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Production line for low-oxygen-content hard alloy mixture and production technology thereof

A technology of cemented carbide and low oxygen content, which is applied in the field of powder metallurgy to prepare cemented carbide to achieve the effect of improving stability and controllability and avoiding oxidation

Inactive Publication Date: 2014-09-24
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lead to high oxygen content and unstable quality of final WC
When used to prepare cemented carbide, the amount of carbon is not easy to control, resulting in the appearance of graphite phase or carbon-poor phase in the final alloy, and the performance of cemented carbide decreases

Method used

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  • Production line for low-oxygen-content hard alloy mixture and production technology thereof
  • Production line for low-oxygen-content hard alloy mixture and production technology thereof

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Experimental program
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Embodiment Construction

[0023] The production line of the present invention will be described in detail below in conjunction with the accompanying drawings. figure 1 It is a schematic diagram of the production line of the nano-hard alloy mixture of the present invention.

[0024] like Figure 1-2 As shown, this method invents a production line of a low-oxygen cemented carbide mixture, which is composed of a reduction part for preparing blue tungsten powder, a reduction part for preparing tungsten powder, a carbonization part and a granulation part to form a closed system;

[0025] Wherein, the blue tungsten powder reduction part includes a first transition chamber 1, a rotary reduction furnace 2, a second transition chamber 3, a first glove box 4, a first closed bucket 6, a third transition chamber 5 and a first ball mill 7 ; The first transition chamber 1, the rotary reduction furnace 2, the second transition chamber 3, the first glove box 4 and the third transition chamber 5 are sequentially seal...

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Abstract

The invention relates to a production line for low-oxygen-content hard alloy mixture. The production line is a sealed system formed by a reduction part used for preparing blue tungsten powder, a reduction part used for preparing tungsten powder, a carbonization part and a pelletizing part. According to the production line disclosed by the invention, nanometer tungsten trioxide is still in the sealed production line from the rotary reduction furnace inlet of a starting end to the spraying drying tower of a tail end; the sealed production line is filled with nitrogen or hydrogen, so that nanometer powder is prevented from contacting with external air all the time so as to reduce the size of nanometer WC (wolfram carbide) particles and prevent nanometer WC from being oxidized and auto-ignited; the oxygen content of the hard alloy mixture is lowered; the stability and the controllability of the ultra-fine grain hard alloy quality are improved; the combination property of the alloy is improved.

Description

field of invention [0001] The invention relates to a production line of a low-oxygen-content nano-tungsten carbide mixture and a production process thereof, and belongs to the field of cemented carbide prepared by powder metallurgy. Background of the invention [0002] Cemented carbide is sintered with WC as the hard phase and Co as the binder phase through high-temperature liquid phase sintering. Cemented carbide has high hardness, high strength and high wear resistance. Its appearance has revolutionized machining and is known as "the tooth of industry". [0003] Modern industry has higher and higher requirements for the comprehensive performance of cemented carbide cutting tools, tools and molds, and wear-resistant parts, mainly reflected in: 1) The comprehensive promotion of high-efficiency and high-precision CNC machine tools has put forward higher requirements for tool life and cutting efficiency ; 2) The performance of the processed material is improving day by day,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/04
Inventor 林涛王志张深根邵慧萍何新波
Owner UNIV OF SCI & TECH BEIJING
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