Multi-laser polishing and reinforcing method for surfaces of additive manufacturing metal parts

Abstract

The invention discloses a multi-laser polishing and reinforcing method for surfaces of additive manufacturing metal parts, and the polishing on the surfaces of the additive manufacturing metal parts can be realized by repeatedly scanning and processing the surfaces of the additive manufacturing metal parts through utilizing millisecond pulse laser and nanosecond pulse laser; during the multi-laser scanning polishing process, the additive manufacturing metal parts are subjected to thermal preservation treatment, so that the stress on the surfaces of the additive manufacturing metal parts can be evenly distributed; laser scanning reinforcement is carried out on the surfaces of the laser-polished additive manufacturing metal parts, so that the stress state on the surfaces of the additive manufacturing metal parts can be changed into pressure stress from tensile stress, the anti-fatigue property of the additive manufacturing metal parts can be enhanced, and the usage performance of the metal parts can be met; compared with a manual polishing method, the multi-laser polishing and reinforcement efficiency of the additive manufacturing metal parts is high and is as 20 times as that of the manual polishing, the non-contact rapid polishing of the additive manufacturing metal parts can be realized, the tensile stress, caused by the laser polishing, of the additive manufacturing metal parts can be eliminated, and the anti-fatigue property of the additive manufacturing metal parts can be enhanced.

Description

【Technical field】 [0001] The invention relates to the technical field of surface treatment and surface strengthening of metal materials, in particular to a method for multiple laser polishing and strengthening of the surface of metal parts manufactured by additive manufacturing. 【Background technique】 [0002] With the improvement of manufacturing capacity, higher requirements are put forward for the surface polishing quality and polishing requirements of complex surface structural parts such as additive manufacturing parts. For parts with simple structures, after machining, the surface roughness can meet the requirements of metal performance of parts. However, for rapid manufacturing parts such as metal powder direct forming parts, repair parts, and precision casting parts with complex structures, machining is difficult to meet the performance of metal parts. [0003] The surface roughness of the additively manufactured parts is relatively large, which cannot be directly a...

AI Technical Summary

Problems solved by technology

However, for rapid manufacturing parts such as metal powder direct forming parts, repair parts, and precision casting parts with complex structures, machining is difficult to meet the performance of metal parts

[0003] The surface roughness of the additively manufactured parts is relatively large, which cannot be directly applied in industry and needs to be polished; the shape of the additively manufactured parts such as the overall blisk manufactured by additive manufacturing is complex and has many curved surfaces, so it is impossible to use mechanical equipment for surface polishing , in the prior art, manual polishing is used for polishing; however, the quality of manual polishing depends on the technical level of the polishing personnel, the polishing quality is poor, the polishing efficiency is low, and the labor intensity is high; it affects the performance of additively manufactured parts