Metal powder material additive manufacturing method under ultrahigh pressure inert gas shielding

A metal powder additive and manufacturing method technology, which is applied in the field of additive manufacturing of superalloy and titanium alloy powder, can solve problems such as insufficient density, weak powder bonding, and poor process stability, so as to reduce deformation and improve internal Quality, the effect of improving density

Active Publication Date: 2016-01-20
ADVANCED FOR MATERIALS & EQUIP
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0004] Additive manufacturing technology provides a new way for the manufacture of high-temperature alloys and key components of titanium alloys for aerospace. However, there are still problems in additive manufacturing technology such as low internal quality, insufficient density, and poo

Method used

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  • Metal powder material additive manufacturing method under ultrahigh pressure inert gas shielding

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Comparison scheme
Effect test

Embodiment 1

[0022] Such as figure 1 , a device for additive manufacturing of metal powder under the protection of ultra-high pressure inert gas. The additive manufacturing molding equipment is a metal-based 3D printer 1 (SLM500 metal-based 3D printer from SLMSolutions GmbH in Germany). A pressurized cabin 2 is set outside the printer. Before the laser beam / electron beam prints the part layer by layer according to the scanning path, argon gas is injected into the pressurized chamber. The method of additive manufacturing is selective laser sintering (SLM).

[0023] The shape of the pressurized cabin 2 is a sealed cuboid, and the pressurized cabin is connected with a high-pressure gas pipe 3 and a booster pump 4 . The size of the pressurized cabin 2 is 4100*3100*2600mm, made of stainless steel, and an observation mirror is arranged on the bulkhead.

[0024] Using the device of this example, TC4 spherical powder is used as raw material (powder particle size 10-30 μm), and the structural part...

Embodiment 2

[0026] Using the device in this example, print with selective laser sintering (SLM), use NiMo16Cr16Ti superalloy powder as raw material (powder particle size 10-20μm), and print structural parts under the conditions of pressure 10MPa and temperature 1550°C, forming The grain size of the casting is fine and uniform, the density is high, and the mechanical properties are good, which can reach or exceed the level of castings with the same composition.

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Abstract

The invention provides a metal powder material additive manufacturing method under ultrahigh pressure inert gas shielding. A pressurized cabin is designed outside material additive manufacturing forming equipment and communicated with the material additive manufacturing forming equipment, before parts are printed by high-energy laser beams/electron beam layer by layer according to a scanning path, inert gases such as Ar and He are injected into the pressurized cabin, and the high pressure in the pressurized cabin and the material additive manufacturing forming equipment is kept all the time. By means of the material additive manufacturing method under ultrahigh pressure inert atmosphere, high-property metal parts are directly manufactured, and the method is particularly suitable for material additive manufacturing of active easily-oxidized metal such as high temperature alloy and titanium alloy. The method has the following remarkable advantages that (1) the inner qualities of the metal parts are improved; (2) deformation and cracking phenomena during printing are reduced; (3) the compactness of the metal printed parts is improved to a certain degree; (4) invasion of harmful gases is effectively prevented during printing.

Description

technical field [0001] The invention belongs to the field of metal powder additive manufacturing, and in particular relates to an additive manufacturing technology suitable for metal powder, especially superalloy and titanium alloy powder. Background technique [0002] Metal parts such as superalloys and titanium alloys are widely used in high-end fields such as aerospace. If high-temperature alloy and titanium alloy metal parts are processed by the traditional forging + machining (subtractive manufacturing) method, not only heavy forging equipment is required, but also the manufacturing process is numerous and the process is complicated, the machining allowance of the parts is large, and the material utilization rate is low. , High manufacturing cost. [0003] As a rookie in the manufacturing industry, additive manufacturing technology is a revolutionary new manufacturing technology. It uses a layer-by-layer "printing" method to print out the designed or scanned products ...

Claims

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Application Information

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IPC IPC(8): B22F3/105B22F3/115
CPCY02P10/25
Inventor 戴煜谭兴龙邓军旺李礼易志明
Owner ADVANCED FOR MATERIALS & EQUIP
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