Double-laser-beam composite additive manufacturing repairing method for metal part of complex structure
A technology for metal parts and complex structures, which is applied in the field of dual laser beam composite additive repair of metal parts with complex structures, can solve problems such as the inability to achieve laser beam impact forging areas, uneven performance of parts, etc., to improve the repair effect and strength uniform effect
Inactive Publication Date: 2019-03-29
扬州镭奔激光科技有限公司
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Problems solved by technology
[0003] For metal parts with complex structures, such as turbine discs, due to the complex structure of the tenon and groove, the interference between the tenon teeth and other parts, there are impact forging areas such as the root of the tooth that cannot realize the vertical incidence of the laser beam, and the repair process for the tooth root area with obvious stress concentration effect In the middle, due to the inconsistent impact angle, it is prone to the problem of uneven performance of the repaired parts
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[0024] The dual-laser beam composite additive repair method for metal parts with complex structures in the embodiment is used for repairing the tooth root area of a turbine disk, including the following steps.
[0025] Step S1: under the condition that the continuous laser cladding nozzles are at different inclination angles, the relationship between the powder feeding process parameters and the length of the powder beam at the nozzle is established.
[0026] The laser cladding nozzle is coaxial with the powder beam and the beam, and the powder beam convergence length at the nozzle is the distance required for the powder beam to spread to the spot diameter. Among them, the powder feeding process parameters include: the distance between the laser cladding nozzle and the repaired surface, the speed of the collimating gas, and the powder feeding rate.
[0027] Step S2: Under different inclination angles of the cladding base surface and different incident angles of the continuou...
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The invention discloses a double-laser-beam composite additive manufacturing repairing method for a metal part of a complex structure, and belongs to the field of metal part repairing technologies. The double-laser-beam composite additive manufacturing repairing method comprises the following steps that the relation between powder feeding technological parameters and the powder beam converging length at a spray head is established; a cladding lap joint experiment is conducted, and single-path cladding layer parameters are obtained; the relation between cladding area part performance parametersand short-pulse laser technological parameters at different incident angles is obtained; a model of the to-be-repaired part is generated, and a design model of the part is obtained; according to thetwo models, a laser scanning path is generated, and the maximum inclination angle of laser beams at each layer is determined; the powder feeding technological parameters are selected; continuous lasercladding technological parameters are selected; equal-strength impact forging is conducted on a cladding layer, and laser impact forging technological parameters are selected; and the laser claddingspray head and short-pulse laser beams are controlled to repair the to-be-repaired metal part. In the repairing process, equal-strength impact forging on the cladding layer is kept, the repaired partis uniform in strength, and the repairing effect is improved.
Description
technical field [0001] The invention relates to a repairing technology for metal parts, in particular to a double-laser beam composite additive repairing method for metal parts with complex structures. Background technique [0002] The composite repair process combining laser cladding and laser forging is to use the first beam of continuous laser to clad the metal powder to form a repair layer, and at the same time use the second beam of short-pulse laser to act on the surface of the deposited metal within the forging temperature range. , The metal surface absorbs the energy of the laser beam and gasifies and ionizes to form a shock wave. The process of forging the cladding layer within the forging temperature range can greatly reduce the defects of the cladding process and improve the performance of the parts. [0003] Metal parts with complex structure, such as turbine disk, due to the complex tenon and groove structure, the tenon teeth and other parts interfere with each ...
Claims
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IPC IPC(8): B23P6/00B23K26/00
Inventor 吴瑞煜周泽铭林超辉黄峰
Owner 扬州镭奔激光科技有限公司