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Plasma-arc nodulizing device and method for iron-based intermediate alloy powder

An intermediate alloy and plasma arc technology, which is applied in the ion arc spheroidization device and the field of ion arc spheroidization, can solve the problems of uneven heating, low spheroidization efficiency, and high price, so as to improve the effect and solve the disordered input of powder concentration Effect

Inactive Publication Date: 2020-02-28
ANHUI CHUNGU 3D PRINTING INTELLIGENT EQUIP IND TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a plasma arc spheroidization device and method for iron-based master alloy powder. By controlling the spheroidization heat arc, transportation and dispersion of the powder, the powder can be heated evenly and efficiently in the ion jet, and finally prepared High-quality spherical powder to solve the above-mentioned background technology that the price of radio frequency plasma spheroidization equipment in the prior art is expensive, the dispersion performance of powder feeding is poor, the production cost is high, and it is difficult to popularize and promote; Problems of agglomeration, uneven heating and low spheroidization efficiency

Method used

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  • Plasma-arc nodulizing device and method for iron-based intermediate alloy powder
  • Plasma-arc nodulizing device and method for iron-based intermediate alloy powder

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Embodiment 1

[0030] A plasma arc spheroidization device for iron-based master alloy powder, comprising an atmosphere reaction chamber 2 and a plasma arc power supply 1, a plasma arc spray gun 5 is fixedly installed on the top of the atmosphere reaction chamber 2, and the upper part of the plasma arc spray gun 5 is connected to There is a powder delivery mechanism 6, the upper end of the powder delivery mechanism 6 is connected with a powder hopper 7, the lower end of the plasma arc spray gun 5 is equipped with a porous powder dispersion outlet plate 11, and the upper side wall of the atmosphere reaction chamber 2 A cooling air inlet 8 is provided, and a cooling air outlet 3 is provided on the lower side wall of the atmosphere reaction chamber 2. The inner wall of the atmosphere reaction chamber 2 is fixedly connected with a lifting mechanism 10 through a hollow support plate 13, so that The upper end of the lifting mechanism 10 is equipped with a rotating clamping mechanism 9, and the upper...

Embodiment 2

[0042] Different from embodiment 1, the specific implementation process of embodiment 2 is as follows:

[0043] (1) Turn on the power, ignite the plasma arc, and set the current of the plasma arc power supply 1 to 85A; the plasma gas is argon, the flow rate of the plasma gas is 2L / min, and the pressure is 0.6MPa; the protective gas is argon and hydrogen according to The volume ratio is 2:1 to 4:1, and the flow rate of protective gas is 15L / min;

[0044] (2) Screen out ferroboron powder with a diameter of 180-220 mesh, put it in the powder hopper 7, and open the powder feeding gas cylinder, the flow rate of the powder feeding gas is 5L / min, turn on the power supply of the first motor 62, and the powder feeding speed 50~350g / min;

[0045] (3) The air in the atmosphere reaction chamber 2 is pumped to 0Mpa, and the cooling gas intake switch is turned on; the cooling gas is an inert gas, the temperature of the cooling gas is 5-10°C, and the flow rate of the inert gas is 85L / min; ...

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Abstract

The invention discloses a plasma-arc nodulizing device for iron-based intermediate alloy powder. The plasma-arc nodulizing device and method for the iron-based intermediate alloy powder comprises an atmospheric reaction cavity and a plasma-arc power supply. A plasma-arc spray gun is fixedly mounted at the top of the atmospheric reaction cavity. The upper portion of the plasma-arc spray gun communicates with a powder delivery mechanism. A porous powder-dispersion outlet plate is mounted at the lower end of the plasma-arc spray gun. A lifting mechanism is fixedly connected to the inner wall of the atmospheric reaction cavity through a hollow supporting plate. A rotary clamping mechanism is mounted at the upper end of the lifting mechanism. A conical carbon bar is vertically upwards mounted on the upper portion of the rotary clamping mechanism. The positive electrode of the plasma-arc power supply is connected with the plasma-arc spray gun through a wire, and the negative electrode of theplasma-arc power supply is connected with the conical carbon bar through a wire. By the adoption of the plasma-arc nodulizing device for the iron-based intermediate alloy powder, the problem of electric-arc electrodes for plasma-arc power nodulizing is effectively solved, and the phenomenon of instable plasma arcs caused by losses of the conical carbon bar is avoided. The powder nodulizing effectis improved.

Description

technical field [0001] The invention belongs to the technical field of metal material processing, and in particular relates to a plasma arc spheroidization device for iron-based master alloy powder, and also relates to a plasma arc spheroidization method for iron-based master alloy powder. Background technique [0002] Master alloy powder can be used for composition adjustment and alloying of surface cladding strengthening, and is widely used in surface melting technology. However, due to the easy oxidation of most master alloys (titanium-ferro alloy powder, manganese-ferro alloy powder, etc.) and the difficulty of smelting master alloys, it is difficult to smelt such master alloy powders prepared by conventional gas atomization pulverization technology, and the cost of atmosphere protection is high. [0003] Radio frequency plasma spheroidization technology is a new powder spheroidization technology with high temperature, which can effectively prepare spherical high melting...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/14C22C35/00
CPCB22F9/14C22C35/005
Inventor 黄仲佳周晓宏罗贤国张勇孙文明赵薇郑兰斌吴志华王心生杨军宗泽周翔
Owner ANHUI CHUNGU 3D PRINTING INTELLIGENT EQUIP IND TECH RES INST CO LTD
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