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Preparation method of Ti nano particle enhanced TiC-Ni series metal ceramic

A nanoparticle and cermet technology is applied in the field of preparation of Ti nanoparticle-enhanced TiC-Ni series cermet, which can solve the problems of high preparation cost, environmental pollution, and high toxicity of Co, and achieves simple preparation process, high sintering rate, Strength-enhancing effect

Active Publication Date: 2017-10-27
合肥中航纳米技术发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since Co is more expensive than Ni, the preparation cost of the material is high, and Co is highly toxic. During the use of the tool, the Co lost due to continuous wear and tear may pollute the environment.

Method used

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  • Preparation method of Ti nano particle enhanced TiC-Ni series metal ceramic
  • Preparation method of Ti nano particle enhanced TiC-Ni series metal ceramic
  • Preparation method of Ti nano particle enhanced TiC-Ni series metal ceramic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: Preparation, phase analysis and microstructure observation of Ti nanoparticle-reinforced TiC-Ni cermet

[0024] ①. Ultrasonic disperse Ti nano-powder in absolute ethanol for about 30 minutes, then add TiC and Ni micro-powder into the above dispersion system, and then ultrasonically disperse for about 20 minutes. The weight percentages of Ti nano powder and Ni micro powder in the powder are 10% and 10% respectively, and the particle size of Ti nano powder is 60-100nm.

[0025] ②. Transfer the above dispersed powder and ethanol into the PTFE ball mill tank, and add WC-Co cemented carbide grinding balls, the weight ratio between WC-Co cemented carbide grinding balls and powder It is 0.35:1. Afterwards, it is placed on a ball mill for ball milling and mixing for 30 minutes, and finally, the mixed powder is filtered out and dried to obtain a dry mixed powder.

[0026] ③. Add gasoline rubber sol to the dry mixed powder, grind and granulate; the solubility of gaso...

Embodiment 2

[0033] ①. Ultrasonic disperse Ti nano powder in absolute ethanol for about 30 minutes, then add TiC and Ni micro powder into the above dispersion system, and then ultrasonic disperse for about 20 minutes; Ti nano powder and Ni micro powder account for The weight percentage of Ti nanometer powder is 5% and 15% successively, and the particle size of Ti nano powder is 60-100nm.

[0034] ②. Transfer the above dispersed powder and ethanol into the PTFE ball mill tank, and add WC-Co cemented carbide grinding balls, the weight ratio between WC-Co cemented carbide grinding balls and powder It is 0.2:1. Afterwards, it was placed on a ball mill for ball milling and mixing for 40 minutes, and finally, the mixed powder was filtered out and dried to obtain a dry mixed powder.

[0035] ③. Add gasoline rubber sol to the dry mixed powder, grind and granulate; the solubility of gasoline rubber sol is 0.05g / mL, and the addition amount per 100g of powder is 10mL.

[0036] ④. Weigh a certain am...

Embodiment 3

[0039] ①. Ultrasonic disperse Ti nano powder in absolute ethanol for about 30 minutes, then add TiC and Ni micro powder into the above dispersion system, and then ultrasonic disperse for about 20 minutes; Ti nano powder and Ni micro powder account for The weight percentage of Ti nano powder is 15% and 5% in turn, and the particle size of Ti nano powder is 60-100nm.

[0040] ②. Transfer the above dispersed powder and ethanol into the PTFE ball mill tank, and add WC-Co cemented carbide grinding balls, the weight ratio between WC-Co cemented carbide grinding balls and powder It is 0.5:1. Afterwards, it was placed on a ball mill for ball milling and mixing for 50 minutes, and finally, the mixed powder was filtered out and dried to obtain a dry mixed powder.

[0041] ③. Add gasoline rubber sol to the dry mixed powder, grind and granulate; the solubility of gasoline rubber sol is 0.5g / mL, and the amount added per 100g of powder is 5mL.

[0042] ④. Weigh a certain amount of granula...

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Abstract

The invention discloses a preparation method of Ti nano particle enhanced TiC-Ni series metal ceramic, and relates to the technical field of preparation of the metal ceramic by using nano modification and laser sintering technologies. The preparation method comprises the following steps: ultrasonically dispersing a Ti nano powder in anhydrous ethanol, and then adding a TiC and Ni micron powder for ultrasonic dispersion; transferring the powder into a polytetrafluoroethylene ball grinding tank together, adding a WC-Co hard alloy grinding ball for ball grinding, and performing mixing and drying; adding gasoline rubber sol into the mixed powder for grinding and granulating treatment; adding the mixed powder into a mold, and performing sample pressing and forming treatment under a press; placing a pressed green body on the surface of a graphite matrix with a layer of Al2O3 powder for laser sintering. According to the preparation method, added Ti nano particles are fused into a binding phase Ni, so that the intensity of the metal binding phase Ni is enhanced; therefore, the bending strength and the breakage toughness of the TiC-Ni series metal ceramic are enhanced, and a high-performance metal ceramic tool is possibly prepared.

Description

technical field [0001] The invention relates to the technical field of preparing cermets by nano-modification and laser sintering technology, in particular to a preparation method of Ti nanoparticle reinforced TiC-Ni series cermets. Background technique [0002] TiC-Ni cermets have the characteristics of high wear resistance, good chemical stability and good thermal conductivity, and are widely used in machining and molds. However, it is difficult to obtain high-strength TiC-Ni cermets by sintering due to the poor wettability of the binder phase Ni to TiC. At present, there are several commonly used methods to improve the strength of TiC-Ni cermets. First, using WC and Mo 2 C and other high melting point compounds and TiC undergo solid solution reaction during high-temperature liquid phase sintering, forming a layer of (Ti, W, Mo, V, Ta,...) C solid solution around the TiC grains, which can improve Bonding strength between TiC grains and Ni. However, the cermet grains ob...

Claims

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Application Information

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IPC IPC(8): C22C1/05C22C1/10C22C29/10
CPCC22C1/051C22C29/067C22C29/10
Inventor 韩成良阳杰黄俊俊谢劲松赵娣芳
Owner 合肥中航纳米技术发展有限公司