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Laser additive and laser shock synchronous composite manufacturing method and system

A laser shock and laser additive technology, applied in the field of additive manufacturing, can solve the problems of real-time impact of the complexity of the manufacturing process, difficulty in forming non-planar parts, etc., to improve mechanical properties, inhibit the formation of columnar structures, and utilize energy. high rate effect

Inactive Publication Date: 2021-03-16
CHINA UNIV OF MINING & TECH
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Problems solved by technology

However, before the laser shock, it is necessary to lay a constrained layer and an absorbing layer on the surface of the solidified layer, and the resulting damage and replacement of the absorbing layer and the constrained layer, which leads to problems such as the complexity of the manufacturing process and the real-time nature of the shock.
In addition, this method has certain difficulties in forming non-planar parts

Method used

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  • Laser additive and laser shock synchronous composite manufacturing method and system
  • Laser additive and laser shock synchronous composite manufacturing method and system

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Embodiment Construction

[0031] The present invention will be further explained below in conjunction with the accompanying drawings.

[0032] like figure 1 As shown, a laser additive and laser shock synchronous composite manufacturing system includes: a laser additive manufacturing module and a laser shock module. The laser additive manufacturing module includes a laser 1 , a powder feeder 2 , a shielding gas delivery device 3 , a laser head 4 , a substrate 9 and a moving table 10 . The laser output from the laser 1, the metal powder conveyed by the powder feeder 2 and the shielding gas conveyed by the shielding gas conveying device 3 are output from the laser head 4 to the surface of the substrate 9 in the form of coaxial or paraxial. The motion table 10 is used to adjust the motion mode and speed of the substrate 9 relative to the laser focus. Among them, the laser 1 can be one of semiconductor lasers, gas lasers, solid-state lasers, and fiber lasers, and must output continuous laser light or puls...

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Abstract

The invention discloses a laser additive and laser shock synchronous composite manufacturing method and system. The system comprises a laser additive manufacturing module and a laser shock module; inthe laser additive manufacturing process, a beam of focused laser generated by the laser shock module acts on the surface of a molten pool, a pasty area of the rear edge of the molten pool and the surface of a high-temperature solidification area in real time; and shock waves generated by plasma induction are used for stirring the molten pool, destroying thick dendrites in the paste area and inducing residual stress in the high-temperature solidification area, so that convection of the molten pool is intensified, the temperature gradient is improved, the nucleation rate of the paste area is increased, and defects such as cracks in the high-temperature solidification area are relieved. Therefore, efficient laser additive manufacturing of high-performance metal parts can be achieved throughthe force-heat coupling effect of laser additive and laser shock synchronous compounding.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing, in particular to a laser additive composite manufacturing method for metal parts. Background technique [0002] As the most cutting-edge and difficult technology in additive manufacturing, metal parts additive manufacturing technology is an important development direction of advanced manufacturing technology. For metal parts additive manufacturing technology, according to the different types of heat sources, it can be divided into laser additive manufacturing, electron beam additive manufacturing, arc additive manufacturing, etc. Among them, laser additive manufacturing is an integrated manufacturing technology that takes into account the requirements of precise forming and high-performance forming. However, in the laser additive manufacturing process, due to the small size of the molten pool, fast cooling rate, and directional temperature gradient, the solidified metal parts have...

Claims

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Application Information

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IPC IPC(8): B22F10/28B22F12/00B22F10/60C22F3/00C21D10/00B33Y10/00B33Y30/00B33Y40/20
CPCB22F3/003B22F3/24B33Y10/00B33Y30/00B33Y40/20C21D10/005C22F3/00
Inventor 杨海峰时明天
Owner CHINA UNIV OF MINING & TECH
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