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Equipment of restraining spheroidized molybdenum powder of direct current plasma temperature field and method

A technology of plasma and spheroidizing molybdenum powder, which is applied in the field of powder metallurgy powder spheroidization, can solve the problems of uneven temperature field, large temperature field gradient, and low spheroidization rate, etc., and achieves prolonged residence time, simple operation, and improved The effect of nodulization quality

Active Publication Date: 2015-06-10
JINDUICHENG MOLYBDENUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

DC plasma is mainly used in the coating technology of certain matrix materials, but it is relatively rare to be used in the preparation of spheroidized molybdenum powder. Disadvantages such as large and uneven temperature field

Method used

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  • Equipment of restraining spheroidized molybdenum powder of direct current plasma temperature field and method
  • Equipment of restraining spheroidized molybdenum powder of direct current plasma temperature field and method
  • Equipment of restraining spheroidized molybdenum powder of direct current plasma temperature field and method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as figure 1 , figure 2 , image 3 and Figure 4A device for spheroidizing molybdenum powder with direct current plasma temperature field confinement as shown, includes a temperature field confinement system and a plasma torch 8, and the temperature field confinement system includes a temperature field confinement tank 1 and is fixedly installed in the temperature field confinement tank 1. The end cover 3 at the top, the plasma torch head 8 is installed at the center of the end cover 3, and a working gas inlet 10 is installed on the end cover 3 and at the periphery of the plasma torch head 8, and the end cover The middle part of 3 is provided with an annular end cover cooling chamber 11, the main part of the temperature field constrained tank 1 is provided with an annular tank body cooling chamber 4 along the circumferential direction, and the lower part of the temperature field constrained tank 1 is provided with an annular tank body The cooling chamber 4 is co...

Embodiment 2

[0048] In this embodiment, the equipment for confining the spheroidized molybdenum powder by the DC plasma temperature field of the present invention is the same as that in Embodiment 1.

[0049] In the present embodiment, the method for spheroidizing molybdenum powder using the equipment of the present invention is as follows: firstly feed cooling water / gas into the cooling water / gas inlet 6, and secondly feed argon gas into the protective gas pipeline 2 as the protective gas , and then pass into the working gas in the working gas inlet 10, the working gas is hydrogen, or argon, or a mixed gas of hydrogen and argon; then energize the plasma torch head 8, and adjust the power of the plasma torch head 8 to be 45kW , the ionized working gas generates DC plasma; finally, the molybdenum powder to be spheroidized is uniformly collided with the powder feeding gas into the temperature field restraint tank 1, and the powder feeding rate of the molybdenum powder to be spheroidized is ad...

Embodiment 3

[0051] In this embodiment, the equipment for confining the spheroidized molybdenum powder by the DC plasma temperature field of the present invention is the same as that in Embodiment 1.

[0052] In the present embodiment, the method for spheroidizing molybdenum powder using the equipment of the present invention is as follows: firstly feed cooling water / gas into the cooling water / gas inlet 6, and secondly feed argon gas into the protective gas pipeline 2 as the protective gas , and then pass into the working gas in the working gas inlet 10, the working gas is hydrogen, or argon, or a mixed gas of hydrogen and argon; then energize the plasma torch head 8, and adjust the power of the plasma torch head 8 to be 60kW , the ionized working gas generates DC plasma; finally, the molybdenum powder to be spheroidized is sent into the temperature field restraint tank 1 through the uniform collision of the powder feeding gas, and the powder feeding rate of the molybdenum powder to be sphe...

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Abstract

The invention discloses equipment of restraining spheroidized molybdenum powder of a direct current plasma temperature field and a method. The equipment comprises a temperature field restraining system and a plasma gun head, wherein the temperature field restraining system comprises a temperature field restraining tank and an end cover installed on the top of the temperature field restraining tank, a work gas inlet is formed in the end cover, an annular end cover cooling cavity is arranged in the end cover, the temperature field restraining tank is provided with an annular tank body cooling cavity, the lower portion of the temperature field restraining tank is provided with a cooling water / gas inlet, the annular tank body cooling cavity is communicated with the annular end cover cooling cavity through a cooling water / gas pipeline, the annular end cover cooling cavity is further communicated with a cooling water / gas outlet, the temperature field restraining tank is provided with a powder feeding pipeline, the powder feeding pipeline enables to-be-spheroidized molybdenum powder to be uniformly clashed and fed into the temperature field restraining tank through a homogeneous powder mixing distributor, and the temperature field restraining tank is provided with a protective gas pipeline. The invention further provides the method for spheroidizing of the molybdenum powder by means of the equipment. The sphericity degree of the molybdenum powder after spheroidizing by means of the equipment and the method is good, and the spheroidizing rate is high.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy powder spheroidization, and in particular relates to equipment and a method for spheroidizing molybdenum powder constrained by a DC plasma temperature field. Background technique [0002] Plasma is a form of matter mainly composed of free electrons and charged ions. It exists widely in the universe and is often regarded as the fourth state of matter. It is called the plasma state. It accounts for the entire universe. 99%. [0003] Plasma is widely used in industry, such as plasma smelting technology, which is used to smelt high melting point materials that are difficult to smelt by ordinary methods; plasma spraying technology, spraying special material powder into thermal plasma to melt, and spraying it on the substrate ( Components) to rapidly cool and solidify to form a protective layer on the substrate to improve the high temperature resistance, oxidation resistance, corrosion resist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/08B22F9/14
Inventor 左羽飞武洲陈强胡林冯鹏发张常乐
Owner JINDUICHENG MOLYBDENUM CO LTD
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