CN113263245B - Tailor welding method for steel frame for producing titanium steel composite plate - Google Patents
Tailor welding method for steel frame for producing titanium steel composite plate Download PDFInfo
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- CN113263245B CN113263245B CN202110522646.6A CN202110522646A CN113263245B CN 113263245 B CN113263245 B CN 113263245B CN 202110522646 A CN202110522646 A CN 202110522646A CN 113263245 B CN113263245 B CN 113263245B
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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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
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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
- B23K9/00—Arc welding or cutting
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Abstract
The invention discloses a tailor-welding method for producing a steel frame of a titanium steel composite plate, which comprises the following steps: selecting four steel bars, and performing groove processing on one end of each steel bar to form a groove end, wherein the unprocessed other end is used as the tail end of the steel bar; the bevel end of each steel bar is adjacent to the tail ends of other steel bars to form a splice welding joint with a K-shaped bevel, and four steel bars are assembled into a steel frame in sequence; and welding the splice joints, and removing the surplus height of the splice joints after the welding is finished to obtain the steel frame of the titanium steel composite plate. According to the invention, by optimizing and improving the steel frame tailor-welding structure and adopting the stage welding process, the steel frames with uniformly distributed welding joints can be obtained, and the distribution state of the positions which are easy to have defects is reduced. When the subsequent titanium steel composite blank vacuum electron beam sealing welding is carried out, the stability of the sealing welding joint is improved, and the spray explosion defect of a molten pool is avoided.
Description
Technical Field
The invention belongs to the technical field of metal material processing, and particularly relates to a tailor-welding method for a steel frame for producing a titanium steel composite plate.
Background
The titanium steel composite plate has excellent corrosion resistance of the titanium composite layer, has the strength and plasticity of the base layer structural steel, and has greatly reduced economic cost compared with the titanium plate, thereby becoming an ideal material for manufacturing corrosion-resistant environmental equipment. As a basis for producing titanium steel composite boards, the preparation of composite blanks in the titanium steel composite boards is widely concerned by people. At present, the common assembly mode is to place a titanium plate in a hollow composite blank consisting of two carbon steel plates and a steel frame with a certain thickness, and then seal-weld the blank by adopting a vacuum electron beam welding technology. If the integral steel frame is adopted for assembly, the integral steel frame needs to be cut on the hot-rolled thick plate, so that the preparation cost is high, and the yield is low. If the steel bars are spliced into the frame and then the vacuum electron beams are subjected to unified sealing welding, the welding efficiency is low, and the production line occupies a long time. At present, the steel frame is generally prepared by adopting an off-line manual tailor-welding method by using steel bars. However, the traditional steel frame tailor-welding process is easy to form the problems of uneven distribution of welding joints and concentrated tailor-welding surface defects, and during the subsequent vacuum electron beam seal welding, the defects of molten pool spray explosion, serious undercut, even incapability of forming and the like are easily formed, so that the subsequent heating and rolling compounding is directly influenced.
Disclosure of Invention
The present invention is based on the discovery and recognition by the inventors of the following facts and problems: the method for manually welding the steel bar under the wire is adopted to prepare the steel frame, the problems of uneven distribution of welding joints and concentrated welding surface defects are easily formed, the defects of spray explosion of a molten pool, serious undercut, even incapability of forming and the like are easily formed during subsequent sealing welding, and the subsequent heating and rolling compounding is directly influenced.
The present invention is directed to solving, at least in part, one of the technical problems in the related art.
Therefore, the embodiment of the invention provides a tailor-welding method for a steel frame for producing a titanium steel composite plate, which can obtain the steel frame with uniformly distributed welding joints by optimizing and improving a tailor-welding structure of the steel frame and adopting a staged welding process, optimizes the surface quality of the joints and reduces the distribution state of positions with easy defects. When the subsequent titanium steel composite blank vacuum electron beam sealing welding is carried out, the stability of the sealing welding joint is improved, and the spray explosion defect of a molten pool is avoided.
The tailor welding method for the steel frame for producing the titanium steel composite plate comprises the following steps:
a. four steel bars are selected as the tailor-welded steel frame material, the widths of the four steel bars are equal to each other, the heights of the four steel bars are equal to each other, and the lengths of the four steel bars are equal to each other in pairs.
b. Performing groove machining on one end of each steel bar to obtain a bevel end of each steel bar, wherein the unprocessed other end of each steel bar is used as the tail end of each steel bar;
c. b, assembling the four steel bars in the step b into a steel frame, wherein the bevel end of each steel bar is adjacent to the tail end of the other steel bar, and the top of the bevel is parallel to the long edges of the steel bars and forms a gap; fitting four of said steel bars end to end in sequence so as to assemble said four steel bars into a steel frame, wherein a first end of one of two adjacent of said steel bars is fitted with a second end of the other of two adjacent of said steel bars,
the first end of the one of the two adjacent steel bars and the second end of the other of the two adjacent steel bars constitute a tailor welded joint with a K-groove;
d. c, welding the tailor welded joint in the step c;
e. and removing the surplus height of the tailor-welded joint, oil stains on the steel frame and an oxide layer on the steel frame after the completion to obtain the steel frame of the titanium steel composite plate.
According to the advantages and the technical effects brought by the embodiment of the invention, the groove processing is carried out on the first end part of each steel bar, the groove end of each steel bar is adjacent to the tail ends of other steel bars, and each side of the steel frame is only provided with one tailor-welded joint. The four sides of the splice welding joint are uniformly distributed, so that the probability of sealing defects on a single side of the steel frame can be reduced, the formation of serious vacuum electron beam spray explosion defects is avoided, the problems of incapability of welding, repeated repair welding and the like caused by the vacuum electron beam spray explosion defects are avoided, and the sealing quality stability of the steel frame is improved.
According to the tailor welding method for producing the steel frame of the titanium-steel composite plate, the material of the steel bar is the same as that of the base material of the titanium-steel composite plate, and optionally, the steel bar is a hot rolled steel bar or a continuous casting billet.
According to the tailor-welding method for producing the steel frame of the titanium steel composite plate, in the step b, the tailor-welding joint is a symmetrical K-shaped groove, the truncated edge is 0mm, the angle alpha of the symmetrical K-shaped groove is 45-60 degrees, and in the step c, the reserved gap a of the symmetrical K-shaped groove is 1.5-3 mm.
According to the tailor welding method for producing the titanium steel composite plate steel frame, in the step d, first welding for backing and filling one side of the groove is performed by adopting a TIG welding or gas shielded metal arc welding (GMAW) welding process, then welding for the second time is performed on one side of the groove (tailor welded joint) by adopting a SMAW or GMAW welding process, and then welding for the other side of the tailor welded joint is completed by adopting the same method.
According to the tailor-welding method for producing the titanium steel composite plate steel frame, the first welding, the priming and the filling welding are carried out to the position 5mm-10mm away from the upper plane of the groove, and the welding direction of the first welding is longitudinal.
According to the tailor-welding method for producing the steel frame of the titanium-steel composite plate, in the second welding, the arc starting position and the arc ending position are two points which are 10mm-20mm away from two ends respectively, the welding track is that the arc is started from the arc starting position, the arc is welded to the closer end, the arc is turned back to the farther end, and finally the arc is turned back to the arc ending position for arc ending, the arc starting center is the edge of the last welding seam during each welding, after the second welding is finished, the cover surface of the tailor-welded joint is 3mm-5mm higher than the upper surface of the steel frame, and the welding direction of the second welding is transverse.
According to the tailor-welding method for producing the titanium-steel composite plate steel frame, after welding of one side of the tailor-welded joint is completed, the steel frame is turned over, the bottom of the other side of the tailor-welded joint is back-gouged, and then welding is carried out.
According to the tailor-welding method for producing the titanium-steel composite plate steel frame, after the complete welding of the tailor-welding joint on one side of the steel frame is completed, the tailor-welding joints on the opposite sides of the welded side of the steel frame are welded, and then the tailor-welding joints on the adjacent sides are welded.
According to the tailor welding method for producing the titanium steel composite plate steel frame, in the step d, the surplus height of the tailor welding joints is removed, and in order to remove the surplus height of the surfaces of all the tailor welding joints, the heights of the tailor welding joints and the surfaces of the steel frame are consistent.
Drawings
FIG. 1 is a schematic structural diagram of a steel frame of a tailor welding method for producing a steel frame of a titanium-steel composite plate according to an embodiment of the present invention;
FIG. 2 is a schematic view of a tailor-welded groove of a tailor-welding method for producing a steel frame of a titanium-steel composite plate according to an embodiment of the present invention;
FIG. 3 is a schematic view of the welding direction of the tailor-welding method for producing the steel frame of the titanium steel composite plate according to the embodiment of the invention.
Reference numerals are as follows:
left billet 1, preceding billet 2, right billet 3, back billet 4.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The tailor-welding method for producing the steel frame of the titanium steel composite plate comprises the following steps:
a. four steel bars are selected as the material of the tailor-welded steel frame, the widths of the four steel bars are equal to each other, the heights of the four steel bars are equal to each other, and the lengths of the four steel bars are equal to each other two by two. That is, the lengths of two of the four steel bars are equal to each other, and the lengths of the other two of the four steel bars are equal to each other.
b. Each of the steel bars has a first end and a second end opposite to each other in a longitudinal direction thereof, the first end of each of the steel bars is subjected to groove processing to obtain a beveled end of the steel bar, and the unprocessed second end of each of the steel bars serves as a tail end of the steel bar;
c. sequentially fitting four steel bars end to end so as to assemble the four steel bars into a steel frame, wherein the first end portion of one of the adjacent two steel bars is fitted with the second end portion of the other of the adjacent two steel bars, and the first end portion of one of the adjacent two steel bars and the second end portion of the other of the adjacent two steel bars constitute a tailor welded joint with a K-shaped groove;
d. c, welding the splice joints in the step c;
e. and removing the surplus height of the tailor-welded joint, oil stains on the steel frame and an oxide layer of the steel frame after the tailor-welded joint is finished, thereby obtaining the steel frame of the titanium steel composite plate.
According to the advantages and the technical effects brought by the embodiment of the invention, the groove processing is carried out on the first end part of each steel bar, the groove end of each steel bar is adjacent to the tail ends of other steel bars, and each side of the steel frame is only provided with one tailor-welded joint. The four sides of the splice welding joint are uniformly distributed, so that the probability of sealing defects on a single side of the steel frame can be reduced, the formation of serious vacuum electron beam spray explosion defects is avoided, the problems of incapability of welding, repeated repair welding and the like caused by the vacuum electron beam spray explosion defects are avoided, and the sealing quality stability of the steel frame is improved.
According to the tailor-welding method for producing the steel frame of the titanium-steel composite plate, the material of the steel bar is the same as that of the base material of the titanium-steel composite plate. Optionally, the steel strip is a hot rolled steel strip or a continuous cast billet.
According to the tailor-welding method for producing the steel frame of the titanium steel composite plate, in the step c, the tailor-welded joint is a symmetrical K-shaped groove. Specifically, the angle alpha of the symmetrical K-shaped groove is set to be 45-60 degrees, and the truncated edge of the symmetrical K-shaped groove is set to be 0mm. The purpose is to control the metal filling amount of the tailor-welded joint, reduce the workload, ensure the welding quality and avoid the defects of incomplete penetration, undercut and inclusion. If the angle is set to be too large, the metal filling amount of the tailor-welded joint is large, the welding efficiency is low, and the production cost is high. If the angle is set to be too small, the welding arc is not easy to reach the root of the tailor-welded joint, and incomplete penetration, undercut and inclusion defects are easy to form.
In the embodiment of the invention, in the step c, the reserved gap a of the symmetrical K-shaped groove is 1.5mm-3mm. The reserved gap a of the symmetrical K-shaped groove is 1.5mm-3mm, and the purpose is to facilitate welding forming of the bottom of the groove and reduce the conditions of incomplete penetration, undercut and inclusion defects. If the reserved gap is too small, the welding arc is not easy to reach the bottom of the groove, and the defects of incomplete penetration, undercut and inclusion are formed. If the reserved gap is too large, good welding forming is not easy to form, and even a joint cannot be formed.
According to the tailor-welding method for producing the titanium-steel composite plate steel frame, in the step d, TIG welding or gas shielded metal arc welding (GMAW) is adopted to carry out primary welding of backing and filling on one side of the groove, manual arc welding (SMAW) or GMAW is adopted to carry out secondary welding on one side of the groove, and then the welding on the other side of the tailor-welded joint is completed by the same method.
Wherein, the first welding adopts TIG or GMAW to carry out priming and filling welding to carry out b-section welding, and the purpose is to control welding heat input and reduce welding heat influence and deformation. TIG or GMAW welding heat input is little, and the influence to the joint is less and the deformation degree is low, can guarantee welding efficiency and quality. The second welding adopts manual arc welding (SMAW) or GMAW to perform backing and filling welding to perform c-section welding, and the aim is to further improve welding heat input and reduce the defects of air holes, slag inclusion and the like easily occurring when the groove is filled by multilayer welding; on the other hand, the upper limit of welding heat input is controlled, so that the welding efficiency is improved, and the mechanical property of a welding joint is ensured.
According to the tailor-welding method for producing the titanium steel composite plate steel frame, in the first welding, priming and filling welding are carried out to the position 5mm-10mm away from the upper plane of the groove, and the welding direction of the first welding is longitudinal. The longitudinal direction refers to two opposite ends of the processed groove in the width direction of two adjacent steel bars forming the tailor welded joint, when the longitudinal direction is the up-down direction, the width direction is consistent with the up-down direction, and the longitudinal direction is shown by an arrow a in fig. 3.
The welding direction of the first welding is longitudinal, and the arcing and arc-stopping positions are regulated and controlled on one hand to be distributed at the longitudinal front and rear surface positions, so that high-incidence areas with defects such as arcing and arc-stopping craters are prevented from being positioned in the welding joint of the two steel bars, and the welding connection quality and stability of the two steel bars are improved; on the other hand, the welding frequency is reduced, two adjacent metal strips can be quickly welded and connected, and the welding efficiency is improved.
According to the tailor-welding method for producing the steel frame of the titanium-steel composite plate, in the second welding, the arc starting position and the arc ending position are two points which are 10mm-20mm away from two ends respectively, wherein the two ends refer to two opposite ends of the machined groove in the length direction of the adjacent two steel bars which form the tailor-welded joint, and when the transverse direction is the left-right direction, the width direction is consistent with the left-right direction.
The transverse direction refers to a length direction of the steel bar to which the groove is processed in two adjacent steel bars forming the tailor welded joint, and the transverse direction is shown by an arrow B in fig. 3.
The second welding is c-section welding which is 5-10 mm away from the upper surface of the groove and has a transverse welding direction as shown in fig. 2, and the purpose of the second welding is to change the structural state of the tailor-welded joint close to the upper surface and the lower surface and optimize the structure of the same position during the subsequent vacuum electron beam seal welding. When the subsequent vacuum electron beam sealing welding is carried out, the welding position is the upper surface and the lower surface of the steel frame, and the welding direction is vertical to the outer side surface of the steel frame. If the section c still adopts the longitudinal welding direction of the section b, the direction of the electron beam is parallel to the tailor-welded direction when the vacuum electron beam is sealed, the same position of the electron beam passing through the tailor-welded joint of the steel frame is a tailor-welded welding seam or the edge of the tailor-welded welding seam is a multi-generation area with defects of undercut, inclusion, air holes and the like, the spray explosion defect is easy to occur when the vacuum electron beam is welded, the sealed joint is poor in forming and needs subsequent repair welding, and even the sealed joint cannot be formed. The welding direction of the section c is set to be transverse, the molten pool structure of electron beam sealing welding is optimized, the proportion of the welding edges is reduced, and the defect of serious molten pool spray explosion during electron beam sealing welding is avoided.
Wherein, the arc starting position and the arc closing position are two points which are 10mm-20mm away from the two ends respectively, and the welding track is as follows: starting welding from the arc starting position, welding to a nearer end (such as the front end), then turning back to the other end (such as the back end), and then turning back to the arc stopping position. The purpose is to avoid the formation of edge defects by arcing and arcing at the two ends. If the arc striking and arc closing are performed at the two end parts, defects such as undercut, air holes, inclusions and the like are easily formed, and further, defect accumulation is formed at the edge part, so that a molten pool spray explosion defect is formed in the electron beam seal welding. The arc striking and collecting positions are set to be 10mm-20mm away from the two ends, so that the defects of undercut, air holes, inclusion and the like formed at the two ends can be prevented, and the stability of electron beam sealing welding is improved.
Wherein, when each welding is carried out, the arcing center is set as the edge part of the previous welding line, the purpose is to further reduce the defect amount of the edge part of each welding line in the tailor welding and improve the vacuum seal welding quality. When gas shield welding or manual arc welding is carried out, undercut, air holes and inclusion defects are easy to occur at the edge of a welding seam. Therefore, the invention sets that the re-fusion welding is carried out on the edge part of the welding line of the last tailor-welded blank, and further optimizes the quality of the welding line.
According to the tailor-welding method for producing the titanium-steel composite plate steel frame, after welding of one side of a tailor-welded joint is completed, the steel frame is turned over, the bottom of the other side of the tailor-welded joint is gouged, and then welding is carried out.
According to the tailor-welding method for producing the titanium-steel composite plate steel frame, after the complete welding of the tailor-welding joint on one side of the steel frame is completed, the tailor-welding joints on the opposite sides of the welded side of the steel frame are welded, and then the tailor-welding joints on the adjacent sides are welded. For example, the steel frame comprises a left steel bar 1, a front steel bar 2, a right steel bar 3 and a rear steel bar 4 which are connected in sequence. Welding of the tailor welded joint between the front steel bar 2 and the right steel bar 3 is firstly carried out, welding of the tailor welded joint between the rear steel bar 4 and the left steel bar 1 is then carried out, welding of the tailor welded joint between the right steel bar 3 and the rear steel bar 4 is subsequently carried out, and welding of the tailor welded joint between the left steel bar 1 and the front steel bar 2 is finally carried out.
According to the tailor-welding method for producing the titanium steel composite plate steel frame, the height of the tailor-welded joints is consistent with that of the steel frame surface in order to remove the surface height of all the tailor-welded joints in the step d. And D/2= b + c if the height of the steel frame is D, wherein b is the height filled by the first welding, and c is the height filled by the second welding.
After the cover surface of the tailor-welded joint is welded, the residual height of the tailor-welded joint is 3-5 mm higher than the upper surface of the steel frame, so that the influence of the surface quality defect of the tailor-welded joint on the subsequent electron beam sealing is further removed. During traditional welding, pores, undercut and inclusions are easily formed on the surface and two sides of a welding seam, and if the pores, the undercut and the inclusions are not removed, the spray explosion defect is easily formed during electron beam welding. Therefore, the setting of the welding margin is 3-5 mm higher than the upper surface of the steel frame, so that the defects can be positioned outside the steel frame and removed after welding, and the stability of subsequent sealing and welding is further improved.
The present invention will be described in detail with reference to examples.
The basic information and the results of the tailor welding of the steel frame for the titanium steel composite plate are shown in table 1.
TABLE 1
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples" and the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (5)
1. A tailor welding method for producing a steel frame of a titanium steel composite plate is characterized by comprising the following steps:
a. selecting four steel bars as a tailor-welded steel frame material, wherein the widths of the four steel bars are equal to each other, the heights of the four steel bars are equal to each other, and the lengths of the four steel bars are equal to each other in pairs;
b. performing groove machining on one end of each steel bar to obtain a bevel end of the steel bar, wherein the unprocessed other end of each steel bar is used as the tail end of the steel bar;
c. b, assembling the four steel bars in the step b into a steel frame, wherein the bevel end of each steel bar is adjacent to the tail end of the other steel bar, and the top of the bevel is parallel to the long edges of the steel bars and forms a gap; sequentially fitting four of the steel bars end to end so as to assemble the four steel bars into a steel frame, wherein a first end of one of adjacent two of the steel bars is fitted with a second end of the other of adjacent two of the steel bars, the first end of the one of adjacent two of the steel bars and the second end of the other of adjacent two of the steel bars constituting a tailor welded joint with a K-shaped groove;
d. c, welding the tailor-welded joint in the step c, firstly performing primary welding of backing and filling on one side of the K-shaped groove by adopting a TIG (tungsten inert gas) welding or GMAW (gas metal arc welding) welding process, then performing secondary welding on the one side of the K-shaped groove by adopting SMAW (small surface acoustic wave) or GMAW (gas metal arc welding), and finishing the welding of the other side of the tailor-welded joint by using the same method;
in the first welding, bottoming and filling welding are carried out to a position 5mm-10mm away from the upper plane of the groove, and the welding direction of the first welding is longitudinal;
in the second welding, the arc starting position and the arc closing position are two points which are 10-20 mm away from the two ends respectively, the welding track is that the arc is started from the arc starting position, the arc is welded to the closer end, then the arc is turned back to the farther end, and finally the arc is turned back to the arc closing position for arc closing, the arc starting center is the edge of the previous welding seam during each welding, after the second welding is finished, the cover surface of the splice welding joint is 3-5 mm higher than the upper surface of the steel frame, and the welding direction of the second welding is transverse;
e. removing the surplus height of the tailor-welded joint, oil stains on the steel frame and an oxide layer on the steel frame to obtain the steel frame of the titanium steel composite plate;
in the step e, removing the residual heights of the tailor-welded joints, namely removing the residual heights of the surfaces of all the tailor-welded joints to ensure that the heights of the tailor-welded joints are consistent with the height of the surface of the steel frame; after the cover surface is spliced and welded, the residual height of the splicing joint is 3-5 mm higher than the upper surface of the steel frame.
2. The tailor welding method for manufacturing a steel frame of a titanium steel composite panel according to claim 1, wherein said steel bar is a hot rolled steel bar or a continuous cast slab.
3. The tailor welding method for producing a titanium steel composite plate steel frame according to claim 1, wherein in the step b, the tailor welded joint is a symmetrical K-groove with a truncated edge of 0mm, an angle α of the symmetrical K-groove is 45 ° -60 °, and in the step c, a reserved gap a of the symmetrical K-groove is 1.5mm-3mm.
4. The tailor welding method for producing a titanium-steel composite panel steel frame according to claim 1, wherein after completing the welding of said one side of said tailor welded joint, the steel frame is turned over, and the bottom of said other side of said tailor welded joint is back-gouged, followed by welding.
5. The tailor welding method for producing a titanium steel composite plate steel frame according to any one of claims 1-4, wherein after completing the complete welding of the tailor welded joint of one side of the steel frame, the weld of the tailor welded joint of the opposite side of the welded side of the steel frame is performed, and then the weld of the tailor welded joint of the adjacent side is performed.
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| CN105127558B (en) * | 2015-09-22 | 2017-11-07 | 武汉钢铁(集团)公司 | A kind of high-strength bridge steel K-type joint complex welding method |
| JP6699303B2 (en) * | 2016-04-05 | 2020-05-27 | 日本製鉄株式会社 | Manufacturing method of multi-layer butt welded joint, multi-layer butt welded joint |
| CN106493459B (en) * | 2016-12-27 | 2018-08-31 | 湖北鑫索建设有限公司 | A kind of semi-automatic linerless penetration welding procedure of steel box column |
| CN109986230B (en) * | 2019-02-19 | 2021-03-16 | 江阴兴澄特种钢铁有限公司 | Welding process of high-Ti wear-resistant steel plate with thickness larger than 25mm |
| CN110026645A (en) * | 2019-04-10 | 2019-07-19 | 中广核研究院有限公司 | The T-type welding method and T connector of composite plate |
| CN110539064A (en) * | 2019-09-06 | 2019-12-06 | 鞍钢股份有限公司 | vacuum electron beam welding method for titanium steel composite blank by adopting edge strip assembly |
| CN111014899B (en) * | 2019-12-20 | 2021-10-22 | 中国人民解放军63926部队 | High-temperature-resistant steel butt welding method |
| CN112605517B (en) * | 2020-12-14 | 2022-06-21 | 西安航天动力机械有限公司 | Method for avoiding arc starting and closing defects of longitudinal seam electron beam welding |
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