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Metal powder processing technology and atomizing spray disc

A technology of metal powder and processing technology, applied in the field of metal powder processing, can solve the problems of affecting the fluidity of metal powder, reduce the oxygen content of metal powder, etc., and achieve the effect of reducing oxygen content, improving oxidation resistance, and broadening the scope of application

Active Publication Date: 2021-11-16
石家庄京元粉末材料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the patent application document with the application publication date of 2018.04.06 and the application publication number of CN107876786A discloses a method for reducing the oxidation of metal powder in water atomization pulverization. It adds silicon-containing inorganic fibers to the metal raw materials. The fiber covers the surface of the metal or alloy melt, which acts as a physical oxygen barrier, thereby reducing the oxygen content of the metal powder. However, when the metal or alloy melt is atomized with water, the water absorbs heat to form water vapor, and the metal or alloy The alloy melt releases heat to form metal powder. Due to the small amount of atomized water, the temperature of the formed metal powder is high, so the surface of the metal powder is easy to further form an oxide layer, which affects the fluidity of the metal powder.

Method used

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  • Metal powder processing technology and atomizing spray disc
  • Metal powder processing technology and atomizing spray disc
  • Metal powder processing technology and atomizing spray disc

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A metal powder processing technology, comprising the steps of:

[0044] (1) Melt the copper element and charcoal powder under nitrogen protection and at a temperature of 1500°C for 5 hours to form a mother liquor and a protective layer, and the thickness of the protective layer is 4cm;

[0045] (2) Make the mother liquor and the protective layer form a fine flow with a diameter of 1mm, and the flow rate is 4mm / s, and use high-pressure water with a temperature of 60°C and a pressure of 0.5MPa to crush and atomize the mother liquor to obtain high-temperature particle powder, and then use The low-temperature water at a temperature of 60°C rapidly cools the high-temperature granular powder to obtain a low-temperature granular powder;

[0046] (3) Collect the low-temperature particle powder by sedimentation, vacuum dehydration, drying, and sieving to obtain metal powder. The average particle size of the metal powder is 10 μm, and the oxygen content of the metal powder is 110...

Embodiment 2

[0048] A metal powder processing technology, comprising the steps of:

[0049] (1) Melt the titanium alloy and charcoal powder under nitrogen protection at a temperature of 1550°C for 4 hours to form a mother liquor and a protective layer, and the thickness of the protective layer is 8cm;

[0050] (2) Make the mother liquor and the protective layer form a fine flow with a diameter of 4mm, and the flow rate is 3mm / s, and use high-pressure water with a temperature of 50°C and a pressure of 2MPa to crush and atomize the mother liquor to obtain high-temperature particle powder, and then use temperature The low-temperature water at 50°C rapidly cools the high-temperature granular powder to obtain a low-temperature granular powder;

[0051] (3) Collect the low-temperature particle powder by sedimentation, vacuum dehydration, drying, and sieving to obtain metal powder. The average particle size of the metal powder is 70 μm, and the oxygen content of the metal powder is 120 ppm.

Embodiment 3

[0053] A metal powder processing technology, comprising the steps of:

[0054] (1) Melt the copper element and charcoal powder under nitrogen protection and at a temperature of 1580°C for 3 hours to form a mother liquor and a protective layer, and the thickness of the protective layer is 7cm;

[0055] (2) Make the mother liquor and the protective layer form a fine flow with a diameter of 3mm, and the flow rate is 2mm / s, and use high-pressure water with a temperature of 40°C and a pressure of 1.5MPa to crush and atomize the mother liquor to obtain high-temperature particle powder, and then use The low-temperature water at a temperature of 40°C rapidly cools the high-temperature granular powder to obtain a low-temperature granular powder;

[0056] (3) Collect the low-temperature particle powder by sedimentation, vacuum dehydration, drying, and sieving to obtain metal powder. The average particle size of the metal powder is 30 μm, and the oxygen content of the metal powder is 130...

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Abstract

The invention relates to a metal powder processing technology and an atomizing spray plate, which belong to the technical field of metal powder processing. Metal raw materials and charcoal powder are melted under the protection of an inert gas to form a mother liquor and a protective layer; the mother liquor and the protective layer are formed Fine flow, and use high-pressure water to crush and atomize the mother liquor to obtain high-temperature granular powder, and then quickly use low-temperature water to cool the high-temperature granular powder to obtain low-temperature granular powder; settle and recover the low-temperature granular powder, dehydrate and dry, and sieve and batch together. Metal powder is obtained. In this metal powder processing technology, charcoal powder is added to the metal raw material to improve its oxidation resistance. Through the cooperation of the high-pressure nozzle and the cooling nozzle, the high-temperature particle powder is rapidly cooled and the contact between the high-temperature particle powder and oxygen is reduced. time, reducing the content of the oxide layer on the surface of the high-temperature particle powder, reducing the oxygen content of the metal powder, improving the quality of the metal powder and the practicability of the atomizing spray disc.

Description

technical field [0001] The invention relates to the technical field of metal powder processing, more specifically, it relates to a metal powder processing technology and an atomizing spray disc. Background technique [0002] Atomization method is a common method for preparing metal powder. This method uses water or inert gas to crush metal or alloy melt to obtain powder. It can be divided into gas atomization and water atomization. Water atomization uses water as the atomization medium, and the shape of the particles obtained by atomization is irregular, with good compressibility and formability, and is an extremely important raw material for manufacturing powder metallurgy parts. [0003] At present, the patent application document with the application publication date of 2018.04.06 and the application publication number of CN107876786A discloses a method for reducing the oxidation of metal powder in water atomization pulverization. It adds silicon-containing inorganic fibe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/08
CPCB22F9/082B22F2009/088
Inventor 张英川
Owner 石家庄京元粉末材料有限责任公司
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