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A kind of preparation method of the regenerated wc-co cemented carbide containing rare earth

A cemented carbide and rare earth technology, which is applied in the field of powder metallurgy preparation of cemented carbide, can solve the problems of inclusion, reduce the quality of recycled cemented carbide, performance and stability, and achieve low cost, stable guarantee, and simple and easy process. row effect

Active Publication Date: 2015-08-26
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to reduce the quality of regenerated cemented carbide for the zinc, iron, sulfur, calcium, manganese, titanium and other impurities remaining in the alloy to cause defects such as pores and inclusions in the above-mentioned zinc melting cemented carbide reclaimed material. Problems with performance and stability, provide a preparation method of rare earth-containing recycled WC-Co cemented carbide that can effectively reduce the damage of impurities to the alloy and improve the performance of the alloy.

Method used

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  • A kind of preparation method of the regenerated wc-co cemented carbide containing rare earth
  • A kind of preparation method of the regenerated wc-co cemented carbide containing rare earth
  • A kind of preparation method of the regenerated wc-co cemented carbide containing rare earth

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Embodiment 1

[0028] The preparation method of the regenerated WC-8Co cemented carbide containing rare earth yttrium, the method comprises the following steps:

[0029] (1) Put the WC-8Co reclaimed material of zinc melting method with a Fischer particle size of 1.8 μm on a 120-mesh sieve for sieving treatment; take the sieved material as a raw material to remove large-sized impurities.

[0030] (2) nanometer yttrium oxide (Y 2 o 3 ) is placed in an absolute ethanol medium of 20 times the weight volume for ultrasonic dispersion, the ultrasonic power is 700 watts, and the ultrasonic time is 40 minutes.

[0031] (3) The mass of WC powder accounts for 92% of the mass of regenerated WC-Co cemented carbide, the mass of cobalt powder accounts for 8% of the mass of regeneration, and the rare earth additive Y 2 o 3 The quality of the rare earth element yttrium (Y) in the medium is 1.1% of the cobalt powder quality (the cobalt binder phase quality in the regenerated WC-Co cemented carbide) for bat...

Embodiment 2

[0040] A method for preparing a recycled WC-6Co cemented carbide containing rare earth cerium, the method comprising the steps of:

[0041] (1) Put the WC-6Co reclaimed material of zinc melting method with a Fischer particle size of 1.4 μm on a 200-mesh vibrating screen for sieving treatment; take the sieved material as raw material to remove large-sized impurities.

[0042] (2) Nano rare earth cerium oxide (CeO 2 ) is placed in an absolute ethanol medium of 10 times the weight volume for ultrasonic dispersion, the ultrasonic power is 1500 watts, and the ultrasonic time is 10 minutes.

[0043] (3) The mass of WC powder accounts for 94% of the mass of regenerated WC-Co cemented carbide, the mass of cobalt powder accounts for 6% of the mass of regeneration, and the rare earth additive CeO 2 The quality of the rare earth element cerium (Ce) in the medium is 1.5% of the cobalt powder mass (the cobalt binder phase mass in the regenerated WC-Co cemented carbide) and placed in the b...

Embodiment 3

[0047] A method for preparing a regenerated WC-12Co cemented carbide containing rare earth lanthanum, the method comprising the steps of:

[0048] (1) Put WC-12Co recycled zinc melt with a Fischer particle size of 2.2 μm on an 80-mesh vibrating sieve for sieving treatment; take the undersieve as raw material to remove large-sized impurities.

[0049] (2) Nano rare earth lanthanum oxide (La 2 o 3 ) placed in an anhydrous ethanol medium of 50 times the weight volume for ultrasonic dispersion, the ultrasonic power is 300 watts, and the ultrasonic time is 60 minutes.

[0050] (3) The quality of WC powder accounts for 88% of the recycled WC-Co cemented carbide, the quality of cobalt powder accounts for 12% of the recycled alloy, and the rare earth additive La 2 o 3 The mass of medium rare earth element La is 0.3% of the mass of cobalt powder (mass of cobalt binder phase in regenerated WC-Co cemented carbide) and placed in a ball mill cylinder after batching; absolute ethanol is ...

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Abstract

The invention discloses a preparation method of a rare-earth-containing regenerated WC-Co hard alloy, which comprises the following steps: (1) screening a reclaimed material WC-Co mixture powder reclaimed from waste hard alloy, wherein the WC-Co mixture powder comprises 84-94 wt% of WC powder and 6-16 wt% of Co powder; (2) carrying out ultrasonic dispersion one or more nano rare-earth oxides, wherein the rare earth accounts for 0.2-2 wt% of the rare-earth oxides; and (3) mixing the screened WC-Co mixture powder and dispersed nano rare-earth oxides, carrying out wet milling, filtering, drying, doping a forming agent, granulating, carrying out press forming, sintering, and carrying out furnace cooling to obtain the rare-earth-containing regenerated WC-Co hard alloy. The invention has the characteristics of low cost, simple and feasible technique, no special requirements for alloy production equipment, and stably enhanced alloy properties; and the invention enhances the strength and toughness of the alloy, and the service performance of the alloy can reach the level of primary WC-Co hard alloy with the same designation.

Description

technical field [0001] The invention relates to a preparation method of rare earth-containing regenerated WC-Co cemented carbide, which belongs to the technical field of powder metallurgy preparation of cemented carbide. Background technique [0002] As cemented carbide with excellent comprehensive performance is widely used in cutting tools, molds, mining tools, construction engineering tools, precision machining, wear resistance and corrosion resistance, etc., the number of used cemented carbide waste products has also increased significantly. Increase. How to effectively solve the problem of high-quality recycling of waste cemented carbide, and use the recycled materials of waste cemented carbide to prepare properties close to or reach the performance of original cemented carbide products, conform to the development trend of green circular economy, has great social and economic significance benefit and long-term sustainable development value. [0003] Due to its low ene...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/04C22C29/08
Inventor 林晨光林中坤曹瑞军
Owner GRIMAT ENG INST CO LTD