CN106346122A - Resistance welding technology with online continuous weld heat treatment - Google Patents

Resistance welding technology with online continuous weld heat treatment Download PDF

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Publication number
CN106346122A
CN106346122A CN201510413405.2A CN201510413405A CN106346122A CN 106346122 A CN106346122 A CN 106346122A CN 201510413405 A CN201510413405 A CN 201510413405A CN 106346122 A CN106346122 A CN 106346122A
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China
Prior art keywords
welding
normalizing
weld seam
strip steel
line continuous
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CN201510413405.2A
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Chinese (zh)
Inventor
陈俊
熊辉
桂敏敏
张同德
张炼
芦洪波
殷明
芦立楷
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WUHAN KAIQI SPECIAL WELDING EQUIPMENT CO Ltd
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WUHAN KAIQI SPECIAL WELDING EQUIPMENT CO Ltd
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Priority to CN201510413405.2A priority Critical patent/CN106346122A/en
Publication of CN106346122A publication Critical patent/CN106346122A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00Resistance welding; Severing by resistance heating
    • B23K11/002Resistance welding; Severing by resistance heating specially adapted for particular articles or work
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00Resistance welding; Severing by resistance heating
    • B23K11/08Seam welding not restricted to one of the preceding subgroups
    • B23K11/087Seam welding not restricted to one of the preceding subgroups for rectilinear seams
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00Resistance welding; Severing by resistance heating
    • B23K11/16Resistance welding; Severing by resistance heating taking account of the properties of the material to be welded
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00Resistance welding; Severing by resistance heating
    • B23K11/36Auxiliary equipment

Abstract

The invention discloses a resistance welding technology with online continuous weld heat treatment. The method comprises the following steps: (1) The online strip steel is sheared and seamed in the shearing station of the welding process. (2) After shearing and seaming, the welding area of the online strip steel is online continuously preheated by the preheating device in the preheating station of the welding process. (3) After preheating, the online strip steel is welded in the welding station of the welding process. (4) After welding, the welding area of online strip steel is online continuously welded and normalized by the normalizing mechanism in the normalizing station of the welding process. (5) After normalizing, the welding area of the online strip steel is online continuously welded and rolled by the rolling device in the rolling station of the welding process. (6) After rolling, the welding area of the online strip steel is online continuously welded and tempered by the tempering mechanism in the tempering station of the welding process or online continuously welded and taken brittle processing by the brittle processing device in the brittle processing station of the brittle processing process. The resistance welding technology with online continuous weld heat treatment is suitable for welding.

Description

Resistance welding technology with on-line continuous weld seam heat treatment
Technical field
The present invention relates to welding field, particularly to a kind of electric resistance welding with on-line continuous weld seam heat treatment Connect technique.
Background technology
With China's automobile, bridge, building, household electrical appliances etc., iron and steel is had wilderness demand industry swift and violent Development, iron and steel enterprise requires also more and more higher to the yield and quality of high standard and the steel of high performance-price ratio. At present, most domestic iron and steel enterprise gradually moves towards product transformation, the trend of equipment upgrading.Therefore, The welding of special rolling-mill section is the significant problem that we will face, but using common resistance welding technology Special substance steel grade, particularly 400 series stainless steels, high strength alloy steel and height cannot be met at all The welding requirements of phosphoretic steel etc., specifically:
1st, because temperature during resistance welding is very high, so this welding process can make welding region temperature Degree suddenly rises, declines, and causes weld dimensions to form quenching, and the weld seam after quenching And irregular thick crystallization substantially (particularly 400 series stainless steels, high-strength for heat affected area Degree steel alloy and high-phosphorus iron ore etc.), so, once weld dimensions stress arises that fracture;
2nd, because welding region is larger with temperature difference during welding before welding, so easy produce welding Stress, meanwhile, because weld strain speed is higher, so easily produce weld crack and because of weld metal The effusion of middle diffusible hydrogen and the hydrogen induced cracking that leads to, and, weld dimensions harden degree relatively High.
Content of the invention
The invention aims to overcoming the shortcomings of above-mentioned background technology, provide a kind of weld seam extensibility The good resistance welding technology with on-line continuous weld seam heat treatment.
In order to realize object above, a kind of resistance with on-line continuous weld seam heat treatment that the present invention provides Welding procedure, 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 finishes, the welding region of described online strip steel is in the preheating of described welding sequence On station, on-line continuous intensification preheating is carried out by preheating device;
3) heat up after preheating, described online strip steel passes through resistance on the welding post of described welding sequence Welder is welded;
After 4a) welding finishes, the welded seam area of described online strip steel is in the positive firer of described welding sequence On position, on-line continuous weld seam normalized treatment is carried out by normalizing mechanism;
After 4b) normalized treatment finishes, the welded seam area of described online strip steel is in the rolling of described welding sequence On pressure station, on-line continuous weld seam spreading is carried out by Roller compaction device;
After 4c) spreading finishes, the welded seam area of described online strip steel is in the Temperer of described welding sequence Carry out on-line continuous weld seam temper or on the position of fragility treatment process by being tempered mechanism on position Carry out on-line continuous weld seam fragility by fragility processing meanss to process, described fragility treatment process is described The lower step operation of welding sequence.
By adding before welding post, the welding region of online strip steel can be carried out with the preheating of preheating that heats up Station, so, both can reduce welding stress, can reduce weld strain speed again, be conducive to avoiding producing The effusion of diffusible hydrogen in raw weld crack and weld metal, it is to avoid produce hydrogen induced cracking, also may be used meanwhile Reduce the degree of hardening of weld dimensions, and, also the rate of cooling slowing down postwelding is had auxiliary Help effect;And heat treatment can be carried out to the welded seam area of online strip steel by adding after welding post Heat treatment station, so, can make the thick crystallization diffusion of weld dimensions and refine, thus greatly The earth improves the extensibility of weld seam;By the lower step process step design of welding sequence is become science and engineering at fragility Sequence, so can eliminate the fragility of 400 series stainless steels, thus further increasing 400 series not The plasticity of rust steel and extensibility;
First, first, to welded seam area adopt normalizing process heat treatment, so, can make weld seam and The thick crystallization diffusion of heat affected area and refinement, thus greatly increase the extensibility of weld seam;Then, To the crystallization after diffusion and refinement using roll milling craft so as to become even closer, thus further Improve the extensibility of weld seam;Finally, to welded seam area adopt tempering process heat treatment, make by The refinement crystal that spreading destroys crystallizes again, thus yet further improve the extensibility of weld seam, or For 400 series stainless steels, after spreading, directly fragility is adopted to process welded seam area, eliminating 400 is Arrange stainless fragility, thus yet further improve plasticity and the extensibility of 400 series stainless steels.
In such scheme, described fragility processing meanss include subsidiary engine dolly and are sequentially arranged in described Water box on subsidiary engine dolly, annealing mechanism and circulation water refrigerating machine, in described water box and described auxiliary Position above corresponding described water box on machine dolly is respectively provided with the weldering being rapidly cooled in tape steel Connect the rapidly cooling spray of region positive and negative, described rapidly cooling spray and described circulation water refrigerating machine Delivery outlet connects, and described water box is connected with the input port of described circulation water refrigerating machine.By welding The lower step process step design of operation becomes fragility treatment process, so can eliminate the fragility of 400 series stainless steels, Thus further increasing plasticity and the extensibility of 400 series stainless steels.
In such scheme, the heating-up temperature of described annealing mechanism is 500~650 DEG C.
In such scheme, described annealing mechanism adopts high frequency induction heater.
In such scheme, step 4a) particularly as follows:
After 4a1) welding finishes, the welded seam area of described online strip steel in described welding sequence once just On firer position, the normalizing of on-line continuous weld seam is carried out by a normalizing mechanism;
After 4a2) normalizing finishes, the welded seam area of described online strip steel is the two of described welding sequence On secondary normalizing station, on-line continuous weld seam secondary normalizing is carried out by secondary normalizing mechanism.
By postwelding, welded seam area is first adopted with the heat treatment of a normalizing, weld dimensions can be made Thick crystalline solid spread, and so that it is evenly distributed, keep weld dimensions certain simultaneously Temperature is prepared for secondary normalizing;Followed by the heat treatment that welded seam area is adopted with secondary normalizing, Weld dimensions texture can be made to refine, simultaneously through double normalizing, make fabric width >=1000mm Strip welded seam area temperature than more uniform, balance, thus create a further reduction weld seam and heat affecting The degree of hardening in area, improves metal extensibility.
In such scheme, the heating-up temperature of described preheating device is 150~200 DEG C, a described normalizing The heating-up temperature of mechanism is 650~800 DEG C, and the heating-up temperature of described secondary normalizing mechanism is 500~650 DEG C, The heating-up temperature of described tempering mechanism is 300~400 DEG C.By the strip steel according to concrete different model, excellent Change and select different interval preheating temperatures, normalizing temperature, secondary normalizing temperature and temperature, The extensibility of weld seam can further be improved.
In such scheme, described preheating device, normalizing mechanism, secondary normalizing mechanism and tempering Mechanism is all using high frequency induction heater.
In such scheme, the end face of the rolling wheel of described Roller compaction device is circular arc.By adopting end Face is the rolling wheel of circular arc, can make force localization when rolling in welded seam area, so as to more preferable Destroy crystallization after normalizing so as to even closer.
In such scheme, described on-line continuous weld seam fragility process particularly as follows:
The welded seam area of the described online strip steel after spreading is in the rapidly bosher of described fragility treatment process On position, room temperature is rapidly down to by described rapidly cooling spray;
It is down to the lehr attendant in described fragility treatment process for the welded seam area of the described online strip steel after room temperature Made annealing treatment by described annealing mechanism on position;
The welded seam area of the described online strip steel after annealing is again in the rapidly cooling of described fragility treatment process On station, room temperature is rapidly down to by described rapidly cooling spray.
By using the annealing technique that rapidly cools down of cooperation, eliminating 400 series stainless steels 475 DEG C interval friable tissues producing, thus further increasing the plasticity of 400 series stainless steels and prolonging Stretching property;Meanwhile, by cool down once again plus rapidly, having ensured technique and welding matter before annealing The uniformity of amount.
The technical scheme that the present invention provides has the benefit that
1st, pass through to add before welding post the welding region of online strip steel can be carried out with the pre- of preheating of heating up Thermal technology position, so, both can reduce welding stress, can reduce weld strain speed again, and be conducive to avoiding Produce the effusion of 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 reduced, and, also the rate of cooling slowing down postwelding is had Assosting effect;And heat treatment can be carried out to the welded seam area of online strip steel by adding after welding post Heat treatment station, so, the thick crystallization diffusion of weld dimensions can be made and refine, thus Greatly increase the extensibility of weld seam;
2nd, by the lower step process step design of welding sequence is become fragility treatment process, 400 can so be eliminated The fragility of series stainless steel, thus further increasing plasticity and the extensibility of 400 series stainless steels;
3rd, first, welded seam area is adopted with the heat treatment of normalizing process, so, weld seam and hot shadow can be made Ring the thick crystallization diffusion in area and refine, thus greatly increasing the extensibility of weld seam;Then, right Crystallization after diffusion and refinement using roll milling craft so as to become even closer, thus further Improve the extensibility of weld seam;Finally, welded seam area is adopted with the heat treatment of tempering process, makes to be rolled over Crush bad refinement crystal to crystallize again, thus yet further improve the extensibility of weld seam, or pin To 400 series stainless steels, after spreading, directly adopt fragility to process welded seam area, eliminate 400 series Stainless fragility, thus yet further improve plasticity and the extensibility of 400 series stainless steels;
4th, pass through the heat treatment that postwelding first adopts a normalizing to welded seam area, weld seam and heat affecting can be made The thick crystalline solid in area is spread, and so that it is evenly distributed, and keeps weld dimensions one simultaneously Constant temperature degree is prepared for secondary normalizing;Followed by the heat treatment that welded seam area is adopted with secondary normalizing, Weld dimensions texture can be made to refine, simultaneously through double normalizing, make fabric width >=1000mm Strip welded seam area temperature than more uniform, balance, thus create a further reduction weld seam and heat affecting The degree of hardening in area, improves metal extensibility;
5th, the technique passing through rapidly to be cooled down using annealing cooperation, is eliminated 400 series stainless steels and exists 475 DEG C of interval friable tissues producing, thus further increasing 400 series stainless steels plasticity and Extensibility;
6th, pass through to add again before annealing once rapidly to cool down, ensured stainless in welding 400 series Technique during steel and the uniformity of welding quality.
The present invention has and on-line continuous can carry out heat treatment, process is simple, weldering to welding region and weld seam Connect rear weld dimensions good-extensibility the features such as.
Brief description
Fig. 1 is the structural representation of welding portion in the present invention;
Fig. 2 is the structural representation of subsidiary engine part in the present invention;
Fig. 3 is the side structure schematic view of Fig. 2.
In figure, welding tractor 1, shear 2, 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 dolly 7a, water box 7b, annealing mechanism 7c, follow Ring water refrigerating machine 7d, rapidly cooling spray 7e.
Specific embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to this Invention embodiment is described in further detail.
Welding machine in the present embodiment includes two large divisions: welding portion (i.e. label part 1~6) and subsidiary engine Partly (i.e. label part 7);Accordingly, its welding procedure includes 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 pacifies successively It is contained in shear 2 on described welding tractor 1, welder 3 and Roller compaction device 4, described On welding tractor 1, the position in the described welder of correspondence 3 front is provided with and welding region can be carried out The preheating device 5 of on-line continuous intensification preheating, described preheating device 5 is arranged in described shear 2 He Between welder 3, corresponding described welder 3 rear on described welding tractor 1 Position is provided with the annealing device 6 that welded seam area can be carried out with on-line continuous weld seam heat treatment.Before weldering Welding region is carried out with the preheating that heats up, so, both can reduce welding stress, weld strain can be reduced again Speed, is conducive to the effusion avoiding producing diffusible hydrogen in weld crack and weld metal, it is to avoid produce hydrogen Fracturing stricture of vagina, also can reduce the degree of hardening of weld dimensions meanwhile, and, also to slowing down weldering Rate of cooling afterwards has assosting effect;And heat treatment is carried out to welded seam area by postwelding, so, The thick crystallization diffusion of weld dimensions can be made and refine, thus greatly increasing prolonging of weld seam Stretching property.
Above-mentioned annealing device 6 includes described welded seam area can be carried out with on-line continuous weld seam normalized treatment Normalizing mechanism 6a and described welded seam area can be carried out with the tempering mechanism of on-line continuous weld seam temper 6b, described normalizing mechanism 6a is arranged between described welder 3 and Roller compaction device 4, described Tempering mechanism 6b is arranged in described Roller compaction device 4 rear.First, by postwelding, welded seam area is carried out Normalized treatment, so, can make the thick crystallization diffusion of weld dimensions and refine, thus significantly Improve the extensibility of weld seam;Then, the crystallization after spreading and refine is after Roller compaction device 4 spreading Become even closer, thus further improve the extensibility of weld seam;Finally, welded seam area warp After crossing temper, the refinement crystal being destroyed by Roller compaction device 4 spreading crystallizes again, thus entering one again Improve to step the extensibility of weld seam.Described normalizing mechanism 6a includes a normalizing mechanism 6a1 and two again Secondary normalizing mechanism 6a2, described secondary normalizing mechanism 6a2 are arranged in a described normalizing mechanism 6a1 rear. Normalizing is carried out by postwelding to welded seam area, the thick crystalline solid of weld dimensions can be made to obtain To diffusion, and so that it is evenly distributed, keep weld dimensions uniform temperature to be secondary normalizing simultaneously Prepare;Followed by secondary normalizing, weld dimensions texture can be made to refine, simultaneously Through double normalizing, make the strip welded seam area temperature of fabric width >=1000mm than more uniform, balance, from And create a further reduction the degree of hardening of weld dimensions, improve metal extensibility.
The heating-up temperature of above-mentioned preheating device 5 is 150~200 DEG C, and a described normalizing mechanism 6a1 adds Hot temperature is 650~800 DEG C, and the heating-up temperature of described secondary normalizing mechanism 6a2 is 500~650 DEG C, institute The heating-up temperature stating tempering mechanism 6b is 300~400 DEG C.By the strip steel according to concrete different model, The different interval preheating temperature of optimized choice, normalizing temperature, secondary normalizing temperature and temperature, The extensibility of weld seam can further be improved.Described 5, normalizing mechanism 6a1 of preheating device, two Secondary normalizing mechanism 6a2 and tempering mechanism 6b all using high frequency induction heater, described Roller compaction device 4 The end face of rolling wheel is circular arc.Certainly, other heaters may also be employed.By being circle using end face The rolling wheel of arc, can make force localization when rolling in welded seam area, destroy so as to more preferable Crystallization after normalizing is so as to even closer;Described Roller compaction 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, science and engineering at this fragility The position of sequence is provided with fragility processing meanss 7, described fragility processing meanss 7 include subsidiary engine dolly 7a with And it is sequentially arranged in water box 7b, the annealing mechanism 7c on described subsidiary engine dolly 7a and recirculated water refrigeration Position in machine 7d, described water box 7b and above corresponding described water box 7b on described subsidiary engine dolly 7a Put the rapidly cooling spray 7e being respectively provided with the welding region positive and negative being rapidly cooled in tape steel, Described rapidly cooling spray 7e is connected with the delivery outlet of described circulation water refrigerating machine 7d, described water box 7b is connected with the input port of described circulation water refrigerating machine 7d, and the heating-up temperature of described annealing mechanism 7c is 500~650 DEG C, described annealing mechanism 7c adopts high frequency induction heater.Special stainless for 400 series Steel, by adding fragility processing meanss 7 in the lower step procedure position of welding sequence, and is processed with fragility Substitute temper, so can eliminate the fragility of 400 series stainless steels, thus further increasing The plasticity of 400 series stainless steels and extensibility.
, by welding region is carried out before weldering with the preheating that heats up, so, both can reduce welding should for the present embodiment Power, can reduce weld strain speed again, be conducive to avoiding producing in weld crack and weld metal spreading The effusion of hydrogen, it is to avoid produce hydrogen induced cracking, also can reduce the journey of hardening of weld dimensions meanwhile Degree, and, also there is assosting effect to the rate of cooling slowing down postwelding;And by postwelding to weld metal zone Domain carries out heat treatment, so, can make the thick crystallization diffusion of weld dimensions and refine, thus Greatly increase the extensibility of weld seam;First, normalized treatment is carried out to welded seam area by postwelding, So, the thick crystallization diffusion of weld dimensions can be made and refine, thus greatly increasing weldering The extensibility of seam;Then, the crystallization after spreading and refine becomes more to step up after Roller compaction device 4 spreading Close, thus further improve the extensibility of weld seam;Finally, welded seam area is through temper Afterwards, the refinement crystal being destroyed by Roller compaction device 4 spreading crystallizes again, thus yet further improve The extensibility of weld seam;Normalizing is carried out to welded seam area by postwelding, weld dimensions can be made Thick crystalline solid spread, and so that it is evenly distributed, keep weld dimensions certain simultaneously Temperature is prepared for secondary normalizing;Followed by secondary normalizing, weld dimensions crystal can be made Structure refinement, simultaneously through double normalizing, makes the strip welded seam area temperature of fabric width >=1000mm compare Uniformly, balancing, thus create a further reduction the degree of hardening of weld dimensions, improve gold Belong to extensibility;By the strip steel according to concrete different model, the different interval preheating temperature of optimized choice, Normalizing temperature, secondary normalizing temperature and temperature, can further improve the extension of weld seam Property;By being the rolling wheel of circular arc using end face, force localization when rolling can be made in weld metal zone Domain, destroys the crystallization after normalizing so as to even closer so as to more preferable;Special serial for 400 Rustless steel, by adding fragility processing meanss 7 in the lower step procedure position of welding sequence, and uses fragility Processing and substitute temper, so eliminating the fragility of 400 series stainless steels, thus further carrying The high plasticity of 400 series stainless steels and extensibility.
Embodiment 2 (for high strength alloy steel and high-phosphorus iron ore etc., certainly, also may be used by 400 series stainless steels Using the scheme of the present embodiment, but it is also easy to produce fragility):
A kind of 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 finishes, the welding region of described online strip steel is in the preheating of described welding sequence On station, on-line continuous intensification is carried out by preheating device 5 and be preheated to 150~200 DEG C;
3) heat up after preheating, described online strip steel passes through resistance on the welding post of described welding sequence Welder 3 is welded;
After 4a1) welding finishes, the welded seam area of described online strip steel in described welding sequence once just On firer position, the normalizing of on-line continuous weld seam is carried out by a normalizing mechanism 6a1, this normalizing Temperature is 650~800 DEG C;
After 4a2) normalizing finishes, the welded seam area of described online strip steel is the two of described welding sequence On secondary normalizing station, on-line continuous weld seam secondary normalizing is carried out by secondary normalizing mechanism 6a2, this is secondary Normalizing temperature is 500~650 DEG C;
After 4b) normalized treatment finishes, the welded seam area of described online strip steel is in the rolling of described welding sequence On pressure station, on-line continuous weld seam spreading is carried out by Roller compaction device 4;
After 4c) spreading finishes, the welded seam area of described online strip steel is in the Temperer of described welding sequence Carry out on-line continuous weld seam temper by being tempered mechanism 6b, this temper temperature is on position 300~400 DEG C.
Above-mentioned preheating device 5, normalizing mechanism 6a1, a secondary normalizing mechanism 6a2 and tempering mechanism 6b All using high frequency induction heater, the end face of the rolling wheel of described Roller compaction device 4 is circular arc.Certainly, Other heater may also be employed.By being the rolling wheel of circular arc using end face, work when rolling can be made Firmly concentrate on welded seam area, destroy the crystallization after normalizing so as to even closer so as to more preferable.
The present embodiment passes through to add before welding post and the welding region of online strip steel can be carried out heat up in advance The preheating station of heat, so, both can reduce welding stress, can reduce weld strain speed, favorably again In the effusion avoiding diffusible hydrogen in generation weld crack and weld metal, it is to avoid produce hydrogen induced cracking, with When, also can reduce the degree of hardening of weld dimensions, and, also to the cooling speed slowing down postwelding Degree has assosting effect;And the welded seam area of online strip steel can be carried out by adding after welding post The heat treatment station of heat treatment, so, can make the thick crystallization diffusion of weld dimensions and refine, Thus greatly increasing the extensibility of weld seam;First, welded seam area is adopted at the heat of normalizing process Reason, so, can make the thick crystallization diffusion of weld dimensions and refine, thus greatly improving The extensibility of weld seam;Then, to the crystallization after diffusion and refinement using roll milling craft so as to become Even closer, thus further improve the extensibility of weld seam;Finally, welded seam area is adopted The heat treatment of tempering process, makes the refinement crystal being destroyed by spreading crystallize again, thus yet further Improve the extensibility of weld seam;By postwelding, welded seam area is first adopted with the heat treatment of a normalizing, can So that the thick crystalline solid of weld dimensions is spread, and so that it is evenly distributed, keep weldering simultaneously Seam and heat affected area uniform temperature are prepared for secondary normalizing;Adopt two followed by welded seam area The heat treatment of secondary normalizing, can make weld dimensions texture refine, simultaneously through double normalizing, Make the strip welded seam area temperature of fabric width >=1000mm than more uniform, balance, thus further reducing The degree of hardening of weld dimensions, improves metal extensibility;By according to concrete different shaped Number strip steel, the different interval preheating temperature of optimized choice, normalizing temperature, a secondary normalizing temperature And temperature, can further improve the extensibility of weld seam;By being circular arc using end face Rolling wheel, can make force localization when rolling in welded seam area, destroy through normalizing so as to more preferable Rear crystallization is so as to even closer.
Embodiment 3 (spy is directed to 400 series stainless steels):
A kind of 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 finishes, the welding region of described online strip steel is in the preheating of described welding sequence On station, on-line continuous intensification is carried out by preheating device 5 and be preheated to 100~200 DEG C;
3) heat up after preheating, described online strip steel passes through resistance on the welding post of described welding sequence Welder 3 is welded;
After 4a1) welding finishes, the welded seam area of described online strip steel in described welding sequence once just On firer position, the normalizing of on-line continuous weld seam is carried out by a normalizing mechanism 6a1, this normalizing Temperature is 600~800 DEG C;
After 4a2) normalizing finishes, the welded seam area of described online strip steel is the two of described welding sequence On secondary normalizing station, on-line continuous weld seam secondary normalizing is carried out by secondary normalizing mechanism 6a2, this is secondary Normalizing temperature is 600~800 DEG C;
After 4b) normalized treatment finishes, the welded seam area of described online strip steel is in the rolling of described welding sequence On pressure station, on-line continuous weld seam spreading is carried out by Roller compaction device 4;
After 4c) spreading finishes, the welded seam area of described online strip steel is in the urgency of described fragility treatment process In fast cooling station, room temperature is rapidly down to by described rapidly cooling spray 7e;
It is down to the lehr attendant in described fragility treatment process for the welded seam area of the described online strip steel after room temperature Made annealing treatment by described annealing mechanism 7c on position, this annealing temperature is 500~650 DEG C;
The welded seam area of the described online strip steel after annealing is again in the rapidly cooling of described fragility treatment process On station, room temperature is rapidly down to by described rapidly cooling spray 7e.
Specifically, the fragility processing meanss 7 on the position of above-mentioned fragility treatment process include subsidiary engine dolly 7a and be sequentially arranged in water box 7b, the annealing mechanism 7c on described subsidiary engine dolly 7a and recirculated water In refrigeration machine 7d, described water box 7b and above corresponding described water box 7b on described subsidiary engine dolly 7a Position be respectively provided with the rapidly cooling spray of the welding region positive and negative being rapidly cooled in tape steel 7e, described rapidly cooling spray 7e are connected with the delivery outlet of described circulation water refrigerating machine 7d, described are filled with water Case 7b is connected with the input port of described circulation water refrigerating machine 7d.During initial position, weld seam is located at described Above water box 7b, after rapidly cooling finishes for the first time, subsidiary engine dolly 7a is moved to the left, and makes annealing Mechanism 7c is located at and is made annealing treatment below weld seam, after annealing finishes, subsidiary engine dolly 7a return to the right, So that water box 7b is returned to below weld seam, finally rapidly cooled down for the second time again.
Above-mentioned preheating device 5, normalizing mechanism 6a1, a secondary normalizing mechanism 6a2 and annealing mechanism 7c All using high frequency induction heater, the end face of the rolling wheel of described Roller compaction device 4 is circular arc.Certainly, Other heater may also be employed.By being the rolling wheel of circular arc using end face, work when rolling can be made Firmly concentrate on welded seam area, destroy the crystallization after normalizing so as to even closer so as to more preferable.
The present embodiment passes through to add before welding post and the welding region of online strip steel can be carried out heat up in advance The preheating station of heat, so, both can reduce welding stress, can reduce weld strain speed, favorably again In the effusion avoiding diffusible hydrogen in generation weld crack and weld metal, it is to avoid produce hydrogen induced cracking, with When, also can reduce the degree of hardening of weld dimensions, and, also to the cooling speed slowing down postwelding Degree has assosting effect;And the welded seam area of online strip steel can be carried out by adding after welding post The heat treatment station of heat treatment, so, can make the thick crystallization diffusion of weld dimensions and refine, Thus greatly increasing the extensibility of weld seam;By the lower step process step design of welding sequence is become fragility Treatment process, so can eliminate the fragility of 400 series stainless steels, thus further increasing 400 The plasticity of series stainless steel and extensibility;First, welded seam area is adopted with the heat treatment of normalizing process, So, the thick crystallization diffusion of weld dimensions can be made and refine, thus greatly increasing weldering The extensibility of seam;Then, to the crystallization after diffusion and refinement using roll milling craft so as to become more Closely, thus further improve the extensibility of weld seam;Finally, fragility is adopted to welded seam area Process, eliminate the fragility of 400 series stainless steels, thus it is stainless yet further to improve 400 series The plasticity of steel and extensibility;By postwelding, welded seam area is first adopted with the heat treatment of a normalizing, can make The thick crystalline solid of weld dimensions is spread, and so that it is evenly distributed, and keeps weld seam simultaneously And heat affected area uniform temperature prepares for secondary normalizing;Secondary followed by adopting to welded seam area The heat treatment of normalizing, can make weld dimensions texture refine, simultaneously through double normalizing, Make the strip welded seam area temperature of fabric width >=1000mm than more uniform, balance, thus further reducing The degree of hardening of weld dimensions, improves metal extensibility;By being joined using annealing Close the technique rapidly cooling down, eliminate 400 series stainless steels in 475 DEG C of interval friable tissues producing, Thus further increasing plasticity and the extensibility of 400 series stainless steels;By before annealing Rapidly cool down again plus once, ensured the technique when welding 400 series stainless steel and welding quality Uniformity;By the strip steel according to concrete different model, the different interval preheating temperature of optimized choice, Normalizing temperature, secondary normalizing temperature and temperature, can further improve the extension of weld seam Property;By being the rolling wheel of circular arc using end face, force localization when rolling can be made in weld metal zone Domain, destroys the crystallization after normalizing so as to even closer so as to more preferable.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this Within bright spirit and principle, any modification, equivalent substitution and improvement made etc., should be included in Within protection scope of the present invention.

Claims (9)

1. a kind of resistance welding technology with on-line continuous weld seam heat treatment it is characterised in that include with Lower step:
1) online strip steel carries out shearing spelling by shear (2) on the shearing station of welding sequence Seam;
2), after shearing piece finishes, the welding region of described online strip steel is in the preheating of described welding sequence On station, on-line continuous intensification preheating is carried out by preheating device (5);
3) heat up after preheating, described online strip steel passes through resistance on the welding post of described welding sequence Welder (3) is welded;
After 4a) welding finishes, the welded seam area of described online strip steel is in the positive firer of described welding sequence On position, on-line continuous weld seam normalized treatment is carried out by normalizing mechanism (6a);
After 4b) normalized treatment finishes, the welded seam area of described online strip steel is in the rolling of described welding sequence On pressure station, on-line continuous weld seam spreading is carried out by Roller compaction device (4);
After 4c) spreading finishes, the welded seam area of described online strip steel is in the Temperer of described welding sequence Tempering mechanism (6b) is passed through on position and carries out on-line continuous weld seam temper or in fragility treatment process Carry out on-line continuous weld seam fragility by fragility processing meanss (7) on position to process, described fragility is processed Operation is the lower step operation of described welding sequence.
2. the resistance welding technology with on-line continuous weld seam heat treatment as claimed in claim 1, it is special Levy and be, described fragility processing meanss (7) include subsidiary engine dolly (7a) and are sequentially arranged in described Water box (7b) on subsidiary engine dolly (7a), annealing mechanism (7c) and circulation water refrigerating machine (7d), In described water box (7b) and above the upper corresponding described water box (7b) of described subsidiary engine dolly (7a) Position be respectively provided with the rapidly cooling spray of the welding region positive and negative being rapidly cooled in tape steel (7e), described rapidly cooling spray (7e) is connected with the delivery outlet of described circulation water refrigerating machine (7d), Described water box (7b) is connected with the input port of described circulation water refrigerating machine (7d).
3. the resistance welding technology with on-line continuous weld seam heat treatment as claimed in claim 2, it is special Levy and be, the heating-up temperature of described annealing mechanism (7c) is 500~650 DEG C.
4. the resistance welding technology with on-line continuous weld seam heat treatment as claimed in claim 2, it is special Levy and be, described annealing mechanism (7c) adopts high frequency induction heater.
5. the resistance welding technology with on-line continuous weld seam heat treatment as claimed in claim 1, it is special Levy and be, step 4a) particularly as follows:
After 4a1) welding finishes, the welded seam area of described online strip steel in described welding sequence once just On firer position, the normalizing of on-line continuous weld seam is carried out by a normalizing mechanism (6a1);
After 4a2) normalizing finishes, the welded seam area of described online strip steel is the two of described welding sequence On secondary normalizing station, on-line continuous weld seam secondary normalizing is carried out by secondary normalizing mechanism (6a2).
6. the resistance welding technology with on-line continuous weld seam heat treatment as claimed in claim 5, it is special Levy and be, the heating-up temperature of described preheating device (5) is 150~200 DEG C, a described normalizing mechanism (6a1) heating-up temperature is 650~800 DEG C, and the heating-up temperature of described secondary normalizing mechanism (6a2) is 500~650 DEG C, the heating-up temperature of described tempering mechanism (6b) is 300~400 DEG C.
7. the resistance welding technology with on-line continuous weld seam heat treatment as claimed in claim 5, it is special Levy and be, described preheating device (5), normalizing mechanism (6a1), a secondary normalizing mechanism (6a2) With tempering mechanism (6b) all using high frequency induction heater.
8. the resistance welding technology with on-line continuous weld seam heat treatment as claimed in claim 1, it is special Levy and be, the end face of the rolling wheel of described Roller compaction device (4) is circular arc.
9. the resistance welding technology with on-line continuous weld seam heat treatment as claimed in claim 1, it is special Levy and be, described on-line continuous weld seam fragility process particularly as follows:
The welded seam area of the described online strip steel after spreading is in the rapidly bosher of described fragility treatment process On position, room temperature is rapidly down to by described rapidly cooling spray (7e);
It is down to the lehr attendant in described fragility treatment process for the welded seam area of the described online strip steel after room temperature Made annealing treatment by described annealing mechanism (7c) on position;
The welded seam area of the described online strip steel after annealing is again in the rapidly cooling station of described fragility treatment process Above room temperature is rapidly down to by described rapidly cooling spray (7e).
CN201510413405.2A 2015-07-15 2015-07-15 Resistance welding technology with online continuous weld heat treatment Pending CN106346122A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107138837A (en) * 2017-06-29 2017-09-08 马鞍山钢铁股份有限公司 A kind of carbon equivalent is more than the overlap resistance soldering method of 0.5 high-intensity band steel
CN109712895A (en) * 2018-12-21 2019-05-03 中国电子科技集团公司第四十七研究所 A kind of ceramic shell parallel seam welding encapsulating method based on gold-tin eutectic solder ring
CN109894728A (en) * 2019-04-03 2019-06-18 李建 A kind of continuous weld heat treatment welding system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107138837A (en) * 2017-06-29 2017-09-08 马鞍山钢铁股份有限公司 A kind of carbon equivalent is more than the overlap resistance soldering method of 0.5 high-intensity band steel
CN107138837B (en) * 2017-06-29 2019-07-02 马鞍山钢铁股份有限公司 A kind of overlap resistance soldering method of high-intensity band steel of the carbon equivalent greater than 0.5
CN109712895A (en) * 2018-12-21 2019-05-03 中国电子科技集团公司第四十七研究所 A kind of ceramic shell parallel seam welding encapsulating method based on gold-tin eutectic solder ring
CN109894728A (en) * 2019-04-03 2019-06-18 李建 A kind of continuous weld heat treatment welding system

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Application publication date: 20170125