A Method for Additive Manufacturing of Multi-material Heterogeneous Parts
An additive manufacturing and heterogeneous technology, applied in the field of additive manufacturing of multi-material heterogeneous parts, can solve the problem of difficulty in preparing multi-material heterogeneous parts, inability to prepare multi-material parts, and difficulty in changing the powder composition of the same layer and other issues to achieve the effect of easy implementation, low implementation cost and low equipment requirements
Active Publication Date: 2018-06-22
TSINGHUA UNIV
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Problems solved by technology
[0005] However, the powder bed selective melting technology is not easy to change the composition of the powder in the same layer, so it is difficult to prepare multi-material heterogeneous parts with three-dimensional composition changes.
[0006] However, whether it is a powder-feeding cladding deposition technology or a powder-bed selective melting technology, in order to prepare multi-material heterogeneous parts, at least two materials (powder or wire) with different compositions are required to be deposited in different areas. and fusion, it is not yet possible to use a single material (powder or wire) to prepare heterogeneous multi-material parts
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[0027] Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0028] A method for additive manufacturing of multi-material heterogeneous parts according to an embodiment of the present invention will be described below with reference to the accompanying drawings. Such as figure 1 As shown, the method for additive manufacturing of multi-material heterogeneous parts according to an embodiment of the present invention includes the following steps:
[0029] A) The formed layer 4 is formed by electron beam or laser selective melting using alloy powder, the alloy powder includes at least two elements, the saturated vapor pressures of the at least two elements are different from each other, and the volatilization degrees of the a...
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The invention discloses a method for additive manufacturing of multi-material heterogeneous parts. The additive manufacturing of multi-material heterogeneous parts includes the following steps: A) using alloy powder to form a forming layer through electron beam or laser selective melting, The alloy powder comprises at least two elements, the saturated vapor pressures of the at least two elements are different from each other, and the volatilization degrees of at least two elements are different from each other, during electron beam or laser selective melting, different regions of the shaped layer and / or different The forming layer applies different electron beam or laser energy to volatilize the elements contained in the alloy powder to different degrees, so that alloys with different element contents can be obtained in different regions and / or different forming layers; and B) layer by layer The fusion and stacking of each forming layer and different regions in it finally obtains a heterogeneous gradient part with a three-dimensional change in element composition. The additive manufacturing method has the advantages of simple process, easy implementation, low implementation cost, and low requirements for equipment.
Description
technical field [0001] The invention relates to the additive manufacturing of multi-material heterogeneous parts. Background technique [0002] Additive manufacturing technology is based on the principle of "discrete-stacking", and realizes the preparation of three-dimensional solid parts by adding materials layer by layer. This technology has the characteristics of short production cycle, high material utilization rate, and suitable for personalized production. At present, additive manufacturing technology can be divided into powder-feeding cladding deposition technology and powder-bed selective melting technology according to different material delivery methods. [0003] The preparation of multi-material heterogeneous parts with three-dimensional changes in material composition or microstructure is an important feature and development direction of additive manufacturing technology. [0004] Among them, the powder-feeding cladding deposition technology is based on laser or...
Claims
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IPC IPC(8): B22F3/105B33Y10/00
CPCB22F3/1007B33Y10/00B22F2999/00B22F10/00B22F10/36B22F10/366B22F10/28B22F10/32B22F2201/20Y02P10/25
Inventor 林峰闫文韬葛文君郭超张磊
Owner TSINGHUA UNIV