CN111235378A - Welding seam heat treatment device and method formed by friction stir welding and welding of large parts - Google Patents
Welding seam heat treatment device and method formed by friction stir welding and welding of large parts Download PDFInfo
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- CN111235378A CN111235378A CN202010108019.3A CN202010108019A CN111235378A CN 111235378 A CN111235378 A CN 111235378A CN 202010108019 A CN202010108019 A CN 202010108019A CN 111235378 A CN111235378 A CN 111235378A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
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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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
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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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/26—Auxiliary equipment
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
- C21D1/42—Induction heating
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The invention provides a welding seam heat treatment device and a welding seam heat treatment method for friction stir welding of a large-scale member, which are realized by performing welding-following synchronous local heat treatment on a friction stir welding joint of the large-scale member through a magnetic induction heating coil, and solves the problems that the member is too large and cannot be subjected to heat treatment and the deformation easily occurs during the integral heat treatment of the member; the local heat treatment is not limited by the size and the shape of a large structural part. The welding heat treatment is carried out along with the welding, the adverse effect of welding heat circulation on the base metal is considered, meanwhile, the local heat treatment of welding seams is carried out along with the welding, and the problems of weakening and non-uniformity of mechanical properties of workpieces caused by the welding heat circulation are solved. The induction coil locally heats the component, so that the structure around the welding seam is subjected to solid solution treatment to obtain a uniform supersaturated solid solution, and then artificial aging is carried out to precipitate fine dispersion strengthening phase particles in the joint. And the base material area is not subjected to the heat treatment, so that the member is ensured not to be greatly deformed.
Description
Technical Field
The invention belongs to the technical field of material welding, and particularly relates to a welding seam heat treatment device and method for large parts by friction stir welding and welding.
Background
The friction stir welding is a novel solid phase connection technology, the welding heat is provided by the violent friction and deformation of a stirring head and a workpiece, the highest temperature is lower than the melting point of the workpiece to be welded, therefore, the workpiece only generates plastic flow during welding, the melting phenomenon is avoided, protective gas is not needed in the welding process, and the welding process is green and environment-friendly. The friction stir welding is carried out on the low-melting-point aluminum alloy, so that the defects of welding air holes, welding hot cracks and the like which are often generated in the traditional melting welding process can be effectively avoided, and the residual stress after welding is small. However, the aluminum alloy is affected by the action of thermal cycle in the welding process, and the crystal grains in a heat affected zone are coarsened, so that the joint is softened. And the weld nucleus area is subjected to the violent stirring action of the stirring pin, so that the crystal grains in the area are dynamically recrystallized and refined to generate fine isometric grains. Therefore, the hardness distribution curve of the whole friction stir welding seam is W-shaped. The mechanical properties of the welded joint are severely affected by joint softening. The heat treatment of the friction stir welding joint can change the size and distribution of the strengthening phase in the joint, redistribute the strengthening phase in the joint and eliminate the softening phenomenon of the joint, thereby improving the mechanical property of the welding joint.
However, under many working conditions, the welded structural member has a large size and cannot be placed in a heat treatment working furnace for postweld heat treatment, or the working furnace for heat treatment of the structural member has a large size requirement and expensive equipment. In addition, some special components are subjected to local welding after being finished to the required size of a part drawing, and if the whole part is subjected to overall heat treatment, the problem of large part deformation exists, so that only the post-welding heat treatment needs to be carried out on a welding seam area, and the heat treatment operation is not carried out on other base metal areas, so that the accuracy of the part size is ensured.
In order to solve the problems that a large structural member is difficult to carry out heat treatment, a precise structural member only needs to carry out local heat treatment after welding and the like, the prior art mainly comprises local heat treatment of a crawler-type electric heating pad and local heat treatment of an electron beam. However, when the heating pad is used for carrying out heat treatment on the component, the heating speed is low, and the maximum heating temperature of the method is limited, so that the local tissue cannot be effectively improved; the electron beam local heat treatment method can obviously reduce the residual stress of the welding seam, but the part subjected to heat treatment by the method has larger overall deformation, so that the advantage of small deformation after friction stir welding does not exist.
Disclosure of Invention
In view of the above, the present invention provides a welding seam heat treatment apparatus and method for friction stir welding of large-sized pieces, which can solve the problem of weakening of the welding seam joint, improve the structural uniformity of the welding joint, and improve the mechanical properties of the welding joint.
A heat treatment device for welding seams formed by friction stir welding along with welding comprises a magnetic induction heating coil, a thermocouple and a temperature control module; arranging a magnetic induction heating coil above the weld joint to heat the weld joint; the thermocouples are arranged on two sides of the weld joint and used for measuring the temperature of the weld joint; the temperature control module is used for controlling the current of the magnetic induction heating coil according to the temperature fed back by the thermocouple, so as to control the heating temperature of the welding seam, namely the welding seam, and maintain the temperature of the welding seam at a set temperature value; wherein, the magnetic induction heating coil can follow the pin synchronous motion.
Preferably, the magnetic induction heating coil is supplied with alternating current with an amplitude of 500-2000A and a frequency of 300-600 Hz.
Preferably, the magnetic induction heating coil is placed immediately 10mm above the weld.
A heat treatment method of a welding seam heat treatment device formed by friction stir welding and welding comprises the following steps:
the method comprises the following steps: cleaning oil stains in the range of 20-25 mm of the welding part of the workpiece to be welded;
step two: polishing and brightening the part to be welded within the range of 20-25 mm, and removing an oxide film on the surface of the workpiece;
step three: fixing a workpiece to be welded on a working table of a welding machine;
step four: setting working parameters of a welding machine;
step five: arranging a thermocouple at the position of the welding seam;
step six: fixing a magnetic induction heating coil above a welding seam;
step seven: after the welding machine starts to work, the temperature control module controls the magnetic induction heating coil to be electrified with alternating current, the workpiece to be welded is heated to 480 ℃ from room temperature, the magnetic induction heating coil is kept to move synchronously when the stirring pin moves along a welding line, and the temperature control module adjusts the current input to the magnetic induction heating coil according to the temperature fed back by the thermocouple so that the temperature of the workpiece to be welded is maintained at 480 ℃;
step eight: after the welding is finished, performing water-cooling quenching treatment after keeping the temperature of the workpiece to be welded for 25 min; heating the quenched workpiece to 180 ℃, preserving heat for 6 hours, and cooling.
Preferably, the stirring pin for the welding machine is a cylindrical stirring pin with right-hand threads, and the length of the pin is 5.55mm-5.85 mm; the shaft shoulder of the stirring needle is provided with a groove, and the diameter is 14mm-20 mm.
Preferably, the working parameters of the welder are as follows: the inclination angle of the stirring head is 1-3 degrees; the stirring head rotates at a speed of 500 r/min to 1800 r/min; the pressing speed is 3mm-20 mm/min; the welding speed is 50mm-500 mm/min; the pressing amount is 0.05mm-0.35 mm; the rotation direction of the main shaft is anticlockwise.
The invention has the following beneficial effects:
according to the welding seam heat treatment device for the friction stir welding of the large-scale member, provided by the invention, the welding seam is formed by welding at the same time, and the synchronous local heat treatment is carried out on the friction stir welding joint of the large-scale member through the magnetic induction heating coil, so that the problems that the member is too large and cannot be subjected to heat treatment and the deformation easily occurs when the member is subjected to integral heat treatment are solved; the local heat treatment is not limited by the size and the shape of a large structural part. The welding heat treatment is carried out along with the welding, the adverse effect of welding heat circulation on the base metal is considered, meanwhile, the local heat treatment of welding seams is carried out along with the welding, and the problems of weakening and non-uniformity of mechanical properties of workpieces caused by the welding heat circulation are solved.
The heat treatment method adopts the local heat treatment which is synchronous along with welding, correlates the welding temperature field with the heat treatment process, and ensures the heat treatment process of the local welding seam. The induction coil locally heats the component, so that the structure around the welding seam is subjected to solid solution treatment to obtain a uniform supersaturated solid solution, and then artificial aging is carried out to precipitate fine dispersion strengthening phase particles in the joint. And the base material area is not subjected to the heat treatment, so that the member is ensured not to be greatly deformed.
Drawings
FIG. 1 is a schematic view of a local heat treatment process for a weld joint formed by welding;
FIG. 2 is a flow chart of the heat treatment process of the present invention;
FIGS. 3(a) and 3(b) are schematic diagrams of the change of the welded joint WNZ (nugget area) with the crystal grain before and after the weld heat treatment in real time, respectively;
FIGS. 4(a) and 4(b) are metallographic structure comparison graphs before and after the heat treatment with welding in real time, respectively;
FIG. 5 is a graph showing the tensile strength of a weld joint before and after heat treatment in real time.
Wherein, 1-welding the component; 2-a thermocouple; 3-a stirring pin; 4-friction stir welding; 5-magnetic induction heating coil.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
The invention relates to a heat treatment device for welding seams formed by friction stir welding and welding of large parts, which comprises a magnetic induction heating coil, a thermocouple and a temperature control module, wherein the magnetic induction heating coil is arranged on the thermocouple; the magnetic induction heating coil is arranged above the weld seam to locally heat the weld seam, and the thermocouples are arranged on two sides of the weld seam to measure the temperature of the weld seam; the temperature control module is used for controlling the current of the magnetic induction heating coil according to the temperature fed back by the thermocouple, so as to control the heating temperature of the magnetic induction heating coil, namely the welding seam, and maintain the temperature of the welding seam at a set temperature value, thereby realizing the local heat treatment of the friction stir welding joint. The magnetic induction heating coil can move along with the stirring pin, and local heat treatment is carried out on the welding seam in time.
The invention relates to a heat treatment method for welding seams formed by friction stir welding and welding of large parts, which mainly comprises the following steps:
the method comprises the following steps: and (3) wiping the welding position of the workpiece to be welded by using absorbent cotton dipped with acetone or absolute ethyl alcohol within the range of 20-25 mm, and cleaning oil stains on the surface of the workpiece.
Step two: polishing the part to be welded of the workpiece to be within 20-25 mm by using a steel wire brush or sand paper for brightness, and removing an oxide film on the surface of the workpiece, wherein the oxide film is Al2O3And polishing the film to a thickness of 25-40 μm.
Step three: and (3) wiping the welding position of the workpiece to be welded by using absorbent cotton dipped with acetone or absolute ethyl alcohol within the range of 20-25 mm, and cleaning residual scraps on the surface of the plate.
Step four: the special fixture is utilized to fix the 6mm aluminum alloy structural part to be welded on the working table of the welding machine, so that the workpiece is prevented from cracking and warping during welding, and the stirring head is aligned with the center of a welding line.
Step five: and programming control is performed on the numerical control machine tool. The welding parameters are as follows: the stirring pin is a cylindrical stirring pin with right-handed threads, and the length of the pin is 5.55-5.85 mm; the diameter of the groove on the shoulder belt of the stirring head shaft is 14-20 mm; the inclination angle of the stirring head is 1-3 degrees; the rotation speed of the stirring head is 500-1800 r/min; the pressing speed is 3-20 mm/min; the welding speed is 50-500 mm/min; the pressing amount is 0.05-0.35 mm; the rotation direction of the main shaft is anticlockwise, and welding is started after parameters are set.
Step six: and (3) carrying out heat treatment along with welding on the structural component, namely the welding seam, and arranging a thermocouple and a temperature feedback system at the position of the welding seam to be subjected to local heat treatment.
Step seven: and fixing the magnetic induction heating coil above a welding seam to be subjected to heat treatment, ensuring that the induction coil is laid and subjected to synchronous heat treatment synchronously with the welding process, and introducing alternating current with the amplitude of 500-2000A and the frequency of 300-600 Hz into the coil to heat the workpiece.
Step eight: and heating the structural member from room temperature to 480 ℃, and carrying out water-cooling quenching treatment on the workpiece after heat preservation for 25 min.
Step nine: heating the quenched workpiece to 180 ℃, preserving heat for 6 hours, and then cooling in air.
Step ten: and performing heat treatment along with welding, and ensuring that the whole process of heat treatment is completed on the local part of each welding line. And finally, local heat treatment of the welding seam of the friction stir welding joint of the large member is completed.
In the process of friction stir welding, a stirring pin rotating at a high speed generates heat by friction with a welding workpiece, the workpiece to be welded is heated to a plastic state, after the stirring pin is inserted into the workpiece, a shaft shoulder generates heat by friction with the workpiece to become a main heat source for welding, and in the process of advancing of a stirring head, the stirring pin extrudes plastic metal and enables the material to fully flow under the action of violent stirring. In the whole welding process, a welding joint with good appearance and excellent performance is formed through the thermal-mechanical coupling effect of the stirring head on the material.
Because the mechanical property of the welded joint processed by friction stir welding is obviously insufficient, the tensile strength can only reach about 60 percent of that of the base metal, and the requirement on the use strength can not be met under a plurality of working conditions, so that the subsequent heat treatment for improving the performance of the joint is very important. The degree of solid solution of the alloying elements and the degree of recrystallization of the crystal grains and the size of the crystal grains have important influence on the mechanical properties of the alloy. The alloy is subjected to solid solution treatment to obtain a uniform supersaturated solid solution, so that fine and uniform strengthening phases are precipitated conveniently in the aging treatment process, the hardness and the strength of the alloy are improved, and the precipitation of a precipitation phase in a joint is accelerated by carrying out artificial aging treatment after the solid solution treatment, so that the strength is improved, but the plasticity of the joint is reduced.
And the large-scale component is difficult to carry out postweld heat treatment in the heat treatment furnace, even if the component can carry out heat treatment in the heat treatment furnace, the whole size of the component can be greatly changed, and the component is further processed subsequently to ensure the precision of the workpiece. The local heat treatment can effectively solve the problem, effectively reduce the processing procedures and reduce the cost.
Example (b):
in order to fully explain the method of carrying out the present invention, a specific method of carrying out the method will now be described by taking 2195-T8 aluminum lithium alloy having a thickness of 6mm as an example.
Referring to fig. 1 and 2, after the 2195 aluminum lithium alloy integral thick plate material is subjected to T8 aging treatment, the aluminum alloy thick plate is welded by a friction stir welding numerical control machine. And (3) wiping the welding position of the workpiece to be welded by using absorbent cotton dipped with acetone or absolute ethyl alcohol within the range of 20-25 mm, and cleaning oil stains on the surface of the workpiece. Polishing the part to be welded of the workpiece to be within 20-25 mm by using a steel wire brush or sand paper for brightness, and removing an oxide film on the surface of the workpiece, wherein the oxide film is Al2O3And polishing the film to a thickness of 25-40 μm. And (3) wiping the welding position of the workpiece to be welded by using absorbent cotton dipped with acetone or absolute ethyl alcohol within the range of 20-25 mm, and cleaning residual scraps on the surface of the plate. The aluminum alloy structural member is fixed on the working table of the welding machine by using the special fixture, so that the workpiece is prevented from cracking and warping during welding, and the stirring head is aligned with the center of a welding line. And programming control is performed on the numerical control machine tool.
The welding parameters are as follows: the stirring pin is a cylindrical stirring pin with right-handed threads, and the length of the pin is 5.8 mm; the diameter of the groove on the shoulder belt of the stirring head shaft is 16 mm; the inclination angle of the stirring head is 2.5 degrees; the stirring head rotates at the speed of 1000 r/min; the pressing speed is 10 mm/min; the welding speed is 120 mm/min; the pressing amount is 0.1 mm; the rotation direction of the main shaft is anticlockwise, and welding is started after parameters are set. And moving the magnetic induction heating coil to a position 10mm above the welded joint along with welding, heating the welded sample to 480 ℃, preserving heat for 25min, and then carrying out water cooling quenching. And heating the quenched workpiece to 180 ℃, preserving heat for 6 hours, and then cooling in air. And finishing the local heat treatment method of the welding seam of the friction stir welding joint of the large member. The result shows that the solid solution temperature is 480 ℃, the heat preservation is 25min, the quenching is carried out, the aging temperature is 180 ℃, the air cooling is carried out after the heat preservation is carried out for 6h, the tensile strength of the joint can reach 420MPa, the strength coefficient of the joint is 74%, the peak value of the hardness of the joint is 160HV, and the hardness area of the joint is stable.
For example, fig. 3(a) and (b) show the change of microscopic grains before and after the treatment, fig. 4(a) and (b) show the change of microscopic metallographic phase before and after the treatment, fig. 5 shows the tensile strength comparison curve of the welded joint before and after the real-time welding heat treatment, and the three graphs can show that the microscopic property and the mechanical property of the welded joint area are improved after the welding heat treatment.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A friction stir welding is with welding and becoming the heat treatment equipment of the weld joint, wherein including magnetic induction heating coil, thermocouple and temperature control module; arranging a magnetic induction heating coil above the weld joint to heat the weld joint; the thermocouples are arranged on two sides of the weld joint and used for measuring the temperature of the weld joint; the temperature control module is used for controlling the current of the magnetic induction heating coil according to the temperature fed back by the thermocouple, so as to control the heating temperature of the welding seam, namely the welding seam, and maintain the temperature of the welding seam at a set temperature value; wherein, the magnetic induction heating coil can follow the pin synchronous motion.
2. The heat treatment device for friction stir welding with weld formation as claimed in claim 1, wherein the magnetic induction heating coil is supplied with an alternating current having an amplitude of 500 to 2000A and a frequency of 300 to 600 Hz.
3. The heat treatment apparatus for friction stir welding with weld formation according to claim 1, wherein the magnetic induction heating coil is placed 10mm above the weld formation.
4. The heat treatment method of the friction stir welding-with-welding weld joint heat treatment device based on the claim 1 is characterized by comprising the following steps:
the method comprises the following steps: cleaning oil stains in the range of 20-25 mm of the welding part of the workpiece to be welded;
step two: polishing and brightening the part to be welded within the range of 20-25 mm, and removing an oxide film on the surface of the workpiece;
step three: fixing a workpiece to be welded on a working table of a welding machine;
step four: setting working parameters of a welding machine;
step five: arranging a thermocouple at the position of the welding seam;
step six: fixing a magnetic induction heating coil above a welding seam;
step seven: after the welding machine starts to work, the temperature control module controls the magnetic induction heating coil to be electrified with alternating current, the workpiece to be welded is heated to 480 ℃ from room temperature, the magnetic induction heating coil is kept to move synchronously when the stirring pin moves along a welding line, and the temperature control module adjusts the current input to the magnetic induction heating coil according to the temperature fed back by the thermocouple so that the temperature of the workpiece to be welded is maintained at 480 ℃;
step eight: after the welding is finished, performing water-cooling quenching treatment after keeping the temperature of the workpiece to be welded for 25 min; heating the quenched workpiece to 180 ℃, preserving heat for 6 hours, and cooling.
5. The heat treatment method of the friction stir welding-with-welding-ready weld joint heat treatment device according to claim 4, wherein the stirring pin for the welding machine is a cylindrical stirring pin with right-handed threads, and the length of the stirring pin is 5.55mm to 5.85 mm; the shaft shoulder of the stirring needle is provided with a groove, and the diameter is 14mm-20 mm.
6. The heat treatment method of the friction stir welding-with-welding weld joint heat treatment device according to claim 4, wherein the working parameters of the welding machine are as follows: the inclination angle of the stirring head is 1-3 degrees; the stirring head rotates at a speed of 500 r/min to 1800 r/min; the pressing speed is 3mm-20 mm/min; the welding speed is 50mm-500 mm/min; the pressing amount is 0.05mm-0.35 mm; the rotation direction of the main shaft is anticlockwise.
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| CN202010108019.3A CN111235378A (en) | 2020-02-21 | 2020-02-21 | Welding seam heat treatment device and method formed by friction stir welding and welding of large parts |
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| CN202010108019.3A CN111235378A (en) | 2020-02-21 | 2020-02-21 | Welding seam heat treatment device and method formed by friction stir welding and welding of large parts |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112609064A (en) * | 2020-12-08 | 2021-04-06 | 中国石油天然气集团有限公司 | Friction welding type all-titanium alloy drill rod weld joint heat treatment process |
| CN113102874A (en) * | 2021-05-07 | 2021-07-13 | 哈尔滨工业大学 | Double-circulation temperature-control friction stir welding device and welding method |
| CN115383278A (en) * | 2022-08-13 | 2022-11-25 | 广东铭利达科技有限公司 | Method for improving thermal coupling of aluminum alloy friction stir welding |
| CN115725914A (en) * | 2022-11-24 | 2023-03-03 | 中南大学 | Large-scale high-strength aluminum component welding seam pulsation accumulation aging strengthening method and device |
| CN115725914B (en) * | 2022-11-24 | 2024-06-11 | 中南大学 | Method and device for reinforcing pulsation accumulation aging of welding seam of large high-strength aluminum component |
-
2020
- 2020-02-21 CN CN202010108019.3A patent/CN111235378A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112609064A (en) * | 2020-12-08 | 2021-04-06 | 中国石油天然气集团有限公司 | Friction welding type all-titanium alloy drill rod weld joint heat treatment process |
| CN113102874A (en) * | 2021-05-07 | 2021-07-13 | 哈尔滨工业大学 | Double-circulation temperature-control friction stir welding device and welding method |
| CN115383278A (en) * | 2022-08-13 | 2022-11-25 | 广东铭利达科技有限公司 | Method for improving thermal coupling of aluminum alloy friction stir welding |
| CN115725914A (en) * | 2022-11-24 | 2023-03-03 | 中南大学 | Large-scale high-strength aluminum component welding seam pulsation accumulation aging strengthening method and device |
| CN115725914B (en) * | 2022-11-24 | 2024-06-11 | 中南大学 | Method and device for reinforcing pulsation accumulation aging of welding seam of large high-strength aluminum component |
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