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Composite metal ceramic and preparation method and application thereof

A composite metal and cermet technology, applied in the field of 3D printing, can solve the problems of difficult preparation of products with complex shapes, failure to improve wear resistance and fracture toughness at the same time, and achieve the effect of improving wear resistance and strength

Inactive Publication Date: 2017-01-04
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the present invention provides a composite cermet and its preparation method and application, which are used to solve the problems in the prior art that conventional cermets are difficult to prepare products with complex shapes, and cannot simultaneously improve wear resistance and fracture toughness. technical flaw

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  • Composite metal ceramic and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0031] This embodiment is a specific embodiment for preparing product 1.

[0032] 1) Prepare multi-level composite cermet particles with a volume ratio of wear-resistant phase-transition phase-toughening matrix phase: 65:20:30.

[0033] a) Prepare the wear-resistant phase according to the following method:

[0034] 10wt.% Ni, 80wt.% TiC, 10wt.% Mo 2 C and 2wt.% paraffin wax are mixed to obtain a mixture; the mixture is sequentially subjected to wet grinding, dry granulation, sieving, dewaxing and sintering to obtain wear-resistant phase aggregates. The ball milling speed of the wet milling is preferably 200 r / min, the wet milling time is 48 hours, and the drying and granulation temperature is 60°C. The dewaxing is carried out in hydrogen, the dewaxing temperature is 400°C, the dewaxing time is 2 hours, the sintering is carried out in vacuum, and the sintering temperature is 1400°C. The particle size of the wear-resistant phase prepared in this example is 40 μm, and the comp...

Embodiment 2

[0044] This embodiment is a specific embodiment for preparing product 2.

[0045] 1) Prepare multi-level composite cermet particles with a volume ratio of wear-resistant phase-transition phase-toughening matrix phase: 60:15:38.

[0046] a) Prepare the wear-resistant phase according to the following method:

[0047] 10wt.% Ni, 80wt.% TiC, 10wt.% Mo 2C and 2wt.% paraffin wax are mixed to obtain a mixture; the mixture is sequentially subjected to wet grinding, dry granulation, sieving, dewaxing and sintering to obtain wear-resistant phase aggregates. The ball milling speed of the wet milling is preferably 200 r / min, the wet milling time is 48 hours, and the drying and granulation temperature is 60°C. The dewaxing is carried out in hydrogen, the dewaxing temperature is 400°C, the dewaxing time is 2 hours, the sintering is carried out in vacuum, and the sintering temperature is 1400°C. The particle size of the wear-resistant phase prepared in this example is 50 μm, and the compo...

Embodiment 3

[0057] This embodiment is a specific embodiment for preparing product 3.

[0058] 1) Prepare multi-level composite cermet particles with a volume ratio of wear-resistant phase-transition phase-toughening matrix phase: 70:25:24.

[0059] a) Prepare the wear-resistant phase according to the following method:

[0060] 10wt.% Ni, 80wt.% TiC, 10wt.% Mo 2 C and 2wt.% paraffin wax are mixed to obtain a mixture; the mixture is sequentially subjected to wet grinding, dry granulation, sieving, dewaxing and sintering to obtain wear-resistant phase aggregates. The ball milling speed of the wet milling was 200r / min, the wet milling time was 48 hours, and the drying and granulation temperature was 60°C. The dewaxing is carried out in hydrogen, the dewaxing temperature is 400°C, the dewaxing time is 2 hours, the sintering is carried out in vacuum, and the sintering temperature is 1400°C. The particle size of the wear-resistant phase prepared in this example is 60 μm, and the composition i...

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Abstract

The invention belongs to the technical field of 3D printing, and particularly relates to composite metal ceramic and a preparation method and application thereof. A composite metal ceramic particle is provided, and the composite metal ceramic particle sequentially comprises an abrasion-resistant phase, a transition phase and a toughening matrix phase from the center layer to the surface layer. The abrasion-resistant phase is TiC-Ni-Mo2C alloy. The invention further provides the preparation method of the composite metal ceramic. The invention further provides the application of the composite metal ceramic or a product obtained through the preparation method. According to the technical scheme, strength of the obtained product can meet the application requirements of tool cutting, mineral exploitation, shielding tools and petroleum drilling. Meanwhile, according to the composite metal ceramic, the abrasion resistance and fracture toughness of the metal ceramic can be improved at the same time. The technical defects that products of the complicated shapes cannot be prepared easily through conventional metal ceramic in the prior art, and the abrasion resistance and fracture toughness cannot be improved simultaneously are overcome.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and in particular relates to a composite metal ceramic and its preparation method and application. Background technique [0002] As a special tool material, superhard alloy cermet has been widely used in tool cutting, mineral development, infrastructure (shield tools) and oil drilling and other fields. In these applications, the biggest challenge encountered by cemented carbide and cermets is that they cannot improve both wear resistance and fracture toughness at the same time. For traditional cemented carbides and cermets, while improving their wear resistance, their fracture toughness will increase. lower, and vice versa. At present, the cemented carbide in the field of shield tunneling is mainly the traditional uniform microstructure cemented carbide with coarse grains. Although the fracture toughness is high, the wear resistance is very low, which has become the root cause of the short l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F3/105B22F5/00B33Y10/00B33Y70/00B33Y80/00
CPCB22F1/0003B22F5/00B33Y10/00B33Y70/00B33Y80/00B22F2005/001B22F10/00B22F10/28B22F10/366B22F10/32Y02P10/25
Inventor 邓欣陈健刘金洋伍尚华
Owner GUANGDONG UNIV OF TECH
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