Powder preparation method for induction heating and radio frequency plasma combined atomizing powder system

A radio frequency plasma and atomization powder making technology, applied in the field of powder metallurgy, can solve the problem of difficulty in obtaining high-quality spherical powder, and achieve the effect of avoiding raw material purity and particle size restrictions, improving output and small particle size

Active Publication Date: 2018-06-15
北京金物科技发展有限公司
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  • Abstract
  • Description
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Problems solved by technology

[0008] The purpose of the present invention is to provide a pulverization method using induction heating and radio frequency plasma combined atomization pulverization system to solve the problem of existing refractory metals with high melting points, and active and high melting point metals such as titanium and titanium alloys or It is difficult to obtain high-quality spherical powder in alloy smelting

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  • Powder preparation method for induction heating and radio frequency plasma combined atomizing powder system

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Experimental program
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Effect test

Embodiment 1

[0037] Such as figure 1As shown, a pulverizing method of an induction heating and radio frequency plasma combined atomization pulverization system, the induction heating and radio frequency plasma combined atomization pulverization system includes a high frequency induction heating device 1, a radio frequency induction plasma device 2, a vacuum pumping Device 3, atomization collection device 4, separation dedusting device 5 and wire material conveying device 6, described powder making method is used for preparing titanium alloy TC4 spherical powder, comprises the following steps:

[0038] A. Raw material preparation and processing: the titanium alloy TC4 ingot-shaped billet is drawn into a φ3mm wire through a φ3mm die, and rolled into a disc shape, in HF: HNO 3 = 1:5 solution, ultrasonic cleaning at 50°C for 20 minutes, drying and use immediately;

[0039] B. Pre-vacuumize the system and establish a protective atmosphere: before atomization and pulverization, the entire syste...

Embodiment 2

[0047] Such as figure 1 As shown, a pulverizing method of an induction heating and radio frequency plasma combined atomization pulverization system, the induction heating and radio frequency plasma combined atomization pulverization system includes a high frequency induction heating device 1, a radio frequency induction plasma device 2, a vacuum pumping Device 3, atomization collection device 4, separation and dust removal device 5 and wire material conveying device 6, the powder making method is used to prepare spherical powder of metal tungsten, comprising the following steps:

[0048] A. Raw material preparation and processing: use φ2mm finished tungsten wire;

[0049] B. Pre-vacuumize the system and establish a protective atmosphere: before atomization and pulverization, the entire system is vacuumed to 10 -1 Pa, system air leakage rate < 0.005Pa L / s, and then filled with helium to establish a protective atmosphere, the system pressure is controlled at -20KPa ~ +20KPa;

...

Embodiment 3

[0057] Such as figure 1 As shown, a pulverizing method of an induction heating and radio frequency plasma combined atomization pulverization system, the induction heating and radio frequency plasma combined atomization pulverization system includes a high frequency induction heating device 1, a radio frequency induction plasma device 2, a vacuum pumping Device 3, atomization collection device 4, separation and dust removal device 5 and wire material conveying device 6, the powder making method is used to prepare spherical powder of metal tantalum, comprising the following steps:

[0058] A. Raw material preparation and processing: use φ4mm finished tantalum wire;

[0059] B. Pre-vacuumize the system and establish a protective atmosphere: before atomization and pulverization, the entire system is vacuumed to 10 -2 Pa, system air leakage rate < 0.005Pa L / s, and then filled with argon to establish a protective atmosphere, the system pressure is controlled at -40KPa ~ +40KPa;

...

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Abstract

The invention relates to a powder preparation method for an induction heating and radio frequency plasma combined atomizing powder system. The powder preparation method comprises the following steps that (1), raw materials are prepared and processed; (2), the system is pre-vacuumed and a protective atmosphere is established; (3), wire materials are straightened and conveyed; (4), high-frequency induction preheating is carried out; (5), radio frequency plasma melting is carried out; (6), powders are prepared by atomizing; (7), separation and dust removal are carried out; and (8), the powder size is graded. The powder preparation method for the induction heating and radiofrequency plasma combined atomizing powder system uses high purity metal wire material instead of the powders as the raw materials, so that the carrying of raw materials to adsorb gas and water is reduced; a technology of the high frequency induction heating combined with the radio frequency plasma smelting and gas atomization is adopted, during the whole process of heating, melting, and the gas atomization is free of pollution and impurities in the protective atmosphere, and the degree of superheat of liquid flow ordroplets is increased during the process of radio frequency plasma smelting; and high quality spherical powders can be obtained by adopting high pressure atomizing nozzles atomizing, and the yield ofmetal powders per unit time is increased.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy, in particular to a powder making method of an induction heating and radio frequency plasma combined atomization powder making system. Background technique [0002] With the vigorous development of additive manufacturing (3D printing), injection molding, thermal spraying and other technologies, high-quality spherical refractory metal powders and active metal powders are important raw materials necessary for these fields. The production of spherical refractory and active metal powders It is of great importance in the whole product production process. For refractory metals with higher melting points such as tungsten, molybdenum, tantalum, niobium, etc., as well as active and high melting point metals or alloys such as titanium and titanium alloys, it is difficult to obtain high-quality spherical shapes by conventional melting and gas atomization methods. powder. [0003] At present, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/14B33Y70/00
CPCB22F9/14B33Y70/00
Inventor 龙海明王海英郝俊杰郭志猛舒进锋李沛秦乾
Owner 北京金物科技发展有限公司
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