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Fe, W and C ternary phase carbide Fe3W3C and preparation method thereof

A technology of carbide and nano-carbon powder, which is applied in the field of material processing, can solve the problems of C single-phase performance and lack of preparation, and achieve the effect of solving the problem of low-temperature synthesis of ternary carbides, increasing density, and improving reaction characteristics

Inactive Publication Date: 2014-05-28
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And currently for Fe 3 W 3 The performance and preparation of C single-phase are very lacking.

Method used

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  • Fe, W and C ternary phase carbide Fe3W3C and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1) Take the reduced iron powder with a purity of 99% and a particle size of less than 150 μm, the W powder with a purity of 99.9% and a particle size of less than 150 μm, and the nano-carbon powder with a purity of 99.9% and a particle size of less than 150 μm according to reduced iron powder: W powder: nano-carbon powder = The chemical atomic ratio of 3:3:1 is formulated into Fe-W-C mixed powder;

[0029] 2) After adding Fe-W-C mixed powder and WC or stainless steel balls into the ball milling tank, after evacuating the ball milling tank, argon gas is introduced into the ball milling tank, and placed on a QM-3SP4 planetary ball mill under the protection of argon gas for ball milling. The ball milling time is 30 hours. The diameter of the grinding ball is 7mm, the mass ratio of the grinding ball to the Fe-W-C mixed powder is 9:1, and the speed of the ball mill is 500r / min;

[0030] After ball milling, due to the smaller powder particle size, the surface energy of the po...

Embodiment 2

[0035] 1) Take the reduced iron powder with a purity of 99% and a particle size of less than 150 μm, the W powder with a purity of 99.9% and a particle size of less than 150 μm, and the nano carbon powder with a purity of 99.9% and a particle size of less than 150 μm according to the reduced iron powder: W powder: nano carbon powder = The stoichiometric ratio of 3:3:2 is formulated into Fe-W-C mixed powder;

[0036] 2) After adding Fe-W-C mixed powder and WC or stainless steel balls into the ball milling tank, the ball milling tank is evacuated and then filled with argon gas, and placed in a QM-3SP4 planetary ball mill under the protection of argon gas for ball milling, the ball milling time is 50h, The diameter of the grinding ball is 10mm, the mass ratio of the grinding ball to the Fe-W-C mixed powder is 10:1, and the speed of the ball mill is 400r / min;

[0037]After ball milling, due to the smaller powder particle size, the surface energy of the powder increases sharply, an...

Embodiment 3

[0042] 1) Take the reduced iron powder with a purity of 99% and a particle size of less than 150 μm, the W powder with a purity of 99.9% and a particle size of less than 150 μm, and the nano-carbon powder with a purity of 99.9% and a particle size of less than 150 μm according to reduced iron powder: W powder: nano-carbon powder = The stoichiometric ratio of 3.5:4:1.5 is formulated into Fe-W-C mixed powder;

[0043] 2) After adding Fe-W-C mixed powder and WC or stainless steel balls into the ball milling tank, the ball milling tank is vacuumed and then filled with argon gas, and placed in a QM-3SP4 planetary ball mill under the protection of argon gas for ball milling. The ball milling time is 40h. The diameter of the grinding ball is 8mm, the mass ratio of the grinding ball to the Fe-W-C mixed powder is 8:1, and the speed of the ball mill is 450r / min;

[0044] After ball milling, due to the smaller powder particle size, the surface energy of the powder increases sharply, and ...

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Abstract

The invention relates to a preparation method of an Fe, W and C ternary phase carbide Fe3W3C, which comprises the steps of taking reduced iron powder, W powder, and carbon powder as reactor raw materials, preparing Fe-W-C mixed powder according to a stoichiometric ratio (Fe / W / C) of (3-4):(3-4):(1-2), adding a certain amount of raw material mixed powder and a grinding ball into a ball milling jar, after vacuumizing the ball milling jar, charging argon, performing ball milling on the Fe-W-C mixed powder under the argon shield for 30-50h with the steel ball having the diameter of 7-12mm at a ratio of a grinding medium to a material of (7-10):1, allowing the rotating speed of a ball mill to be 400-500r / min, after the ball milling is finished, opening the jar with a glove box to take the powder, performing compaction on the ball-milled powder via a stretcher, selecting a hollow cylinder with the pressure of 400-600MPa and the die dimension of phi 10-30, after the compaction, putting into an SL63-7B vacuum carbon tube furnace for sintering at a heating rate of 10-50 DEG C / min, holding at 1000-1500 DEG C for 0.5-5h, then cooling to the room temperature with the furnace, taking out, and obtaining a block material mainly comprising the ternary carbide Fe3W3C.

Description

technical field [0001] The invention belongs to the field of material processing, in particular to a Fe, W, C ternary phase carbide Fe 3 W 3 C and its preparation method. Background technique [0002] In the field of material processing, Fe 3 W 3 C ternary carbides were found to exist widely in the interface of tungsten carbide reinforced iron-based composites prepared by various methods, as well as in the interface between WC-rich phase wear-resistant coating and iron-based alloy, Fe 3 W 3 C has better mechanical properties and magnetic properties than common hard phases. Fe 3 W 3 C, as the interfacial transition layer of the composite material, can make the matrix and the reinforcing phase become a metallurgical bond and increase the interface strength. In addition, ternary metal carbides often have many excellent properties. For example, when WC-reinforced iron-based composites are prepared by casting infiltration method, obvious interfacial reaction will occur, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/56C04B35/622
Inventor 孙良李烨飞高义民汤姝莉
Owner XI AN JIAOTONG UNIV
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