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A kind of high-carbon high-alloy amorphous pre-alloyed powder and preparation method thereof

A pre-alloy powder and alloy technology, which is applied in the field of high-carbon and high-alloy amorphous pre-alloy powder preparation, can solve the problems of original interface pore defects, difficulties in the melting and atomization stages of amorphous pre-alloy powder, and easy blockage of atomizing nozzles, etc. , to achieve the effect of eliminating the original interface, avoiding the problems of smelting and atomization, and making the original interface easier

Active Publication Date: 2020-08-18
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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  • A kind of high-carbon high-alloy amorphous pre-alloyed powder and preparation method thereof
  • A kind of high-carbon high-alloy amorphous pre-alloyed powder and preparation method thereof
  • A kind of high-carbon high-alloy amorphous pre-alloyed powder and preparation method thereof

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Effect test

Embodiment 1

[0037] A preparation method of 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) Mix the mixed powder obtained in step 1) with WC-Co alloy balls, add forming agent and ethanol, and then place in a high-energy ball mill for ball milling under nitrogen protection atmosphere, wherein 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 ball milling, filter and separate the powder slurry with a 200-mesh screen, spray dry and granulate with preheated inert gas, and obtain high-carbon and high-alloy amorphous pre-alloyed powder after cooling to room temperature.

Embodiment 2

[0042] A preparation method of 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) Mix the mixed powder obtained in step 1) with WC-Co alloy balls, add a molding agent and ethanol, and then place it in a high-energy ball mill for ball milling under the condition of an argon protective atmosphere, wherein the mixed powder and WC-Co alloy balls The total volume is 50% of the total capacity of the high energy ball mill;

[0045] 3) After ball milling, filter and separate the powder slurry with a 200-mesh screen, spray dry and granulate with preheated inert gas, and obtain high-carbon and high-alloy amorphous pre-alloyed powder after cooling to room temperature.

Embodiment 3

[0047] A preparation method of 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) Mix the mixed powder obtained in step 1) with WC-Co alloy balls, add forming agent and ethanol, and then place in a high-energy ball mill for ball milling under nitrogen protection atmosphere, wherein 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 ball milling, filter and separate the powder slurry with a 200-mesh screen, spray dry and granulate with preheated inert gas, and obtain high-carbon and high-alloy amorphous pre-alloyed powder after cooling to room temperature.

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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, in particular to a method for preparing high-carbon and high-alloy amorphous pre-alloyed powder. Background technique [0002] Amorphous alloy is a new type of alloy material with excellent physical, chemical, mechanical and magnetic properties, and is one of the hot spots in the current international material research field. Among them, iron (Fe)-based amorphous alloys not only have the characteristics of general amorphous alloys, but also have abundant iron resources in nature. Great application prospects. The formation of Fe amorphous structure benefits from the rapid cooling technology of the melt, such as the iron-based amorphous alloy coating prepared by supersonic spraying, that is, the amorphous pre-alloy powder is heated to a molten or semi-molten state by thermal spraying, and then extremely Deposited on the surface of the substrate at a fast speed, and with 10 6 A rapidly quenched m...

Claims

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Application Information

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Patent Type & Authority Patents(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