CN106346255A - Laser welding machine provided with on-line continuous heat-treatment for welding seam - Google Patents
Laser welding machine provided with on-line continuous heat-treatment for welding seam Download PDFInfo
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- CN106346255A CN106346255A CN201510415841.3A CN201510415841A CN106346255A CN 106346255 A CN106346255 A CN 106346255A CN 201510415841 A CN201510415841 A CN 201510415841A CN 106346255 A CN106346255 A CN 106346255A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P23/00—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
- B23P23/04—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass for both machining and other metal-working operations
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
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Abstract
The invention discloses a laser welding machine provided with on-line continuous heat-treatment for welding seam. The laser welding machine comprises a welding trolley, and the welding trolley is provided with a pre-heating device and a heat-treatment device, a shearing device, a laser welding device and a rolling device. The next step of welding process is the brittleness treatment process whose position is provided with a brittleness treatment devise. The brittleness treatment devise comprises an auxiliary engine trolley and a water tank, an annealing mechanism and a circulating water cooler, which are arranged on the auxiliary engine trolley in sequence. A rapid cooling sprayer which is used to cool rapidly the front and back of on-line strip steel welding area, is arranged on each position in the water tank and above the auxiliary engine trolley. The rapid cooling sprayer is communicated with the output port of the circulating water cooler. The water tank is communicated with the input port of the circulating water cooler. The heat-treatment device comprises a normalizing mechanism and a tempering mechanism. The normalizing mechanism is provided between the welding devise and the rolling device, and the tempering mechanism is arranged at the rear of the rolling device. The laser welding machine provided with on-line continuous heat-treatment for welding seam is suitable for welding machines.
Description
Technical field
The present invention relates to welding field, particularly to a kind of Laser Welding with on-line continuous weld seam heat treatment
Machine.
Background technology
With China's automobile, bridge, building, household electrical appliances etc., iron and steel is had wilderness demand industry swift and violent
Development, iron and steel enterprise requires also more and more higher to the yield and quality of high standard and the steel of high performance-price ratio.
At present, most domestic iron and steel enterprise gradually moves towards product transformation, the trend of equipment upgrading.Therefore,
The welding of special rolling-mill section is the significant problem that we will face, but basic using common laser welder
Special substance steel grade, particularly 400 series stainless steels, high strength alloy steel and high-phosphorus iron ore cannot be met
Deng welding requirements, specifically:
1st, because laser welding is that the laser beam of high-energy-density is transmitted in the strip steel gap spliced
On, make welded piece moment be heated up to 1200～1400 DEG C and realize rapid welding, so this welding process
Welding region temperature can be made suddenly to rise, decline, cause weld dimensions to form quenching, and warp
Cross the weld dimensions after quenching irregular thick crystallization can substantially occur (particularly 400 are
Row rustless steel, high strength alloy steel and high-phosphorus iron ore etc.), so, weld dimensions are once stress just
Fracture occurs；
2nd, because welding region is larger with temperature difference during welding before welding, so easy produce welding
Stress, meanwhile, because weld strain speed is higher, so easily produce weld crack and because of weld metal
The effusion of middle diffusible hydrogen and the hydrogen induced cracking that leads to, and, weld dimensions harden degree relatively
High.
Content of the invention
The invention aims to overcoming the shortcomings of above-mentioned background technology, provide a kind of weld seam extensibility
The good laser welder with on-line continuous weld seam heat treatment.
In order to realize object above, a kind of laser with on-line continuous weld seam heat treatment that the present invention provides
Welding machine, including welding tractor, and is sequentially arranged at shear on described welding tractor, laser
Welder and Roller compaction device, the position in front of corresponding described laser soldering device on described welding tractor
It is provided with the preheating device that welding region can be carried out with on-line continuous intensification preheating, described preheating device arrangement
Between described shear and laser soldering device, corresponding described laser welding on described welding tractor
The position at device rear is provided with the heat treatment dress that welded seam area can be carried out with on-line continuous weld seam heat treatment
Put；
The lower step operation of the welding sequence of described laser welder is fragility treatment process, science and engineering at this fragility
The position of sequence is provided with fragility processing meanss, and described fragility processing meanss include subsidiary engine dolly and successively
It is arranged in water box on described subsidiary engine dolly, annealing mechanism and circulation water refrigerating machine, described water box
Position above corresponding described water box on interior and described subsidiary engine dolly is respectively provided with and is rapidly cooled in
The rapidly cooling spray of the welding region positive and negative of tape steel, described rapidly cooling spray and described circulation
The delivery outlet connection of water refrigerating machine, described water box is connected with the input port of described circulation water refrigerating machine；
Described annealing device includes described welded seam area can be carried out with on-line continuous weld seam normalized treatment
Normalizing mechanism and the tempering mechanism that described welded seam area can be carried out with on-line continuous weld seam temper, institute
State normalizing mechanism to be arranged between described laser soldering device and Roller compaction device, described tempering arrangement of mechanism
At described Roller compaction device rear.
By before weldering, the preheating that heats up is carried out to welding region, so, both can reduce welding stress, and might be used again
Reduce weld strain speed, be conducive to the effusion avoiding producing diffusible hydrogen in weld crack and weld metal,
Avoid producing hydrogen induced cracking, also can reduce the degree of hardening of weld dimensions meanwhile, and,
Also there is assosting effect to the rate of cooling slowing down postwelding；And by postwelding, welded seam area is carried out at heat
Reason, so, can make the thick crystallization diffusion of weld dimensions and refine, thus greatly improving
The extensibility of weld seam；
First, normalized treatment is carried out to welded seam area by postwelding, so, weld seam and heat affecting can be made
The thick crystallization diffusion in area and refinement, thus greatly increase the extensibility of weld seam；Then, spread
Become even closer with the crystallization after refinement after Roller compaction device spreading, thus further improve
The extensibility of weld seam；Finally, welded seam area, after temper, is destroyed by Roller compaction device spreading
Refinement crystal crystallizes, again thus yet further improve the extensibility of weld seam；
Spy is directed to 400 series stainless steels, by adding fragility in the lower step procedure position of welding sequence
Processing meanss, and process replacement temper with fragility, so can eliminate the crisp of 400 series stainless steels
Property, thus further increasing plasticity and the extensibility of 400 series stainless steels.
Above-mentioned fragility treatment process is to design particular for 400 series stainless steels although 400 are
Arrange stainless weld seam and can improve certain extensibility after the heat treatment before spreading, but due to 400
It is that rustless steel has its own feature (ferrite and ferrum element～Ovshinsky two-phase body), therefore, 400 series are stainless
After the heat treatment before spreading, welded seam area is still because metal structure is influenced by heat (temperature the weld seam of steel
Degree declines) and form weld seam fragility.Therefore need using rapidly being cooled down to weld seam, annealing heating,
Rapidly cool down again goes fragility technique, could solve brittleness problems, thus meet this steel grade pickling,
Ductile strength in the operation of rolling requires.
Specifically, 400 is that rustless steel heats (600～800 DEG C) and after rolling in normalizing, at a temperature of
Fall simultaneously through 400～550 DEG C of regions and can stop certain time, now easily 475 DEG C of friable tissues,
Weld strength is made to reduce it is impossible to meet production requirement.For solving this problem it is necessary to enter to welded seam area
Row annealing heating (500～650 DEG C), then rapidly cooling makes weld seam temperature decline rapidly, quickly again
Departing from 475 DEG C of fragility warm areas, thus can eliminating its fragility, thus improving plastic property of weld bead and extensibility.But
Due to normalizing heating (600～800 DEG C) and after rolling, weld seam temperature decline has uncertainty, can
Can fall into 400～550 DEG C of regions it is also possible to fall into 550～650 DEG C of regions, need to move back for the former
Fire heating quenching again, only needs chilling for the latter, increased again therefore to temperature detection and control
Polygamy, also makes reliability reduce, cost also can accordingly increase, for this reason, we adopt unified approach,
That is: after having rolled, weld seam unification is rapidly cooled and makes temperature be down to room temperature, then as
Starting point, re-annealing heating (500～650 DEG C) is simultaneously rapidly cooled to room temperature.
In such scheme, described normalizing mechanism includes a normalizing mechanism and secondary normalizing mechanism again,
Described secondary normalizing arrangement of mechanism is at a described normalizing mechanism rear.By postwelding, welded seam area is entered
Normalizing of row, can make the thick crystalline solid of weld dimensions be spread, and so that it is distributed all
Even, keep weld dimensions uniform temperature to prepare for secondary normalizing simultaneously；Followed by two
Secondary normalizing, can make weld dimensions texture refine, simultaneously through double normalizing, make fabric width
The strip welded seam area temperature of >=1000mm than more uniform, balance, thus create a further reduction weld seam
And the degree of hardening of heat affected area, improve metal extensibility.
In such scheme, the heating-up temperature of described preheating device is 100～200 DEG C, a described normalizing
The heating-up temperature of mechanism is 600～800 DEG C, and the heating-up temperature of described secondary normalizing mechanism is 600～800 DEG C,
The heating-up temperature of described tempering mechanism is 200～300 DEG C.By the strip steel according to concrete different model, excellent
Change and select different interval preheating temperatures, normalizing temperature, secondary normalizing temperature and temperature,
The extensibility of weld seam can further be improved.
In such scheme, the heating-up temperature of described annealing mechanism is 500～650 DEG C.
In such scheme, described annealing mechanism adopts high frequency induction heater.
In such scheme, described preheating device, normalizing mechanism, secondary normalizing mechanism and tempering
Mechanism is all using high frequency induction heater.
In such scheme, the end face of the rolling wheel of described Roller compaction device is circular arc.By adopting end
Face is the rolling wheel of circular arc, can make force localization when rolling in welded seam area, so as to more preferable
Destroy crystallization after normalizing so as to even closer.
The technical scheme that the present invention provides has the benefit that
1st, by before weldering, the preheating that heats up is carried out to welding region, so, both can reduce welding stress, and
Weld strain speed can be reduced, be conducive to the ease avoiding producing diffusible hydrogen in weld crack and weld metal
Go out, it is to avoid produce hydrogen induced cracking, also can reduce the degree of hardening of weld dimensions meanwhile, and
And, also there is assosting effect to the rate of cooling slowing down postwelding；And by postwelding, welded seam area is carried out
Heat treatment, so, can make the thick crystallization diffusion of weld dimensions and refine, thus greatly
Improve the extensibility of weld seam；
2nd, first, normalized treatment is carried out to welded seam area by postwelding, so, weld seam and hot shadow can be made
Ring the thick crystallization diffusion in area and refine, thus greatly increasing the extensibility of weld seam；Then, expand
Crystallization after dissipating and refining becomes even closer, thus further improving after Roller compaction device spreading
The extensibility of weld seam；Finally, welded seam area, after temper, is destroyed by Roller compaction device spreading
Refinement crystal crystallize again, thus yet further improve the extensibility of weld seam；
3rd, a normalizing is carried out by postwelding to welded seam area, the thick knot of weld dimensions can be made
Crystal is spread, and so that it is evenly distributed, and keeps weld dimensions uniform temperature to be two simultaneously
Secondary normalizing is prepared；Followed by secondary normalizing, weld dimensions texture can be made to refine,
Simultaneously through double normalizing, make the strip welded seam area temperature of fabric width >=1000mm than more uniform, balance,
Thus create a further reduction the degree of hardening of weld dimensions, improve metal extensibility；
4th, pass through according to the strip steel of concrete different model, the different interval preheating temperature of optimized choice,
Secondary normalizing temperature, secondary normalizing temperature and temperature, can further improve the extensibility of weld seam；
5th, passing through using end face is the rolling wheel of circular arc, can make force localization when rolling in weld seam
Region, destroys the crystallization after normalizing so as to even closer so as to more preferable；
6th, spy is directed to 400 series stainless steels, crisp by adding in the lower step procedure position of welding sequence
Property processing meanss, and with fragility process substitute temper, so can eliminate 400 series stainless steels
Fragility, thus further increasing plasticity and the extensibility of 400 series stainless steels.
The present invention has that structure is simple, on-line continuous can carry out heat treatment, work to welding region and weld seam
Skill is simple, be welded rear weld dimensions good-extensibility the features such as.
Brief description
Fig. 1 is the structural representation of welding portion in the present invention；
Fig. 2 is the structural representation of subsidiary engine part in the present invention；
Fig. 3 is the side structure schematic view of Fig. 2.
In figure, welding tractor 1, shear 2, laser soldering device 3, Roller compaction device 4, preheating
Device 5, annealing device 6, normalizing mechanism 6a, a normalizing mechanism 6a1, secondary normalizing mechanism 6a2,
Tempering mechanism 6b, fragility processing meanss 7, subsidiary engine dolly 7a, water box 7b, annealing mechanism 7c, follow
Ring water refrigerating machine 7d, rapidly cooling spray 7e.
Specific embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to this
Invention embodiment is described in further detail.
This welding machine includes two large divisions: welding portion (i.e. label part 1～6) and subsidiary engine part (are marked
Number part 7)；Accordingly, its welding procedure includes welding sequence and fragility treatment process two large divisions.
Embodiment 1:
A kind of laser welder with on-line continuous weld seam heat treatment, including welding tractor 1, and pacifies successively
It is contained in shear 2 on described welding tractor 1, laser soldering device 3 and Roller compaction device 4, described
On welding tractor 1, the position in the described laser soldering device of correspondence 3 front is provided with and welding region can be carried out
The preheating device 5 of on-line continuous intensification preheating, described preheating device 5 is arranged in described shear 2 He
Between laser soldering device 3, corresponding described laser soldering device 3 rear on described welding tractor 1
Position is provided with the annealing device 6 that welded seam area can be carried out with on-line continuous weld seam heat treatment.Before weldering
Welding region is carried out with the preheating that heats up, so, both can reduce welding stress, weld strain can be reduced again
Speed, is conducive to the effusion avoiding producing diffusible hydrogen in weld crack and weld metal, it is to avoid produce hydrogen
Fracturing stricture of vagina, also can reduce the degree of hardening of weld dimensions meanwhile, and, also to slowing down weldering
Rate of cooling afterwards has assosting effect；And heat treatment is carried out to welded seam area by postwelding, so,
The thick crystallization diffusion of weld dimensions can be made and refine, thus greatly increasing prolonging of weld seam
Stretching property.
Above-mentioned annealing device 6 includes described welded seam area can be carried out with on-line continuous weld seam normalized treatment
Normalizing mechanism 6a and described welded seam area can be carried out with the tempering mechanism of on-line continuous weld seam temper
6b, described normalizing mechanism 6a is arranged between described laser soldering device 3 and Roller compaction device 4, described
Tempering mechanism 6b is arranged in described Roller compaction device 4 rear.First, by postwelding, welded seam area is carried out
Normalized treatment, so, can make the thick crystallization diffusion of weld dimensions and refine, thus significantly
Improve the extensibility of weld seam；Then, the crystallization after spreading and refine is after Roller compaction device 4 spreading
Become even closer, thus further improve the extensibility of weld seam；Finally, welded seam area warp
After crossing temper, the refinement crystal being destroyed by Roller compaction device 4 spreading crystallizes again, thus entering one again
Improve to step the extensibility of weld seam.Described normalizing mechanism 6a includes a normalizing mechanism 6a1 and two again
Secondary normalizing mechanism 6a2, described secondary normalizing mechanism 6a2 are arranged in a described normalizing mechanism 6a1 rear.
Normalizing is carried out by postwelding to welded seam area, the thick crystalline solid of weld dimensions can be made to obtain
To diffusion, and so that it is evenly distributed, keep weld dimensions uniform temperature to be secondary normalizing simultaneously
Prepare；Followed by secondary normalizing, weld dimensions texture can be made to refine, simultaneously
Through double normalizing, make the strip welded seam area temperature of fabric width >=1000mm than more uniform, balance, from
And create a further reduction the degree of hardening of weld dimensions, improve metal extensibility.
The heating-up temperature of above-mentioned preheating device 5 is 100～200 DEG C, and a described normalizing mechanism 6a1 adds
Hot temperature is 600～800 DEG C, and the heating-up temperature of described secondary normalizing mechanism 6a2 is 600～800 DEG C, institute
The heating-up temperature stating tempering mechanism 6b is 200～300 DEG C.By the strip steel according to concrete different model,
The different interval preheating temperature of optimized choice, normalizing temperature, secondary normalizing temperature and temperature,
The extensibility of weld seam can further be improved.Described 5, normalizing mechanism 6a1 of preheating device, two
Secondary normalizing mechanism 6a2 and tempering mechanism 6b all using high frequency induction heater, described Roller compaction device 4
The end face of rolling wheel is circular arc.Certainly, other heaters may also be employed.By being circle using end face
The rolling wheel of arc, can make force localization when rolling in welded seam area, destroy so as to more preferable
Crystallization after normalizing is so as to even closer.
The lower step operation of the welding sequence of above-mentioned laser welder is fragility treatment process, science and engineering at this fragility
The position of sequence is provided with fragility processing meanss 7, described fragility processing meanss 7 include subsidiary engine dolly 7a with
And it is sequentially arranged in water box 7b, the annealing mechanism 7c on described subsidiary engine dolly 7a and recirculated water refrigeration
Position in machine 7d, described water box 7b and above corresponding described water box 7b on described subsidiary engine dolly 7a
Put the rapidly cooling spray 7e being respectively provided with the welding region positive and negative being rapidly cooled in tape steel,
Described rapidly cooling spray 7e is connected with the delivery outlet of described circulation water refrigerating machine 7d, described water box
7b is connected with the input port of described circulation water refrigerating machine 7d, and the heating-up temperature of described annealing mechanism 7c is
500～650 DEG C, described annealing mechanism 7c adopts high frequency induction heater.Special stainless for 400 series
Steel, by adding fragility processing meanss 7 in the lower step procedure position of welding sequence, and is processed with fragility
Substitute temper, so can eliminate the fragility of 400 series stainless steels, thus further increasing
The plasticity of 400 series stainless steels and extensibility.
, by welding region is carried out before weldering with the preheating that heats up, so, both can reduce welding should for the present embodiment
Power, can reduce weld strain speed again, be conducive to avoiding producing in weld crack and weld metal spreading
The effusion of hydrogen, it is to avoid produce hydrogen induced cracking, also can reduce the journey of hardening of weld dimensions meanwhile
Degree, and, also there is assosting effect to the rate of cooling slowing down postwelding；And by postwelding to weld metal zone
Domain carries out heat treatment, so, can make the thick crystallization diffusion of weld dimensions and refine, thus
Greatly increase the extensibility of weld seam；First, normalized treatment is carried out to welded seam area by postwelding,
So, the thick crystallization diffusion of weld dimensions can be made and refine, thus greatly increasing weldering
The extensibility of seam；Then, the crystallization after spreading and refine becomes more to step up after Roller compaction device 4 spreading
Close, thus further improve the extensibility of weld seam；Finally, welded seam area is through temper
Afterwards, the refinement crystal being destroyed by Roller compaction device 4 spreading crystallizes again, thus yet further improve
The extensibility of weld seam；Normalizing is carried out to welded seam area by postwelding, weld dimensions can be made
Thick crystalline solid spread, and so that it is evenly distributed, keep weld dimensions certain simultaneously
Temperature is prepared for secondary normalizing；Followed by secondary normalizing, weld dimensions crystal can be made
Structure refinement, simultaneously through double normalizing, makes the strip welded seam area temperature of fabric width >=1000mm compare
Uniformly, balancing, thus create a further reduction the degree of hardening of weld dimensions, improve gold
Belong to extensibility；By the strip steel according to concrete different model, the different interval preheating temperature of optimized choice,
Normalizing temperature, secondary normalizing temperature and temperature, can further improve the extension of weld seam
Property；By being the rolling wheel of circular arc using end face, force localization when rolling can be made in weld metal zone
Domain, destroys the crystallization after normalizing so as to even closer so as to more preferable；Special serial for 400
Rustless steel, by adding fragility processing meanss 7 in the lower step procedure position of welding sequence, and uses fragility
Processing and substitute temper, so eliminating the fragility of 400 series stainless steels, thus further carrying
The high plasticity of 400 series stainless steels and extensibility.
Embodiment 2 (for high strength alloy steel and high-phosphorus iron ore etc., certainly, also may be used by 400 series stainless steels
Using the scheme of the present embodiment, but it is also easy to produce fragility):
A kind of laser welding process with on-line continuous weld seam heat treatment, comprises the following steps:
1) online strip steel carries out shearing piece by shear 2 on the shearing station of welding sequence；
2), after shearing piece finishes, the welding region of described online strip steel is in the preheating of described welding sequence
On station, on-line continuous intensification is carried out by preheating device 5 and be preheated to 100～200 DEG C；
3) heat up after preheating, described online strip steel passes through laser on the welding post of described welding sequence
Welder 3 is welded；
After 4a1) welding finishes, the welded seam area of described online strip steel in described welding sequence once just
On firer position, the normalizing of on-line continuous weld seam is carried out by a normalizing mechanism 6a1, this normalizing
Temperature is 600～800 DEG C；
After 4a2) normalizing finishes, the welded seam area of described online strip steel is the two of described welding sequence
On secondary normalizing station, on-line continuous weld seam secondary normalizing is carried out by secondary normalizing mechanism 6a2, this is secondary
Normalizing temperature is 600～800 DEG C；
After 4b) normalized treatment finishes, the welded seam area of described online strip steel is in the rolling of described welding sequence
On pressure station, on-line continuous weld seam spreading is carried out by Roller compaction device 4；
After 4c) spreading finishes, the welded seam area of described online strip steel is in the Temperer of described welding sequence
Carry out on-line continuous weld seam temper by being tempered mechanism 6b, this temper temperature is on position
200～300 DEG C.
Above-mentioned preheating device 5, normalizing mechanism 6a1, a secondary normalizing mechanism 6a2 and tempering mechanism 6b
All using high frequency induction heater, the end face of the rolling wheel of described Roller compaction device 4 is circular arc.Certainly,
Other heater may also be employed.By being the rolling wheel of circular arc using end face, work when rolling can be made
Firmly concentrate on welded seam area, destroy the crystallization after normalizing so as to even closer so as to more preferable.
The present embodiment passes through to add before welding post and the welding region of online strip steel can be carried out heat up in advance
The preheating station of heat, so, both can reduce welding stress, can reduce weld strain speed, favorably again
In the effusion avoiding diffusible hydrogen in generation weld crack and weld metal, it is to avoid produce hydrogen induced cracking, with
When, also can reduce the degree of hardening of weld dimensions, and, also to the cooling speed slowing down postwelding
Degree has assosting effect；And the welded seam area of online strip steel can be carried out by adding after welding post
The heat treatment station of heat treatment, so, can make the thick crystallization diffusion of weld dimensions and refine,
Thus greatly increasing the extensibility of weld seam；First, welded seam area is adopted at the heat of normalizing process
Reason, so, can make the thick crystallization diffusion of weld dimensions and refine, thus greatly improving
The extensibility of weld seam；Then, to the crystallization after diffusion and refinement using roll milling craft so as to become
Even closer, thus further improve the extensibility of weld seam；Finally, welded seam area is adopted
The heat treatment of tempering process, makes the refinement crystal being destroyed by spreading crystallize again, thus yet further
Improve the extensibility of weld seam；By postwelding, welded seam area is first adopted with the heat treatment of a normalizing, can
So that the thick crystalline solid of weld dimensions is spread, and so that it is evenly distributed, keep weldering simultaneously
Seam and heat affected area uniform temperature are prepared for secondary normalizing；Adopt two followed by welded seam area
The heat treatment of secondary normalizing, can make weld dimensions texture refine, simultaneously through double normalizing,
Make the strip welded seam area temperature of fabric width >=1000mm than more uniform, balance, thus further reducing
The degree of hardening of weld dimensions, improves metal extensibility；By according to concrete different shaped
Number strip steel, the different interval preheating temperature of optimized choice, normalizing temperature, a secondary normalizing temperature
And temperature, can further improve the extensibility of weld seam；By being circular arc using end face
Rolling wheel, can make force localization when rolling in welded seam area, destroy through normalizing so as to more preferable
Rear crystallization is so as to even closer.
Embodiment 3 (spy is directed to 400 series stainless steels):
A kind of laser welding process with on-line continuous weld seam heat treatment, comprises the following steps:
1) online strip steel carries out shearing piece by shear 2 on the shearing station of welding sequence；
2), after shearing piece finishes, the welding region of described online strip steel is in the preheating of described welding sequence
On station, on-line continuous intensification is carried out by preheating device 5 and be preheated to 100～200 DEG C；
3) heat up after preheating, described online strip steel passes through laser on the welding post of described welding sequence
Welder 3 is welded；
After 4a1) welding finishes, the welded seam area of described online strip steel in described welding sequence once just
On firer position, the normalizing of on-line continuous weld seam is carried out by a normalizing mechanism 6a1, this normalizing
Temperature is 600～800 DEG C；
After 4a2) normalizing finishes, the welded seam area of described online strip steel is the two of described welding sequence
On secondary normalizing station, on-line continuous weld seam secondary normalizing is carried out by secondary normalizing mechanism 6a2, this is secondary
Normalizing temperature is 600～800 DEG C；
After 4b) normalized treatment finishes, the welded seam area of described online strip steel is in the rolling of described welding sequence
On pressure station, on-line continuous weld seam spreading is carried out by Roller compaction device 4；
After 4c) spreading finishes, the welded seam area of described online strip steel is in the urgency of described fragility treatment process
In fast cooling station, room temperature is rapidly down to by described rapidly cooling spray 7e；
It is down to the lehr attendant in described fragility treatment process for the welded seam area of the described online strip steel after room temperature
Made annealing treatment by described annealing mechanism 7c on position, this annealing temperature is 500～650 DEG C；
The welded seam area of the described online strip steel after annealing is again in the rapidly cooling of described fragility treatment process
On station, room temperature is rapidly down to by described rapidly cooling spray 7e.
Specifically, the fragility processing meanss 7 on the position of above-mentioned fragility treatment process include subsidiary engine dolly
7a and be sequentially arranged in water box 7b, the annealing mechanism 7c on described subsidiary engine dolly 7a and recirculated water
In refrigeration machine 7d, described water box 7b and above corresponding described water box 7b on described subsidiary engine dolly 7a
Position be respectively provided with the rapidly cooling spray of the welding region positive and negative being rapidly cooled in tape steel
7e, described rapidly cooling spray 7e are connected with the delivery outlet of described circulation water refrigerating machine 7d, described are filled with water
Case 7b is connected with the input port of described circulation water refrigerating machine 7d.During initial position, weld seam is located at described
Above water box 7b, after rapidly cooling finishes for the first time, subsidiary engine dolly 7a is moved to the left, and makes annealing
Mechanism 7c is located at and is made annealing treatment below weld seam, after annealing finishes, subsidiary engine dolly 7a return to the right,
So that water box 7b is returned to below weld seam, finally rapidly cooled down for the second time again.
Above-mentioned preheating device 5, normalizing mechanism 6a1, a secondary normalizing mechanism 6a2 and annealing mechanism 7c
All using high frequency induction heater, the end face of the rolling wheel of described Roller compaction device 4 is circular arc.Certainly,
Other heater may also be employed.By being the rolling wheel of circular arc using end face, work when rolling can be made
Firmly concentrate on welded seam area, destroy the crystallization after normalizing so as to even closer so as to more preferable.
The present embodiment passes through to add before welding post and the welding region of online strip steel can be carried out heat up in advance
The preheating station of heat, so, both can reduce welding stress, can reduce weld strain speed, favorably again
In the effusion avoiding diffusible hydrogen in generation weld crack and weld metal, it is to avoid produce hydrogen induced cracking, with
When, also can reduce the degree of hardening of weld dimensions, and, also to the cooling speed slowing down postwelding
Degree has assosting effect；And the welded seam area of online strip steel can be carried out by adding after welding post
The heat treatment station of heat treatment, so, can make the thick crystallization diffusion of weld dimensions and refine,
Thus greatly increasing the extensibility of weld seam；By the lower step process step design of welding sequence is become fragility
Treatment process, so can eliminate the fragility of 400 series stainless steels, thus further increasing 400
The plasticity of series stainless steel and extensibility；First, welded seam area is adopted with the heat treatment of normalizing process,
So, the thick crystallization diffusion of weld dimensions can be made and refine, thus greatly increasing weldering
The extensibility of seam；Then, to the crystallization after diffusion and refinement using roll milling craft so as to become more
Closely, thus further improve the extensibility of weld seam；Finally, fragility is adopted to welded seam area
Process, eliminate the fragility of 400 series stainless steels, thus it is stainless yet further to improve 400 series
The plasticity of steel and extensibility；By postwelding, welded seam area is first adopted with the heat treatment of a normalizing, can make
The thick crystalline solid of weld dimensions is spread, and so that it is evenly distributed, and keeps weld seam simultaneously
And heat affected area uniform temperature prepares for secondary normalizing；Secondary followed by adopting to welded seam area
The heat treatment of normalizing, can make weld dimensions texture refine, simultaneously through double normalizing,
Make the strip welded seam area temperature of fabric width >=1000mm than more uniform, balance, thus further reducing
The degree of hardening of weld dimensions, improves metal extensibility；By being joined using annealing
Close the technique rapidly cooling down, eliminate 400 series stainless steels in 475 DEG C of interval friable tissues producing,
Thus further increasing plasticity and the extensibility of 400 series stainless steels；By before annealing
Rapidly cool down again plus once, ensured the technique when welding 400 series stainless steel and welding quality
Uniformity；By the strip steel according to concrete different model, the different interval preheating temperature of optimized choice,
Normalizing temperature, secondary normalizing temperature and temperature, can further improve the extension of weld seam
Property；By being the rolling wheel of circular arc using end face, force localization when rolling can be made in weld metal zone
Domain, destroys the crystallization after normalizing so as to even closer so as to more preferable.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this
Within bright spirit and principle, any modification, equivalent substitution and improvement made etc., should be included in
Within protection scope of the present invention.
Claims (7)
1. a kind of laser welder with on-line continuous weld seam heat treatment, including welding tractor (1), and
Be sequentially arranged at shear (2) on described welding tractor (1), laser soldering device (3) and
Roller compaction device (4) corresponds to described laser soldering device it is characterised in that described welding tractor (1) is upper
(3) position in front of is provided with the preheating device (5) that welding region can be carried out with on-line continuous intensification preheating,
Described preheating device (5) is arranged between described shear (2) and laser soldering device (3),
The position at upper corresponding described laser soldering device (3) rear of described welding tractor (1) is provided with can butt welding
Seam region carries out the annealing device (6) of on-line continuous weld seam heat treatment；
The lower step operation of the welding sequence of described laser welder is fragility treatment process, science and engineering at this fragility
The position of sequence is provided with fragility processing meanss (7), and described fragility processing meanss (7) include subsidiary engine dolly
(7a) and be sequentially arranged in water box (7b) on described subsidiary engine dolly (7a), annealing mechanism (7c)
Above correspond to described subsidiary engine dolly (7a) with circulation water refrigerating machine (7d), described water box (7b)
Position above described water box (7b) is respectively provided with the welding region being rapidly cooled in tape steel
The rapidly cooling spray (7e) of positive and negative, described rapidly cooling spray (7e) and described recirculated water refrigeration
The delivery outlet connection of machine (7d), described water box (7b) and described circulation water refrigerating machine (7d)
Input port connects；
Described annealing device (6) includes described welded seam area can be carried out at on-line continuous weld seam normalizing
The normalizing mechanism (6a) of reason and described welded seam area can be carried out with on-line continuous weld seam temper and return
Lighter structure (6b), described normalizing mechanism (6a) is arranged in described laser soldering device (3) and spreading
Between device (4), described tempering mechanism (6b) is arranged in described Roller compaction device (4) rear.
2. the laser welder with on-line continuous weld seam heat treatment as claimed in claim 1, its feature exists
In, described normalizing mechanism (6a) includes a normalizing mechanism (6a1) and secondary normalizing mechanism (6a2) again,
Described secondary normalizing mechanism (6a2) is arranged in described normalizing mechanism (6a1) rear.
3. the laser welder with on-line continuous weld seam heat treatment as claimed in claim 2, its feature exists
In the heating-up temperature of described preheating device (5) is 100～200 DEG C, a described normalizing mechanism (6a1)
Heating-up temperature be 600～800 DEG C, the heating-up temperature of described secondary normalizing mechanism (6a2) is 600～800
DEG C, the heating-up temperature of described tempering mechanism (6b) is 200～300 DEG C.
4. the laser welder with on-line continuous weld seam heat treatment as claimed in claim 3, its feature exists
In the heating-up temperature of described annealing mechanism (7c) is 500～650 DEG C.
5. the laser welder with on-line continuous weld seam heat treatment as claimed in claim 3, its feature exists
In described annealing mechanism (7c) adopts high frequency induction heater.
6. the laser welder with on-line continuous weld seam heat treatment as claimed in claim 2, its feature exists
In, described preheating device (5), normalizing mechanism (6a1), a secondary normalizing mechanism (6a2) with return
Lighter structure (6b) is all using high frequency induction heater.
7. the laser welder with on-line continuous weld seam heat treatment as claimed in claim 1, its feature exists
In the end face of the rolling wheel of described Roller compaction device (4) is circular arc.
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| CN201510415841.3A CN106346255A (en) | 2015-07-15 | 2015-07-15 | Laser welding machine provided with on-line continuous heat-treatment for welding seam |
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| CN201510415841.3A CN106346255A (en) | 2015-07-15 | 2015-07-15 | Laser welding machine provided with on-line continuous heat-treatment for welding seam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108193044A (en) * | 2018-02-09 | 2018-06-22 | 阿美科福斯特惠勒动力机械有限公司 | A kind of membrane wall pipe row welding is in line preheating and rear heat-treating machine |
-
2015
- 2015-07-15 CN CN201510415841.3A patent/CN106346255A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108193044A (en) * | 2018-02-09 | 2018-06-22 | 阿美科福斯特惠勒动力机械有限公司 | A kind of membrane wall pipe row welding is in line preheating and rear heat-treating machine |
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