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Preparation method of Al2O3-contained nickel-base bonding phase ultrafine metal ceramic powder

A cermet and ultra-fine powder technology, applied in the field of cermet, can solve the problems of low service life, difficulty in ensuring the strength of ultra-fine cermet finished products, poor quality of ultra-fine cermet finished products, etc., so as to improve powder activity and improve particle distribution. Uniformity, the effect of reducing the activation energy of the reaction

Active Publication Date: 2012-10-10
GEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most domestic enterprises use pure nickel powder with coarser particle size as the binder phase when preparing ultrafine cermet material powder, but it is difficult for the coarser particle size nickel powder (≥1μm) to combine with ultrafine titanium carbide powder, molybdenum powder and The carbon black powder is mixed evenly, which makes it easy to produce nickel pools after sintering of ultrafine cermets, and increases the tendency of cermet grains to aggregate and grow, resulting in poor quality and low service life of ultrafine cermets
In addition, pure nickel powder is used as the binder phase, and the binder phase does not contain dispersion strengthening phase particles, so it is difficult to ensure the strength of the ultrafine cermet product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Prepare TiC-10wt% (Ni-1wt%Al 2 o 3 )-10wt%Mo-0.6wt%C ultrafine cermet powder.

[0019] 400g of nickel oxalate (containing 31wt% nickel) with a Fischer mean particle size of ≤ 3 μm and Al with a Fischer mean particle size of ≤ 1 μm 2 o 3 Put 1.24g of powder into a planetary high-energy ball mill, and after 30 hours of ball milling, put the ball-milled powder into a hydrogen reduction furnace at 480°C and a hydrogen flow rate of 4m 3 / min, 90 minutes, the powder was reduced to obtain a Fischer average particle size of 0.8μm ultrafine Ni-1wt%Al 2 o 3 Powder, used as a binder phase for ultrafine cermets.

[0020] The prepared ultrafine Ni-1wt%Al 2 o 3 100g of powder, 800g of TiC powder, 100g of Mo powder and 6g of carbon black powder with a Fibonacci average particle size of ≤1 μm, and 400ml / kg of absolute ethanol as a ball milling medium, 0.3wt% oleic acid as a dispersant, and 3wt% polyethylene glycol as a forming agent Alcohol together, put into stirring ball mill...

Embodiment 2

[0023] Prepare TiC-10wt% (Ni-1wt%Al 2 o 3 )-10wt%Mo-0.6wt%C ultrafine cermet powder.

[0024] 400g of nickel carbonate (containing 44wt% nickel) with a Fischer mean particle size of ≤ 3 μm and Al with a Fischer mean particle size of ≤ 1 μm 2 o 3 Put 1.76g of powder into a planetary high-energy ball mill, and after 30 hours of ball milling, put the ball-milled powder into a hydrogen reduction furnace at 480°C and a hydrogen flow rate of 4m 3 / min, 90 minutes, the powder was reduced to obtain a Fischer average particle size of 0.8μm ultrafine Ni-1wt%Al 2 o 3 Powder, used as a binder phase for ultrafine cermets.

[0025] The prepared ultrafine Ni-1wt%Al 2 o 3 100g of powder, 800g of TiC powder, 100g of Mo powder and 6g of carbon black powder with a Fibonacci average particle size of ≤1 μm, and 400ml / kg of absolute ethanol as a ball milling medium, 0.3wt% oleic acid as a dispersant, and 3wt% polyethylene glycol as a forming agent Alcohol together, put into stirring ball mi...

Embodiment 3

[0028] Prepare TiC-10wt% (Ni-1wt%Al 2 o 3 )-10wt%Mo-0.6wt%C ultrafine cermet powder.

[0029] 400g of nickel oxalate (containing 31wt% nickel) with a Fischer mean particle size of ≤ 3 μm and Al with a Fischer mean particle size of ≤ 1 μm 2 o 3 Put 1.24g of powder into a planetary high-energy ball mill, and after 30 hours of ball milling, put the ball-milled powder into a hydrogen reduction furnace at 480°C and a hydrogen flow rate of 4m 3 / min, 90 minutes, the powder was reduced to obtain a Fischer average particle size of 0.8μm ultrafine Ni-1wt%Al 2 o 3 Powder, used as a binder phase for ultrafine cermets.

[0030] The prepared ultrafine Ni-1wt%Al 2 o 3100g of powder, 800g of TiC powder, 100g of Mo powder and 6g of carbon black powder with a Fibonacci average particle size of ≤1 μm, and 400ml / kg of absolute ethanol as a ball milling medium, 0.3wt% oleic acid as a dispersant, and 3wt% polyethylene glycol as a forming agent Alcohol together, put into stirring ball mill,...

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Abstract

The invention provides Al2O3-contained nickel-base bonding phase ultrafine metal ceramic powder as well as a preparation method thereof. The preparation method comprises the following steps of: firstly preparing Al2O3-contained nickel-base bonding phase ultrafine powder by using a planetary high-energy ball milling and deoxidization process; and then placing the obtained Al2O3-contained nickel-base bonding phase ultrafine powder together with hard phase TiC powder, Mo powder, carbon black powder, dispersing agent, forming agent, ball milling medium and the like into a stirring ball mill, and carrying out stirring ball milling for a while to obtain the Al2O3-contained nickel-base bonding phase ultrafine metal ceramic powder. The preparation method has the advantages of simple process and low cost and reduces nickel ponds easily generated by sintering the traditional nickel-contained powder materials and the trend of aggregation and growth of ceramic crystalline grains, and the Al2O3-contained nickel-base bonding phase ultrafine metal ceramic powder has favorable wear resistance, hardness, strength and fracture toughness. The ultrafine powder can be used for preparing high-quality ultrafine metal ceramic materials.

Description

technical field [0001] The invention relates to the field of cermets, in particular to an Al-containing 2 o 3 A method for preparing nickel-based binder phase ultrafine cermet powder. Background technique [0002] TiC-based cermet materials, because of their low cost of raw materials and excellent performance, are widely used in cutting tools, molds, wear-resistant parts, etc., and are ideal materials to replace certain grades of cemented carbide. Due to the high brittleness, low strength and short service life of TiC-based cermet materials, the wider application of TiC-based cermet materials is limited. [0003] Ultrafine cermet materials have excellent comprehensive properties, and are an important direction for the research and development of cermet materials at home and abroad. The preparation of ultra-fine cermet materials must use high-quality ultra-fine cermet material powders. At present, most domestic enterprises use pure nickel powder with coarser particle size...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05B22F9/04B22F1/00
Inventor 刘沙许开华
Owner GEM CO LTD
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