CN107138837B - A kind of overlap resistance soldering method of high-intensity band steel of the carbon equivalent greater than 0.5 - Google Patents
A kind of overlap resistance soldering method of high-intensity band steel of the carbon equivalent greater than 0.5 Download PDFInfo
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- CN107138837B CN107138837B CN201710515572.7A CN201710515572A CN107138837B CN 107138837 B CN107138837 B CN 107138837B CN 201710515572 A CN201710515572 A CN 201710515572A CN 107138837 B CN107138837 B CN 107138837B
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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
- B23K11/36—Auxiliary equipment
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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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
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- Heat Treatment Of Articles (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
A kind of overlap resistance soldering method of high-intensity band steel the invention discloses carbon equivalent greater than 0.5, the described method comprises the following steps: welding on narrow overlap resistance welding machine to high strength steel plate；After the completion of to be welded, into post weld heat treatment technique；The main chemical compositions and weight percent of the high-intensity band steel are as follows: C≤0.30%；Si≤0.80%；Mn≤1.50%；P≤0.035%；S≤0.030%, surplus are Fe and other microelements；The high-intensity band steel rolls the tensile strength R rolled up firmlym≥800MPa.It uses automatic resistance welding technique to be attached strip and cooperates with post weld heat treatment, to eliminate welding residual stress, improve seam organization, to guarantee the continuous and stable production of high strength steel plate product.
Description
Technical field
The invention belongs to Metal Material Welding fields, and in particular to a kind of high-intensity band steel of the carbon equivalent greater than 0.5 is taken
Connecting resistance soldering method.
Background technique
With the development of the automobile industry, requirement of the countries in the world to the safe, energy saving of automobile and discharge is more and more harsher, adopts
It not only can reduce vehicle weight with unimach, realized energy conservation and emission reduction, but also the safety of automobile can be improved.To take into account lightweight
With crashworthiness, high strength steel plate comes into being, and to adapt to this development needs, domestic and international steel had been completed a variety of high successively already
The exploitation of strong steel, the market demand just gradually expand.But with the growth of high-strength steel demand, because of higher carbon in its alloying component
Equivalent, brittle element accounting and rolling hard volume intensity makes the switching performance of its strip in process of production be more difficult to get guarantee, crackle
Sensibility is larger and weld metal zone fusion is insufficient, increases the risk of the disconnected band of weld seam.
For the narrow lap resistance welding of high strength band steel, due to its special design of alloy, when weld heat input is lower
When, it is easy to produce the insufficient phenomenon of fusion inside weld seam, deteriorates property of welded joint；When weld heat input is higher, can draw
It plays spatter and generates poor surface quality, directly affect the service life of welding wheel and the roller consumption of working roll.
Summary of the invention
In order to solve the above technical problems, a kind of overlap joint electricity of the high-intensity band steel the present invention provides carbon equivalent greater than 0.5
Welding resistance method uses automatic resistance welding technique to be attached strip and cooperates with post weld heat treatment, so that it is residual to eliminate welding
Residue stress improves seam organization, to guarantee the continuous and stable production of high strength steel plate product.
The technical scheme adopted by the invention is as follows:
A kind of overlap resistance soldering method of high-intensity band steel of the carbon equivalent greater than 0.5, the described method comprises the following steps:
(1) high strength steel plate is welded on narrow overlap resistance welding machine；
(2) after the completion of to be welded, into post weld heat treatment technique；
The main chemical compositions and weight percent of the high-intensity band steel are as follows: C≤0.30%；Si≤0.80%；Mn≤
1.50%；P≤0.035%；S≤0.030%, surplus are Fe and other microelements.
The high-intensity band steel rolls the tensile strength R rolled up firmlym≥800MPa。
Narrow lap resistance welding refers to that lap width is less than welding wheel width.
In the step (1), to make faying surface that there is enough current densities, it need to guarantee that welding current range is 23-25KA；
Electrode pressure control range is 15~17KN.
In the step (1), to reduce compared with think gauge high strength band steel rigidity, it is tightly combined, welds conducive to strip faying surface
Velocity interval is 8~10m/min.
In the step (1), to increase overlap joint surface current density and faying surface being made to be pressurized sufficiently, fore side amount of lap range
For 0.9~1.1mm, transmission side amount of lap is 2.0~2.3mm.
To prevent faying surface edge cracks that are excessive by rolling wheel pressure and generating, the weld seam that postwelding applies overlap
Rolling range is 17~19KN.
In the step (2), using combustion gas as fuel gas.
In the step (2), 780 DEG C are heated to reduce welding point thermal stress and brittleness, post weld heat treatment temperature, point
Fire is to 35~45S of burnout time.
Further, post weld heat treatment uses weld seam annealing device, and weld seam annealing device has infrared centralising device, can butt welding
Seam and annealing flame automatic centering.
Further, the method also includes entering width notcher, Welded Joints cupping after the completion of post weld heat treatment
It can be carried out detection.
1.8mm thickness hot forming steel plate, carbon equivalent 0.52 are connected using the method, tension test is broken in base material, cup
Prominent test is not removed in faying surface, and recurvation performance is suitable with base material, and surface quality is good.
The calculation formula of carbon equivalent in the present invention are as follows: CE=C+Mn/6+ (Cr+Mo+V)/5+ (Si+Ni+Cu)/15 (%).
A kind of narrow overlap resistance soldering method of high strength steel plate of the carbon equivalent disclosed by the invention greater than 0.5, is primarily adapted for use in
In narrow overlap resistance soldering equipment unit without online annealing function, and facility compact makes to increase induction heating etc. without reserved space
The situation for hot standby difficulty of annealing, economic and reliable is convenient for control.
Compared with prior art, the present invention has following advantages:
1. using overlap resistance Welding provided by the invention, it can be used for the overlap joint electricity of condition of equivalent thickness and intensity rank strip
Welding resistance；
2. using the welding cold-rolled high strength steel plate of the welding method, keep its band steel welded joint toughness and surface quality good,
Guarantee the normal production of strip while reducing wheel consumption；
3. ensure that the narrow lap resistance welding joint performance of high strength steel plate, reducing the disconnected method with risk；
4. solve in the case where being changed without mechanical and electrical hardware, by single increases PLC program and accordingly man-machine
The transformation at interface realizes that narrow lap welder increases post-weld annealed function；
Detailed description of the invention
Fig. 1 is the cold-bending property test result of the steel plate after the overlap joint that embodiment 1 obtains；
Fig. 2 is the cupping the performance test results of the steel plate after the overlap joint that embodiment 1 obtains；
Fig. 3 is macroscopic observation (a) and the seam organization of the welding point cross section of the steel plate after the overlap joint that embodiment 1 obtains
(b)；
Fig. 4 is process flow chart of the invention.
Specific embodiment
A kind of overlap resistance soldering method of the high-intensity band steel greater than 0.5, the described method comprises the following steps:
(1) high strength steel plate is welded on narrow overlap resistance welding machine；
Its state modulator is as follows: welding current range is 23-25KA；Electrode pressure control range is 15~17KN, welding
Velocity interval is 8~10m/min.Fore side amount of lap range is 0.9~1.1mm, and transmission side amount of lap is 2.0~2.3mm.Weldering
It is 17~19KN that the weld seam applied afterwards to overlap, which rolls range,.
(2) after the completion of to be welded, into post weld heat treatment technique；
Enter weld seam annealing device after the completion of to be welded, weld seam annealing device has infrared centralising device, can to weld seam with
Annealing flame automatic centering；Open weld seam annealing device power supply, initial igniter, using combustion gas as fuel gas, ultraviolet
The detection of line flame monitor is lower so that weld seam temperature reaches 780 DEG C；It is required simultaneously from igniting to burnout time T >=35S；
(3) enter width notcher after the completion of post weld heat treatment, Welded Joints cupping performance is detected.It is described high-strength
Spend the main chemical compositions and weight percent of strip are as follows: C≤0.30%；Si≤0.50%；Mn≤1.50%；P≤
0.030%；S≤0.010%.Surplus is Fe and other microelements.
The high-intensity band steel rolls the tensile strength R rolled up firmlym≥800MPa。
The following describes the present invention in detail with reference to the accompanying drawings and embodiments.
Embodiment 1
A kind of overlap resistance soldering method for the 1.8mm thickness hot forming steel plate that carbon equivalent is 0.52, the hot forming steel plate
Chemical component and weight percent are as follows: C≤0.30%；Si≤0.50%；Mn≤1.50%；P≤0.030%；S≤0.010%；
Cr≤0.50%；B≤0.005%；Surplus is Fe and other microelements；It rolls the tensile strength R rolled up firmlymFor 1000MPa.
It the described method comprises the following steps:
(1) high strength steel plate is welded on narrow overlap resistance welding machine；
Its state modulator is as follows: welding current 25KA；Electrode pressure is 16KN, speed of welding 10m/min.Fore side
Amount of lap is 0.9mm, and transmission side amount of lap is 2.1mm.Postwelding rolls as 19KN the weld seam that overlap applies.
(2) after the completion of to be welded, into post weld heat treatment technique；
Enter weld seam annealing device after the completion of to be welded, weld seam annealing device has infrared centralising device, can to weld seam with
Annealing flame automatic centering；Open weld seam annealing device power supply, initial igniter, using combustion gas as fuel gas, ultraviolet
The detection of line flame monitor is lower so that weld seam temperature reaches 780 DEG C；It requires to be 35S from igniting to the burnout time simultaneously；
(3) enter width notcher after the completion of post weld heat treatment, Welded Joints cupping performance is detected.
Steel plate after the present embodiment overlap joint is tested, tension test is broken in base material, and cupping test is not in faying surface
Removing, recurvation performance is suitable with base material, and surface quality is good, as shown in Figure 1 and Figure 2.
It does not find to fuse insufficient phenomenon in commissure, and weld seam interior tissue is uniform, as shown in Figure 3.
And do not occur disconnected band accident during subsequent production.
Embodiment 2
A kind of overlap resistance soldering method of 1000MPa grades of martensite dual-phase steel plates of 1.8mm thickness that carbon equivalent is 0.58, it is described
The chemical component and weight percent of hot forming steel plate are as follows: C≤0.25%；Si≤0.80%；Mn≤0.80%；P≤
0.035%；S≤0.030%；Alt >=0.020%.Surplus is Fe and other microelements；It rolls the tensile strength R rolled up firmlymFor
1400MPa。
It the described method comprises the following steps:
(1) high strength steel plate is welded on narrow overlap resistance welding machine；
Its state modulator is as follows: welding current 23KA；Electrode pressure control is 17KN, speed of welding 9m/min.Behaviour
Making side amount of lap is 1.1mm, and transmission side amount of lap is 2.2mm.Postwelding is 19KN to the weld seam grinding pressure that overlap applies.
(2) after the completion of to be welded, into post weld heat treatment technique；
Enter weld seam annealing device after the completion of to be welded, weld seam annealing device has infrared centralising device, can to weld seam with
Annealing flame automatic centering；Open weld seam annealing device power supply, initial igniter, using combustion gas as fuel gas, ultraviolet
The detection of line flame monitor is lower so that weld seam temperature reaches 780 DEG C；It requires to be 45S from igniting to the burnout time simultaneously；
(3) enter width notcher after the completion of post weld heat treatment, Welded Joints cupping performance is detected.
Steel plate after the present embodiment overlap joint is tested, tension test is broken in base material, and cupping test is not in faying surface
Removing, recurvation performance is suitable with base material, and surface quality is good.
It does not find to fuse insufficient phenomenon in commissure, and weld seam interior tissue is uniform.
And do not occur disconnected band accident during subsequent production.
Embodiment 3
A kind of overlap resistance soldering method for the 2mm thickness hot forming steel plate that carbon equivalent is 0.52, the change of the hot forming steel plate
It studies point and weight percent are as follows: C≤0.30%；Si≤0.50%；Mn≤1.50%；P≤0.030%；S≤0.010%；Cr
≤ 0.50%；B≤0.005%；Surplus is Fe and other microelements.It rolls the tensile strength R rolled up firmlymFor 1000MPa.
It the described method comprises the following steps:
(1) high strength steel plate is welded on narrow overlap resistance welding machine；
Its state modulator is as follows: welding current range is 24KA；Electrode pressure control range is 17KN, speed of welding range
For 8m/min.Fore side amount of lap range is 1.1mm, and transmission side amount of lap is 2.3mm.The weld seam that postwelding applies overlap
Rolling range is 19KN.
(2) after the completion of to be welded, into post weld heat treatment technique；
Enter weld seam annealing device after the completion of to be welded, weld seam annealing device has infrared centralising device, can to weld seam with
Annealing flame automatic centering；Open weld seam annealing device power supply, initial igniter, using combustion gas as fuel gas, ultraviolet
The detection of line flame monitor is lower so that weld seam temperature reaches 780 DEG C；It requires to be 40S from igniting to the burnout time simultaneously；
(3) enter width notcher after the completion of post weld heat treatment, Welded Joints cupping performance is detected.
Steel plate after the present embodiment overlap joint is tested, tension test is broken in base material, and cupping test is not in faying surface
Removing, recurvation performance is suitable with base material, and surface quality is good.
It does not find to fuse insufficient phenomenon in commissure, and weld seam interior tissue is uniform.
And do not occur disconnected band accident during subsequent production.
It is above-mentioned detailed greater than the overlap resistance soldering method progress of 0.5 high-intensity band steel to a kind of carbon equivalent referring to embodiment
Thin description, is illustrative without being restrictive, several embodiments can be enumerated according to limited range, therefore do not taking off
From the change and modification under present general inventive concept, should belong within protection scope of the present invention.
Claims (7)
1. a kind of carbon equivalent greater than 0.5 high-intensity band steel overlap resistance soldering method, which is characterized in that the method includes with
Lower step:
(1) high strength steel plate is welded on narrow overlap resistance welding machine；
(2) after the completion of to be welded, into post weld heat treatment technique；
The main chemical compositions and weight percent of the high-intensity band steel are as follows: C≤0.30%；Si≤0.80%；Mn≤1.50%；P
≤0.035%；S≤0.030%, surplus are Fe and other inevitable impurity；
The high-intensity band steel rolls the tensile strength R rolled up firmlym≥800MPa；
In the step (1), fore side amount of lap range is 0.9 ~ 1.1mm, and transmission side amount of lap is 2.0 ~ 2.3mm；Postwelding pair
It is 17 ~ 19KN that the weld seam that overlap applies, which rolls range,；
In the step (2), post weld heat treatment temperature is heated to 780 DEG C, igniting to 35~45s of burnout time.
2. the method according to claim 1, wherein welding current range is 23-25KA in the step (1)；
Electrode pressure control range is 15 ~ 17KN.
3. method according to claim 1 or 2, which is characterized in that in the step (1), speed of welding range be 8 ~
10m/min。
4. method according to claim 1 or 2, which is characterized in that in the step (2), using combustion gas as combustible gas
Body.
5. method according to claim 1 or 2, which is characterized in that post weld heat treatment uses weld seam annealing device, and weld seam moves back
Fiery device has infrared centralising device, can be to weld seam and annealing flame automatic centering.
6. the method according to claim 1, wherein the method also includes entering after the completion of post weld heat treatment
Width notcher, Welded Joints cupping performance are detected.
7. the method according to claim 1, wherein using the method connect 1.8 mm thickness hot forming steel plates,
Carbon equivalent is 0.52, and tension test fracture is not removed in faying surface in base material, cupping test, and recurvation performance is suitable with base material, and
Surface quality is good.
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| CN201710515572.7A CN107138837B (en) | 2017-06-29 | 2017-06-29 | A kind of overlap resistance soldering method of high-intensity band steel of the carbon equivalent greater than 0.5 |
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| CN108296638B (en) * | 2018-01-26 | 2020-05-08 | 河钢股份有限公司承德分公司 | Method for improving strip steel welding quality of continuous galvanizing production line |
| CN113166840B (en) * | 2018-11-19 | 2023-02-28 | 安赛乐米塔尔公司 | Double pass, double annealing welding method for joining high strength steels |
| CN109909595B (en) * | 2019-03-29 | 2021-04-30 | 山东钢铁集团日照有限公司 | Narrow lap welding method for 590 MPa-grade cold-rolled dual-phase steel and 270MPa plain carbon steel |
| CN112139645B (en) * | 2019-06-26 | 2022-06-24 | 宝山钢铁股份有限公司 | Narrow lap rolling seam welding method for high-silicon thin-specification oriented silicon steel |
| CN114700600B (en) * | 2022-03-31 | 2024-04-26 | 马鞍山钢铁股份有限公司 | Connection method of 1800 MPa-level hot-formed steel substrate |
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