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Al-Zn-Mg-Cu alloy wire and arc additive manufacturing method

A technology of additive manufacturing and electric arc, which is applied in the field of wire arc additive manufacturing of Al-Zn-Mg-Cu alloy, can solve the problems of performance degradation of additive body, coarsening of microstructure, limited action area of ​​stirring needle, etc. , to prevent overheating, improve mechanical properties, and high flexibility

Active Publication Date: 2019-05-28
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the additive body is modified by the method of friction stir processing, the action area of ​​the stirring pin is limited, and the metal on the side wall of the additive body is difficult to be processed, and the metal on the side wall still retains the characteristics of the casting structure; in addition, the front layer is stirred During the subsequent arc additive manufacturing or friction stir processing modification of the deposited metal modified by friction processing, the microstructure will be coarsened due to multiple thermal cycles, resulting in a decrease in the performance of the additive body

Method used

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  • Al-Zn-Mg-Cu alloy wire and arc additive manufacturing method
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  • Al-Zn-Mg-Cu alloy wire and arc additive manufacturing method

Examples

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Effect test

Embodiment 1

[0030] Such as Figure 1 to Figure 4 As shown, this example provides 7075 (Al-4.5Zn-1.1Mg) aluminum alloy wire arc additive manufacturing method for straight wall, comprising the following steps:

[0031] Step 1. Use cooling roller to assist arc additive forming: Use 3D drawing software to draw a straight wall model with a size of 200mm (length) × 40mm (height) × 12mm (width), and use slicing software to layer the part model Slice processing, obtain layered slice data, use simulation software to simulate layered slice data and optimize the forming path, generate robot control code (or NC code), import robot control code into welding robot, use welding robot, adopt The arc generated by the MIG welding machine is the heat source, and the 7075 aluminum alloy wire arc additive forming is performed on the T-shaped substrate 1 prepared in advance, and a total of 2 to 4 layers are deposited to form a multi-layer deposited metal 2, and the formed multi-layer deposited metal The wid...

Embodiment 2

[0044] This example provides The 7075 (Al-5.2Zn-2.2Mg-1.4Cu) aluminum alloy wire arc additive method for manufacturing straight wall, comprising the following steps:

[0045] Step 1. Use cooling roller to assist arc additive forming: Use 3D drawing software to draw a straight wall model with a size of 200mm (length) × 40mm (height) × 42mm (width), and use slicing software to layer the part model Slice processing, obtain layered slice data, use simulation software to simulate layered slice data and optimize the forming path, generate robot control code (or NC code), import robot control code into welding robot, use welding robot, adopt The arc generated by the TIG welding machine is the heat source, and the 7075 aluminum alloy wire arc additive forming is performed on the T-shaped substrate 1 prepared in advance, and a total of 2 to 4 layers are deposited to form a multi-layer deposited metal 2, and the formed multi-layer deposited metal The width of 2 is 42mm, and the multi-...

Embodiment 3

[0058] Such as Figure 1 to Figure 4 As shown, this example provides 7075 (Al-4.5Zn-1.1Mg) aluminum alloy wire arc additive manufacturing method for straight wall, comprising the following steps:

[0059] Step 1. Use cooling roller to assist arc additive forming: Use 3D drawing software to draw a straight wall model with a size of 200mm (length) × 40mm (height) × 12mm (width), and use slicing software to layer the part model Slice processing, obtain layered slice data, use simulation software to simulate layered slice data and optimize the forming path, generate robot control code (or NC code), import robot control code into welding robot, use welding robot, adopt The arc generated by the MIG welding machine is the heat source, and the 7075 aluminum alloy wire arc additive forming is performed on the T-shaped substrate 1 prepared in advance, and a total of 2 to 4 layers are deposited to form a multi-layer deposited metal 2, and the formed multi-layer deposited metal The wid...

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Abstract

The invention provides an Al-Zn-Mg-Cu alloy wire and arc additive manufacturing method. The manufacturing method comprises the following steps of (1) conducting arc additive forming through cooling and rolling assistance; (2) conducting milling on the side face and the top face of an additive material body; (3) conducting friction stir processing on the additive material body through friction stirprocessing equipment and conducting cooling and rolling on the sidewalls of the additive material body through a cooling and rolling device during friction stir processing; (4) conducting finish milling on the upper surface of the additive material body to make preparation for the next step of arc additive forming; and (5) cyclically repeating the above steps until final forming of a part is completed. Through the Al-Zn-Mg-Cu alloy wire and arc additive manufacturing method, dendritic growth and grain refinement in the Al-Zn-Mg-Cu alloy additive forming process can be completely abolished, and the deficiencies such as pores and cracks are effectively repaired; meanwhile, during the wire and arc additive manufacturing and modifying process, microstructure roughening caused by overheat of the additive material body is prevented through cooling, and the mechanical performance, especially plasticity and fatigue performance, of the additive material body is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of metal additive manufacturing, and relates to a wire arc additive manufacturing method for Al-Zn-Mg-Cu alloy, in particular to an Al-Zn-Mg- Wire arc additive manufacturing method of Cu alloy. Background technique [0002] Metal wire arc additive manufacturing (Wire and Arc Additive Manufacture, WAAM) uses gas metal arc welding (GMAW), argon tungsten arc welding (GTAW) or plasma arc welding (PAW) as the heat source, using discrete, The principle of stacking is an advanced manufacturing technology for surfacing and welding three-dimensional metal parts layer by layer from line-surface-body under the control of the program through the addition of metal wires according to the three-dimensional digital model. Compared with the additive manufacturing technology using laser and electron beam as heat source, it has the following advantages: 1) high deposition rate and high wire utilization rate, low manufacturing...

Claims

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Application Information

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IPC IPC(8): B23P15/00
Inventor 何长树韦景勋李颖张志强田妮秦高梧
Owner NORTHEASTERN UNIV
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