Ultrafine cermet material and preparation method thereof

A cermet and face-centered cubic technology, which is applied in the field of cermet materials, can solve the problems of increasing mismatch degree and reducing the toughness of ceramic body, and achieve the effects of improving ductility, reducing grain boundary fracture, and improving toughness and toughness.

Active Publication Date: 2017-07-25
重庆金锐新材料技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it has been reported that too much Co in the binder phase will increase the mismatch between the metal phase and the hard phase atoms, and reduce the toughness of the ceramic body.

Method used

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  • Ultrafine cermet material and preparation method thereof
  • Ultrafine cermet material and preparation method thereof
  • Ultrafine cermet material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Preparation of (W, Mo, Ta) C solid solution: Weigh 850g of tungsten powder, 420g of molybdenum powder, 420g of tantalum powder and 150g of graphite powder, add 75g of cerium oxide powder, and then put the raw materials into stainless steel together with tungsten carbide balls Carry out high-energy ball milling in a vacuum ball mill tank, the ball-to-material ratio is 10:1, the ball milling speed is 300 rpm, and the ball milling time is 36 hours. Carry out the thermal combination reaction for 60 minutes under the condition to obtain (W, Mo, Ta) C solid solution with an average particle size of about 100nm;

[0035] (2) Preparation of bonded wetting phase: Weigh 170 g of cobalt powder with a face-centered cubic structure of 200 nm, 330 g of (W, Mo, Ta) C solid solution obtained in step (1), 15 g of dispersant (CeO 2 It is mixed with VC at a mass ratio of 3:1, and the average particle size is 200nm), put it into the ball mill cylinder of a planetary ball mill, add 100m...

Embodiment 2

[0043] (1) Preparation of (W, Mo, Ta) C solid solution: Weigh 1050g of tungsten powder, 410g of molybdenum powder, 510g of tantalum powder and 130g of graphite powder, and add 90g of cerium oxide powder, and then put the raw materials into stainless steel together with tungsten carbide balls Carry out high-energy ball milling in a vacuum ball mill tank, the ball-to-material ratio is 6:1, the ball milling speed is 200 rpm, and the ball milling time is 24 hours. Carry out thermal compounding reaction for 120 minutes under the condition to obtain (W, Mo, Ta) C solid solution with an average particle size of about 300nm;

[0044] (2) Preparation of bonded wetting phase: Weigh 200 g of cobalt powder with a face-centered cubic structure of 150 nm, 350 g of (W, Mo, Ta) C solid solution obtained in step (1), 20 g of dispersant (CeO 2 It is mixed with VC at a mass ratio of 3:1, and the average particle size is 200nm), put it into the ball mill cylinder of a planetary ball mill, add 100...

Embodiment 3

[0050] (1) Preparation of (W, Mo, Ta) C solid solution: Weigh 1150g of tungsten powder, 360g of molybdenum powder, 450g of tantalum powder and 140g of graphite powder, add 90g of cerium oxide powder, and then put the raw materials together with tungsten carbide balls into stainless steel Carry out high-energy ball milling in a vacuum ball mill tank, the ball-to-material ratio is 9:1, the ball milling speed is 300 rpm, and the ball milling time is 36 hours. Carry out thermal compound reaction for 90 minutes under the condition to obtain (W, Mo, Ta) C solid solution with an average particle size of about 200nm;

[0051] (2) Preparation of bonded wetting phase: Weigh 190 g of cobalt powder with a face-centered cubic structure of 300 nm, 350 g of (W, Mo, Ta) C solid solution obtained in step (1), 20 g of dispersant (CeO 2 It is mixed with VC at a mass ratio of 3:1, and the average particle size is 200nm), put it into the ball mill barrel of a planetary ball mill, add 150ml of alco...

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Abstract

The invention discloses a superfine metalloceramics material and a preparation method thereof. The superfine metalloceramics material takes Ti (C, N) as a hard phase; Co of a face-centered cubic structure is taken as a binding phase; a (W, Mo, Ta) C solid solution is taken as a wetting phase; and the preparation method of the superfine metalloceramics material comprises the steps of (W, Mo, Ta) C solid solution preparation, binding phase and wetting phase preparation, vacuum ball milling, metalloceramics powder preparation, moulding, low-pressure sintering and the like. The high-density and high-toughness metalloceramics material is prepared in the invention; the hardness of the material can reach HRA 92.9 in average; the bending strength of the material can reach 2200 MPa on average; and the breaking tenacity can reach 12 MPa.m<1 / 2> on average.

Description

technical field [0001] The invention relates to the technical field of cermet materials, in particular to an ultrafine cermet material and a preparation method thereof. Background technique [0002] With the rapid development of aerospace, military, energy, automobile, electronics and other industries, higher requirements are placed on modern manufacturing. Therefore, high-efficiency, high-precision, high-efficiency, and high-reliability processing materials have become an inevitable choice for modern high-end manufacturing. Ti(C,N)-based cermet material is a new type of material developed by combining vanadium and titanium resources. It has the advantages of low density, high temperature performance, wear resistance and low thermal conductivity. It is the best choice for modern tool materials. my country's research and development of Ti(C,N)-based cermet materials has already started, and a complete industrial chain of titanium carbonitrides, cermet materials and tool prod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C29/04C22C1/05
CPCB22F9/026B22F9/04B22F2009/042B22F2009/043B22F2998/10B22F2999/00C22C1/051C22C29/005C22C29/04B22F9/16B22F9/082B22F9/22B22F3/02B22F3/14B22F2201/20
Inventor 邓莹邓玲张艳华姜中涛涂铭旌陈慧敬小龙
Owner 重庆金锐新材料技术研究院有限公司
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