CN104889555B - Electric resistance welder and welding technology with on-line continuous weld seam heat processing - Google Patents
Electric resistance welder and welding technology with on-line continuous weld seam heat processing Download PDFInfo
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- CN104889555B CN104889555B CN201510288661.3A CN201510288661A CN104889555B CN 104889555 B CN104889555 B CN 104889555B CN 201510288661 A CN201510288661 A CN 201510288661A CN 104889555 B CN104889555 B CN 104889555B
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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
- B23K11/00—Resistance welding; Severing by resistance heating
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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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/34—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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/36—Auxiliary equipment
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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
- B23P17/00—Metal-working operations, not covered by a single other subclass or another group in this subclass
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Abstract
The invention discloses an electric resistance welder with online continuous weld seam heat processing, which comprises a small welding vehicle, a cutting device, an electric resistance welder and a rolling device that are sequentially set on the small welding vehicle, wherein a preheat device is set on a position of the small welding vehicle corresponded with the front of the electric resistance welder; the preheat device is set between the cutting device and the electric resistance welder; a heat processing device is set on a position of the small welding vehicle corresponded with the back of the electric resistance welder; the invention also discloses an electric resistance welding technology with online continuous welding heat processing; the steps comprise that an online strip steel is cut and welded on a cutting station through the cutting device; after being cut and welded, the welding area of the online strip steel is preheated to rise in temperature on a preheating station through the preheat device; after being preheated, the online strip steel is welded on a welding station through the electric resistance welder; after welding is completed, heat processing and rolling are carried out to the weld seam area of the online strip steel on a preheat processing station and a rolling station respectively through the preheat processing device and the rolling device.
Description
Technical field
The present invention relates to welding field, more particularly to a kind of resistance welder with on-line continuous weld seam heat treatment and its welding
Technique.
Background technology
As China's automobile, bridge, building, household electrical appliances etc. have the fast development of the industry of wilderness demand, iron and steel enterprise to iron and steel
Industry 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
Product transformation, the trend of equipment upgrading are moved towards gradually.Therefore, the welding of special rolling-mill section is the significant problem that we will face,
But special substance steel grade, particularly 400 series stainless steels, height cannot be met at all using common resistance welder and welding procedure
The welding requirements of strength alloys steel and high-phosphorus iron ore etc., specifically：
1st, as temperature during resistance welding is very high, so this welding process can be such that welding region temperature suddenly goes up
Rise, decline, cause weld dimensions to form quenching, and not advising substantially can occur in the weld dimensions after quenching
Thick crystallization (particularly 400 series stainless steels, high strength alloy steel and high-phosphorus iron ore etc.) then, so, weld dimensions
Fracture occurs once the stress；
2nd, as welding region is larger with temperature difference during welding before welding, so welding stress is easily produced, meanwhile,
Because weld strain speed it is higher, so easily producing weld crack and caused hydrogen is caused because of the effusion of diffusible hydrogen in weld metal
Crackle, and, the degree of hardening of weld dimensions is higher.
The content of the invention
The invention aims to overcome the shortcomings of above-mentioned background technology, there is provided a kind of band of weld seam good-extensibility is online
The resistance welder of continuous weld heat treatment and its welding procedure.
In order to realize object above, a kind of resistance welder with on-line continuous weld seam heat treatment that the present invention is provided, including
Welding tractor, and shear, welder and the Roller compaction device being sequentially arranged on the welding tractor, the weldering
Connecing on dolly the position in front of the correspondence welder and be provided with can carry out on-line continuous and heat up preheating to welding region
Preheating device, the preheating device are arranged between the shear and welder, correspondence on the welding tractor
The position at the welder rear is provided with the annealing device that can carry out on-line continuous weld seam heat treatment to welded seam area.
By intensification preheating being carried out to welding region before weldering, so, welding stress can have both been reduced, and can reduce weld strain speed again, have
Beneficial to the effusion for avoiding diffusible hydrogen in generation weld crack and weld metal, it is to avoid produce hydrogen induced cracking, meanwhile, can also reduce weldering
Seam and the degree of hardening of heat affected area, and, also the rate of cooling to slowing down postwelding has assosting effect；And pass through postwelding butt welding
Seam region carries out heat treatment, so, can make the thick crystallization diffusion of weld dimensions and refine, so as to greatly increase
The extensibility of weld seam.
In such scheme, the annealing device includes to carry out the welded seam area at on-line continuous weld seam normalizing
The normalizing mechanism of reason and the tempering mechanism that on-line continuous weld seam temper can be carried out to the welded seam area, the normalizing mechanism
It is arranged between the welder and Roller compaction device, the tempering mechanism is arranged in the Roller compaction device rear.First,
Normalized treatment is carried out to welded seam area by postwelding, so, the thick crystallization diffusion of weld dimensions can be made and refined, from
And greatly increase the extensibility of weld seam；Then, the crystallization after spreading and refine becomes more to step up Jing after Roller compaction device spreading
It is close, so as to further improve the extensibility of weld seam；Finally, welded seam area is rolled over by Roller compaction device after temper
Crush bad refinement crystal to crystallize again, so as to yet further improve the extensibility of weld seam.
In such scheme, the normalizing mechanism includes a normalizing mechanism and secondary normalizing mechanism again, it is described it is secondary just
Lighter structure is arranged in normalizing mechanism rear.Normalizing is carried out by postwelding to welded seam area, weld seam and heat can be made
The thick crystalline solid of the zone of influence is spread, and makes which be evenly distributed, while keeping weld dimensions uniform temperature to be two
Secondary normalizing is prepared；Followed by secondary normalizing, refine can weld dimensions texture, while through twice just
Fire, makes the strip welded seam area temperature of fabric width >=1000mm than more uniform, balance, so as to create a further reduction weld seam and hot shadow
The degree of hardening in area is rung, metal extensibility is improve.
In such scheme, the heating-up temperature of the preheating device is 150～200 DEG C, and a normalizing mechanism adds
Hot temperature is 650～800 DEG C, and the heating-up temperature of the secondary normalizing mechanism is 500～650 DEG C, the heating of the tempering mechanism
Temperature is 300～400 DEG C.By the strip steel according to concrete different model, different interval preheating temperatures of optimized choice, once just
Fiery temperature, secondary normalizing temperature and temperature, can further improve the extensibility of weld seam.
In such scheme, the preheating device, normalizing mechanism, secondary normalizing mechanism and a tempering mechanism are using height
Frequency sensing heater, the end face of the rolling wheel of the Roller compaction device is circular arc.Certainly, other heaters may also be employed.Pass through
Adopt end face for circular arc rolling wheel, force localization when rolling can be made in welded seam area, so as to preferably destruction Jing
Crystallization after normalizing so as to even closer.
In such scheme, the lower step operation of the welding sequence of the resistance welder is fragility treatment process, at the fragility
The position of science and engineering sequence is provided with fragility processing meanss, and the fragility processing meanss include subsidiary engine dolly and are sequentially arranged in described
Water box, annealing mechanism and circulation water refrigerating machine on subsidiary engine dolly, with correspondence institute on the subsidiary engine dolly in the water box
The rapidly cooling spray that the position above water box is respectively provided with the welding region positive and negative for being rapidly cooled in tape steel is stated,
The rapidly cooling spray connect with the delivery outlet of the circulation water refrigerating machine, the water box and described circulates water refrigerating machine
Input port connects, and the heating-up temperature of the annealing mechanism is 500～650 DEG C, and the annealing mechanism adopts high frequency induction heater.
It is special to be directed to 400 series stainless steels, by adding fragility processing meanss in the lower step procedure position of welding sequence, and use at fragility
Reason substitutes temper, can so eliminate the fragility of 400 series stainless steels, so as to further increasing 400 series stainless steels
Plasticity and extensibility.
Above-mentioned fragility treatment process is designed particular for 400 series stainless steels, although the weldering of 400 series stainless steels
Seam can improve certain extensibility after the heat treatment before spreading, but due to 400 being that rustless steel has its own feature (ferrite
And ferrum element～Ovshinsky two-phase body), therefore, after the heat treatment before spreading, welded seam area is still for the weld seam of 400 series stainless steels
Weld seam fragility is formed because metal structure is influenced by heat (temperature drop).Therefore using rapidly being cooled down to weld seam, need to anneal
Heating, rapidly cool down again go fragility technique, brittleness problems could be solved, so as to meet the steel grade in pickling, the operation of rolling
In ductile strength require.
Specifically, 400 to be rustless steel heat (600～800 DEG C) and Jing after rolling in normalizing, temperature drop through 400
～550 DEG C of regions and certain hour can be stopped, 475 DEG C of friable tissues now easily occur, reduce weld strength, it is impossible to meet life
Produce and require.For solving this problem, it is necessary to carry out annealing heating (500～650 DEG C) to welded seam area, then rapidly cooling makes again
Weld seam temperature declines rapidly, is rapidly separated 475 DEG C of fragility warm areas, thus can eliminate its fragility, so as to improving plastic property of weld bead and prolonging
Stretching property.But as normalizing heats (600～800 DEG C) and Jing after rolling, weld seam temperature declines with uncertainty, may fall into
400～550 DEG C of regions, it is also possible to fall into 550～650 DEG C of regions, for the former need to carry out annealing heating quenching again, for
The latter only needs chilling, therefore increased complexity to temperature detection and control, also reduces reliability, and cost also accordingly can increase
Plus, for this purpose, we adopt unified approach, i.e.,：Weld seam unification is rapidly cooled after having rolled makes temperature be down to room temperature,
Then with this as the starting point, re-annealing heating (500～650 DEG C), and be rapidly cooled to room temperature.
Present invention also offers a kind of resistance welding technology with on-line continuous weld seam heat treatment, comprises the following steps：
1) online strip steel carries out shearing piece by shear on the shearing station of welding sequence；
2), after shearing piece is finished, the welding region of the online strip steel passes through on the preheating station of the welding sequence
Preheating device carries out on-line continuous intensification preheating；
3) heat up after preheating, the online strip steel is entered by welder on the welding post of the welding sequence
Row welding；
4) after welding is finished, the welded seam area of the online strip steel heat treatment station and spreading work in the welding sequence
Being corresponded on position respectively carries out on-line continuous weld seam heat treatment and on-line continuous weld seam spreading by annealing device and Roller compaction device.
By adding the preheating station that can carry out intensification preheating to the welding region of online strip steel before welding post, this
Sample, can both reduce welding stress, can reduce weld strain speed again, expand in being conducive to avoiding producing weld crack and weld metal
The effusion of scattered hydrogen, it is to avoid produce hydrogen induced cracking, meanwhile, the degree of hardening of weld dimensions can be also reduced, and, also to subtracting
The rate of cooling of slow postwelding 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, so as to greatly improve
The extensibility of weld seam.
In such scheme, the lower step operation of the welding sequence is fragility treatment process, the position of the fragility treatment process
Put and be provided with fragility processing meanss, the fragility processing meanss include subsidiary engine dolly and are sequentially arranged on the subsidiary engine dolly
Water box, annealing mechanism and circulation water refrigerating machine, in the water box and on the subsidiary engine dolly on the correspondence water box
The position of side is respectively provided with the rapidly cooling spray of the welding region positive and negative for being rapidly cooled in tape steel, described rapidly cold
But shower nozzle is connected with the delivery outlet of the circulation water refrigerating machine, and the water box is connected with the input port of the circulation water refrigerating machine
Logical, the heating-up temperature of the annealing mechanism is 500～650 DEG C, and the annealing mechanism adopts high frequency induction heater.By welding
The lower step process step design of operation is connect into fragility treatment process, the fragility of 400 series stainless steels can be so eliminated, so as to further
Improve the plasticity and extensibility of 400 series stainless steels.
In such scheme, the step 4) it is specially：
After 4a) welding is finished, the welded seam area of the online strip steel just passes through on the normalizing station of the welding sequence
Lighter structure carries out on-line continuous weld seam normalized treatment；
After 4b) normalized treatment is finished, the welded seam area of the online strip steel leads on the spreading station of the welding sequence
Crossing Roller compaction device carries out on-line continuous weld seam spreading；
After 4c) spreading is finished, the welded seam area of the online strip steel passes through back on the tempering station of the welding sequence
Lighter structure is carried out on-line continuous weld seam temper or is filled by fragility process on the position of the fragility treatment process
Putting carries out the process of on-line continuous weld seam fragility.
First, the thick crystallization of weld dimensions so, can be made using the heat treatment of normalizing process to welded seam area
Diffusion and refinement, so that greatly increase the extensibility of weld seam；Then, spreading work is adopted to the crystallization after diffusion and refinement
Skill so as to become even closer, so that further improve the extensibility of weld seam；Finally, to welded seam area using tempering
The heat treatment of technique, makes to be crystallized by the refinement crystal that spreading is destroyed again, so as to yet further improve the extensibility of weld seam,
Or 400 series stainless steels are directed to, directly to welded seam area using fragility process after spreading, the fragility of 400 series stainless steels is eliminated,
So as to yet further improve the plasticity and extensibility of 400 series stainless steels.
In such scheme, step 4a) it is specially：
After 4a1) welding is finished, the welded seam area of the online strip steel leads on a normalizing station of the welding sequence
Crossing a normalizing mechanism carries out the normalizing of on-line continuous weld seam；
After 4a2) normalizing is finished, the secondary normalizing station of the welded seam area of the online strip steel in the welding sequence
It is upper that on-line continuous weld seam secondary normalizing is carried out by secondary normalizing mechanism.
The thick crystallization of weld dimensions can be made to welded seam area first using the heat treatment of a normalizing by postwelding
Body is spread, and makes which be evenly distributed, while keeping weld dimensions uniform temperature to prepare for secondary normalizing；Immediately
Refines can weld dimensions texture, while passing through by welded seam area using the heat treatment of secondary normalizing
Double normalizing, makes the strip welded seam area temperature of fabric width >=1000mm than more uniform, balance, so as to 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 the preheating device is 150～200 DEG C, and a normalizing mechanism adds
Hot temperature is 650～800 DEG C, and the heating-up temperature of the secondary normalizing mechanism is 500～650 DEG C, the heating of the tempering mechanism
Temperature is 300～400 DEG C.By the strip steel according to concrete different model, different interval preheating temperatures of optimized choice, once just
Fiery temperature, secondary normalizing temperature and temperature, can further improve the extensibility of weld seam.
In such scheme, the preheating device, normalizing mechanism, secondary normalizing mechanism and a tempering mechanism are using height
Frequency sensing heater, the end face of the rolling wheel of the Roller compaction device is circular arc.Certainly, other heaters may also be employed.Pass through
Adopt end face for circular arc rolling wheel, force localization when rolling can be made in welded seam area, so as to preferably destruction Jing
Crystallization after normalizing so as to even closer.
In such scheme, the on-line continuous weld seam fragility is processed and is specially：
The welded seam area of the described online strip steel after spreading passes through in the rapidly cooling station of the fragility treatment process
The rapidly cooling spray is rapidly down to room temperature；
The welded seam area of the described online strip steel being down to after room temperature passes through on the annealing station of the fragility treatment process
The annealing mechanism is made annealing treatment；
The welded seam area of the described online strip steel after annealing leads in the rapidly cooling station of the fragility treatment process again
Cross the rapidly cooling spray and be rapidly down to room temperature.
Coordinate the technique for rapidly cooling down by adopting annealing, 400 series stainless steels are eliminated in 475 DEG C of interval generations
Friable tissues, so as to further increasing the plasticity and extensibility of 400 series stainless steels；Meanwhile, by annealing
It is front once to cool down again plus rapidly, ensure the uniformity of technique and welding quality.
The beneficial effect brought of technical scheme that the present invention is provided is：
1st, by intensification preheating being carried out to welding region before weldering, so, welding stress can have both been reduced, can reduce welding again should
Variable Rate, is conducive to avoiding the effusion for producing diffusible hydrogen in weld crack and weld metal, it is to avoid produce hydrogen induced cracking, meanwhile,
The degree of hardening of weld dimensions can be also reduced, and, also the rate of cooling to slowing down postwelding has assosting effect；And lead to
Crossing postwelding carries out heat treatment to welded seam area, so, can make the thick crystallization diffusion of weld dimensions and refine, so as to big
The earth improves the extensibility of weld seam；
2nd, first, normalized treatment is carried out to welded seam area by postwelding, the thick knot of weld dimensions so, can be made
Brilliant diffusion and refinement, so that greatly increase the extensibility of weld seam；Then, the crystallization Jing Roller compaction devices after spreading and refine are rolled over
Become even closer after pressure, so as to further improve the extensibility of weld seam；Finally, welded seam area is through temper
Afterwards, the refinement crystal for being destroyed by Roller compaction device spreading is crystallized again, so as to yet further improve the extensibility of weld seam；
3rd, a normalizing is carried out by postwelding to welded seam area, is expanded can the thick crystalline solid of weld dimensions
Dissipate, and make which be evenly distributed, while keeping weld dimensions uniform temperature to prepare for secondary normalizing；Followed by two
Secondary normalizing, refines can weld dimensions texture, while through double normalizing, welding the strip of fabric width >=1000mm
Seam regional temperature improves metal than more uniform, balance so as to create a further reduction the degree of hardening of weld dimensions
Extensibility；
4th, 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 extensibility of weld seam；
5th, by adopt end face for circular arc rolling wheel, force localization when rolling can be made in welded seam area, so as to
The crystallization that preferably can be destroyed Jing after normalizing so as to even closer；
6th, it is special to be directed to 400 series stainless steels, by adding fragility processing meanss in the lower step procedure position of welding sequence,
And temper is substituted with fragility process, the fragility of 400 series stainless steels can be so eliminated, so as to further increasing 400
The plasticity and extensibility of series stainless steel；
7th, by adding the preheating station that can carry out intensification preheating to the welding region of online strip steel before welding post, this
Sample, can both reduce welding stress, can reduce weld strain speed again, expand in being conducive to avoiding producing weld crack and weld metal
The effusion of scattered hydrogen, it is to avoid produce hydrogen induced cracking, meanwhile, the degree of hardening of weld dimensions can be also reduced, and, also to subtracting
The rate of cooling of slow postwelding 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, so as to greatly improve
The extensibility of weld seam；
8th, 400 series stainless steels can be so eliminated by by the lower step process step design of welding sequence into fragility treatment process
Fragility, so as to further increasing the plasticity and extensibility of 400 series stainless steels；
9th, first, the thick knot of weld dimensions so, can be made using the heat treatment of normalizing process to welded seam area
Brilliant diffusion and refinement, so that greatly increase the extensibility of weld seam；Then, spreading work is adopted to the crystallization after diffusion and refinement
Skill so as to become even closer, so that further improve the extensibility of weld seam；Finally, to welded seam area using tempering
The heat treatment of technique, makes to be crystallized by the refinement crystal that spreading is destroyed again, so as to yet further improve the extensibility of weld seam,
Or 400 series stainless steels are directed to, directly to welded seam area using fragility process after spreading, the fragility of 400 series stainless steels is eliminated,
So as to yet further improve the plasticity and extensibility of 400 series stainless steels；
10th, the heat treatment of a normalizing is first adopted by postwelding to welded seam area, the thick of weld dimensions can be made
Crystalline solid is spread, and makes which be evenly distributed, while keeping weld dimensions uniform temperature to prepare for secondary normalizing；
Refine can weld dimensions texture followed by welded seam area using the heat treatment of secondary normalizing, while
Through double normalizing, the strip welded seam area temperature of fabric width >=1000mm is made than more uniform, balance, so as to create a further reduction
The degree of hardening of weld dimensions, improves metal extensibility；
11st, coordinate the technique for rapidly cooling down by adopting annealing, eliminate 400 series stainless steels interval at 475 DEG C
The friable tissues of generation, so that further increasing the plasticity and extensibility of 400 series stainless steels；
12nd, by once cooling down again plus rapidly before annealing, the technique when 400 series stainless steel is welded has been ensured
With the uniformity of welding quality.
The present invention have simple structure, can on-line continuous heat treatment, process is simple, welding are carried out to welding region and weld seam
After good the features such as the good-extensibility of weld dimensions.
Description of the drawings
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, welder 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 is little
Car 7a, water box 7b, annealing mechanism 7c, circulate 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 embodiment party of the present invention
Formula is described in further detail.
This welding machine includes two large divisions：Welding portion (i.e. label part 1～6) and subsidiary engine part (i.e. label part 7)；It is right
Ying Di, its welding procedure include welding sequence and fragility treatment process two large divisions.
Embodiment 1：
A kind of resistance welder with on-line continuous weld seam heat treatment, including welding tractor 1, and is sequentially arranged at the weldering
Shear 2 on dolly 1, welder 3 and Roller compaction device 4 is connect, the correspondence resistance welding on the welding tractor 1
Position in front of device 3 is provided with the preheating device 5 that can carry out on-line continuous intensification preheating to welding region, the preheating device 5
It is arranged between the shear 2 and welder 3, on the welding tractor 1 after the corresponding welder 3
The position of side is provided with the annealing device 6 that can carry out on-line continuous weld seam heat treatment to welded seam area.It is front to weld zone by weldering
Domain carries out intensification preheating, so, can both reduce welding stress, and can reduce weld strain speed again, is conducive to avoiding producing welding
The effusion of diffusible hydrogen in crackle and weld metal, it is to avoid produce hydrogen induced cracking, meanwhile, can also reduce quenching for weld dimensions
Hard degree, and, also the rate of cooling to slowing down postwelding has assosting effect；And hot place is carried out to welded seam area by postwelding
Reason, so, can make the thick crystallization diffusion of weld dimensions and refine, so as to greatly increase the extensibility of weld seam.
Above-mentioned annealing device 6 includes the normalizing mechanism that can carry out on-line continuous weld seam normalized treatment to the welded seam area
6a and the tempering mechanism 6b that can carry out on-line continuous weld seam temper to the welded seam area, the normalizing mechanism 6a are arranged in
Between the welder 3 and Roller compaction device 4, the tempering mechanism 6b is arranged in 4 rear of the Roller compaction device.First,
Normalized treatment is carried out to welded seam area by postwelding, so, the thick crystallization diffusion of weld dimensions can be made and refined, from
And greatly increase the extensibility of weld seam；Then, the crystallization after spreading and refine Jing after 4 spreading of Roller compaction device becomes more to step up
It is close, so as to further improve the extensibility of weld seam；Finally, welded seam area is rolled over by Roller compaction device 4 after temper
Crush bad refinement crystal to crystallize again, so as to yet further improve the extensibility of weld seam.The normalizing mechanism 6a is wrapped again
A normalizing mechanism 6a1 and secondary normalizing mechanism 6a2 is included, the secondary normalizing mechanism 6a2 is arranged in a normalizing mechanism
6a1 rears.Normalizing is carried out by postwelding to welded seam area, is expanded can the thick crystalline solid of weld dimensions
Dissipate, and make which be evenly distributed, while keeping weld dimensions uniform temperature to prepare for secondary normalizing；Followed by two
Secondary normalizing, refines can weld dimensions texture, while through double normalizing, welding the strip of fabric width >=1000mm
Seam regional temperature improves metal than more uniform, balance so as to create a further reduction the degree of hardening of weld dimensions
Extensibility.
The heating-up temperature of above-mentioned preheating device 5 is 150～200 DEG C, and the heating-up temperature of the normalizing mechanism 6a1 is
650～800 DEG C, the heating-up temperature of the secondary normalizing mechanism 6a2 is 500～650 DEG C, the heating-up temperature of the tempering mechanism 6b
For 300～400 DEG C.By the strip steel according to concrete different model, the different interval preheating temperatures of optimized choice, a normalizing temperature
Degree, secondary normalizing temperature and temperature, can further improve the extensibility of weld seam.5, normalizing of the preheating device
Mechanism 6a1, secondary normalizing mechanism 6a2 and tempering mechanism 6b adopt high frequency induction heater, the rolling wheel of the Roller compaction device 4
End face be circular arc.Certainly, other heaters may also be employed.By adopt end face for circular arc rolling wheel, can make to roll
When force localization in welded seam area, so as to preferably crystallization of the destruction Jing after normalizing so as to even closer；The spreading
Device 4 also ensures that smooth welded seam.
The lower step operation of the welding sequence of above-mentioned resistance welder is fragility treatment process, on the position of the fragility treatment process
Fragility processing meanss 7 are provided with, the fragility processing meanss 7 include subsidiary engine dolly 7a and are sequentially arranged in the subsidiary engine dolly 7a
On water box 7b, annealing mechanism 7c and circulation water refrigerating machine 7d, correspondence in the water box 7b and on the subsidiary engine dolly 7a
Position above the water box 7b is respectively provided with the rapidly cooling of the welding region positive and negative for being rapidly cooled in tape steel
Shower nozzle 7e, the rapidly cooling spray 7e are connected with the delivery outlet of the circulation water refrigerating machine 7d, the water box 7b with it is described
The input port connection of circulation water refrigerating machine 7d, the heating-up temperature of the annealing mechanism 7c is 500～650 DEG C, the annealing mechanism
7c adopts high frequency induction heater.Spy is directed to 400 series stainless steels, crisp by adding in the lower step procedure position of welding sequence
Property processing meanss 7, and with fragility process substitute temper, can so eliminate the fragility of 400 series stainless steels, so as to further
Improve the plasticity and extensibility of 400 series stainless steels.
The present embodiment so, can both reduce welding stress, can reduce again by carrying out intensification preheating to welding region before weldering
Weld strain speed, is conducive to avoiding the effusion for producing diffusible hydrogen in weld crack and weld metal, it is to avoid produce hydrogen induced cracking,
Meanwhile, the degree of hardening of weld dimensions can be also reduced, and, also the rate of cooling to slowing down postwelding has auxiliary to make
With；And heat treatment is carried out to welded seam area by postwelding, so, the thick crystallization of weld dimensions can be made to spread and thin
Change, so as to greatly increase the extensibility of weld seam；First, normalized treatment is carried out to welded seam area by postwelding, so, can be made
The thick crystallization diffusion of weld dimensions and refinement, so that greatly increase the extensibility of weld seam；Then, spread and thin
Crystallization after change becomes even closer Jing after 4 spreading of Roller compaction device, so as to further improve the extensibility of weld seam；Most
Afterwards, welded seam area is crystallized by the refinement crystal that 4 spreading of Roller compaction device is destroyed, again so as to further after temper
Improve the extensibility of weld seam；Normalizing is carried out by postwelding to welded seam area, the thick of weld dimensions can be made
Crystalline solid is spread, and makes which be evenly distributed, while keeping weld dimensions uniform temperature to prepare for secondary normalizing；
Followed by secondary normalizing, refine can weld dimensions texture, while through double normalizing, make fabric width >=
The strip welded seam area temperature of 1000mm than it is more uniform, balance, so as to create a further reduction hardening for weld dimensions
Degree, improves metal extensibility；By the strip steel according to concrete different model, the different interval preheating temperatures of optimized choice,
Normalizing temperature, secondary normalizing temperature and a temperature, can further improve the extensibility of weld seam；By adopting end face
For the rolling wheel of circular arc, force localization when rolling can be made in welded seam area, so as to preferably destruction Jing after normalizing
Crystallization so as to even closer；It is special to be directed to 400 series stainless steels, by adding fragility in the lower step procedure position of welding sequence
Processing meanss 7, and temper is substituted with fragility process, the fragility of 400 series stainless steels can be so eliminated, so as to further
Improve the plasticity and extensibility of 400 series stainless steels.
(for high strength alloy steel and high-phosphorus iron ore etc., certainly, 400 series stainless steels may also be employed the present embodiment to embodiment 2
Scheme, but which is also easy to produce fragility)：
A kind of resistance welding technology 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 is finished, the welding region of the online strip steel passes through on the preheating station of the welding sequence
Preheating device 5 carries out on-line continuous intensification and is preheated to 150～200 DEG C；
3) heat up after preheating, the online strip steel passes through welder 3 on the welding post of the welding sequence
Welded；
After 4a1) welding is finished, the welded seam area of the online strip steel leads on a normalizing station of the welding sequence
Crossing a normalizing mechanism 6a1 carries out the normalizing of on-line continuous weld seam, and a normalizing temperature is 650～800 DEG C；
After 4a2) normalizing is finished, the secondary normalizing station of the welded seam area of the online strip steel in the welding sequence
Upper to carry out on-line continuous weld seam secondary normalizing by secondary normalizing mechanism 6a2, the secondary normalizing temperature is 500～650 DEG C；
After 4b) normalized treatment is finished, the welded seam area of the online strip steel leads on the spreading station of the welding sequence
Crossing Roller compaction device 4 carries out on-line continuous weld seam spreading；
After 4c) spreading is finished, the welded seam area of the online strip steel passes through back on the tempering station of the welding sequence
Lighter structure 6b carries out on-line continuous weld seam temper, and the temper temperature is 300～400 DEG C.
Above-mentioned preheating device 5, normalizing mechanism 6a1, a secondary normalizing mechanism 6a2 and tempering mechanism 6b adopt high frequency sense
Heater is answered, the end face of the rolling wheel of the Roller compaction device 4 is circular arc.Certainly, other heaters may also be employed.By adopting
Rolling wheel of the end face for circular arc, can make force localization when rolling in welded seam area, so as to preferably destruction Jing normalizings
Crystallization afterwards so as to even closer.
The present embodiment can carry out the preheating of intensification preheating by adding before welding post to the welding region of online strip steel
Station, so, can both reduce welding stress, can reduce weld strain speed again, be conducive to avoiding producing weld crack and weld seam
The effusion of diffusible hydrogen in metal, it is to avoid produce hydrogen induced cracking, meanwhile, the degree of hardening of weld dimensions can be also reduced, and
And, also the rate of cooling to slowing down postwelding has assosting effect；And can be to the weldering of online strip steel by adding after welding post
Seam region carries out the heat treatment station of heat treatment, so, can make the thick crystallization diffusion of weld dimensions and refine, so as to
Greatly increase the extensibility of weld seam；First, to welded seam area using normalizing process heat treatment, so, can make weld seam and
The thick crystallization diffusion of heat affected area and refinement, so that greatly increase the extensibility of weld seam；Then, after to diffusion and refinement
Crystallization adopt roll milling craft so as to become even closer, so as to further improve the extensibility of weld seam；Finally, it is right
Heat treatment of the welded seam area using tempering process, makes to be crystallized by the refinement crystal that spreading is destroyed again, so as to yet further carry
The high extensibility of weld seam；Weld dimensions can be made to welded seam area first using the heat treatment of a normalizing by postwelding
Thick crystalline solid spread, and make which be evenly distributed, while keeping weld dimensions uniform temperature to be secondary normalizing
Prepare；Weld dimensions texture can be made thin followed by welded seam area using the heat treatment of secondary normalizing
Change, while through double normalizing, making the strip welded seam area temperature of fabric width >=1000mm than more uniform, balance, so as to further
Reduce the degree of hardening of weld dimensions, improve metal extensibility；By the strip steel according to concrete different model,
The different interval preheating temperatures of optimized choice, normalizing temperature, secondary normalizing temperature and a temperature, further can carry
The extensibility of high weld seam；By adopt end face for circular arc rolling wheel, force localization when rolling can be made in welded seam area,
So as to preferably crystallization of the destruction Jing after normalizing so as to even closer.
Embodiment 3 (special to be directed to 400 series stainless steels)：
A kind of resistance welding technology 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 is finished, the welding region of the online strip steel passes through on the preheating station of the welding sequence
Preheating device 5 carries out on-line continuous intensification and is preheated to 100～200 DEG C；
3) heat up after preheating, the online strip steel passes through welder 3 on the welding post of the welding sequence
Welded；
After 4a1) welding is finished, the welded seam area of the online strip steel leads on a normalizing station of the welding sequence
Crossing a normalizing mechanism 6a1 carries out the normalizing of on-line continuous weld seam, and a normalizing temperature is 600～800 DEG C；
After 4a2) normalizing is finished, the secondary normalizing station of the welded seam area of the online strip steel in the welding sequence
Upper to carry out on-line continuous weld seam secondary normalizing by secondary normalizing mechanism 6a2, the secondary normalizing temperature is 600～800 DEG C；
After 4b) normalized treatment is finished, the welded seam area of the online strip steel leads on the spreading station of the welding sequence
Crossing Roller compaction device 4 carries out on-line continuous weld seam spreading；
After 4c) spreading is finished, the rapidly cooling station of the welded seam area of the online strip steel in the fragility treatment process
It is upper that room temperature is rapidly down to by the rapidly cooling spray 7e；
The welded seam area of the described online strip steel being down to after room temperature passes through on the annealing station of the fragility treatment process
The annealing mechanism 7c is made annealing treatment, and the annealing temperature is 500～650 DEG C；
The welded seam area of the described online strip steel after annealing leads in the rapidly cooling station of the fragility treatment process again
Cross the rapidly cooling spray 7e and be rapidly down to room temperature.
Specifically, the fragility processing meanss 7 on the position of above-mentioned fragility treatment process include subsidiary engine dolly 7a and successively
The water box 7b, the annealing mechanism 7c that are arranged on the subsidiary engine dolly 7a and circulation water refrigerating machine 7d, in the water box 7b and
Position on the subsidiary engine dolly 7a above the correspondence water box 7b is respectively provided with the welding for being rapidly cooled in tape steel
The rapidly cooling spray 7e of region positive and negative, the rapidly cooling spray 7e are connected with the delivery outlet of the circulation water refrigerating machine 7d
Logical, the water box 7b is connected with the input port of the circulation water refrigerating machine 7d.During initial position, weld seam is located at the water box
Above 7b, after rapidly cooling is finished for the first time, subsidiary engine dolly 7a is moved to the left, and annealing mechanism 7c is located at below weld seam and is moved back
Fire is processed, and after annealing is finished, subsidiary engine dolly 7a returns to the right make water box 7b return to below weld seam, finally carry out second again
Rapidly cool down.
Above-mentioned preheating device 5, normalizing mechanism 6a1, secondary normalizing mechanism 6a2 and an annealing mechanism 7c adopt high frequency sense
Heater is answered, the end face of the rolling wheel of the Roller compaction device 4 is circular arc.Certainly, other heaters may also be employed.By adopting
Rolling wheel of the end face for circular arc, can make force localization when rolling in welded seam area, so as to preferably destruction Jing normalizings
Crystallization afterwards so as to even closer.
The present embodiment can carry out the preheating of intensification preheating by adding before welding post to the welding region of online strip steel
Station, so, can both reduce welding stress, can reduce weld strain speed again, be conducive to avoiding producing weld crack and weld seam
The effusion of diffusible hydrogen in metal, it is to avoid produce hydrogen induced cracking, meanwhile, the degree of hardening of weld dimensions can be also reduced, and
And, also the rate of cooling to slowing down postwelding has assosting effect；And can be to the weldering of online strip steel by adding after welding post
Seam region carries out the heat treatment station of heat treatment, so, can make the thick crystallization diffusion of weld dimensions and refine, so as to
Greatly increase the extensibility of weld seam；, can so disappear into fragility treatment process by by the lower step process step design of welding sequence
Except the fragility of 400 series stainless steels, so as to further increasing the plasticity and extensibility of 400 series stainless steels；First, butt welding
Heat treatment of the seam region using normalizing process, so, can make the thick crystallization diffusion of weld dimensions and refine, so as to big
The earth improves the extensibility of weld seam；Then, roll milling craft is adopted to the crystallization after diffusion and refinement so as to become more to step up
It is close, so as to further improve the extensibility of weld seam；Finally, 400 series are eliminated not using fragility process to welded seam area
The fragility of rust steel, so that yet further improve the plasticity and extensibility of 400 series stainless steels；By postwelding to welded seam area
First using the heat treatment of a normalizing, spread can the thick crystalline solid of weld dimensions, and make which be evenly distributed,
Weld dimensions uniform temperature is kept to prepare for secondary normalizing simultaneously；Followed by welded seam area using it is secondary just
The heat treatment of fire, refines can weld dimensions texture, while through double normalizing, making the plate of fabric width >=1000mm
Band weld seam regional temperature, is improve so as to create a further reduction the degree of hardening of weld dimensions than more uniform, balance
Metal extensibility；Coordinate the technique for rapidly cooling down by adopting annealing, eliminate 400 series stainless steels interval at 475 DEG C
The friable tissues of generation, so that further increasing the plasticity and extensibility of 400 series stainless steels；By before annealing
Rapidly cool down again plus once, ensured the uniformity of the technique and welding quality when 400 series stainless steel is welded；By basis
The strip steel of concrete different model, the different interval preheating temperatures of optimized choice, normalizing temperature, secondary normalizing temperature and a tempering
Temperature, can further improve the extensibility of weld seam；By adopt end face for circular arc rolling wheel, work when rolling can be made
Welded seam area is concentrated on firmly, so as to preferably crystallization of the destruction Jing after normalizing so as to even closer.
The foregoing is only presently preferred embodiments of the present invention, not to limit the present invention, all spirit in the present invention and
Within principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (7)
1. a kind of resistance welder with on-line continuous weld seam heat treatment, including welding tractor (1), and is sequentially arranged at the weldering
Connect shear (2) on dolly (1), welder (3) and Roller compaction device (4), it is characterised in that the welding tractor
(1) position in front of correspondence welder (3) is provided with can carry out on-line continuous intensification preheating to welding region
Preheating device (5), preheating device (5) are arranged between the shear (2) and welder (3), the weldering
The position for connecing correspondence welder (3) rear on dolly (1) is provided with and can carry out on-line continuous weld seam to welded seam area
The annealing device (6) of heat treatment；Described annealing device (6) include just to carry out on-line continuous weld seam to the welded seam area
The fiery normalizing mechanism (6a) for processing and the tempering mechanism (6b) that on-line continuous weld seam temper can be carried out to the welded seam area,
Normalizing mechanism (6a) is arranged between the welder (3) and Roller compaction device (4), tempering mechanism (6b) cloth
Put at the Roller compaction device (4) rear；Normalizing mechanism (6a) includes a normalizing mechanism (6a1) and secondary normalizing mechanism again
(6a2), secondary normalizing mechanism (6a2) is arranged in a normalizing mechanism (6a1) rear；Preheating device (5)
Heating-up temperature is 150～200 DEG C, and the heating-up temperature of a normalizing mechanism (6a1) is 650～800 DEG C, the secondary normalizing
The heating-up temperature of mechanism (6a2) is 500～650 DEG C, and the heating-up temperature of tempering mechanism (6b) is 300～400 DEG C；It is described pre-
Thermal (5), normalizing mechanism (6a1), secondary normalizing mechanism (6a2) and tempering mechanism (6b) adopt high-frequency induction heating
Device, the end face of the rolling wheel of Roller compaction device (4) is circular arc；The lower step operation of the welding sequence of the resistance welder is crisp
Property treatment process, the position of the fragility treatment process are provided with fragility processing meanss (7), and fragility processing meanss (7) include
Subsidiary engine dolly (7a) and the water box (7b) being sequentially arranged on subsidiary engine dolly (7a), annealing mechanism (7c) and recirculated water
Position point in refrigeration machine (7d), water box (7b) and on subsidiary engine dolly (7a) above correspondence water box (7b)
Rapidly cooling spray (7e) for being rapidly cooled in the welding region positive and negative of tape steel, the rapidly cooling spray are not provided with
(7e) connect with the delivery outlet of circulation water refrigerating machine (7d), water box (7b) and circulation water refrigerating machine (7d)
Input port connects, and the heating-up temperature of annealing mechanism (7c) is 500～650 DEG C, and annealing mechanism (7c) adopts high frequency sense
Answer heater.
2. a kind of resistance welding technology with on-line continuous weld seam heat treatment, it is characterised in that comprise 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 is finished, the welding region of the online strip steel passes through preheating on the preheating station of the welding sequence
Device (5) carries out on-line continuous intensification preheating；
3) heat up after preheating, the online strip steel is entered by welder (3) on the welding post of the welding sequence
Row welding；
4), after welding is finished, the welded seam area of the online strip steel is in the heat treatment station and spreading station of the welding sequence
Corresponding to respectively carries out on-line continuous weld seam heat treatment and the rolling of on-line continuous weld seam by annealing device (6) and Roller compaction device (4)
Pressure；
The lower step station of the welding post is provided with the fragility processing meanss (7) that can carry out fragility treatment process, the fragility
Processing meanss (7) include subsidiary engine dolly (7a) and the water box (7b) being sequentially arranged on subsidiary engine dolly (7a), annealing
Mechanism (7c) and circulation water refrigerating machine (7d), with the correspondence water box on subsidiary engine dolly (7a) in water box (7b)
(7b) position above is respectively provided with the rapidly cooling spray (7e) of the welding region positive and negative for being rapidly cooled in tape steel,
Rapidly cooling spray (7e) is connected with the delivery outlet of circulation water refrigerating machine (7d), and water box (7b) is followed with described
The input port connection of ring water refrigerating machine (7d), the heating-up temperature of annealing mechanism (7c) is 500～650 DEG C, the annealing machine
Structure (7c) adopts high frequency induction heater.
3. the resistance welding technology with on-line continuous weld seam heat treatment as claimed in claim 2, it is characterised in that the step
4) it is specially：
After 4a) welding is finished, the welded seam area of the online strip steel passes through normalizing machine on the normalizing station of the welding sequence
Structure (6a) carries out on-line continuous weld seam normalized treatment；
After 4b) normalized treatment is finished, the welded seam area of the online strip steel passes through to roll on the spreading station of the welding sequence
Pressure device (4) carries out on-line continuous weld seam spreading；
After 4c) spreading is finished, the welded seam area of the online strip steel passes through tempering machine on the tempering station of the welding sequence
Structure (6b) is carried out on-line continuous weld seam temper or is filled by fragility process on the position of the fragility treatment process
Putting (7) carries out the process of on-line continuous weld seam fragility.
4. the resistance welding technology with on-line continuous weld seam heat treatment as claimed in claim 3, it is characterised in that step 4a)
Specially：
After 4a1) welding is finished, the welded seam area of the online strip steel passes through one on a normalizing station of the welding sequence
Secondary normalizing mechanism (6a1) carries out the normalizing of on-line continuous weld seam；
After 4a2) normalizing is finished, the welded seam area of the online strip steel leads on the secondary normalizing station of the welding sequence
Crossing secondary normalizing mechanism (6a2) carries out on-line continuous weld seam secondary normalizing.
5. the resistance welding technology with on-line continuous weld seam heat treatment as claimed in claim 4, it is characterised in that the preheating
The heating-up temperature of device (5) is 150～200 DEG C, and the heating-up temperature of a normalizing mechanism (6a1) is 650～800 DEG C, institute
State secondary normalizing mechanism (6a2) heating-up temperature be 500～650 DEG C, it is described tempering mechanism (6b) heating-up temperature be 300～
400℃。
6. the resistance welding technology with on-line continuous weld seam heat treatment as claimed in claim 4, it is characterised in that the preheating
Device (5), normalizing mechanism (6a1), secondary normalizing mechanism (6a2) and tempering mechanism (6b) adopt high-frequency induction heating
Device, the end face of the rolling wheel of Roller compaction device (4) is circular arc.
7. the resistance welding technology with on-line continuous weld seam heat treatment as claimed in claim 3, it is characterised in that described online
The process of continuous weld fragility is specially：
The welded seam area of the described online strip steel after spreading is in the rapidly cooling station of the fragility treatment process by described
Rapidly cooling spray (7e) is rapidly down to room temperature；
The welded seam area of the described online strip steel being down to after room temperature is on the annealing station of the fragility treatment process by described
Annealing mechanism (7c) is made annealing treatment；
The welded seam area of the described online strip steel after annealing is again by institute in the rapidly cooling station of the fragility treatment process
State rapidly cooling spray (7e) and be rapidly down to room temperature.
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| CN105834625A (en) * | 2016-06-03 | 2016-08-10 | 浙江甬金金属科技股份有限公司 | Steel belt welding machine |
| CN109909615A (en) * | 2019-03-28 | 2019-06-21 | 武汉钢铁有限公司 | The laser threading welding jig and its welding method of deformed steel strip steel band |
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| US3771215A (en) * | 1972-03-30 | 1973-11-13 | Wean United Inc | Flash welding method |
| JPH08281306A (en) * | 1995-04-10 | 1996-10-29 | Sumitomo Metal Ind Ltd | Manufacture of wide-width steel strip |
| CN2635268Y (en) * | 2003-08-31 | 2004-08-25 | 武汉凯奇特种焊接设备有限责任公司 | Electric resistance seam welding machine used for welding high hardness belt steel |
| CN101780579A (en) * | 2010-03-23 | 2010-07-21 | 天津天海石化设备制造有限公司 | Submerged automatic arc welding or shielded metal arc welding method for 15CrMoR(H) antihydrogen low sulfur and phosphorus heat-resistant steel |
| CN102151968B (en) * | 2011-02-19 | 2013-01-09 | 首钢总公司 | Method for adding online annealing function of full-automatic narrow lap welding machine |
| CN102649193B (en) * | 2011-02-24 | 2015-04-01 | 宝山钢铁股份有限公司 | Online laser cutting and welding device and method of band steel |
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| CN203317036U (en) * | 2013-06-13 | 2013-12-04 | 武汉凯奇特种焊接设备有限责任公司 | Resistance welding machine |
| CN104439738A (en) * | 2014-11-07 | 2015-03-25 | 武汉钢铁(集团)公司 | Method for welding oriented silicon steel through Taylor welder and enabling weld joint to smoothly pass through rolling mill |
| CN204975654U (en) * | 2015-05-29 | 2016-01-20 | 武汉凯奇特种焊接设备有限责任公司 | Take online continuous weld thermal treatment's resistance welding machine |
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Effective date of registration: 20170629 Address after: 430040, Hubei, Wuhan, East and West Lake Street Evergreen Avenue, No. 36 Patentee after: Wuhan Kaiqi Metallurgy Welding Equipment Manufacturing Co., Ltd. Address before: 430035 Hubei province in Qiaokou District of Wuhan City Road, the workers and peasants Patentee before: Wuhan Kaiqi Special Welding Equipment Co., Ltd. |