CN111774748A - High-quality assembly and welding method of heterogeneous composite blank - Google Patents
High-quality assembly and welding method of heterogeneous composite blank Download PDFInfo
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- CN111774748A CN111774748A CN202010649515.XA CN202010649515A CN111774748A CN 111774748 A CN111774748 A CN 111774748A CN 202010649515 A CN202010649515 A CN 202010649515A CN 111774748 A CN111774748 A CN 111774748A
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- 238000003466 welding Methods 0.000 title claims abstract description 129
- 239000002131 composite material Substances 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 title claims abstract description 20
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 21
- 239000000758 substrate Substances 0.000 claims abstract description 21
- 230000007704 transition Effects 0.000 claims abstract description 19
- 229910052786 argon Inorganic materials 0.000 claims abstract description 13
- 238000010894 electron beam technology Methods 0.000 claims abstract description 11
- 238000002955 isolation Methods 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 17
- 239000010959 steel Substances 0.000 claims description 17
- 239000011248 coating agent Substances 0.000 claims description 12
- 238000000576 coating method Methods 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 239000004744 fabric Substances 0.000 claims description 6
- 238000005554 pickling Methods 0.000 claims description 4
- 238000005498 polishing Methods 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 230000004927 fusion Effects 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000005096 rolling process Methods 0.000 abstract description 3
- 150000001875 compounds Chemical class 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 abstract description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 13
- 229910052719 titanium Inorganic materials 0.000 description 13
- 239000010936 titanium Substances 0.000 description 13
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 229910001200 Ferrotitanium Inorganic materials 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Classifications
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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
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- 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
- B23K15/00—Electron-beam welding or cutting
- B23K15/06—Electron-beam welding or cutting within a vacuum chamber
-
- 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
- B23K9/007—Spot arc welding
-
- 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
- B23K9/02—Seam welding; Backing means; Inserts
-
- 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
- B23K9/235—Preliminary treatment
-
- 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
- B23K9/32—Accessories
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Arc Welding In General (AREA)
- Welding Or Cutting Using Electron Beams (AREA)
Abstract
The invention relates to a high-quality assembly and welding method of a heterogeneous composite blank, wherein the heterogeneous composite blank comprises an upper substrate A, an upper transition plate E, an upper composite plate C, a middle isolation plate G, a lower composite plate D, a lower transition plate F and a lower substrate B from top to bottom in sequence, and the assembly and welding are carried out after the plates are processed. Firstly welding the composite material, then assembling the composite material and the substrate, and sending the assembled blank to a vacuum electron beam system for vacuum welding, wherein the vacuum degree is less than 10‑2Pa, the sequence of spot welding is to weld the two ends firstWelding a long side after a narrow side, wherein a lower welding seam is required to be welded firstly when each side is welded, the welding principle is symmetrical, and the narrow side is welded firstly; the method adds the simple limiting and centering device, accelerates the centering speed and the centering quality of the compound plate, prevents the isolating agent from being scraped and touched to influence the isolating effect, has better aligning effect on the edge part and improves the argon arc welding quality. The heterogeneous composite blank produced by the technology has a stable rolling process, the flaw detection results of the rolled plate blank are all qualified, and all performances are far higher than the requirements of users.
Description
Technical Field
The invention relates to the technical field of composite blank production in the metallurgical industry, in particular to a high-quality assembly and welding method of heterogeneous composite blanks.
Background
By adopting a vacuum blank-making hot rolling composite technology, metals with large differences in strength, melting point and thermal expansion coefficient can be metallurgically combined to form a metal layered composite plate, so that the metal layered composite plate has excellent performances of different metals and meets the requirements of different environments. The prior heterogeneous composite blank mainly comprises a titanium steel composite blank and a stainless steel-carbon steel composite blank, and the titanium steel composite blank is a titanium/steel composite plate which takes titanium or titanium alloy as a coating material and ordinary carbon steel as a base material. In ocean engineering, the titanium/steel composite plate can well meet the corrosion resistance requirement under the ocean environment, and the titanium/steel composite plate is applied to a bridge column splashing area of a Japan sea-crossing bridge. The titanium/steel composite plate is adopted in the fields of chimneys of thermal power stations, satellite fuel injectors, petrochemical engineering electrolysis baths, seawater desalination heat exchangers and the like. With the continuous improvement of the demand of various fields on the titanium/steel composite board, the titanium/steel composite board with high bonding strength and good deep processing performance is prepared, and the titanium/steel composite board has a great application value.
However, the heterogeneous composite blanks are basically prepared by an explosion cladding method at present, the method has great limitation, thin specifications and specifications with large width cannot be produced, and the performance is unstable. The vacuum electron beam welding can well overcome the defects, but the vacuum electron beam welding requires high cleanliness of each joint surface and good sealing, and irreparable results are caused if air is leaked. Therefore, assembly and welding processes are the key for success of heterogeneous composite blanks, and the introduction of assembly methods and welding methods for heterogeneous composite blanks is vague at home and abroad at present.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a high-quality assembly and welding method of heterogeneous composite blanks, and the requirement of batch production of heterogeneous composite steel plates is met.
In order to achieve the purpose, the invention adopts the following technical scheme:
a high-quality assembly and welding method of heterogeneous composite blanks comprises an upper substrate A, an upper transition plate E, an upper composite plate C, a middle isolation plate G, a lower composite plate D, a lower transition plate F and a lower substrate B from top to bottom in sequence, wherein the assembly and welding are carried out after plates are processed, and the method comprises the following specific steps:
1) coating a release agent on one surface of the processed upper composite board C and the processed lower composite board D, firstly sticking the release agent by using an adhesive cloth tape within 5mm of the edge part of the surface coated with the release agent and before coating the release agent on the side surface, wherein the thickness of the release agent is 0.4-0.6mm, placing the release agent after coating in dry air, drying for more than or equal to 10 hours, and then tearing off the cloth tape;
2) firstly, placing the surface of a lower clad plate D coated with a separant upwards on an iron base plate, welding a cuboid steel block on the base plate by a spot welding mode close to an adjacent narrow edge and a wide edge to form a limiting and centering device, then placing a middle separator G on the surface of the separant, finally, placing the separant surface of an upper clad plate C downwards and dropping close to the limiting and centering device to finish the assembly of the clad plates; clamping the edges of the composite materials by using a plurality of groups of clamps to ensure that the gap between the two composite materials is not more than 1mm, performing spot welding on four edges by using an argon arc welding machine of high-purity argon, wherein symmetrical spot welding is required, the width of a welding spot is required to be 20-30mm, one welding spot is arranged at intervals of 50-60mm, performing full welding on three edges by using the argon arc welding machine after spot welding, the depth of fusion is required to be 2-3mm, continuously welding two ends of the last edge, leaving 50-100mm in the middle for no welding, and allowing the gap left in the middle to enter a vacuum chamber for vacuum electron beam sealing welding at a sealing current of 50-80mA at a speed of 10 mm/s;
3) polishing the upper part and the lower part of the formed integral composite material until no pickling solution or visible oxide exists, and wiping the integral composite material;
4) wiping the transition plate clean;
5) placing a lower substrate B with a bonding surface facing upwards on a centering machine, placing a frame spliced and welded by edge strips on the lower substrate B, sequentially placing a lower transition plate F, a welded integral composite material and an upper transition plate E in the frame, turning the upper substrate A to the bonding surface facing downwards by using a plate turning machine until the centering machine is placed on the uppermost assembly for centering, and pressing a steel blank with the thickness not less than 250mm and the length and width equivalent to those of the composite blank on the assembled composite blank to ensure that the gap of the bonding surface after assembly is not more than 0.5 mm;
6) the combined blank is sent to a vacuum electron beam system for vacuum pumping welding, wherein the vacuum degree is less than 10-2And Pa, the spot welding sequence is to weld two narrow sides firstly and then weld a long side, the welding seam at the lower part is required to be welded firstly when each side is welded, all the welding seams are required to be spot-welded, the spot welding current is 100-150mA, the welding speed is 8-10mm/s, the length of each spot welding point is 50mm, and the distance between the spot welding points is not more than 100 mm. Then continuously welding, wherein the continuous welding current is 350-;
7) and inspecting the quality of the welding seam after welding.
The thickness of the middle isolation plate G is not more than 0.5 mm.
Compared with the prior art, the invention has the beneficial effects that:
1) the technical problem that the shearing strength of the heterogeneous composite blank is low due to the scattering of the isolating agent is solved, 2) the problem that the isolating layers are adhered due to the poor isolating effect is solved, and the yield of the heterogeneous composite blank is improved; 3) the problem of welding process, because the compound base is heated unevenly, the welding seam warp seriously unable welding is solved. 4) Increase simple and easy spacing centering device for double plate centering speed and centering quality have prevented that the separant from scraping and touching the influence isolation effect, and limit portion aligns the effect better, has improved argon arc and has welded the quality. The heterogeneous composite blank produced by the technology has a stable rolling process, the flaw detection results of the rolled plate blank are all qualified, and all performances are far higher than the requirements of users.
Detailed Description
The invention is further illustrated by the following examples:
the following examples describe the invention in detail. These examples are merely illustrative of the best embodiments of the present invention and do not limit the scope of the invention.
A high-quality assembly and welding method of heterogeneous composite blanks comprises an upper substrate A, an upper transition plate E, an upper composite plate C, a middle isolation plate G, a lower composite plate D, a lower transition plate F and a lower substrate B from top to bottom in sequence, wherein the assembly and welding are carried out after plates are processed, and the method comprises the following specific steps:
1) coating a release agent on one surface of the processed upper composite board C and the processed lower composite board D, firstly sticking the release agent by using an adhesive cloth tape within 5mm of the edge part of the surface coated with the release agent and before coating the release agent on the side surface, wherein the thickness of the release agent is 0.4-0.6mm, placing the release agent after coating in dry air, drying for more than or equal to 10 hours, and then tearing off the cloth tape;
2) firstly, placing the surface of a lower clad plate D coated with a separant upwards on an iron base plate, welding a cuboid steel block on the base plate by a spot welding mode close to an adjacent narrow edge and a wide edge to form a simple centering device, then placing a middle clad plate G (the thickness is not more than 0.5mm, and the area is equivalent to or slightly smaller than the area coated with the separant) on the surface of the separant, and finally, dropping an upper clad plate C (the face of the separant is downward) close to the centering device to finish the assembly of the clad plates; clamping the edges of the composite materials by using a plurality of groups of clamps (every 300mm) to ensure that a gap between the two composite materials is not more than 1mm, performing spot welding on four edges by using an argon arc welding machine of high-purity argon firstly, requiring symmetrical spot welding, requiring that the welding points are 20-30mm wide and one welding point every 50-60mm, performing full three-edge welding by using the argon arc welding machine after spot welding, requiring that the weld depth is 2-3mm, continuously welding two ends of the last edge, leaving 50-100mm in the middle for not welding, and allowing the gap left in the middle to enter a vacuum chamber for vacuum electron beam sealing welding, wherein the sealing welding current is 50-80mA and the speed is 10mm/s, so that the composite materials form a;
3) polishing the upper and lower surfaces of the formed integral composite material by using an abrasive belt machine until no pickling solution or visible oxide exists, and wiping the whole composite material;
4) completely wiping off oil stains of the transition plate by using a steel wire ball and five cleaning powders, and then scratching and cleaning the stains by using high-purity alcohol;
5) placing a lower substrate B with a bonding surface facing upwards on a centering machine, placing a frame spliced and welded by edge strips on the lower substrate B, sequentially placing a lower transition plate F, a welded integral composite material and an upper transition plate E in the frame, turning the upper substrate A to the bonding surface facing downwards by using a plate turning machine until the centering machine is placed on the uppermost assembly for centering, and pressing a steel blank with the thickness not less than 250mm and the length and width equivalent to those of the composite blank on the assembled composite blank to ensure that the gap of the bonding surface after assembly is not more than 0.5 mm;
6) the combined blank is sent to a vacuum electron beam system for vacuum pumping welding, wherein the vacuum degree is less than 10-2And Pa, the spot welding sequence is to weld two narrow sides firstly and then weld a long side, the welding seam at the lower part is required to be welded firstly when each side is welded, all the welding seams are required to be spot-welded, the spot welding current is 100-150mA, the welding speed is 8-10mm/s, the length of each spot welding point is 50mm, and the distance between the spot welding points is not more than 100 mm. Then continuously welding, wherein the continuous welding current is 350-;
7) and inspecting the quality of the welding seam after welding.
Examples
TA2And Q345B titanium steel composite plate: the thickness of the finished product is 1.5+6mm, the width is 4500mm, the length is 10000mm, the upper substrate A and the lower substrate B are Q345B, and the upper composite board C and the lower composite board D are titanium plates TA2The upper transition plate E, the lower transition plate F and the middle isolation plate G are IF steel, and the specific embodiment is as follows:
1. preparing a blank: titanium plate TA2Two pieces, each measuring 10 × 2000, 2000 × 3500mm, two pieces of substrate Q345, 345B, base plate measuring 90 × 2100, 2100 × 3600, 3600mm, three pieces of IF steel, two pieces measuring 1.0, 2000, 3500mm, one piece measuring 0.5, 1950, 3450mm (middle spacer G), and two edge strips measuring 25, 50, 3500, 25, 3400.
2. Processing a base material: the surface roughness Ra is less than 5.5 μm, and the bonding layer is completely metal.
3. Edge strip processing: the processed edge strips are spliced and welded into a frame, the joint parts of the edge strips are subjected to groove welding, the welding seam is required to be formed to be evenly, compactly and smoothly transited to a base material, and the defects of cracks, incomplete fusion, undercut, air holes, slag inclusion, arc pits and the like exceeding the specification are avoided.
4. Composite material processing: the composite material is subjected to square returning processing and surface cleaning before assembly, the processed composite material cannot be subjected to square falling, the surface is flat and free of defects, wedges and camber are not allowed to appear, the unevenness is less than or equal to 3mm/m, and the roughness Ra is less than 5.5 mu m;
5. and (4) coating a release agent. The processed composite material is characterized in that greasy dirt, dust and the like on one surface are wiped clean, then a separant is coated on the surface, the thickness of the separant is 0.5mm, and the separant is placed in dry air to be dried for 10 hours after being coated.
6. The method comprises the steps of coating one surface of a composite material with a separant, combining the surface of the composite material with the surface facing inwards, inserting a cold-rolled plate in the middle, polishing the edge part without any oil stain or oxide, completely seeing the metal of the composite material, clamping the edge part of the composite material by using a clamp holder, ensuring that the direct gap of the composite material is not more than 1mm, performing spot welding on four sides by using an argon arc welding machine with high-purity argon gas, and requiring symmetrical spot welding, wherein the width of a welding spot is required to be about 20mm, the welding spot is required to be one welding spot at intervals of 50mm, ensuring that the composite material can be uniformly fixed after spot welding, performing full welding on three sides by. The gap left in the middle enters a vacuum chamber for vacuum electron beam sealing welding, the sealing welding current is 50mA, and the speed is 10 mm/s.
7. After sealing and welding, the other side (joint surface) of the titanium plate is lightly polished by using an abrasive belt machine until the surface has no pickling solution, and then the titanium plate is wiped clean by dipping non-woven fabric into alcohol.
8. And sequentially assembling the base blank, the cold-rolled sheet, the composite titanium sheet, the cold-rolled sheet and the base blank, wherein the gap of the joint surface after assembling is not more than 0.5 mm.
9. The combined blank is sent to a vacuum electron beam system for vacuum pumping welding, wherein the vacuum degree is less than 10-2Pa, four-side spot welding, symmetrical spot welding, 100mA of spot welding current, 8mm/s of welding speed, 400mA of continuous welding current and 6mm/s of welding speed, and welding narrow sides firstly in a symmetrical welding mode according to a welding principle.
10. And after welding, checking the quality of the welding seam by using secondary imaging of a vacuum welding system, and then putting the welding seam into a furnace for heating and rolling.
Claims (2)
1. A high-quality assembly and welding method of heterogeneous composite blanks is characterized in that the heterogeneous composite blanks sequentially comprise an upper substrate A, an upper transition plate E, an upper composite plate C, a middle isolation plate G, a lower composite plate D, a lower transition plate F and a lower substrate B from top to bottom, and the assembly and welding are carried out after plates are processed, and the method comprises the following specific steps:
1) coating a release agent on one surface of the processed upper composite board C and the processed lower composite board D, firstly sticking the release agent by using an adhesive cloth tape within 5mm of the edge part of the surface coated with the release agent and before coating the release agent on the side surface, wherein the thickness of the release agent is 0.4-0.6mm, placing the release agent after coating in dry air, drying for more than or equal to 10 hours, and then tearing off the cloth tape;
2) firstly, placing the surface of a lower clad plate D coated with a separant upwards on an iron base plate, welding a cuboid steel block on the base plate by a spot welding mode close to an adjacent narrow edge and a wide edge to form a limiting and centering device, then placing a middle separator G on the surface of the separant, finally, placing the separant surface of an upper clad plate C downwards and dropping close to the limiting and centering device to finish the assembly of the clad plates; clamping the edges of the composite materials by using a plurality of groups of clamps to ensure that the gap between the two composite materials is not more than 1mm, performing spot welding on four edges by using an argon arc welding machine of high-purity argon, wherein symmetrical spot welding is required, the width of a welding spot is required to be 20-30mm, one welding spot is arranged at intervals of 50-60mm, performing full welding on three edges by using the argon arc welding machine after spot welding, the depth of fusion is required to be 2-3mm, continuously welding two ends of the last edge, leaving 50-100mm in the middle for no welding, and allowing the gap left in the middle to enter a vacuum chamber for vacuum electron beam sealing welding at a sealing current of 50-80mA at a speed of 10 mm/s;
3) polishing the upper part and the lower part of the formed integral composite material until no pickling solution or visible oxide exists, and wiping the integral composite material;
4) wiping the transition plate clean;
5) placing a lower substrate B with a bonding surface facing upwards on a centering machine, placing a frame spliced and welded by edge strips on the lower substrate B, sequentially placing a lower transition plate F, a welded integral composite material and an upper transition plate E in the frame, turning the upper substrate A to the bonding surface facing downwards by using a plate turning machine until the centering machine is placed on the uppermost assembly for centering, and pressing a steel blank with the thickness not less than 250mm and the length and width equivalent to those of the composite blank on the assembled composite blank to ensure that the gap of the bonding surface after assembly is not more than 0.5 mm;
6) the combined blank is sent to a vacuum electron beam system for vacuum pumping welding, wherein the vacuum degree is less than 10-2Pa, the sequence of spot welding is that the narrow sides at the two ends are welded firstly, then the long sides are welded, and every two sides are weldedWhen in edge welding, the lower welding seam is required to be welded firstly, all the welding seams need spot welding, the spot welding current is 100-150mA, the welding speed is 8-10mm/s, the length of each spot welding point is 50mm, and the distance between the spot welding points is not more than 100 mm. Then continuously welding, wherein the continuous welding current is 350-.
2. The high-quality assembly and welding method for heterogeneous composite blanks according to claim 1, wherein the thickness of the middle isolation plate G is not more than 0.5 mm.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112846500A (en) * | 2020-12-31 | 2021-05-28 | 湖北三江航天红阳机电有限公司 | Welding deformation control method |
| CN113977059A (en) * | 2021-11-17 | 2022-01-28 | 山东钢铁集团日照有限公司 | Method for sealing and welding composite plate vacuum electron beam assembly |
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| CN107790865A (en) * | 2016-09-06 | 2018-03-13 | 鞍钢股份有限公司 | Assembly welding method of stainless steel composite board |
| CN108393653A (en) * | 2017-02-05 | 2018-08-14 | 鞍钢股份有限公司 | Preparation method of titanium steel composite board with IF steel as intermediate layer |
| CN109249183A (en) * | 2017-07-13 | 2019-01-22 | 鞍钢股份有限公司 | Production method of titanium steel composite steel 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 |
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| CN112846500A (en) * | 2020-12-31 | 2021-05-28 | 湖北三江航天红阳机电有限公司 | Welding deformation control method |
| CN112846500B (en) * | 2020-12-31 | 2022-11-22 | 湖北三江航天红阳机电有限公司 | Welding deformation control method |
| CN113977059A (en) * | 2021-11-17 | 2022-01-28 | 山东钢铁集团日照有限公司 | Method for sealing and welding composite plate vacuum electron beam assembly |
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