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Metal ceramic particle and preparation method and application

A technology of cermets and particles, applied in the field of 3D printing, can solve the problems that the wear resistance and fracture toughness cannot be improved at the same time, and achieve the effect of improving wear resistance and strength

Inactive Publication Date: 2016-12-14
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a cermet particle and its preparation method application, which is used to solve the technical defect that the cermet particle cannot simultaneously improve wear resistance and fracture toughness in the prior art

Method used

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  • Metal ceramic particle and preparation method and application
  • Metal ceramic particle and preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This embodiment is a specific embodiment for preparing product 1.

[0034] In product 1, the volume ratio of cermet particle wear-resistant phase-transition phase-toughening matrix phase is 65:20:30

[0035] 1) Prepared multi-level composite cermet particles.

[0036] Prepare the wear-resistant phase according to the following method:

[0037] WC-4wt.% Co and 2wt.% paraffin were mixed to obtain a mixture; the mixture was wet-milled at a ball milling speed of 200r / min for 48 hours, dried at 60°C, sieved, and granulated; the obtained balls were The pellets were dewaxed in hydrogen at 400°C for 2 hours, and then sintered at 1500°C under vacuum to obtain wear-resistant phase 1. In the embodiment of the present invention, the particle size of WC in the prepared wear-resistant phase 1 is 100 nm. The particle size of wear-resistant phase is 40um.

[0038] Prepare wear-resistant phase-transition phase composite powder according to the following method:

[0039] Mix 59 gram...

Embodiment 2

[0048] This embodiment is a specific embodiment for preparing product 2.

[0049] 1) Prepare multi-level composite cermet particles with a volume ratio of wear-resistant phase-transition phase-toughening matrix phase: 60:15:38.

[0050] Prepare the wear-resistant phase according to the following method:

[0051]4wt.% Co, 96wt.% WC and 2wt.% paraffin were mixed to obtain a mixture; the mixture was wet-milled at a ball milling speed of 200r / min for 48 hours, dried at 60°C, sieved, and granulated; The obtained pellets were dewaxed in hydrogen at 400°C for 2 hours, and then sintered at 1500°C under vacuum to obtain a wear-resistant phase. The particle size of WC in the wear-resistant phase prepared in Example 2 of the present invention is 100nm, the composition is 97wt.%WC-3wt.%Co, and the particle size of the wear-resistant phase is 40um.

[0052] Prepare wear-resistant phase-transition phase composite powder according to the following method:

[0053] 60 grams of the above we...

Embodiment 3

[0061] This embodiment is a specific embodiment for preparing product 3.

[0062] 1) Prepare multi-level composite cermet particles with a volume ratio of wear-resistant phase-transition phase-toughening matrix phase: 70:25:24.

[0063] Prepare the wear-resistant phase according to the following method:

[0064] 4wt.% Co, 96wt.% WC and 2wt.% paraffin and n-heptane were mixed to obtain a mixture; the mixture was wet-milled at a ball milling speed of 200r / min for 48 hours, dried at 60°C, sieved, Granulation: Dewaxing the obtained pellets in hydrogen at 400°C for 2 hours, and then sintering at 1500°C under vacuum to obtain a wear-resistant phase. The particle size of WC in the wear-resistant phase prepared in Example 2 of the present invention is 100nm, the composition is 96wt.%WC-4wt.%Co, and the particle size of the wear-resistant phase is 40um.

[0065] Prepare wear-resistant phase-transition phase composite powder according to the following method:

[0066] 64 grams of the...

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Abstract

The invention belongs to the technical field of 3D printing, in particular to a metal ceramic particle and a preparation method and application. The metal ceramic particle sequentially comprises an abrasion-resistant phase, a transition phase and a toughening matrix phase from a center layer to the surface layer, wherein the abrasion-resistant phase is WC or WC-Co alloy. The invention further provides the preparation method of the metal ceramic particle. The invention further provides application of the metal ceramic particle or products obtained through the preparation method. Fracture toughness and abrasion resistance of the products prepared through the technical scheme can meet application requirements of cutter cutting, mineral exploitation, shield tools and petroleum drilling. Meanwhile, by means of the metal ceramic particle, abrasion resistance and fracture toughness of metal ceramic can be improved at the same time. The technical defects that in the prior art, metal ceramic products cannot be manufactured into complex shapes easily, and abrasion resistance and fracture toughness cannot be improved at the same time are overcome.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and in particular relates to a cermet particle 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 cermets is that the wear resistance and fracture toughness cannot be improved at the same time. The cermets in the prior art, while improving their wear resistance, their fracture toughness will decrease, 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 life of rock drilling tools. [0003] In the prior art...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F9/04C22C29/08
CPCB22F1/0003B22F9/04B22F2009/043C22C29/067C22C29/08
Inventor 邓欣陈健刘金洋伍尚华
Owner GUANGDONG UNIV OF TECH