CN112743210A - Flash welding forming method for high-temperature alloy irregular section annular part - Google Patents
Flash welding forming method for high-temperature alloy irregular section annular part Download PDFInfo
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- CN112743210A CN112743210A CN201911055577.1A CN201911055577A CN112743210A CN 112743210 A CN112743210 A CN 112743210A CN 201911055577 A CN201911055577 A CN 201911055577A CN 112743210 A CN112743210 A CN 112743210A
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- 238000003466 welding Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 31
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 30
- 239000000956 alloy Substances 0.000 title claims abstract description 30
- 230000001788 irregular Effects 0.000 title claims abstract description 17
- 238000002309 gasification Methods 0.000 claims description 8
- 229910000601 superalloy Inorganic materials 0.000 claims description 3
- 238000009721 upset forging Methods 0.000 abstract description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000001953 recrystallisation Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
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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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/04—Flash butt 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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/36—Auxiliary equipment
Abstract
The invention discloses a flash welding forming method of a high-temperature alloy irregular section ring part, which comprises the following steps: clamping the alloy ring blank with the special-shaped section on a flash butt welding machine, enabling the distance of an opening of the alloy ring blank to be less than or equal to 8mm, electrifying the ring blank by 180KA current to enable the opening to flash, enabling the temperature of the left end surface and the temperature of the right end surface of the opening to reach 3200 ℃ of the alloy instantly, feeding the right end surface to the left end surface, stopping flashing after a burning loss area is formed by burning loss of 15-20 mm within 1 minute, and stopping feeding the right end surface of the ring blank; the temperature of the left end face and the right end face of the ring blank is reduced from 3200 ℃ to 1100 ℃ to form a high-temperature area, the distance between the left end face and the right end face of the ring blank is 10-13 mm, after the high-temperature area is subjected to upset forging welding to form an annular part with a special-shaped section, the welding seam temperature is kept to be reduced to 980 ℃ under the action of upset forging force, and the process is finished, and the welding seam temperature is called as a heat affected zone in the period from 1100 ℃ to 980 ℃. The method is mainly used for welding the high-temperature alloy annular part with the special-shaped section.
Description
Technical Field
The invention relates to a welding method, in particular to a flash welding forming method of a high-temperature alloy irregular section annular piece.
Background
Chinese patent specification CN104625375A published 5/20/2015 discloses a flash welding forming method for a nickel-based superalloy large-section ring piece, which comprises the following steps: fixing a nickel-based high-temperature alloy large-section ring blank with an opening on a clamp, switching on a power supply, and preheating by enabling current to pass through the back from the left end to the right end to form a circulating current; then the right end is driven to approach to the left end, and weak flashing is carried out; then increasing the feeding speed, adjusting the current, and carrying out strong flashing to form a temperature field; then according to the temperature field, calculating the lengths of the high-temperature mushy zone and the high-temperature texture coarsening zone so as to determine the upsetting distance and carry out upsetting; and maintaining the pressure for a period of time to complete the welding. The method comprises the steps of forming a stable and reasonable temperature field, ejecting all metal in a high-temperature mushy zone out of a matrix through upsetting, enabling the metal in a high-temperature texture coarsening zone to generate sufficient plastic deformation, and refining grains through recovery and recrystallization to obtain the flash welding ring piece. The method is mainly suitable for flash welding forming of the ring piece with a large sectional area.
When the method is adopted to weld the high-temperature alloy annular part with the irregular cross section, the longitudinal cross section of the annular part with the irregular cross section is in a non-rectangular irregular shape, the sectional area of the annular part is smaller than that of the annular part with a rectangular cross section or a large cross section with the same specification, the surface heat dissipation is fast during welding, a stable temperature field is not easy to form, the welding quality is influenced, and the defects of insufficient welding and the like occur.
Disclosure of Invention
The invention aims to solve the technical problem of providing a flash welding forming method for realizing a high-temperature alloy irregular section annular part by flashing at a high-temperature gasification temperature, which can form a gentle temperature gradient in the flash welding forming process and is beneficial to improving the welding quality.
In order to solve the technical problem, the flash welding forming method of the high-temperature alloy irregular section annular part comprises the following steps of:
clamping a high-temperature alloy special-shaped section ring blank with an opening on a flash butt welding machine, adjusting the distance between the left end face and the right end face of the opening of the ring blank to be less than or equal to 8mm, starting the flash butt welding machine to electrify the ring blank by 180KA current, so that the opening of the left end face and the right end face of the ring blank are flashed, the temperature of the two end faces instantly reaches 3200 ℃ of the gasification temperature of the alloy, and the right end face of the ring blank is fed to the left end face ceaselessly in the flashing process;
the left end face and the right end face of the opening of the ring blank are flashed at the high-temperature gasification temperature for 1 minute, the burning loss distance is 15 mm-20 mm, the flashing is stopped after a burning loss area is formed, and the feeding of the left end face and the right end face of the ring blank is stopped;
when the temperature of the left end face and the right end face of the ring blank is reduced from 3200 ℃ to 1100 ℃, forming a high-temperature area, wherein the distance between the left end face and the right end face of the ring blank is 10-13 mm, and performing upsetting operation in the high-temperature area to weld the left end face and the right end face of the ring blank together;
and (3) maintaining the welded and formed annular part with the special-shaped section under the action of upsetting force until the temperature of the welding line is reduced to 980 ℃, and finishing the whole flash welding process, wherein the period of the welding line temperature from 1100 ℃ to 980 ℃ is called a heat affected zone.
The superalloy is GH 4169; the longitudinal section of the special-shaped section ring blank is I-shaped.
Compared with the prior art, the invention has the following beneficial effects:
the flash welding forming method of the high-temperature alloy irregular section annular piece is characterized in that a ring blank is electrified by a large current of 180KA, so that the left end face and the right end face of the ring blank are flashed at the gasification temperature of 3200 ℃, and are burnt within 1 minute for a distance of 15-20 mm to form a burning loss area, and then the flashing is stopped; upsetting in a high-temperature region formed when the temperature is reduced from 3200 ℃ to 1100 ℃, wherein the upsetting distance is 10-13 mm; and (3) maintaining pressure in a heat affected zone with the welding seam temperature of 1100-980 ℃ to obtain a high-quality welded ring part. Wherein: the rapid flash burning loss building burning loss area can prevent the ring blank opening from radiating too fast, shortens the flash heating time and is beneficial to obtaining a wider upsetting deformation high-temperature area through high-temperature flash; the upset forging is carried out in a high-temperature area, so that the deformation resistance of the alloy is reduced, the re-bonding of metal atoms on two end surfaces is enhanced, the occurrence of insufficient welding is avoided, dynamic recrystallization is carried out under the action of upset forging deformation due to small deformation resistance, a welding seam forms an organization structure basically similar to a matrix, reasonable and reliable welding is realized, and the welding quality is greatly improved; and (2) maintaining pressure in a low-temperature heat affected zone, wherein the deformation resistance of the alloy is increased, deformation promotes the increase of the dislocation density of the zone under the action of upsetting stress, the high-dislocation-density zone moves under the action of temperature, edge dislocations with the same sign are vertically arranged to form small-angle grain boundaries with higher density along the direction of an easy-slip surface, one part of the small-angle grain boundaries promote the formation of fine recrystallized grains in the zone, the other part of the small-angle grain boundaries are reserved, and in the process of solution treatment after welding, the zone is statically recrystallized to form equiaxed grains. Therefore, a relatively gentle temperature gradient is established from a burning area, a high-temperature area to a heat affected area sequentially by the temperature in the process from flashing, upsetting to pressure maintaining, and high-quality welding forming of the high-temperature alloy irregular section ring part is realized.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic view of a high-temperature alloy special-shaped section ring blank clamped on a flash butt welding machine.
Fig. 2 is a sectional view taken along line a-a of fig. 1.
FIG. 3 is a schematic view of the temperature gradient of the various regions of the flash weld.
Detailed Description
The flash welding forming method of the high-temperature alloy irregular section annular piece needs to provide a flash butt welding machine, a manipulator and other equipment. The specific implementation mode of the method is explained in detail by taking a high-temperature alloy with the material brand GH4169 in China as an example:
the alloy comprises the following main chemical elements in percentage by weight: less than or equal to 0.08 percent of C, 17.0 to 21.0 percent of Cr, 50.0 to 55.0 percent of Ni, less than or equal to 1.0 percent of Co, 2.80 to 3.30 percent of Mo, 0.30 to 0.70 percent of Al, 0.75 to 1.15 percent of Ti, 4.75 to 5.50 percent of Nb, less than or equal to 0.006 percent of B, less than or equal to 0.01 percent of Mg, less than or equal to 0.35 percent of Mn, less than or equal to 0.35 percent of Si, less than or equal to 0.015 percent of P, less than or equal to 0.015 percent of S, less than or equal to 0.30 percent of Cu, less than or equal to 0.01 percent of Ca, less than or equal to 0.0005 percent of Pb, less than or equal to 0.0003 percent of Se, and the balance of Fe.
The flash welding forming process of the alloy irregular section ring piece comprises the following steps:
step 1: and (4) flashing. As shown in fig. 1, clamping a GH4169 high-temperature alloy special-shaped section ring blank 10 with an opening on a flash butt welding machine 20; the longitudinal cross-sectional shape of the ring blank 10 is shown in fig. 2 as an "i" shape, i.e., a non-rectangular cross-sectional shape. Adjusting the distance between the left end face 11 and the right end face 12 at the opening of the ring blank 10 to be less than or equal to 8mm, starting the flash butt welding machine 20 to electrify the ring blank 10 by 180KA current, so that the openings of the left end face 11 and the right end face 12 of the ring blank 10 are flashed, the temperatures of the two end faces reach the gasification temperature T3 of the alloy instantly, and the right end face 12 of the ring blank 10 is fed to the left end face 11 ceaselessly in the flashing process.
Step 2: burning loss. As shown in fig. 3, the left end face 11 and the right end face 12 at the opening of the ring blank 10 are burned for a distance S1 of 15mm to 20mm within 1 minute of flashing at a high temperature gasification temperature, flashing is stopped after the burned area 30 is formed, and feeding of the right end face 12 of the ring blank 10 to the left end face 11 is stopped.
And step 3: and (4) upsetting. As shown in fig. 3, the temperature of the left end face 11 and the right end face 12 of the ring blank 10 is reduced from T3 ℃ ═ 3200 ℃ to T2The high-temperature zone 40 is formed at 1100 ℃, in which case the distance S between the left end face 11 and the right end face 12 of the ring blank 10 is1S2The left end face 11 and the right end face 12 of the ring blank 10 are welded together by upsetting operation in the high temperature zone 40, which is 10mm to 13 mm.
And 4, step 4: and maintaining the pressure. As shown in fig. 3, the welded irregular section ring-shaped part is maintained under the action of upsetting force until the temperature of the welding seam is reduced to T1The whole flash welding process is finished after 980 ℃, and the welding seam temperature is from T21100 ℃ to T1The period at 980 ℃ is called the heat affected zone.
The invention is not limited to the ring blank with the special-shaped cross section with the I-shaped longitudinal cross section, and the ring blank with the special-shaped cross section with other longitudinal cross sections can also be welded and formed by adopting the method of the invention.
Claims (3)
1. A flash welding forming method of a high-temperature alloy irregular section ring part is characterized by comprising the following steps:
clamping a high-temperature alloy special-shaped section ring blank with an opening on a flash butt welding machine, adjusting the distance between the left end face and the right end face of the opening of the ring blank to be less than or equal to 8mm, starting the flash butt welding machine to electrify the ring blank by 180KA current, so that the opening of the left end face and the right end face of the ring blank are flashed, the temperature of the two end faces instantly reaches 3200 ℃ of the gasification temperature of the alloy, and the right end face of the ring blank is fed to the left end face ceaselessly in the flashing process;
the left end face and the right end face of the opening of the ring blank are flashed at the high-temperature gasification temperature for 1 minute, the burning loss distance is 15 mm-20 mm, the flashing is stopped after a burning loss area is formed, and the feeding of the left end face and the right end face of the ring blank is stopped;
when the temperature of the left end face and the right end face of the ring blank is reduced from 3200 ℃ to 1100 ℃, forming a high-temperature area, wherein the distance between the left end face and the right end face of the ring blank is 10-13 mm, and performing upsetting operation in the high-temperature area to weld the left end face and the right end face of the ring blank together;
and (3) maintaining the welded and formed annular part with the special-shaped section under the action of upsetting force until the temperature of the welding line is reduced to 980 ℃, and finishing the whole flash welding process, wherein the period of the welding line temperature from 1100 ℃ to 980 ℃ is called a heat affected zone.
2. The flash welding forming method for high-temperature alloy irregular section annular parts as claimed in claim 1, wherein the flash welding forming method comprises the following steps: the superalloy is GH 4169.
3. A flash welding forming method for high-temperature alloy irregular section annular parts according to claim 1 or 2, characterized by comprising the following steps: the longitudinal section of the special-shaped section ring blank is I-shaped.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911055577.1A CN112743210A (en) | 2019-10-31 | 2019-10-31 | Flash welding forming method for high-temperature alloy irregular section annular part |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911055577.1A CN112743210A (en) | 2019-10-31 | 2019-10-31 | Flash welding forming method for high-temperature alloy irregular section annular part |
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| CN112743210A true CN112743210A (en) | 2021-05-04 |
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| CN201911055577.1A Pending CN112743210A (en) | 2019-10-31 | 2019-10-31 | Flash welding forming method for high-temperature alloy irregular section annular part |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002346611A (en) * | 2001-05-24 | 2002-12-03 | Daiwa Steel Corp | Continuous rolling method for metallic materials |
| US20100051585A1 (en) * | 2008-08-28 | 2010-03-04 | Chemetron-Railway Products, Inc. | Welding head rail squaring process |
| CN102935550A (en) * | 2012-11-23 | 2013-02-20 | 贵州安大航空锻造有限责任公司 | Flash welding forming method of iron-based superalloy thin-wall ring member |
| US20130182988A1 (en) * | 2010-09-28 | 2013-07-18 | Patrik Dahlman | Flanged bearing ring and method for producing such a flanged bearing ring |
| CN104625377A (en) * | 2015-01-16 | 2015-05-20 | 唐山钢铁集团有限责任公司 | Welding process of flash butt welding low alloy and high strength steel in acid continuous rolling production line |
| CN110076439A (en) * | 2019-05-16 | 2019-08-02 | 哈尔滨瀚霖科技开发有限公司 | A kind of flash butt welding connection method for carbide-tipped cutter bit |
-
2019
- 2019-10-31 CN CN201911055577.1A patent/CN112743210A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002346611A (en) * | 2001-05-24 | 2002-12-03 | Daiwa Steel Corp | Continuous rolling method for metallic materials |
| US20100051585A1 (en) * | 2008-08-28 | 2010-03-04 | Chemetron-Railway Products, Inc. | Welding head rail squaring process |
| US20130182988A1 (en) * | 2010-09-28 | 2013-07-18 | Patrik Dahlman | Flanged bearing ring and method for producing such a flanged bearing ring |
| CN102935550A (en) * | 2012-11-23 | 2013-02-20 | 贵州安大航空锻造有限责任公司 | Flash welding forming method of iron-based superalloy thin-wall ring member |
| CN104625377A (en) * | 2015-01-16 | 2015-05-20 | 唐山钢铁集团有限责任公司 | Welding process of flash butt welding low alloy and high strength steel in acid continuous rolling production line |
| CN110076439A (en) * | 2019-05-16 | 2019-08-02 | 哈尔滨瀚霖科技开发有限公司 | A kind of flash butt welding connection method for carbide-tipped cutter bit |
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