CN106425104A - One-sided welding double-sided molding welding method for titanium steel composite pipe - Google Patents
One-sided welding double-sided molding welding method for titanium steel composite pipe Download PDFInfo
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- CN106425104A CN106425104A CN201611101446.9A CN201611101446A CN106425104A CN 106425104 A CN106425104 A CN 106425104A CN 201611101446 A CN201611101446 A CN 201611101446A CN 106425104 A CN106425104 A CN 106425104A
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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
-
- 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
- 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
-
- 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
-
- 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
-
- 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
Abstract
The invention provides a one-sided welding double-sided molding welding method which is suitable for welding a titanium steel composite pipe. The one-sided welding double-sided molding welding method aims at solving the problems that in existing titanium steel composite pipe welding, operation of the welding process is complicated, the accumulated heat input is large, it is necessary to prepare special welding consumables, and the welding efficiency is low. The one-sided welding double-sided molding welding method for the titanium steel composite pipe comprises the following steps that (1), a flat bottom groove with a blunt edge is machined at the pipe end of the titanium steel composite pipe to be welded; (2), a welding area is cleaned; (3), a titanium alloy layer of the titanium steel composite pipe is welded through a laser welding method; (4), acetone is used as a binder so that evenly-mixed transition layer metal powder can be made into paste, the groove bottom is evenly welded, pressing is conducted, and drying is conducted; and (5), transition layer metal is molten through laser energy, the transition layer is formed firstly, and then filling of the steel metal layer is conducted through electric arc welding. By the adoption of the method, one-sided welding double-sided molding welding of the titanium steel composite pipe is achieved, and the welding quality of the titanium steel composite pipe is improved.
Description
Technical field
The present invention relates to a kind of titanium steel multiple tube single face welding and double face shaping welding method, belongs to welding technology field.
Background technology
Under some Special use environment, single metal is difficult to meet the performance requirement of workpiece, by selecting suitably gold
Category combination, is complementary to one another performance, then can obtain the composite metal plate that can be suitable for this particular/special requirement.Composition composite plate
Each layer metal still keep each original characteristic, while performance is more superior than single metal.Titanium has very to oxygen because of which
Big affinity, can generate one layer of fine and close oxide-film in its surface, can protect titanium not by dielectric corrosion.Therefore, titanium is in acid
Property, in alkalescence, neutral saline solutions and with good stability and corrosion resistance in Oxidant, titanium alloy extensively should
For the industry such as oil, chemical industry, metallurgy, desalinization shipbuilding, electric power and ocean engineering.But, titanium alloy cost is higher, will
Titanium alloy and other metal composite, make metallic composite, can both play the excellent properties of titanium, again can reduces cost, titanium-
Steel composite material is exactly such a material.
Titanium steel multiple tube be by hydraulic method, hot extrusion method, spinning process, explosive welding process, centre spinning, built-up welding or heat
The method such as roll, titanium is made titanium steel composite material with steel；Titanium steel multiple tube includes the titanium alloy layer inside pipe, the gold of the steel outside pipe
Category layer and the faying face (compound interface layer) of titanium alloy layer and steel metal layer.Wherein, titanium alloy layer is in composite metal plate
Anticorrosion layer, steel metal thickness degree is thicker, is the stress layer in composite metal plate.Titanium steel multiple tube can both play the corrosion-resistant of titanium
Excellent properties, can reduce again be used alone titanium alloy significant cost.Titanium steel multiple tube is extensively used with its excellent performance
Make the special use tubing of anticorrosion, have in chemical industry liquefied gass pipe, petroleum gas delivering pipe, oil well multiple tube wide
Application prospect.
Although titanium steel multiple tube is with very excellent performance, the welding of titanium and steel belongs to the welding of dissimilar metal, real
Border using in have very high requirement to its joint decay resistance, bearing capacity and intensity.As Fe is in Ti
Dissolubility extremely low, when the content of Fe is more than 0.1%, then can form TiFe and TiFe2Etc. compound between hard brittle metal, weldering is made
The plasticity of seam reduces, fragility increases, therefore during the direct melting welding of titanium steel multiple tube, the weld seam of titanium and steel easily shape in welding process
Become crackle.
At present, the welding method of titanium steel multiple tube is mainly argon tungsten-arc welding, needs using different welding wires to titanium layer, mistake
Crossing layer and steel layer carries out multi-layer multi-pass welding, when filler wire welding is carried out using argon tungsten-arc welding, although single track heat input is relatively
Little, but weld layer road number is relatively more, and heat accumulation is larger, and Seam and heat effected zone metal is long in the time of staying of high temperature, brilliant
The big tendency of grain length is obvious, so as to cause the toughness of welding point and the reduction of corrosive nature.For the preparation of transition zone, need
Corresponding welding wire is specially produced, increased the cost of welding.Laser welding compared with traditional welding method, with energy density
Height, heat input is low, the advantages of heat affected area is narrow, is favorably improved quality of weld joint.
Content of the invention
The goal of the invention of the present invention be in order to solve existing titanium steel composite tube welding presence welding process complex operation, tire out
Accumulated heat input is big, and welding stress deformation is big, the low problem of welding efficiency, and then a kind of titanium steel multiple tube single face welding and double face of offer becomes
Type welding method.This method achieves 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 range of application of titanium steel multiple tube.
The present invention realizes its goal of the invention and 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 comprised the following steps：
1), bevel for welding is processed：On the 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, root face a size of titanium alloy layer thickness are close in the base of mouth；
2), welding region is cleared up：Clear 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, cut-back region should be not less than bevelled edge 15mm, go impurity removing and
Oxide-film, is then treated welding zone and is treated around welding zone, organics removal impurity with alcoholic solution cleaning, can reduce be mingled with welding,
The generation of the defects such as pore, it is ensured that welding quality.
3), the bottoming welding of titanium alloy layer：Using method for laser welding, the titanium alloy layer of titanium steel multiple tube is welded；
4), preset transition metal powder：Bonding agent is used acetone as by the transition metal powder system of mix homogeneously
Become pasty state, be uniformly filled in through step 3) bottoming welding after titanium steel multiple tube to be welded groove bottom, packed layer thickness
For 1.5-2mm, compress and carry out drying and processing；The transition metal powder is made up of following percentage by weight：Niobium 10-
20%, vanadium 30-40%, beryllium 30-40%, copper 10-20%, said components percentage by weight sum is 100%；
5), the welding of transition zone and capping layer：Laser is used to melt step 4 as thermal source) preset metal dust so as to
Fuse 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
Connect, form capping layer.
Compared with prior art, the invention has the beneficial effects as follows：
First, the present invention can reduce welding deformation initially with the bottoming welding of laser beam bottoming welding titanium alloy layer, prevent
Only multiple tube interface generates brittlement phase.Be conducive to putting transition metal powder using the flat groove with root face, prepare transition
Layer and the fusion transition of transition zone and titanium alloy layer and steel metal layer；Then laser is used to melt preset metal powder as thermal source
End makes itself and the good formation transition zone of titanium alloy fusion, improves welding efficiency, while reducing becoming for transition zone wlding preparation
This, be 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 multiple
Close the filling welding of the steel metal layer of pipe.
2nd, the inventive method has intercepted formation brittlement phase between Fe and Ti, and the single welding for finally realizing titanium steel multiple tube is double
Face molding, significantly improves welding efficiency and quality；Compared with existing solder technology, the present invention can improve composite tube welding and connect
The obdurability of head, reduces weld layer road number, improves welding efficiency and quality, expands the range of application of titanium steel multiple tube.
Further, step 1 of the present invention) in processing the flat groove with root face be the flat trapezoidal slope with root face
Mouthful, its bevel angle is unilateral 15-20 °, and groove base width is 1.4-2.4mm.
So, using the flat trapezoidal groove that bevel angle is unilateral 15-20 °, the bottoming of titanium alloy layer is conducive to weld
Carrying out, prevent multiple tube interface generate brittlement phase；The groove base of this size is used for preparing transition zone, is conducive to transition
Layer metal and the fusion transition of titanium alloy layer and steel metal layer, intercept between Fe and Ti and form brittlement phase, improve composite tube welding
The obdurability of joint.
Step 2 of the present invention) cleaning welding region after, need to by titanium steel composite pipe sections to be welded to Butt Assembling clamp, dress
Join gap for 0-0.2mm.
Further, step 3 of the present invention) using method for laser welding, the titanium alloy layer of titanium steel multiple tube is welded
Before, first titanium steel multiple tube is preheating to 100-120 DEG C；It is not less than using purity in welding process and postwelding cooling procedure
Weld metal of 99.999% high-purity argon gas to weld metal zone, heat affected area and temperature higher than 295 DEG C is protected.
The 100-120 DEG C of rate of cooling that can slow down postwelding is preheating to before welding, is conducive to the ease of diffusible hydrogen in weld metal
Go out, it is to avoid produce hydrogen induced cracking, improve the crack resistance of welding point；While the temperature between welding region welded piece can be reduced
Degree is poor, reduces welding stress and weld strain speed, is conducive to avoiding producing weld crack.
Protection to weld seam and peripheral region can mainly prevent high-temperature titanium alloy and transition metal oxidized, cause weldering
Connect defect；As titanium has very strong chemical activity at high temperature, titanium quickly inhales hydrogen, more than 600 DEG C quick suctions more than 300 DEG C
Oxygen, more than 700 DEG C are quickly inhaled nitrogen.Find through test, to titanium, in welding process and postwelding cooling procedure, temperature is higher than 295 DEG C
Region carries out protection and with effective protection titanium alloy, chemical reaction can not occur.
Further, step 3 of the present invention) using method for laser welding, the titanium alloy layer of titanium steel multiple tube is welded
The welding parameter for connecing is：Laser power 2.0-3.0kW, laser focal 300mm, speed of welding 1.5-2.0m/min, heat input is：
Q=65-75J/mm.
Find through lot of experiments, thermal weld stress can be reduced using above welding parameter, become such that it is able 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, step 5 of the present invention) used in laser melt step 4 as thermal source) preset metal dust, make
Its fuse with titanium alloy layer to be formed transition zone concrete operations require be：When laser spot position is adjusted during welding should make hot spot chi
The very little Breadth Maximum more than transition zone filler metal, melts preset metal dust using laser energy and forms transition zone, while protecting
Card sidewall fusion is good, and welding parameter used is：Laser power 2.0-2.5kW, speed of welding is 0.6-1.2m/min, hot spot chi
Very little 1.8-2.8mm.
So, by controlling laser facula size, it is ensured that transition metal powder is good with bevel for welding fusion, and
Stable transition zone is formed with titanium alloy side and steel side metal, suppress the generation of compound between hard brittle metal, it is ensured that welding point
Obdurability.
Further, step 5 of the present invention) in carry out the filling out of steel metal layer of titanium steel multiple tube using metal arc welding
Welding is filled, welding wire used is CHW-62GX, and welding parameter used is：Welding current is 100-160A, and voltage is 16-20V, to do
Elongation 8-12mm, speed of welding is 0.6-0.9m/min.
Find through lot of experiments, can prevent filler metal from being formed between metal through transition zone using above welding parameter and change
Compound；While heat input when reducing the welding of steel metal layer, reduces the scaling loss of alloying element, reduces heat affected area width, protect
The toughness of card weld seam；Welding deformation and welding residual stress can additionally be reduced.
Further, step 5 of the present invention) carried out using metal arc welding titanium steel multiple tube steel metal layer filling
In welding, for titanium steel multiple tube of the steel metal thickness degree more than 3mm using multilayer welding filling welding.
It is to prevent the excessive arc force of parameter from contacting shape to the impact of transition metal with titanium alloy layer during the welding of steel metal layer
Become intermetallic compound, while thick plates are more than 3mm in order to ensure loading and control heat input for steel metal thickness degree
Titanium steel multiple tube need to carry out multilamellar welding using little welding parameter.
Further, step 5 of the present invention) in the welding process of transition zone and capping layer and postwelding cooling procedure in, adopt
Carried out with weld metal of high-purity argon gas of the purity not less than 99.999% to weld metal zone, heat affected area and temperature higher than 295 DEG C
Protection.
Protection to weld seam and peripheral region can mainly prevent high-temperature titanium alloy and transition metal oxidized, cause weldering
Connect defect；Further, since titanium has very strong chemical activity at high temperature, titanium quickly inhales hydrogen more than 300 DEG C, more than 600 DEG C
Quick oxygen uptake, more than 700 DEG C are quickly inhaled nitrogen.Find through test, be higher than 295 DEG C to temperature in welding process and postwelding cooling procedure
Region carry out protection and with effective protection titanium alloy, chemical reaction can not occur.
With reference to the accompanying drawings and detailed description the present invention is described in further details.
Description of the drawings
Fig. 1 is the bevel for welding design drawing of embodiment of the present invention titanium steel multiple tube full penetration.
Fig. 2 is the titanium steel multiple tube schematic diagram after the embodiment of the present invention processes bevel for welding.
Fig. 3 is embodiment of the present invention titanium steel multiple tube titanium alloy layer welding schematic diagram.
Fig. 4 is embodiment of the present invention titanium steel multiple tube transition zone LASER BEAM WELDING schematic diagram.
Fig. 5 is the weld joint schematic diagram of embodiment of the present invention titanium steel multiple tube postwelding.
In figure, d1For steel metal thickness degree, d2For titanium alloy layer thickness (root face size), θ is the both sides bevel for welding child's hair twisted in a knot-childhood
Degree, a is flat groove base width；1.1 is steel metal layer, and 1.2 is titanium alloy layer, and 2.1 is bevel for welding, and 2.2 is preset
Transition metal powder, 3.1 is laser beam used during welding titanium alloy layer, and 3.2 is laser beam used during welding transition layer, 4.1
For titanium alloy layer weld seam, 4.2 is transition zone weld seam, and 4.3 is steel metal layer weld seam.
Specific embodiment
Embodiment one
A kind of specific embodiment of the present invention is：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, comprise the following steps：
1), bevel for welding is processed：In the flat trapezoidal groove of the tube end maching with root face of titanium steel multiple tube to be welded, described flat
The titanium alloy layer of titanium steel multiple tube to be welded is close on the base of base slope mouth, root face a size of titanium alloy layer thickness；The bevel angle
For unilateral 15-20 °, groove base a size of 1.4-2.4mm；Fig. 1 is this example bevel for welding design drawing, and Fig. 2 is that this example is processed
Titanium steel multiple tube schematic diagram after bevel for welding；
2), welding region is cleared up：The groove of titanium steel multiple tube to be welded and region to be welded is cleared up, cut-back region should be not less than slope
The 15mm at mouth edge, removes impurity removing and oxide-film, then treats welding zone with alcoholic solution cleaning and treats around welding zone, organics removal
Impurity, can reduce be mingled with welding, the generation of the defect such as pore, it is ensured that welding quality；
3), the bottoming welding of titanium alloy layer：Using method for laser welding, the titanium alloy layer of titanium steel multiple tube is welded；
Before welding, first titanium steel multiple tube is preheating to 100-120 DEG C；It is not less than using purity in welding process and postwelding cooling procedure
Weld metal of 99.999% high-purity argon gas to weld metal zone, heat affected area and temperature higher than 295 DEG C is protected；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 the transition metal powder system of mix homogeneously
Become pasty state, be uniformly filled in through step 3) bottoming welding after titanium steel multiple tube to be welded groove bottom, packed layer thickness
For 1.5-2mm, compression guarantees tight, and carries out drying and processing；The transition metal powder is by following percentage by weight group
Become：Niobium 10-20%, vanadium 30-40%, beryllium 30-40%, copper 10-20%, said components percentage by weight sum is 100%；
5), the welding of transition zone and capping layer：Laser is used to melt step 4 as thermal source) preset metal dust so as to
Fuse to form transition zone with titanium alloy layer, its concrete operations requirement is：When laser spot position is adjusted during welding should make hot spot chi
The very little Breadth Maximum more than transition zone filler metal, melts preset metal dust using laser energy and forms transition zone, while protecting
Card sidewall fusion is good, and welding parameter used is：Laser power 2.0-2.5kW, speed of welding is 0.6-1.2m/min, hot spot chi
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, is formed capping layer, is melted
It is CHW-62GX to change pole electrical arc weldering welding wire used, and welding parameter used is：Welding current is 100-160A, and voltage is 16-
20V, stem elongation 8-12mm, speed of welding is 0.6-0.9m/min；Titanium steel multiple tube of the steel metal thickness degree more than 3mm is adopted
With multilayer welding filling welding.
In this example in the welding process and postwelding cooling procedure of transition zone and capping layer, it is not less than using purity
Weld metal of 99.999% high-purity argon gas to weld metal zone, heat affected area and temperature higher than 295 DEG C is protected, welding gas
Protect as 20L/min.
Fig. 5 is illustrated, the weld joint schematic diagram of the present embodiment titanium steel multiple tube postwelding.
Embodiment two
Another kind of specific embodiment of the present invention is：A kind of titanium steel multiple tube (titanium alloy layer 3mm+ steel metal layer 3-
8mm, is obtained by milling method) single face welding and double face shaping welding method, comprise the following steps：
1), bevel for welding is processed：On the 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, root face a size of titanium alloy layer thickness are close in the base of mouth；The bevel angle is single
15-20 ° of side, groove base a size of 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 is cleared up, cut-back region should be not less than slope
The 15mm at mouth edge, removes impurity removing and oxide-film, then treats welding zone with alcoholic solution cleaning and treats around welding zone, organics removal
Impurity, can reduce be mingled with welding, the generation of the defect such as pore, it is ensured that welding quality；
3), the bottoming welding of titanium alloy layer：Using method for laser welding, the titanium alloy layer of titanium steel multiple tube is welded；
Before welding, first titanium steel multiple tube is preheating to 100-120 DEG C；It is not less than using purity in welding process and postwelding cooling procedure
Weld metal of 99.999% high-purity argon gas to weld metal zone, heat affected area and temperature higher than 295 DEG C is protected；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 the transition metal powder system of mix homogeneously
Become pasty state, be uniformly filled in through step 3) bottoming welding after titanium steel multiple tube to be welded groove bottom, packed layer thickness
For 1.5-2mm, compression guarantees tight, and carries out drying and processing；The transition metal powder is by following percentage by weight group
Become：Niobium 10-20%, vanadium 30-40%, beryllium 30-40%, copper 10-20%, said components percentage by weight sum is 100%；
5), the welding of transition zone and capping layer：Laser is used to melt step 4 as thermal source) preset metal dust so as to
Fuse to form transition zone with titanium alloy layer, its concrete operations requirement is：When laser spot position is adjusted during welding should make hot spot chi
The very little Breadth Maximum more than transition zone filler metal, melts preset metal dust using laser energy and forms transition zone, while protecting
Card sidewall fusion is good, and welding parameter used is：Laser power 2.0-2.5kW, speed of welding is 0.6-1.2m/min, hot spot chi
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, is formed capping layer, is melted
It is CHW-62GX to change pole electrical arc weldering welding wire used, and welding parameter used is：Welding current is 100-160A, and voltage is 16-
20V, stem elongation 8-12mm, speed of welding is 0.6-0.9m/min；Titanium steel multiple tube of the steel metal thickness degree more than 3mm is adopted
With multilayer welding filling welding.
In this example in the welding process and postwelding cooling procedure of transition zone and capping layer, it is not less than using purity
Weld metal of 99.999% high-purity argon gas to weld metal zone, heat affected area and temperature higher than 295 DEG C is protected, welding gas
Protect as 20L/min.
Claims (8)
1. a kind of titanium steel multiple tube single face welding and double face shaping welding method, comprises the following steps：
1), bevel for welding is processed：In the 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, root face a size of titanium alloy layer thickness；
2), welding region is cleared up：Clear 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：Using method for laser welding, the titanium alloy layer of titanium steel multiple tube is welded；
4), preset transition metal powder：Use acetone as bonding agent and the transition metal powder of mix homogeneously is made paste
Shape, is uniformly filled in through step 3) the groove bottom of titanium steel multiple tube to be welded after bottoming welding, packed layer thickness is
1.5-2mm, compresses and carries out drying and processing；The transition metal powder is made up of following percentage by weight：Niobium 10-20%,
Vanadium 30-40%, beryllium 30-40%, copper 10-20%, said components percentage by weight sum is 100%；
5), the welding of transition zone and capping layer：Laser is used to melt step 4 as thermal source) preset metal dust so as to 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.
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：Described
Step 1) in the flat groove with root face of processing be the flat trapezoidal groove with root face, its bevel angle is unilateral 15-20 °,
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：Described
Step 3) using method for laser welding, the titanium alloy layer of titanium steel multiple tube is welded before, first titanium steel multiple tube is preheating to
100-120℃；High-purity argon gas in welding process and postwelding cooling procedure using purity not less than 99.999% are to weld metal zone, warm
The weld metal of the zone of influence and temperature higher than 295 DEG C is protected.
4. a kind of titanium steel multiple tube single face welding and double face shaping welding method according to claim 1 or 3, it is characterised in that：
The step 3) welding parameter titanium alloy layer of titanium steel multiple tube welded using method for laser welding is：Laser power
2.0-3.0kW, laser focal 300mm, speed of welding 1.5-2.0m/min, heat input is：Q=65-75J/mm.
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：Described
Step 5) used in laser melt step 4 as thermal source) preset transition metal powder so as to fuse to be formed with titanium alloy layer
The concrete operations of transition zone are required：Should make spot size more than preset transition zone gold when laser spot position is adjusted during welding
The Breadth Maximum of category powder, melts preset metal dust using laser energy and forms transition zone, while ensure that sidewall fusion is good,
Welding parameter used is：Laser power 2.0-2.5kW, speed of welding is 0.6-1.2m/min, spot size 1.8-2.8mm.
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：Described
Step 5) in carried out using metal arc welding titanium steel multiple tube steel metal layer filling welding, welding wire used be
62GX, welding parameter used is：Welding current is 100-160A, and voltage is 16-20V, stem elongation 8-12mm, and speed of welding is
0.6-0.9m/min.
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：Described
Step 5) carried out using metal arc welding titanium steel multiple tube steel metal layer filling welding in, big for steel metal thickness degree
Welded using multilayer welding filling in the titanium steel multiple tube of 3mm.
8. 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：Described
Step 5) in the welding process of transition zone and capping layer and postwelding cooling procedure, using high-purity argon of the purity not less than 99.999%
Weld metal of the gas to weld metal zone, heat affected area and temperature higher than 295 DEG C is protected.
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