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Preparation method of titanium nitride-ferrous metal ceramics

A technology of iron metal and titanium nitride, applied in the field of cermet materials and preparation, can solve the problems of TiN denitrification, reduction of material strength and hardness, etc., and achieve the effects of high density, uniform distribution of each phase, and uniform powder particle size.

Inactive Publication Date: 2015-07-01
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although high-temperature sintering can improve the wettability of metals to TiN, TiN will undergo severe denitrification at high temperatures, resulting in a large number of pores and porosity inside the material, resulting in a decrease in the strength and hardness of the material.

Method used

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  • Preparation method of titanium nitride-ferrous metal ceramics
  • Preparation method of titanium nitride-ferrous metal ceramics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 10g of iron block and 90g of titanium sponge were weighed according to the proportion of 10% Fe mass fraction, mixed uniformly to make alloy masterbatch, and the masterbatch was prepared into alloy ingot by vacuum smelting method. The alloy ingot was cut into slices, and placed in a tubular atmosphere furnace for hydrogenation embrittlement with high-purity hydrogen. The hydrogenation temperature was 650°C, the heating rate was 10°C / min, and the hydrogenation time was 3h. After the hydrogenated alloy is preliminarily crushed, it is placed in a stainless steel ball mill tank for high-energy ball mill crushing. The mass ratio of the ball to material is 8:1, and the TiH is obtained by ball milling for 6 hours. x -Fe composite powder. Then, the composite powder was placed in a tube-type atmosphere furnace for dehydrogenation treatment under the protection of argon flow. The dehydrogenation temperature was 620°C, the heating rate was 10°C / min, and the dehydrogenation time wa...

Embodiment 2

[0024] 15g of iron block and 85g of titanium sponge were weighed according to the proportion of 15% Fe mass fraction, mixed uniformly to make alloy masterbatch, and the masterbatch was prepared into alloy ingot by vacuum smelting method. The alloy ingot was cut into slices, and placed in a tubular atmosphere furnace for hydrogenation embrittlement by high-purity hydrogen. The hydrogenation temperature was 680 °C and the heating rate was 10 o C / min, the hydrogenation time is 3h. After the hydrogenated alloy is preliminarily crushed, it is placed in a stainless steel ball mill tank for high-energy ball mill crushing. The mass ratio of the ball to material is 8:1, and the TiH is obtained by ball milling for 4 hours. x -Fe composite powder. Then, the composite powder was placed in a tubular atmosphere furnace and dehydrogenated under the protection of argon flow. The dehydrogenation temperature was 640°C, the heating rate was 10°C / min, and the dehydrogenation time was 2.5h to obt...

Embodiment 3

[0026] 20g of iron block and 80g of titanium sponge were weighed according to the proportion of 20% Fe mass fraction, mixed evenly to make alloy masterbatch, and the masterbatch was prepared into alloy ingot by vacuum smelting method. The alloy ingot was cut into slices, and placed in a tubular atmosphere furnace for hydrogenation embrittlement with high-purity hydrogen. The hydrogenation temperature was 700°C, the heating rate was 10°C / min, and the hydrogenation time was 4h. After the hydrogenated alloy is preliminarily crushed, it is placed in a stainless steel ball mill tank for high-energy ball mill crushing. The mass ratio of the ball to material is 8:1, and the TiH is obtained by ball milling for 6 hours. x -Fe composite powder. Then, the composite powder was placed in a tubular atmosphere furnace and dehydrogenated under the protection of argon flow. The dehydrogenation temperature was 650°C, the heating rate was 10°C / min, and the dehydrogenation time was 3h to obtain T...

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Abstract

The invention relates to a preparation method of titanium nitride-ferrous metal ceramics. The preparation method comprises the steps of preparing a titanium-ferrous (Ti-Fe) alloy cast ingot with a vacuum melting method to enable Fe to exist in Ti in a form of solid solution and TiFe intermediate phase; carrying out hydrogenation embrittlement, ball-milling crushing and dehydrogenation and nitrogen treatment on the Ti-Fe alloy cast ingot to obtain titanium nitride-ferrous (TiN-Fe) metal-ceramic composite powder; sintering the composite powder subjected to green compacting to obtain a TiN-Fe metal-ceramic material. The TiN-Fe metal-ceramic composite powder prepared by the method provided by the invention consists of two phases, i.e. TiN and Fe, and is uniform in powder size and good in fluidity, the TiN-Fe block metal-ceramic material obtained by sintering the TiN-Fe metal-ceramic composite powder subjected to green compacting is uniform in phase distribution and relatively high in density, and the average microscopy Vickers hardness of the materials reaches 1023 HV.

Description

technical field [0001] The invention belongs to the field of metal ceramic materials and preparation. Background technique [0002] Cermet refers to the composite material of metal and ceramic prepared by powder metallurgy method. It takes into account the high toughness and plasticity of metal and the high melting point, corrosion resistance and wear resistance of ceramics. It is widely used in aerospace, national defense and military industry, precision manufacturing and other fields have broad application prospects; at present, the specific application objects mainly include high-temperature wear-resistant parts, temperature-measuring components, high-temperature-resistant coatings, high-speed cutting tools, stamping dies, etc. As an ideal ceramic phase, titanium nitride (TiN) has a series of advantages such as high strength, high hardness, high temperature resistance, acid and alkali corrosion resistance, wear resistance, good electrical conductivity and thermal conducti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/12C22C33/06C22C33/02B22F9/04B22F9/16
Inventor 唐建成叶楠魏晓枭卓海鸥
Owner NANCHANG UNIV
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