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CMT additive manufacturing method for improving tensile property of aluminum alloy

A technology of additive manufacturing and tensile properties, applied in the field of additive manufacturing, can solve problems such as restricting the promotion and application of aluminum alloy products

Inactive Publication Date: 2019-11-05
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, some unresolved outstanding problems in additive manufacturing technology restrict the promotion and application of aluminum alloy products.

Method used

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  • CMT additive manufacturing method for improving tensile property of aluminum alloy
  • CMT additive manufacturing method for improving tensile property of aluminum alloy
  • CMT additive manufacturing method for improving tensile property of aluminum alloy

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Embodiment Construction

[0015] The technical solutions of the present invention will be further described below in conjunction with specific embodiments.

[0016] The test base material involved in the present invention is aluminum alloy 6061, the specification of the test piece is 300×150×4mm, and the welding wire is ER4043. A plate surfacing test was carried out on an aluminum alloy with a plate thickness of 4 mm using DC cold metal transfer technology CMT. The CMT welder used for the test is the CMT Advanced 4000 welder from Fronius. The zinc foil used in the experiment is a metal sheet material with a size of 110×10×0.02mm. The specific chemical composition is shown in the table below.

[0017] Composition (mass percentage, wt%) Zn Al Fe Cd Cu content 99.99 0.005 0.002 0.002 0.001

[0018] Its main implementation steps are as follows:

[0019] 1. Before the surfacing test, use a wire brush to remove the oxide film on the aluminum plate until the metallic luster...

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Abstract

The invention discloses a CMT additive manufacturing method for improving the tensile property of an aluminum alloy. In the CMT additive manufacturing process of the aluminum alloy, a zinc foil sheetis added. Under the CMT electric arc action, the zinc foil sheet is melted and enters a molten pool. Zn element in the alloy generally does not exist in the form of a second phase, and is mainly uniformly dissolved in a matrix in a solid manner. Compared with a deposition part which is not added with the zinc foil sheet, crystal grains of the alloy which is added with the zinc foil sheet are refined; and the limit tensile strength and the elongation rate of the sample with the zinc foil sheet added are improved.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and more specifically relates to the additive manufacturing of aluminum alloys by using cold metal transfer (CMT) welding while adding zinc flakes, thereby improving the tensile strength of aluminum alloy deposited parts . Background technique [0002] Aluminum alloy additive manufacturing has broad market prospects, such as: aerospace and transportation. Additive manufacturing technology can realize rapid prototyping of difficult-to-machine materials and complex parts. Additive Manufacturing (AM) technology is a bottom-up manufacturing method that uses computer-aided design (CAD) data to manufacture physical parts by accumulating materials layer by layer. However, some unresolved outstanding problems in additive manufacturing technology restrict the promotion and application of aluminum alloy products. Contents of the invention [0003] The purpose of the present invention is...

Claims

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Application Information

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IPC IPC(8): B23K9/04B33Y10/00B23K103/10
CPCB23K9/044B33Y10/00
Inventor 胡绳荪勾健申俊琦田银宝
Owner TIANJIN UNIV
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