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A copper alloy spherical powder material applied to the first mold of jewelry 3D printing

A 3D printing, spherical powder technology, applied in the field of copper alloys, which can solve problems such as fracture damage, laser generator burnout, and molten pool boundary overflow.

Active Publication Date: 2020-10-30
DONGGUAN HYPER TECH COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of CuSn10 used for copper first mold printing are: the material is brittle after printing, and the flexibility is poor; the printed copper first mold is easily damaged by cutting, bending, twisting, grinding and other actions during the molding process. The local fine structure of the mold was broken and damaged, which made the first mold scrapped; at the same time, the surface of the copper first mold printed by CuSn10 was relatively rough (roughness reached above 10Ra / μm), which made the grinding and polishing process in the subsequent mold execution very heavy.
During high-power printing, due to the high output energy density, and the CuSn10 material itself has the characteristics of high reflectivity and good thermal conductivity, the molten pool boundary overflow phenomenon is prone to occur during printing, and the printed surface is uneven, rough, and There is also the risk of the laser generator being burned by the reflected laser during the printing process

Method used

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  • A copper alloy spherical powder material applied to the first mold of jewelry 3D printing

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment provides a copper alloy spherical powder material applied to the first mold of 3D printing of ornaments, and the material includes the following components by mass percentage:

[0029] Cu 84%;

[0030] Ni 15%;

[0031] Al 0.8%.

[0032] Sn 0.1%;

[0033] Cr 0.1%;

[0034] The preparation method of the material at least includes the following steps:

[0035] In the first step, the raw materials are weighed and mixed according to the proportions, the mixed raw materials are placed in a graphite crucible, and the graphite crucible is placed in a vacuum induction melting furnace for smelting, and the melting temperature is 1320°C;

[0036] In the second step, the alloy melt is gas-atomized and powdered with nitrogen as the medium. The atomization pressure is 0.55MPa. The alloy melt is atomized by high-pressure nitrogen into metal droplets, and the metal droplets solidify in flight in the atomization chamber. During the process, spherical powder is formed due to the surf...

Embodiment 2

[0040] This embodiment provides a copper alloy spherical powder material applied to the first mold of 3D printing of ornaments, and the material includes the following components by mass percentage:

[0041] Cu 75%;

[0042] Ni 20%;

[0043] Cr 0.8%;

[0044] Sn 4%.

[0045] Al 0.2%.

[0046] The preparation method of the material at least includes the following steps:

[0047] In the first step, the raw materials are weighed and mixed according to the proportions. The mixed raw materials are placed in a graphite crucible, and the graphite crucible is placed in a vacuum induction melting furnace for smelting at a melting temperature of 1280°C;

[0048] The second step is to use argon as the medium to atomize the alloy melt into powder. The atomization pressure is 0.55MPa. The alloy melt is atomized by high-pressure argon into metal droplets, and the metal droplets fly in the atomization chamber. During the solidification process, spherical powder is formed due to the surface tension of th...

Embodiment 3

[0052] This embodiment provides a copper alloy spherical powder material applied to the first mold of 3D printing of ornaments, and the material includes the following components by mass percentage:

[0053] Cu 80%;

[0054] Ni 16%;

[0055] Sn 2.5%;

[0056] Al 0.8%;

[0057] Cr 0.7%;

[0058] The preparation method of the material at least includes the following steps:

[0059] In the first step, the raw materials are weighed and mixed according to the proportions, the mixed raw materials are placed in a graphite crucible, and the graphite crucible is smelted in a vacuum induction melting furnace at a melting temperature of 1300°C;

[0060] In the second step, the alloy melt is gas-atomized and powdered with nitrogen as the medium, and the atomization pressure is 0.5MPa. The alloy melt is atomized by high-pressure nitrogen into metal droplets, and the metal droplets solidify in flight in the atomization chamber. During the process, spherical powder is formed due to the surface tension o...

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Abstract

The invention belongs to the technical field of copper alloys, and particularly relates to a copper alloy spherical powder material applied to an ornament 3D printing first mold. The copper alloy material comprises, by weight, 60%-85% of Cu, 10%-30% of Ni, 0.5-5% o Sn, 0.1-5% of Al and 0.1-5% of Cr. Compared with the prior art, the printing process performance is better, oxidation resistance is better, the surface of a printing piece is smooth and free of floating powder, the surface roughness can be reduced to be within 4Ra per micrometer, and the matte effect metallic luster can be achievedwithout sand blasting. Meanwhile, the printing piece adopting the material has better flexibility, the elongation percentage after breaking reaches 35% + / - 8%, and the material shows wider and flexible process ability in the subsequent mold holding process.

Description

Technical field [0001] The invention belongs to the technical field of copper alloys, and in particular relates to a copper alloy spherical powder material applied to the first mold of 3D printing of ornaments. Background technique [0002] In the traditional jewelry processing industry, wax molds are generally used in the early first molds (first hand-carved and later developed to 3D printing wax molds). For large-scale production of a certain model of jewelry or small crafts, It is necessary to turn the first version of the wax mold into a copper mold; perform mold-holding modification on the copper mold; then perform the following steps: pass the mold-holding copper mold through the glue film, turn the wax mold, and copy several wax molds; Repair molds, plant wax trees, pour plaster molds, lose wax at high temperature, precision casting and then undergo a series of post-processing procedures to obtain finished products. [0003] With the maturity of metal 3D printing technology...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/06B22F1/00B22F9/08
Inventor 李晖云崔宁
Owner DONGGUAN HYPER TECH COMPANY