CN104889555A - 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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- CN104889555A CN104889555A CN201510288661.3A CN201510288661A CN104889555A CN 104889555 A CN104889555 A CN 104889555A CN 201510288661 A CN201510288661 A CN 201510288661A CN 104889555 A CN104889555 A CN 104889555A
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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; and the welding technology with online continuous weld seam heat processing is suitable for welders.
Description
Technical field
The present invention relates to welding field, particularly the heat treated resistance welder of one band on-line continuous weld seam and welding procedure thereof.
Background technology
Along with China's automobile, bridge, building, household electrical appliances etc. iron and steel had to the fast development of the industry of wilderness demand, the yield and quality of iron and steel enterprise to the steel of high standard and high performance-price ratio requires also more and more higher.At present, most domestic iron and steel enterprise moves towards the trend of product transformation, equipment upgrading gradually.Therefore, the welding of special rolling-mill section is the significant problem that we are about to face, but utilize common resistance welder and welding procedure cannot meet special substance steel grade, particularly the welding requirements of 400 series stainless steels, high strength alloy steel and high phosphoretic steel etc. at all, particularly:
1, because temperature during electric resistance welding is very high, so this welding process can make welding region temperature suddenly rise, decline, weld dimensions is caused to form quenching, and irregular thick crystallization (particularly 400 series stainless steels, high strength alloy steel and high phosphoretic steel etc.) obviously can be there is in the weld dimensions after quenching, like this, weld dimensions just there will be fracture once stressed;
2, because welding region is larger with temperature difference during welding before welding, so easily produce welding stress, simultaneously, because weld strain speed is higher, so the hydrogen induced cracking easily producing weld crack and cause because of the effusion of diffusible hydrogen in weld metal, and the degree of hardening of weld dimensions is higher.
Summary of the invention
The object of the invention is the deficiency in order to overcome above-mentioned background technology, a kind of heat treated resistance welder of band on-line continuous weld seam and welding procedure thereof of weld seam good-extensibility are provided.
In order to realize above object, the heat treated resistance welder of one band on-line continuous weld seam provided by the invention, comprise welding tractor, and the shear be arranged on successively on described welding tractor, welder and Roller compaction device, on described welding tractor, the position in corresponding described welder front is provided with the preheating device that can carry out on-line continuous intensification preheating to welding region, described preheating device is arranged between described shear and welder, on described welding tractor, the position at corresponding described welder rear is provided with and can carries out the heat treated annealing device of on-line continuous weld seam in butt welded seam region.Before welding, intensification preheating is carried out to welding region, like this, both welding stress can be reduced, weld strain speed can be reduced again, be conducive to the effusion of avoiding producing diffusible hydrogen in weld crack and weld metal, avoid producing hydrogen induced cracking, simultaneously, also the degree of hardening of weld dimensions can be reduced, and, also there is booster action to the cooling velocity slowing down postwelding; And heat-treated by postwelding butt welded seam region, like this, thick crystallization diffusion and the refinement of weld dimensions can be made, thus greatly increase the extensibility of weld seam.
In such scheme, described annealing device comprises and can carry out the normalizing mechanism of on-line continuous weld seam normalized treatment to described welded seam area and can carry out the tempering mechanism of on-line continuous weld seam temper to described welded seam area, described normalizing mechanism is arranged between described welder and Roller compaction device, and described tempering mechanism is arranged in described Roller compaction device rear.First, carry out normalized treatment by postwelding butt welded seam region, like this, thick crystallization diffusion and the refinement of weld dimensions can be made, thus greatly increase the extensibility of weld seam; Then, the crystallization after diffusion and refinement becomes more closely after Roller compaction device spreading, thus further improves the extensibility of weld seam; Finally, welded seam area, after temper, by the refinement crystal crystallization again that Roller compaction device spreading destroys, thus further increasing the extensibility of weld seam again.
In such scheme, described normalizing mechanism comprises again a normalizing mechanism and secondary normalizing mechanism, and described secondary normalizing arrangement of mechanism is at a described normalizing mechanism rear.Carry out a normalizing by postwelding butt welded seam region, the thick crystalline solid of weld dimensions can be made to be spread, and make it be evenly distributed, keep weld dimensions uniform temperature to be that secondary normalizing is prepared simultaneously; Followed by secondary normalizing, the refinement of weld dimensions texture can be made, simultaneously through double normalizing, the strip welded seam area temperature making fabric width >=1000mm relatively evenly, balance, thus create a further reduction the degree of hardening of weld dimensions, improve metal extensibility.
In such scheme, the heating-up temperature of described preheating device is 150 ~ 200 DEG C, the heating-up temperature of a described normalizing mechanism is 650 ~ 800 DEG C, and the heating-up temperature of described secondary normalizing mechanism is 500 ~ 650 DEG C, and the heating-up temperature of described tempering mechanism is 300 ~ 400 DEG C.By the band steel according to concrete different model, the different interval preheat temperature of optimum choice, normalizing temperature, secondary normalizing temperature and a temperature, further can improve the extensibility of weld seam.
In such scheme, described preheating device, normalizing mechanism, secondary normalizing mechanism and a tempering mechanism all adopt high frequency induction heater, and the end face of the rolling wheel of described Roller compaction device is circular arc.Certainly, also other heaters can be adopted.By adopting end face to be the rolling wheel of circular arc, force localization when rolling can be made at welded seam area, thus the crystallization after normalizing can better be destroyed, making it tightr.
In such scheme, the lower step operation of the welding sequence of described resistance welder is fragility treatment process, the position of this fragility treatment process is provided with fragility treating apparatus, described fragility treating apparatus comprises subsidiary engine dolly and is arranged in the water box on described subsidiary engine dolly successively, annealing mechanism and recirculated water refrigeration machine, position in described water box and on described subsidiary engine dolly above corresponding described water box is respectively equipped with the cooling spray rapidly for cooling the welding region positive and negative at tape steel rapidly, described cooling spray is rapidly communicated with the delivery outlet of described recirculated water refrigeration machine, described water box is communicated with the input port of described recirculated water refrigeration machine, the heating-up temperature of described annealing mechanism is 500 ~ 650 DEG C, described annealing mechanism adopts high frequency induction heater.Special for 400 series stainless steels, by adding fragility treating apparatus in the lower step procedure position of welding sequence, and substitute temper with fragility process, the fragility of 400 series stainless steels can be eliminated like this, thus further increasing plasticity and the extensibility of 400 series stainless steels.
Above-mentioned fragility treatment process designs for 400 series stainless steels especially, although the weld seam of 400 series stainless steels can improve certain extensibility after the heat treatment before spreading, but because 400 is that stainless steel has himself feature (ferrite and iron element ~ Ovshinsky two-phase body), therefore, the weld seam of 400 series stainless steels is after the heat treatment before spreading, and welded seam area still forms weld seam fragility because metal structure is influenced by heat (temperature decline).Therefore need adopt butt welded seam cool rapidly, annealing heating, again cool rapidly go fragility technique, could brittleness problems be solved, thus meet the ductile strength requirement of this steel grade in pickling, the operation of rolling.
Particularly, 400 be stainless steel in normalizing heating (600 ~ 800 DEG C) and after rolling, and temperature declines and can stop certain hour through 400 ~ 550 DEG C of regions, now easily occurs 475 DEG C of friable tissues, weld strength is reduced, can not production requirement be met.For head it off, must carry out annealing heating (500 ~ 650 DEG C) in butt welded seam region, and then cooling makes weld seam temperature decline rapidly rapidly, depart from 475 DEG C of fragility warm areas fast, its fragility can be eliminated thus, thus improve plastic property of weld bead and extensibility.But due to normalizing heating (600 ~ 800 DEG C) after rolling, weld seam temperature declines and has uncertainty, 400 ~ 550 DEG C of regions may be fallen into, also 550 ~ 650 DEG C of regions may be fallen into, annealing heating quenching again need be carried out for the former, only chilling is needed for the latter, add complexity therefore to temperature detection and control, also reliability is made to reduce, cost also can correspondingly increase, for this reason, we adopt unified approach, that is: having rolled unified the cooling rapidly of rear butt welded seam makes temperature be down to normal temperature, then with this as the starting point, annealing heating (500 ~ 650 DEG C) again, and be cooled to normal temperature rapidly.
Present invention also offers the heat treated resistance welding technology of a kind of band on-line continuous weld seam, comprise the following steps:
1) on the shearing station of welding sequence, shearing piece is carried out by shear at tape steel;
2) shear after piece, the described welding region at tape steel carries out on-line continuous intensification preheating by preheating device on the preheating station of described welding sequence;
3), after intensification preheating, describedly to be welded by welder on the welding post of described welding sequence at tape steel;
4), after welding, the described welded seam area at tape steel is corresponding respectively in the heat treatment station and spreading station of described welding sequence carries out the heat treatment of on-line continuous weld seam and the spreading of on-line continuous weld seam by annealing device and Roller compaction device.
By adding the preheating station that can carry out intensification preheating to the welding region at tape steel before welding post, like this, both welding stress can be reduced, weld strain speed can be reduced again, be conducive to the effusion of avoiding producing diffusible hydrogen in weld crack and weld metal, avoid producing hydrogen induced cracking, simultaneously, also the degree of hardening of weld dimensions can be reduced, and, also there is booster action to the cooling velocity slowing down postwelding; And by adding the heat treatment station can heat-treated the welded seam area at tape steel after welding post, like this, thick crystallization diffusion and the refinement of weld dimensions can be made, thus greatly increase the extensibility of weld seam.
In such scheme, the lower step operation of described welding sequence is fragility treatment process, the position of this fragility treatment process is provided with fragility treating apparatus, described fragility treating apparatus comprises subsidiary engine dolly and is arranged in the water box on described subsidiary engine dolly successively, annealing mechanism and recirculated water refrigeration machine, position in described water box and on described subsidiary engine dolly above corresponding described water box is respectively equipped with the cooling spray rapidly for cooling the welding region positive and negative at tape steel rapidly, described cooling spray is rapidly communicated with the delivery outlet of described recirculated water refrigeration machine, described water box is communicated with the input port of described recirculated water refrigeration machine, the heating-up temperature of described annealing mechanism is 500 ~ 650 DEG C, described annealing mechanism adopts high frequency induction heater.By the lower step process step design of welding sequence is become fragility treatment process, the fragility of 400 series stainless steels can be eliminated like this, thus further increasing plasticity and the extensibility of 400 series stainless steels.
In such scheme, described step 4) be specially:
4a) after welding, the described welded seam area at tape steel carries out on-line continuous weld seam normalized treatment by normalizing mechanism on the normalizing station of described welding sequence;
4b) after normalized treatment, the described welded seam area at tape steel carries out the spreading of on-line continuous weld seam by Roller compaction device on the spreading station of described welding sequence;
4c) after spreading, the described welded seam area at tape steel is carried out on-line continuous weld seam temper or carry out the process of on-line continuous weld seam fragility by described fragility treating apparatus on the position of described fragility treatment process on the tempering station of described welding sequence by tempering mechanism.
First, butt welded seam region adopts the heat treatment of normalizing process, like this, can make thick crystallization diffusion and the refinement of weld dimensions, thus greatly increase the extensibility of weld seam; Then, roll milling craft is adopted to the crystallization after diffusion and refinement, make it become more tight, thus further improve the extensibility of weld seam; Finally, butt welded seam region adopts the heat treatment of tempering process, make the refinement crystal crystallization again destroyed by spreading, thus further increasing the extensibility of weld seam again, or for 400 series stainless steels, after spreading, direct butt welded seam region adopts fragility process, eliminates the fragility of 400 series stainless steels, thus further increasing plasticity and the extensibility of 400 series stainless steels again.
In such scheme, step 4a) be specially:
4a1) after welding, the described welded seam area at tape steel carries out the normalizing of on-line continuous weld seam by a normalizing mechanism on a normalizing station of described welding sequence;
4a2) after a normalizing, the described welded seam area at tape steel carries out on-line continuous weld seam secondary normalizing by secondary normalizing mechanism on the secondary normalizing station of described welding sequence.
First adopted the heat treatment of a normalizing by postwelding butt welded seam region, the thick crystalline solid of weld dimensions can be made to be spread, and make it be evenly distributed, keep weld dimensions uniform temperature to be that secondary normalizing is prepared simultaneously; The heat treatment of secondary normalizing is adopted followed by butt welded seam region, the refinement of weld dimensions texture can be made, simultaneously through double normalizing, the strip welded seam area temperature making fabric width >=1000mm relatively evenly, balance, thus create a further reduction the degree of hardening of weld dimensions, improve metal extensibility.
In such scheme, the heating-up temperature of described preheating device is 150 ~ 200 DEG C, the heating-up temperature of a described normalizing mechanism is 650 ~ 800 DEG C, and the heating-up temperature of described secondary normalizing mechanism is 500 ~ 650 DEG C, and the heating-up temperature of described tempering mechanism is 300 ~ 400 DEG C.By the band steel according to concrete different model, the different interval preheat temperature of optimum choice, normalizing temperature, secondary normalizing temperature and a temperature, further can improve the extensibility of weld seam.
In such scheme, described preheating device, normalizing mechanism, secondary normalizing mechanism and a tempering mechanism all adopt high frequency induction heater, and the end face of the rolling wheel of described Roller compaction device is circular arc.Certainly, also other heaters can be adopted.By adopting end face to be the rolling wheel of circular arc, force localization when rolling can be made at welded seam area, thus the crystallization after normalizing can better be destroyed, making it tightr.
In such scheme, the process of described on-line continuous weld seam fragility is specially:
The described welded seam area at tape steel after spreading is down to normal temperature rapidly by described cooling spray rapidly on the station of cooling rapidly of described fragility treatment process;
Be down to the described welded seam area at tape steel after normal temperature and carry out annealing in process by described annealing mechanism on the annealing station of described fragility treatment process;
The described welded seam area at tape steel after annealing is down to normal temperature rapidly by described cooling spray rapidly again on the station of cooling rapidly of described fragility treatment process.
By adopting annealing in process to coordinate the technique cooled rapidly, eliminating 400 series stainless steels at 475 DEG C of interval friable tissues produced, thus further increasing plasticity and the extensibility of 400 series stainless steels; Meanwhile, once cooling rapidly by adding again before annealing in process, having ensured the uniformity of technique and welding quality.
The beneficial effect that technical scheme provided by the invention is brought is:
1, by carrying out intensification preheating to welding region before weldering, like this, both welding stress can be reduced, weld strain speed can be reduced again, be conducive to the effusion of avoiding producing diffusible hydrogen in weld crack and weld metal, avoid producing hydrogen induced cracking, simultaneously, also the degree of hardening of weld dimensions can be reduced, and, also there is booster action to the cooling velocity slowing down postwelding; And heat-treated by postwelding butt welded seam region, like this, thick crystallization diffusion and the refinement of weld dimensions can be made, thus greatly increase the extensibility of weld seam;
2, first, carry out normalized treatment by postwelding butt welded seam region, like this, thick crystallization diffusion and the refinement of weld dimensions can be made, thus greatly increase the extensibility of weld seam; Then, the crystallization after diffusion and refinement becomes more closely after Roller compaction device spreading, thus further improves the extensibility of weld seam; Finally, welded seam area, after temper, by the refinement crystal crystallization again that Roller compaction device spreading destroys, thus further increasing the extensibility of weld seam again;
3, carry out a normalizing by postwelding butt welded seam region, the thick crystalline solid of weld dimensions can be made to be spread, and make it be evenly distributed, keep weld dimensions uniform temperature to be that secondary normalizing is prepared simultaneously; Followed by secondary normalizing, the refinement of weld dimensions texture can be made, simultaneously through double normalizing, the strip welded seam area temperature making fabric width >=1000mm relatively evenly, balance, thus create a further reduction the degree of hardening of weld dimensions, improve metal extensibility;
4, by the band steel according to concrete different model, the different interval preheat temperature of optimum choice, normalizing temperature, secondary normalizing temperature and a temperature, further can improve the extensibility of weld seam;
5, by adopting end face to be the rolling wheel of circular arc, force localization when rolling can be made at welded seam area, thus the crystallization after normalizing can better be destroyed, making it tightr;
6, special for 400 series stainless steels, by adding fragility treating apparatus in the lower step procedure position of welding sequence, and substitute temper with fragility process, the fragility of 400 series stainless steels can be eliminated like this, thus further increasing plasticity and the extensibility of 400 series stainless steels;
7, by adding the preheating station that can carry out intensification preheating to the welding region at tape steel before welding post, like this, both welding stress can be reduced, weld strain speed can be reduced again, be conducive to the effusion of avoiding producing diffusible hydrogen in weld crack and weld metal, avoid producing hydrogen induced cracking, simultaneously, also the degree of hardening of weld dimensions can be reduced, and, also there is booster action to the cooling velocity slowing down postwelding; And by adding the heat treatment station can heat-treated the welded seam area at tape steel after welding post, like this, thick crystallization diffusion and the refinement of weld dimensions can be made, thus greatly increase the extensibility of weld seam;
8, by the lower step process step design of welding sequence is become fragility treatment process, the fragility of 400 series stainless steels can be eliminated like this, thus further increasing plasticity and the extensibility of 400 series stainless steels;
9, first, butt welded seam region adopts the heat treatment of normalizing process, like this, can make thick crystallization diffusion and the refinement of weld dimensions, thus greatly increase the extensibility of weld seam; Then, roll milling craft is adopted to the crystallization after diffusion and refinement, make it become more tight, thus further improve the extensibility of weld seam; Finally, butt welded seam region adopts the heat treatment of tempering process, make the refinement crystal crystallization again destroyed by spreading, thus further increasing the extensibility of weld seam again, or for 400 series stainless steels, after spreading, direct butt welded seam region adopts fragility process, eliminates the fragility of 400 series stainless steels, thus further increasing plasticity and the extensibility of 400 series stainless steels again;
10, first adopted the heat treatment of a normalizing by postwelding butt welded seam region, the thick crystalline solid of weld dimensions can be made to be spread, and make it be evenly distributed, keep weld dimensions uniform temperature to be that secondary normalizing is prepared simultaneously; The heat treatment of secondary normalizing is adopted followed by butt welded seam region, the refinement of weld dimensions texture can be made, simultaneously through double normalizing, the strip welded seam area temperature making fabric width >=1000mm relatively evenly, balance, thus create a further reduction the degree of hardening of weld dimensions, improve metal extensibility;
11, by adopting annealing in process to coordinate the technique cooled rapidly, eliminating 400 series stainless steels at 475 DEG C of interval friable tissues produced, thus further increasing plasticity and the extensibility of 400 series stainless steels;
12, once cool rapidly by adding again before annealing in process, ensured the uniformity of technique when welding 400 series stainless steel and welding quality.
The present invention have structure simple, can on-line continuous is heat-treated welding region and weld seam, technique is simple, welding good after the feature such as good-extensibility of weld dimensions.
Accompanying drawing explanation
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-looking structural representation 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 treating apparatus 7, subsidiary engine dolly 7a, water box 7b, annealing mechanism 7c, recirculated water refrigeration machine 7d, rapidly cooling spray 7e.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
This welding machine comprises two large divisions: welding portion (i.e. label parts 1 ~ 6) and subsidiary engine part (i.e. label parts 7); Accordingly, its welding procedure comprises welding sequence and fragility treatment process two large divisions.
Embodiment 1:
The heat treated resistance welder of a kind of band on-line continuous weld seam, comprise welding tractor 1, and the shear 2 be arranged on successively on described welding tractor 1, welder 3 and Roller compaction device 4, on described welding tractor 1, the position in corresponding described welder 3 front is provided with the preheating device 5 that can carry out on-line continuous intensification preheating to welding region, described preheating device 5 is arranged between described shear 2 and welder 3, on described welding tractor 1, the position at corresponding described welder 3 rear is provided with and can carries out the heat treated annealing device 6 of on-line continuous weld seam in butt welded seam region.Before welding, intensification preheating is carried out to welding region, like this, both welding stress can be reduced, weld strain speed can be reduced again, be conducive to the effusion of avoiding producing diffusible hydrogen in weld crack and weld metal, avoid producing hydrogen induced cracking, simultaneously, also the degree of hardening of weld dimensions can be reduced, and, also there is booster action to the cooling velocity slowing down postwelding; And heat-treated by postwelding butt welded seam region, like this, thick crystallization diffusion and the refinement of weld dimensions can be made, thus greatly increase the extensibility of weld seam.
Above-mentioned annealing device 6 comprises and can carry out the normalizing mechanism 6a of on-line continuous weld seam normalized treatment to described welded seam area and can carry out the tempering mechanism 6b of on-line continuous weld seam temper to described welded seam area, described normalizing mechanism 6a is arranged between described welder 3 and Roller compaction device 4, and described tempering mechanism 6b is arranged in described Roller compaction device 4 rear.First, carry out normalized treatment by postwelding butt welded seam region, like this, thick crystallization diffusion and the refinement of weld dimensions can be made, thus greatly increase the extensibility of weld seam; Then, the crystallization after diffusion and refinement becomes more closely after Roller compaction device 4 spreading, thus further improves the extensibility of weld seam; Finally, welded seam area, after temper, by the refinement crystal crystallization again that Roller compaction device 4 spreading destroys, thus further increasing the extensibility of weld seam again.Described normalizing mechanism 6a comprises again a normalizing mechanism 6a1 and secondary normalizing mechanism 6a2, and described secondary normalizing mechanism 6a2 is arranged in a described normalizing mechanism 6a1 rear.Carry out a normalizing by postwelding butt welded seam region, the thick crystalline solid of weld dimensions can be made to be spread, and make it be evenly distributed, keep weld dimensions uniform temperature to be that secondary normalizing is prepared simultaneously; Followed by secondary normalizing, the refinement of weld dimensions texture can be made, simultaneously through double normalizing, the strip welded seam area temperature making fabric width >=1000mm relatively evenly, balance, thus 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 150 ~ 200 DEG C, and the heating-up temperature of a described normalizing mechanism 6a1 is 650 ~ 800 DEG C, and the heating-up temperature of described secondary normalizing mechanism 6a2 is 500 ~ 650 DEG C, and the heating-up temperature of described tempering mechanism 6b is 300 ~ 400 DEG C.By the band steel according to concrete different model, the different interval preheat temperature of optimum choice, normalizing temperature, secondary normalizing temperature and a temperature, further can improve the extensibility of weld seam.Described preheating device 5, normalizing mechanism 6a1, a secondary normalizing mechanism 6a2 and tempering mechanism 6b all adopt high frequency induction heater, and the end face of the rolling wheel of described Roller compaction device 4 is circular arc.Certainly, also other heaters can be adopted.By adopting end face to be the rolling wheel of circular arc, force localization when rolling can be made at welded seam area, thus the crystallization after normalizing can better be destroyed, making it tightr; Described Roller compaction device 4 can also ensure smooth welded seam.
The lower step operation of the welding sequence of above-mentioned resistance welder is fragility treatment process, the position of this fragility treatment process is provided with fragility treating apparatus 7, described fragility treating apparatus 7 comprises subsidiary engine dolly 7a and is arranged in the water box 7b on described subsidiary engine dolly 7a successively, annealing mechanism 7c and recirculated water refrigeration machine 7d, position in described water box 7b and on described subsidiary engine dolly 7a above corresponding described water box 7b is respectively equipped with the 7e of cooling spray rapidly for cooling the welding region positive and negative at tape steel rapidly, the described 7e of cooling spray is rapidly communicated with the delivery outlet of described recirculated water refrigeration machine 7d, described water box 7b is communicated with the input port of described recirculated water refrigeration machine 7d, the heating-up temperature of described annealing mechanism 7c is 500 ~ 650 DEG C, described annealing mechanism 7c adopts high frequency induction heater.Special for 400 series stainless steels, by adding fragility treating apparatus 7 in the lower step procedure position of welding sequence, and substitute temper with fragility process, the fragility of 400 series stainless steels can be eliminated like this, thus further increasing plasticity and the extensibility of 400 series stainless steels.
The present embodiment is by carrying out intensification preheating to welding region before weldering, like this, both welding stress can be reduced, weld strain speed can be reduced again, be conducive to the effusion of avoiding producing diffusible hydrogen in weld crack and weld metal, avoid producing hydrogen induced cracking, simultaneously, also the degree of hardening of weld dimensions can be reduced, and, also there is booster action to the cooling velocity slowing down postwelding; And heat-treated by postwelding butt welded seam region, like this, thick crystallization diffusion and the refinement of weld dimensions can be made, thus greatly increase the extensibility of weld seam; First, carry out normalized treatment by postwelding butt welded seam region, like this, thick crystallization diffusion and the refinement of weld dimensions can be made, thus greatly increase the extensibility of weld seam; Then, the crystallization after diffusion and refinement becomes more closely after Roller compaction device 4 spreading, thus further improves the extensibility of weld seam; Finally, welded seam area, after temper, by the refinement crystal crystallization again that Roller compaction device 4 spreading destroys, thus further increasing the extensibility of weld seam again; Carry out a normalizing by postwelding butt welded seam region, the thick crystalline solid of weld dimensions can be made to be spread, and make it be evenly distributed, keep weld dimensions uniform temperature to be that secondary normalizing is prepared simultaneously; Followed by secondary normalizing, the refinement of weld dimensions texture can be made, simultaneously through double normalizing, the strip welded seam area temperature making fabric width >=1000mm relatively evenly, balance, thus create a further reduction the degree of hardening of weld dimensions, improve metal extensibility; By the band steel according to concrete different model, the different interval preheat temperature of optimum choice, normalizing temperature, secondary normalizing temperature and a temperature, further can improve the extensibility of weld seam; By adopting end face to be the rolling wheel of circular arc, force localization when rolling can be made at welded seam area, thus the crystallization after normalizing can better be destroyed, making it tightr; Special for 400 series stainless steels, by adding fragility treating apparatus 7 in the lower step procedure position of welding sequence, and substitute temper with fragility process, the fragility of 400 series stainless steels can be eliminated like this, thus further increasing plasticity and the extensibility of 400 series stainless steels.
Embodiment 2 (for high strength alloy steel and high phosphoretic steel etc., certainly, 400 series stainless steels also can adopt the scheme of the present embodiment, but it easily produces fragility):
The heat treated resistance welding technology of a kind of band on-line continuous weld seam, comprises the following steps:
1) on the shearing station of welding sequence, shearing piece is carried out by shear 2 at tape steel;
2) shear after piece, the described welding region at tape steel carries out on-line continuous intensification by preheating device 5 and is preheated to 150 ~ 200 DEG C on the preheating station of described welding sequence;
3), after intensification preheating, describedly to be welded by welder 3 on the welding post of described welding sequence at tape steel;
4a1) after welding, the described welded seam area at tape steel carries out the normalizing of on-line continuous weld seam by a normalizing mechanism 6a1 on a normalizing station of described welding sequence, and this normalizing temperature is 650 ~ 800 DEG C;
4a2) after a normalizing, the described welded seam area at tape steel carries out on-line continuous weld seam secondary normalizing by secondary normalizing mechanism 6a2 on the secondary normalizing station of described welding sequence, and this secondary normalizing temperature is 500 ~ 650 DEG C;
4b) after normalized treatment, the described welded seam area at tape steel carries out the spreading of on-line continuous weld seam by Roller compaction device 4 on the spreading station of described welding sequence;
4c) after spreading, the described welded seam area at tape steel carries out on-line continuous weld seam temper by tempering mechanism 6b on the tempering station of described welding sequence, and this temper temperature is 300 ~ 400 DEG C.
Above-mentioned preheating device 5, normalizing mechanism 6a1, a secondary normalizing mechanism 6a2 and tempering mechanism 6b all adopt high frequency induction heater, and the end face of the rolling wheel of described Roller compaction device 4 is circular arc.Certainly, also other heaters can be adopted.By adopting end face to be the rolling wheel of circular arc, force localization when rolling can be made at welded seam area, thus the crystallization after normalizing can better be destroyed, making it tightr.
The present embodiment by adding the preheating station that can carry out intensification preheating to the welding region at tape steel before welding post, like this, both welding stress can be reduced, weld strain speed can be reduced again, be conducive to the effusion of avoiding producing diffusible hydrogen in weld crack and weld metal, avoid producing hydrogen induced cracking, simultaneously, also the degree of hardening of weld dimensions can be reduced, and, also there is booster action to the cooling velocity slowing down postwelding; And by adding the heat treatment station can heat-treated the welded seam area at tape steel after welding post, like this, thick crystallization diffusion and the refinement of weld dimensions can be made, thus greatly increase the extensibility of weld seam; First, butt welded seam region adopts the heat treatment of normalizing process, like this, can make thick crystallization diffusion and the refinement of weld dimensions, thus greatly increase the extensibility of weld seam; Then, roll milling craft is adopted to the crystallization after diffusion and refinement, make it become more tight, thus further improve the extensibility of weld seam; Finally, butt welded seam region adopts the heat treatment of tempering process, makes the refinement crystal crystallization again destroyed by spreading, thus further increasing the extensibility of weld seam again; First adopted the heat treatment of a normalizing by postwelding butt welded seam region, the thick crystalline solid of weld dimensions can be made to be spread, and make it be evenly distributed, keep weld dimensions uniform temperature to be that secondary normalizing is prepared simultaneously; The heat treatment of secondary normalizing is adopted followed by butt welded seam region, the refinement of weld dimensions texture can be made, simultaneously through double normalizing, the strip welded seam area temperature making fabric width >=1000mm relatively evenly, balance, thus create a further reduction the degree of hardening of weld dimensions, improve metal extensibility; By the band steel according to concrete different model, the different interval preheat temperature of optimum choice, normalizing temperature, secondary normalizing temperature and a temperature, further can improve the extensibility of weld seam; By adopting end face to be the rolling wheel of circular arc, force localization when rolling can be made at welded seam area, thus the crystallization after normalizing can better be destroyed, making it tightr.
Embodiment 3 (special for 400 series stainless steels):
The heat treated resistance welding technology of a kind of band on-line continuous weld seam, comprises the following steps:
1) on the shearing station of welding sequence, shearing piece is carried out by shear 2 at tape steel;
2) shear after piece, the described welding region at tape steel carries out on-line continuous intensification by preheating device 5 and is preheated to 100 ~ 200 DEG C on the preheating station of described welding sequence;
3), after intensification preheating, describedly to be welded by welder 3 on the welding post of described welding sequence at tape steel;
4a1) after welding, the described welded seam area at tape steel carries out the normalizing of on-line continuous weld seam by a normalizing mechanism 6a1 on a normalizing station of described welding sequence, and this normalizing temperature is 600 ~ 800 DEG C;
4a2) after a normalizing, the described welded seam area at tape steel carries out on-line continuous weld seam secondary normalizing by secondary normalizing mechanism 6a2 on the secondary normalizing station of described welding sequence, and this secondary normalizing temperature is 600 ~ 800 DEG C;
4b) after normalized treatment, the described welded seam area at tape steel carries out the spreading of on-line continuous weld seam by Roller compaction device 4 on the spreading station of described welding sequence;
4c) after spreading, the described welded seam area at tape steel is down to normal temperature rapidly by the described 7e of cooling spray rapidly on the station of cooling rapidly of described fragility treatment process;
Be down to the described welded seam area at tape steel after normal temperature and carry out annealing in process by described annealing mechanism 7c on the annealing station of described fragility treatment process, this annealing temperature is 500 ~ 650 DEG C;
The described welded seam area at tape steel after annealing is down to normal temperature rapidly by the described 7e of cooling spray rapidly again on the station of cooling rapidly of described fragility treatment process.
Particularly, fragility treating apparatus 7 on the position of above-mentioned fragility treatment process comprises subsidiary engine dolly 7a and the water box 7b, the annealing mechanism 7c that are arranged in successively on described subsidiary engine dolly 7a and recirculated water refrigeration machine 7d, position in described water box 7b and on described subsidiary engine dolly 7a above corresponding described water box 7b is respectively equipped with the 7e of cooling spray rapidly for cooling the welding region positive and negative at tape steel rapidly, the described 7e of cooling spray is rapidly communicated with the delivery outlet of described recirculated water refrigeration machine 7d, and described water box 7b is communicated with the input port of described recirculated water refrigeration machine 7d.During initial position, weld seam is positioned at above described water box 7b, after first time cools rapidly, subsidiary engine dolly 7a is moved to the left, annealing mechanism 7c is positioned at below weld seam and carries out annealing in process, after annealing, subsidiary engine dolly 7a return to the right, make water box 7b get back to below weld seam, finally carry out second time again and cool rapidly.
Above-mentioned preheating device 5, normalizing mechanism 6a1, secondary normalizing mechanism 6a2 and an annealing mechanism 7c all adopt high frequency induction heater, and the end face of the rolling wheel of described Roller compaction device 4 is circular arc.Certainly, also other heaters can be adopted.By adopting end face to be the rolling wheel of circular arc, force localization when rolling can be made at welded seam area, thus the crystallization after normalizing can better be destroyed, making it tightr.
The present embodiment by adding the preheating station that can carry out intensification preheating to the welding region at tape steel before welding post, like this, both welding stress can be reduced, weld strain speed can be reduced again, be conducive to the effusion of avoiding producing diffusible hydrogen in weld crack and weld metal, avoid producing hydrogen induced cracking, simultaneously, also the degree of hardening of weld dimensions can be reduced, and, also there is booster action to the cooling velocity slowing down postwelding; And by adding the heat treatment station can heat-treated the welded seam area at tape steel after welding post, like this, thick crystallization diffusion and the refinement of weld dimensions can be made, thus greatly increase the extensibility of weld seam; By the lower step process step design of welding sequence is become fragility treatment process, the fragility of 400 series stainless steels can be eliminated like this, thus further increasing plasticity and the extensibility of 400 series stainless steels; First, butt welded seam region adopts the heat treatment of normalizing process, like this, can make thick crystallization diffusion and the refinement of weld dimensions, thus greatly increase the extensibility of weld seam; Then, roll milling craft is adopted to the crystallization after diffusion and refinement, make it become more tight, thus further improve the extensibility of weld seam; Finally, butt welded seam region adopts fragility process, eliminates the fragility of 400 series stainless steels, thus further increasing plasticity and the extensibility of 400 series stainless steels again; First adopted the heat treatment of a normalizing by postwelding butt welded seam region, the thick crystalline solid of weld dimensions can be made to be spread, and make it be evenly distributed, keep weld dimensions uniform temperature to be that secondary normalizing is prepared simultaneously; The heat treatment of secondary normalizing is adopted followed by butt welded seam region, the refinement of weld dimensions texture can be made, simultaneously through double normalizing, the strip welded seam area temperature making fabric width >=1000mm relatively evenly, balance, thus create a further reduction the degree of hardening of weld dimensions, improve metal extensibility; By adopting annealing in process to coordinate the technique cooled rapidly, eliminating 400 series stainless steels at 475 DEG C of interval friable tissues produced, thus further increasing plasticity and the extensibility of 400 series stainless steels; Once cooling rapidly by adding again before annealing in process, having ensured the uniformity of technique when welding 400 series stainless steel and welding quality; By the band steel according to concrete different model, the different interval preheat temperature of optimum choice, normalizing temperature, secondary normalizing temperature and a temperature, further can improve the extensibility of weld seam; By adopting end face to be the rolling wheel of circular arc, force localization when rolling can be made at welded seam area, thus the crystallization after normalizing can better be destroyed, making it tightr.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (13)
1. the heat treated resistance welder of band on-line continuous weld seam, comprise welding tractor (1), and the shear (2) be arranged on successively on described welding tractor (1), welder (3) and Roller compaction device (4), it is characterized in that, the position in upper corresponding described welder (3) front of described welding tractor (1) is provided with the preheating device (5) that can carry out on-line continuous intensification preheating to welding region, described preheating device (5) is arranged between described shear (2) and welder (3), the position at upper corresponding described welder (3) rear of described welding tractor (1) is provided with and can carries out the heat treated annealing device of on-line continuous weld seam (6) in butt welded seam region.
2. the heat treated resistance welder of band on-line continuous weld seam as claimed in claim 1, it is characterized in that, described annealing device (6) comprises and can carry out the normalizing mechanism (6a) of on-line continuous weld seam normalized treatment to described welded seam area and can carry out the tempering mechanism (6b) of on-line continuous weld seam temper to described welded seam area, described normalizing mechanism (6a) is arranged between described welder (3) and Roller compaction device (4), and described tempering mechanism (6b) is arranged in described Roller compaction device (4) rear.
3. the heat treated resistance welder of band on-line continuous weld seam as claimed in claim 2, it is characterized in that, described normalizing mechanism (6a) comprises again a normalizing mechanism (6a1) and secondary normalizing mechanism (6a2), and described secondary normalizing mechanism (6a2) is arranged in described normalizing mechanism (6a1) rear.
4. the heat treated resistance welder of band on-line continuous weld seam as claimed in claim 3, it is characterized in that, the heating-up temperature of described preheating device (5) is 150 ~ 200 DEG C, the heating-up temperature of a described normalizing mechanism (6a1) is 650 ~ 800 DEG C, the heating-up temperature of described secondary normalizing mechanism (6a2) is 500 ~ 650 DEG C, and the heating-up temperature of described tempering mechanism (6b) is 300 ~ 400 DEG C.
5. the heat treated resistance welder of band on-line continuous weld seam as claimed in claim 3, it is characterized in that, described preheating device (5), normalizing mechanism (6a1), secondary normalizing mechanism (6a2) and a tempering mechanism (6b) all adopt high frequency induction heater, and the end face of the rolling wheel of described Roller compaction device (4) is circular arc.
6. the heat treated resistance welder of band on-line continuous weld seam as claimed in claim 1, it is characterized in that, the lower step operation of the welding sequence of described resistance welder is fragility treatment process, the position of this fragility treatment process is provided with fragility treating apparatus (7), described fragility treating apparatus (7) comprises subsidiary engine dolly (7a) and is arranged in the water box (7b) on described subsidiary engine dolly (7a) successively, annealing mechanism (7c) and recirculated water refrigeration machine (7d), in described water box (7b) and the position of upper corresponding described water box (7b) top of described subsidiary engine dolly (7a) is respectively equipped with the cooling spray rapidly (7e) for cooling rapidly at the welding region positive and negative of tape steel, described cooling spray rapidly (7e) is communicated with the delivery outlet of described recirculated water refrigeration machine (7d), described water box (7b) is communicated with the input port of described recirculated water refrigeration machine (7d), the heating-up temperature of described annealing mechanism (7c) is 500 ~ 650 DEG C, described annealing mechanism (7c) adopts high frequency induction heater.
7. be with the heat treated resistance welding technology of on-line continuous weld seam, it is characterized in that, comprise the following steps:
1) on the shearing station of welding sequence, shearing piece is carried out by shear (2) at tape steel;
2) shear after piece, the described welding region at tape steel carries out on-line continuous intensification preheating by preheating device (5) on the preheating station of described welding sequence;
3), after intensification preheating, describedly to be welded by welder (3) on the welding post of described welding sequence at tape steel;
4), after welding, the described welded seam area at tape steel is corresponding respectively in the heat treatment station and spreading station of described welding sequence carries out the heat treatment of on-line continuous weld seam and the spreading of on-line continuous weld seam by annealing device (6) and Roller compaction device (4).
8. the heat treated resistance welding technology of band on-line continuous weld seam as claimed in claim 7, it is characterized in that, the lower step operation of described welding sequence is fragility treatment process, the position of this fragility treatment process is provided with fragility treating apparatus (7), described fragility treating apparatus (7) comprises subsidiary engine dolly (7a) and is arranged in the water box (7b) on described subsidiary engine dolly (7a) successively, annealing mechanism (7c) and recirculated water refrigeration machine (7d), in described water box (7b) and the position of upper corresponding described water box (7b) top of described subsidiary engine dolly (7a) is respectively equipped with the cooling spray rapidly (7e) for cooling rapidly at the welding region positive and negative of tape steel, described cooling spray rapidly (7e) is communicated with the delivery outlet of described recirculated water refrigeration machine (7d), described water box (7b) is communicated with the input port of described recirculated water refrigeration machine (7d), the heating-up temperature of described annealing mechanism (7c) is 500 ~ 650 DEG C, described annealing mechanism (7c) adopts high frequency induction heater.
9. the heat treated resistance welding technology of band on-line continuous weld seam as claimed in claim 8, is characterized in that, described step 4) be specially:
4a) after welding, the described welded seam area at tape steel carries out on-line continuous weld seam normalized treatment by normalizing mechanism (6a) on the normalizing station of described welding sequence;
4b) after normalized treatment, the described welded seam area at tape steel carries out the spreading of on-line continuous weld seam by Roller compaction device (4) on the spreading station of described welding sequence;
4c) after spreading, the described welded seam area at tape steel is carried out on-line continuous weld seam temper by tempering mechanism (6b) or carried out the process of on-line continuous weld seam fragility by described fragility treating apparatus (7) on the position of described fragility treatment process on the tempering station of described welding sequence.
10. the heat treated resistance welding technology of band on-line continuous weld seam as claimed in claim 9, is characterized in that, step 4a) be specially:
4a1) after welding, the described welded seam area at tape steel carries out the normalizing of on-line continuous weld seam by a normalizing mechanism (6a1) on a normalizing station of described welding sequence;
4a2) after a normalizing, the described welded seam area at tape steel carries out on-line continuous weld seam secondary normalizing by secondary normalizing mechanism (6a2) on the secondary normalizing station of described welding sequence.
11. are with the heat treated resistance welding technology of on-line continuous weld seam as claimed in claim 10, it is characterized in that, the heating-up temperature of described preheating device (5) is 150 ~ 200 DEG C, the heating-up temperature of a described normalizing mechanism (6a1) is 650 ~ 800 DEG C, the heating-up temperature of described secondary normalizing mechanism (6a2) is 500 ~ 650 DEG C, and the heating-up temperature of described tempering mechanism (6b) is 300 ~ 400 DEG C.
12. are with the heat treated resistance welding technology of on-line continuous weld seam as claimed in claim 10, it is characterized in that, described preheating device (5), normalizing mechanism (6a1), secondary normalizing mechanism (6a2) and a tempering mechanism (6b) all adopt high frequency induction heater, and the end face of the rolling wheel of described Roller compaction device (4) is circular arc.
13. are with the heat treated resistance welding technology of on-line continuous weld seam as claimed in claim 9, and it is characterized in that, the process of described on-line continuous weld seam fragility is specially:
The described welded seam area at tape steel after spreading is down to normal temperature rapidly by described cooling spray rapidly (7e) on the station of cooling rapidly of described fragility treatment process;
Be down to the described welded seam area at tape steel after normal temperature and carry out annealing in process by described annealing mechanism (7c) on the annealing station of described fragility treatment process;
The described welded seam area at tape steel after annealing is down to normal temperature rapidly by described cooling spray rapidly (7e) again on the station of cooling rapidly of described fragility treatment process.
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