-160A, voltage 16-
20V, stem elongation 8-12mm, speed of welding 0.6-0.9m/min；Titanium steel multiple tube of the steel metal layer thickness more than 3mm is adopted
It is filled and welded with multilayer welding.
In this example in transition zone and the welding process of capping layer and postwelding cooling procedure, it is not less than using purity
99.999% high-purity argon gas protects the weld metal of weld metal zone, heat affected area and temperature higher than 295 DEG C, welding gas
It protects as 20L/min.
Claims (7)
1. a kind of titanium steel multiple tube single face welding and double face shaping welding method, includes the following steps：
1) welding groove, is processed：In flat groove of the tube end maching with root face of titanium steel multiple tube to be welded, the flat groove
The titanium alloy layer of titanium steel multiple tube to be welded is close on base, and root face size is titanium alloy layer thickness；
2) welding region, is cleared up：It clears up the groove of titanium steel multiple tube to be welded, treat welding zone and peripheral region；
3), the bottoming welding of titanium alloy layer：The titanium alloy layer of titanium steel multiple tube is welded using method for laser welding；
4), preset transition metal powder：It uses acetone as bonding agent and paste is made in uniformly mixed transition metal powder
Shape, is uniformly filled in the groove bottom of the titanium steel multiple tube to be welded after being welded by step 3) bottoming, and filling layer thickness is
1.5-2mm is compressed and is carried out drying and processing；The transition metal powder is made of following weight percent：Niobium 10-20%,
The sum of vanadium 30-40%, beryllium 30-40%, copper 10-20%, said components weight percent are 100%；
5), the welding of transition zone and capping layer：The preset metal powder of step 4) is melted using laser as heat source, makes itself and titanium
Alloy-layer fuses to form transition zone；Then the filling welding of the steel metal layer of titanium steel multiple tube is carried out using metal arc welding,
Form capping layer；
It is first that titanium steel is compound before the step 3) welds the titanium alloy layer of titanium steel multiple tube using method for laser welding
Pipe is preheating to 100-120 DEG C；Using high-purity argon gas pair of the purity not less than 99.999% in welding process and postwelding cooling procedure
Weld metal zone, heat affected area are protected.
2. a kind of titanium steel multiple tube single face welding and double face shaping welding method according to claim 1, it is characterised in that：It is described
The flat groove with root face processed in step 1) is the flat trapezoidal groove with root face, and bevel angle is 15-20 ° of unilateral side,
Groove base width is 1.4-2.4mm.
3. a kind of titanium steel multiple tube single face welding and double face shaping welding method according to claim 1, it is characterised in that：It is described
Step 3) is using the welding parameter that method for laser welding welds the titanium alloy layer of titanium steel multiple tube：Laser power 2.0-
3.0kW, laser focal 300mm, speed of welding 1.5-2.0m/min, heat input are：Q=65-75J/mm.
4. a kind of titanium steel multiple tube single face welding and double face shaping welding method according to claim 1, it is characterised in that：It is described
The transition metal powder that laser is preset as heat source fusing step 4) is used in step 5), it is made to fuse to be formed with titanium alloy layer
The concrete operations of transition zone require：Spot size should be made to be more than preset transition zone gold when adjusting laser spot position during welding
Belong to the maximum width of powder, melting preset metal powder using laser energy forms transition zone, while ensure that sidewall fusion is good,
Welding parameter used is：Laser power 2.0-2.5kW, speed of welding 0.6-1.2m/min, spot size 1.8-2.8mm.
5. a kind of titanium steel multiple tube single face welding and double face shaping welding method according to claim 1, it is characterised in that：It is described
The filling welding of the steel metal layer of titanium steel multiple tube is carried out in step 5) using metal arc welding, welding wire used is CHW-
62GX, welding parameter used are：Welding current is 100-160A, voltage 16-20V, stem elongation 8-12mm, and speed of welding is
0.6-0.9m/min。
6. a kind of titanium steel multiple tube single face welding and double face shaping welding method according to claim 1, it is characterised in that：It is described
Step 5) is carried out using metal arc welding in the filling welding of the steel metal layer of titanium steel multiple tube, big for steel metal layer thickness
It is welded in the titanium steel multiple tube of 3mm using multilayer welding filling.
7. a kind of titanium steel multiple tube single face welding and double face shaping welding method according to claim 1, it is characterised in that：It is described
In step 5) transition zone and the welding process of capping layer and postwelding cooling procedure, 99.999% high-purity argon is not less than using purity
Gas protects weld metal zone, heat affected area.
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