Interlayer ultrasonic peening assisted high-performance CMT electric arc additive manufacturing method and device

A technology of ultrasonic impact and additive manufacturing, applied in the direction of electrode support devices, cleaning methods and appliances, manufacturing tools, etc., can solve the problems of deformation, collapse and growth of formed parts, reduce anisotropy and improve density , Improve the effect of strength and toughness

Pending Publication Date: 2022-06-07
JIANGSU UNIV
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Problems solved by technology

[0003] However, during the CMT arc additive forming process, the material undergoes multiple complex thermal cycles, resulting in the accumulation of internal stress and the increase of residual tensile stress, and the formed parts are prone to defects such as deformation and sag; and metallurgical defects such as unfused, involved In addition

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  • Interlayer ultrasonic peening assisted high-performance CMT electric arc additive manufacturing method and device
  • Interlayer ultrasonic peening assisted high-performance CMT electric arc additive manufacturing method and device
  • Interlayer ultrasonic peening assisted high-performance CMT electric arc additive manufacturing method and device

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[0024] The specific embodiments of the present invention are described below to facilitate those skilled in the art to understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes Such changes are obvious within the spirit and scope of the present invention as defined and determined by the appended claims, and all inventions and creations utilizing the inventive concept are within the scope of protection.

[0025] In the invention, ultrasonic impact treatment is performed on the interlayer bonding interface in the CMT arc additive manufacturing process, so as to eliminate the residual tensile stress at the interface and make the forming surface of the component uniformly plastically deform. The periodicity of equiaxed crystals is uniformly distributed, thereby effectively blocking the growth of coarse columnar β-crystals, improving the anisotr...

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Abstract

The invention belongs to the technical field of composite additive manufacturing of metal structural parts, and particularly relates to an interlayer ultrasonic peening assisted high-performance CMT electric arc additive manufacturing method and device. Through alternate work of the cold metal transition electric arc additive manufacturing control device and the harmonic wave ultrasonic impact control device, regulation and control of stress and tissue in the forming process of the electric arc additive component are achieved, and the strengthening effect is more thorough. Harmonic ultrasonic impact treatment is carried out on an interlayer bonding interface in the CMT electric arc additive manufacturing process, interface residual tensile stress is effectively eliminated, uniform plastic deformation is generated, and therefore the size of primary thick and large columnar beta crystals is regulated and controlled, and anisotropy of mechanical performance of a component is improved; the effects of reducing the grain size, eliminating metallurgical defects and integrally improving strength and plasticity are achieved.

Description

technical field [0001] The invention belongs to the technical field of composite additive manufacturing of metal structural parts, in particular to a method and a device for interlayer ultrasonic impact assisted high-performance CMT arc additive manufacturing. Background technique [0002] Arc additive manufacturing technology is a digital manufacturing technology that uses the principle of layer-by-layer cladding, uses the arc as the heat source, and gradually forms metal parts according to the three-dimensional digital model through the addition of wires. Compared with the additive manufacturing method of powder accumulation, it has significant advantages such as high deposition efficiency, high wire utilization rate, short overall manufacturing cycle, and low cost, and is especially suitable for the integrated forming of large-sized components. And CMT (Cold Metal Transfer) arc additive manufacturing technology, through the short arc and wire reversing wire feeding monito...

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Application Information

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IPC IPC(8): B23K9/133B23K9/28B23K9/32B08B3/08
CPCB23K9/133B23K9/28B23K9/32B08B3/08Y02P10/25
Inventor 吕继铭鲁金忠卢海飞罗开玉
Owner JIANGSU UNIV
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