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High-carbon and high-alloy amorphous prealloy powder and preparation method thereof

A technology for pre-alloying powder and alloy, which is applied in the field of preparing high-carbon and high-alloy amorphous pre-alloy powder, and can solve the problems of easy clogging of atomizing nozzles, difficulty in melting and atomization of amorphous pre-alloy powder, defects of original interface pores, etc. , to achieve the effect of easy original interface, avoid melting and atomization problems, and eliminate original interface

Active Publication Date: 2019-01-04
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the difficulties in the melting and atomization stage of the amorphous pre-alloyed powder prepared in the prior art, it is easy to block the atomization nozzle, and although it can produce softening deformation during spraying, there are still problems such as the original interface or easy generation of pore defects, etc., The invention provides a high-carbon high-alloy amorphous pre-alloyed powder

Method used

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  • High-carbon and high-alloy amorphous prealloy powder and preparation method thereof
  • High-carbon and high-alloy amorphous prealloy powder and preparation method thereof
  • High-carbon and high-alloy amorphous prealloy powder and preparation method thereof

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Embodiment 1

[0037] A method for preparing high-carbon and high-alloy amorphous pre-alloyed powder, the preparation method comprising the following preparation steps:

[0038] 1) Using ferroalloy powder and elemental element powder as raw materials, weighing and mixing to obtain mixed powder;

[0039] 2) The mixed powder obtained in step 1) is mixed with WC-Co alloy balls, forming agent and ethanol are added, and then placed in a high-energy ball mill under a nitrogen atmosphere for ball milling, where the mixed powder and WC-Co alloy balls The total volume is 35% of the total capacity of the high-energy ball mill;

[0040] 3) After the ball milling is completed, the powder slurry is separated by filtration with a 200-mesh screen, and spray-dried and granulated with preheated inert gas, and then cooled to room temperature to obtain high-carbon high-alloy amorphous pre-alloy powder.

Embodiment 2

[0042] A method for preparing high-carbon and high-alloy amorphous pre-alloyed powder, the preparation method comprising the following preparation steps:

[0043] 1) Using ferroalloy powder and elemental element powder as raw materials, weighing and mixing to obtain mixed powder;

[0044] 2) The mixed powder obtained in step 1) is mixed with WC-Co alloy balls, forming agent and ethanol are added, and then placed in a high-energy ball mill under argon protective atmosphere for ball milling, where the powder and WC-Co alloy balls are mixed The total volume of is 50% of the total capacity of the high-energy ball mill;

[0045] 3) After the ball milling is completed, the powder slurry is separated by filtration with a 200-mesh screen, and spray-dried and granulated with preheated inert gas, and then cooled to room temperature to obtain high-carbon high-alloy amorphous pre-alloy powder.

Embodiment 3

[0047] A method for preparing high-carbon and high-alloy amorphous pre-alloyed powder, the preparation method comprising the following preparation steps:

[0048] 1) Using ferroalloy powder and elemental element powder as raw materials, weighing and mixing to obtain mixed powder;

[0049] 2) The mixed powder obtained in step 1) is mixed with WC-Co alloy balls, forming agent and ethanol are added, and then placed in a high-energy ball mill under a nitrogen atmosphere for ball milling, where the mixed powder and WC-Co alloy balls The total volume is 55% of the total capacity of the high-energy ball mill;

[0050] 3) After the ball milling is completed, the powder slurry is separated by filtration with a 200-mesh screen, and spray-dried and granulated with preheated inert gas, and then cooled to room temperature to obtain high-carbon high-alloy amorphous pre-alloy powder.

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Abstract

The invention belongs to the field of powder metallurgy, in particular to a preparation method of a high-carbon and high-alloy amorphous prealloy powder and aims at solving the problems that an amorphous prealloy powder prepared in the prior art is difficult at melting and atomizing stages, easily blocks atomizing nozzles, and easily produces pore defects on an original interface, although softening deformation can be generated during spraying. The high-carbon and high-alloy amorphous prealloy powder is prepared by the adopting the following process: firstly, weighing raw materials and mixingthe materials; secondly, adding hard alloy balls, a forming agent and a wet grinding medium and carrying out ball milling in a protective atmosphere; thirdly, filtering and drying, so as to obtain theprepared high-alloy amorphous prealloy powder which comprises one or more than 1 weight percent of carbon,20 or more than 20 weight percent of transition metal elements, and the balance of iron family elements. According to the preparation method disclosed by the invention, the amorphous prealloy powder is prepared by adopting mild wet milling and spraying granulation process, so that the difficult problems of melting and atomizing of a traditional melting and atomizing process in preparation of the high-carbon and high-alloy amorphous prealloy powder are solved.

Description

Technical field [0001] The invention belongs to the field of powder metallurgy, and particularly relates to a method for preparing high-carbon high-alloy amorphous pre-alloy powder. Background technique [0002] Amorphous alloy is a new type of alloy material with excellent physical, chemical, mechanical and magnetic properties. It is currently one of the hot spots in the field of international materials research. Among them, iron (Fe)-based amorphous alloys not only have the characteristics of general amorphous alloys, but also have abundant iron resources in nature, which can improve the surface corrosion resistance, wear resistance, and cavitation resistance of metal materials. Great application prospects. The formation of Fe amorphous structure benefits from the rapid cooling technology of the melt. For example, the iron-based amorphous alloy coating prepared by supersonic spraying is to heat the amorphous pre-alloyed powder to a molten or semi-molten state by thermal sprayi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/02B22F1/00B22F9/04B22F9/02
CPCB22F1/0003B22F9/026B22F9/04B22F2009/043C22C45/02
Inventor 张惠斌郑国渠陈小明张磊
Owner ZHEJIANG UNIV OF TECH