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Method for preparing Mo powder and Mo alloy spherical powder for additive production

A technology of additive manufacturing and spherical powder, which is applied in the field of additive manufacturing and can solve problems such as poor powder fluidity and poor powder shape

Inactive Publication Date: 2018-04-06
SINO EURO MATERIALS TECH OF XIAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the deficiencies in the prior art, the object of the present invention is to provide the preparation method of Mo powder and Mo alloy spherical powder for additive manufacturing, which solves the problem of poor powder shape and powder in the process of preparing metal Mo and Mo alloy by traditional methods. The problem of poor fluidity; ensure that the Mo and Mo alloy spherical powders for additive manufacturing are uniform in composition, fine in structure, and excellent in performance, meeting the requirements of engineering applications

Method used

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  • Method for preparing Mo powder and Mo alloy spherical powder for additive production

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Experimental program
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Effect test

Embodiment 1

[0027] The preparation method of the Mo alloy spherical powder for additive manufacturing comprises the following steps:

[0028] 1) According to the ingredients of Mo alloy, vacuum induction melting and electroslag remelting are used to melt Mo alloy rods;

[0029] 2) Finish turning the smelted Mo alloy rod into a Mo alloy electrode rod. The diameter of the processed Mo alloy electrode rod is 55mm, the length is 700mm, the roundness deviation is 0.03mm, the straightness deviation is 0.045mm / 450mm, and the roughness is 1.22 μm;

[0030] 3) Load the Mo alloy electrode rod into the reaction chamber, and evacuate the reaction chamber to 2×10 -3 Pa, fill the reaction chamber with helium, so that the pressure in the chamber is 0.13MPa, and the oxygen content in the atmosphere is less than 0.1wt%;

[0031] 4) The power of the plasma gun of PREP milling equipment is 200kW. The plasma gun contains tungsten cathode and copper anode. The Mo alloy electrode rod is not used as an electr...

Embodiment 2

[0035] The preparation method of the Mo alloy spherical powder for additive manufacturing comprises the following steps:

[0036] 1) According to the ingredients of Mo alloy, vacuum induction melting and electroslag remelting are used to melt Mo alloy rods;

[0037] 2) Finish turning the smelted Mo alloy rod into a Mo alloy electrode rod. The diameter of the processed Mo alloy electrode rod is 10mm, the length is 600mm, the roundness deviation is 0.025mm, the straightness deviation is 0.025mm / 650mm, the roughness 0.58μm;

[0038] 3) Load the Mo alloy electrode rod into the reaction chamber, and evacuate the reaction chamber to 7×10 -3 Pa, fill the reaction chamber with argon, so that the pressure in the chamber is 0.14MPa;

[0039] 4) The power of the plasma gun of PREP powder making equipment is 100kW. The plasma gun contains tungsten cathode and copper anode. The Mo alloy electrode rod is not used as an electrode. The plasma heats the end of the Mo alloy electrode rod, and...

Embodiment 3

[0044] The preparation method of the Mo alloy spherical powder for additive manufacturing comprises the following steps:

[0045] 1) According to the ingredients of Mo alloy, vacuum induction melting and electroslag remelting are used to melt Mo alloy rods;

[0046] 2) The smelted Mo alloy rod is fine-turned into a Mo alloy electrode rod. The diameter of the processed Mo alloy electrode rod is 100mm, the length is 800mm, the roundness deviation is 0.06mm, the straightness deviation is 0.04mm / 800mm, and the roughness 1.23μm;

[0047] 3) Load the Mo alloy electrode rod into the reaction chamber, and evacuate the reaction chamber to 3×10 -3 Pa, fill the reaction chamber with a mixture of helium and argon, so that the pressure in the chamber is 0.14MPa;

[0048]4) The power of the plasma gun of the PREP milling equipment is 300kW. The plasma gun contains tungsten cathode and copper anode. The Mo alloy electrode rod is not used as an electrode. The plasma heats the end of the Mo ...

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Abstract

The method for preparing Mo powder and Mo alloy spherical powder for additive production includes the following steps that 1), smelted Mo rods and Mo alloy rods are finish-machined into Mo electrode rods and Mo alloy electrode rods; 2), the Mo electrode rods and the Mo alloy electrode rods are loaded to a reaction chamber, the reaction chamber is vacuumized, and inert gas is introduced into the reaction chamber according to a certain proportion; 3), a plasma gun contains a tungsten cathode and a copper anode, the Mo electrode rods and the Mo alloy electrode rods are not used as the electrode,the ends of the Mo electrode rods and the ends of the Mo alloy electrode rods are heated and uniformly melted, atomized droplets are thrown away from the ends of the Mo electrode rods and the ends ofthe Mo alloy electrode rods, and the droplets are rapidly cooled into spherical particles in an inert gas environment and fall into a collector; and 4), the obtained Mo powder and Mo alloy powder aresieved and packaged under the inert gas protection environment. The Mo powder and Mo alloy powder prepared through the method have the ultra-fine, high-purity, high-grade spherical, free-of-hollow-powder and free-of-satellite-powder characteristics.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to a method for preparing Mo powder and Mo alloy spherical powder for additive manufacturing. Background technique [0002] Mo and Mo alloys are widely used in steel, electronics, electrical and Metal processing, aerospace, nuclear industry and other fields. For example: Mo and Mo alloys can be used as gas turbine blades, guide vanes, nozzles, nose cones, impact engine nozzles, flame guides and combustion chambers of aircraft jet engines operating at 1000-1650 ° C, and can also be used as High temperature resistant parts such as skins, nozzles, flame baffles and airfoils of spacecraft. [0003] With the rapid development of additive manufacturing technology, new requirements are put forward for its most important raw material - metal powder. At the 7th Laser Additive Manufacturing Symposium held in the United States in 2015, Ingomar Kelbassa, chairman o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/14B22F1/00B33Y70/00
CPCB22F9/14B33Y70/00B22F1/065
Inventor 相敏左振博闫飞宋嘉明韩志宇兰剑李晨夕王庆相梁书锦张平祥
Owner SINO EURO MATERIALS TECH OF XIAN CO LTD
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