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WCoB ternary boride cermet material and preparation method thereof

A ternary boride and cermet technology, applied in the field of metal-ceramic composite materials, can solve the problems of wear resistance and high temperature resistance that cannot meet service conditions, achieve excellent high temperature resistance, reduce product cost, and excellent high temperature resistance. Effect

Inactive Publication Date: 2010-05-05
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the material has excellent properties such as high hardness, high strength, low density, and a thermal expansion coefficient similar to steel, its wear resistance and high temperature resistance cannot meet higher service conditions.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A WCoB ternary boride cermet material and its preparation method: 25-30wt% titanium diboride powder, 20-30wt% tungsten carbide powder and 42-53wt% cobalt powder are used as mixture; The mass ratio of the alloy balls to the mixture is (4-5): 1. Add cemented carbide balls and the mixture to the ball mill, and then add absolute ethanol. The liquid level of the absolute ethanol is higher than that of the cemented carbide balls and the mixture. The layer is 5-30mm; it is wet-milled by ball mill for 10-15 hours, and then 2-5wt% of liquid paraffin is added to the mixture, mixed in the ball mill for 1-5 hours, and the mixture after ball milling is dried to constant weight, passed through 20-200 mesh The required powder is obtained by sieving; after the powder is compacted and sintered at 1250-1300° C. for 6-10 hours, the WCoB ternary boride cermet material is obtained.

Embodiment 2

[0014] A WCoB ternary boride cermet material and its preparation method: use 23-26wt% titanium diboride powder, 64-66wt% tungsten carbide powder and 10-13wt% cobalt powder as the mixture; The mass ratio of the mixed material to the mixed material is (5-6): 1. Add steel balls and mixed material to the ball mill, and then add gasoline. The liquid level of the gasoline is 5-30mm higher than the steel ball and mixed material layer; ~ 20 hours, then add 5 ~ 8wt% zinc stearate of the mixture, mix in a ball mill for 5 ~ 8 hours, dry the mixture after ball milling to the constant weight, and pass through a 20 ~ 200 mesh sieve to obtain the required powder; powder pressing After molding, sinter at 1300-1350°C for 5-8 hours to obtain WCoB ternary boride cermet material.

Embodiment 3

[0016] A WCoB ternary boride cermet material and its preparation method: use 21-23wt% titanium diboride powder, 58-64wt% tungsten carbide powder and 13-21wt% cobalt powder as the mixture; The mass ratio to the mixture is (6~7): 1, add corundum balls and mixture in the ball mill, then add dehydrated alcohol, the liquid level of dehydrated alcohol is 5~30mm higher than the corundum ball and mixture layer; Wet milling in a ball mill for 20 to 30 hours, then adding 8 to 10 wt% of liquid paraffin to the mixture, mixing in the ball mill for 8 to 10 hours, drying the mixture after ball milling to a constant weight, and passing through a 20 to 200 mesh sieve to obtain the desired powder; After the powder is compacted and sintered at 1350-1400° C. for 3.5-6 hours, the WCoB ternary boride cermet material is obtained.

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Abstract

The invention particularly relates to a WCoB ternary boride cermet material and a preparation method thereof. The adopted technical scheme is as follows: taking 5-30wt% of titanium diboride powder, 20-70wt% of tungsten carbide powder and 10-60wt% of cobalt powder as a mixing material; adding grinding ball and the mixing material into a ball mill, wherein, the mass ratio of the grinding ball to the mixing material is 4-10:1; then adding a grinding ball medium, and the liquid level of the grinding ball medium is 5-30mm higher than the layer of grinding ball and the mixing material; wetly milling for 10-100h by the ball mill; adding forming agent which accounts for 2-15wt% of the mixing material; mixing for 1-30h in the ball mill; granulating to obtain required powder; pressing the powder and sintering for 1-10h at the temperature of 1250-1500 DEG C to obtain the WCoB ternary boride cermet material. The WCoB ternary boride cermet material prepared by the method in the invention has low cost, simple process, higher abrasive resistance and high temperature resistant performance, and can satisfy higher service conditions.

Description

technical field [0001] The invention belongs to the technical field of metal-ceramic composite materials. Specifically relates to a WCoB ternary boride cermet material and a preparation method thereof. Background technique [0002] Cemented carbide is a cermet material obtained by powder metallurgy from refractory metal compounds and bonding metals. At present, the commonly used refractory metal compounds are mainly tungsten carbide (WC) and titanium carbide (TiC), and the binder metals are generally transition group elements such as cobalt (Co), nickel (Ni), and iron (Fe). Cemented carbide was originally mainly used in the manufacture of wire drawing dies and other wear-resistant parts. Later, due to its continuous improvement in performance, it has been widely used in the field of metal cutting. Because cemented carbide has a series of advantages such as high hardness, high strength, high wear resistance, strong corrosion resistance and low thermal expansion coefficient,...

Claims

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Application Information

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IPC IPC(8): C22C29/14C22C1/05
Inventor 潘应君徐明
Owner WUHAN UNIV OF SCI & TECH
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