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Method for improving grain size of additive manufacturing

A technology of additive manufacturing and grain size, which is applied in the field of improving the grain size of additive manufacturing, and can solve problems such as the influence of mechanical properties of components

Active Publication Date: 2019-11-22
慧通联合智能制造(天津)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when using CMT welding technology for arc additive manufacturing of metal components, a large number of columnar crystals formed will have a certain impact on the mechanical properties of the components.

Method used

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  • Method for improving grain size of additive manufacturing
  • Method for improving grain size of additive manufacturing
  • Method for improving grain size of additive manufacturing

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Embodiment Construction

[0026] Further illustrate technical scheme of the present invention below in conjunction with specific embodiment:

[0027] The metal arc additive manufacturing test substrate involved in the present invention is aluminum alloy 6061, the size of the substrate is 300×150×4mm, and the welding wire is ER4043. The direct current cold metal transfer technology (cold metal transfer, CMT) was used to conduct the experiment of arc additive manufacturing of aluminum alloy. The CMT welder used for the test is the CMT Advanced 4000 welder from Fronius.

[0028] Table 1 Material Composition List

[0029]

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PUM

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Abstract

The invention discloses a method for improving the grain size of additive manufacturing. The method comprises the following steps of carrying out ultrasonic vibration in a CMT additive manufacturing process, and carrying out ultrasonic impact treatment on the surface of a formed component, so that plastic deformation is generated on the surface of the component, and grains of the surface layer ofthe component are refined. According to the method for improving the grain size of the additive manufacturing, the composite additive manufacturing of CMT and the ultrasonic vibration is adopted, theultrasonic impact treatment is carried out after manufacturing, so that the grain size of the component is reduced, and then the density and the mechanical property of the component obtained through the additive manufacturing are improved.

Description

technical field [0001] The invention relates to the field of arc additive manufacturing, and more specifically, relates to a method for improving the grain size of additive manufacturing. Background technique [0002] Cold metal transfer (CMT) technology is a low heat input welding process successfully developed by Austrian Fronius company on the basis of steel and aluminum welding, spatter-free arc ignition technology and micro-joint technology. The innovation of CMT technology lies in the combination of the droplet transfer and the wire feeding process to truly realize spatter-free welding; due to the effective control of the droplet transfer process, the arc additive manufacturing of metal components can be realized while reducing the welding heat input shaping control. Additive manufacturing (AM) technology is a technology that manufactures solid parts by accumulating materials layer by layer. Compared with traditional cutting technology, it is a bottom-up material accu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F3/00C21D10/00B33Y40/00
CPCB33Y40/00C21D10/00C22F3/00
Inventor 胡绳荪田银宝申俊琦勾健王万东
Owner 慧通联合智能制造(天津)有限公司
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