Preparation method of prealloying powder

A technology for pre-alloyed powder and powder, applied in the field of pre-alloyed powder preparation, can solve the problem of high production cost, achieve the effects of high production efficiency, improved thermal efficiency, and no component segregation

Inactive Publication Date: 2012-09-19
GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The chemical precipitation method is to use oxalic acid, ammonium bicarbonate and other precipitants to precipitate the salt solution of various metals, and then prepare pre-alloyed powder by dehydration, drying, reduction and other processes. The pre-alloyed powder prepared by this method has a fine particle size, High sintering activity and other advantages, but high production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Mix iron powder and copper powder in a ratio of 96:4 (mass ratio), mix them in a three-dimensional mixer for 30 minutes, and then put them into a In the glass tube, add at the other end The red copper electrode is used, and nitrogen gas is passed into the tube for 5 minutes, and the direct current of 200A is connected. It only takes 4.5 seconds to complete, and then crushed and sieved to prepare pre-alloyed powder.

Embodiment 2

[0015] Mix iron powder and copper powder in a ratio of 85:15 (mass ratio), mix them in a three-dimensional mixer for 30 minutes, and then put them into a ceramic tube, add at the other end It only takes 4.8 seconds to complete the red copper electrode with 350A alternating current, and then it is crushed and sieved to prepare pre-alloyed powder.

Embodiment 3

[0017] Mix iron powder, copper powder, and tin powder in a ratio of 75:15:10 (mass ratio), mix them in a three-dimensional mixer for 30 minutes, and then put them into a box with a copper electrode at one end. ceramic tube, add at the other end It takes only 4.3 seconds for the red copper electrode to be connected to 450A alternating current, and then crushed and sieved to prepare pre-alloyed powder.

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PUM

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Abstract

The invention discloses a preparation method of prealloying powder, which belongs to the technical field of prealloying power preparation. The method comprises the following steps of: uniformly mixing powder comprising two or more than two components; applying a current; taking powder as a heating element, and heating the powder; bonding the powder with different components; preparing to be massive prealloying power; crushing and sieving; and preparing to be the prealloying powder. According to the method, the powder is used as a heating element to be heated directly, so that the heat efficiency is greatly improved, compared with a high temperature furnace, the diffusion technology is reduced by 5-70 percent, and the production efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of prealloyed powder preparation, in particular to a method for preparing prealloyed powder. Background technique [0002] Traditional pre-alloyed powder production methods mainly include atomization method, diffusion method, bonding method, chemical precipitation method and so on. The atomization method is to melt various component metals, and then atomize them with gas or liquid to prepare pre-alloyed powders. The pre-alloyed powders produced by this method have high alloying degree, high hardness and poor formability. Diffusion method is to mix metals or non-metals of various components evenly, then put them into a high-temperature furnace, and carry out diffusion treatment under a protective or reducing atmosphere, so that powders of different components can be diffused to prepare pre-alloyed powders. Pre-alloyed powder has the advantages of low alloying degree and good formability, but it has higher en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/04
Inventor 王林山汪礼敏刘宇慧张景怀穆艳如
Owner GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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