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Titanium monoxide based metal ceramic gold-imitated material and its preparing process

A technology of titanium monoxide and base metal, which is applied in the field of titanium monoxide-based cermet gold imitation materials and its preparation, can solve the problems of poor corrosion resistance and discoloration resistance, lower TiN resistance to discoloration, and high cost, and achieve interface High bonding strength, excellent comprehensive performance, and excellent mechanical properties

Inactive Publication Date: 2005-06-01
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Copper-based alloy imitation gold materials have been widely used, but the problems of poor corrosion resistance and discoloration resistance in sweat and atmosphere have not been fundamentally solved, and the hardness is low and easy to be scratched;
[0005] TaC-based cermet imitation gold material, TaC itself is expensive and has a large specificity (14.3g / cm 3 );
[0006] TiN itself has superior comprehensive properties, but it is very difficult and costly to prepare high-quality TiN powder with a single phase composition and pure color, and TiN is easy to decompose during high-temperature burning, so a large amount of Ni is added as the metal binder phase. It also reduces the inherent deformation resistance of TiN, so it has not been widely used

Method used

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Effect test

Embodiment 1

[0050] (1) Raw powder and its proportioning ratio: the oxygen index of titanium monoxide is 0.95, the average particle size is 2.8 μm, the particle sizes of Fe, Cr, and Si powders are 3.0 μm, 4.5 μm and 3.2 μm respectively; the total content of binder phase elements is 2 %, the composition is Fe-25%Cr-10%Si;

[0051] (2) Billet making method: Mix the above raw powders evenly according to the proportion requirements, and press them into a steel mold with a pressure of 2 tons / cm 2 ;

[0052] (3) Sintering process: temperature 1500°C, holding time 120min, vacuum pressure <0.02Pa;

[0053] The performance test results of imitation gold materials are listed in Table 1.

Embodiment 2

[0055] (1) Raw powder and its ratio: the oxygen index of titanium monoxide is 0.95, the average particle size is 2.8 μm, the particle sizes of Fe, Cr, and Si powders are 3.0 μm, 4.5 μm and 3.2 μm respectively; the total content of binder phase elements is 4 %, the composition is Fe-25%Cr-8%Si.

[0056] (2) Billet making method: Mix the above raw powders evenly according to the proportion requirements, and press them into a steel mold with a pressure of 2 tons / cm 2 ;

[0057] (3) Sintering process: temperature 1500°C, holding time 120min, vacuum pressure <0.02Pa;

[0058] The performance test results of imitation gold materials are listed in Table 1.

Embodiment 3

[0060] (1) Raw powder and its ratio: the oxygen index of titanium monoxide is 0.95, the average particle size is 2.8 μm, the particle sizes of Fe, Cr, and Si powders are 3.0 μm, 4.5 μm and 3.2 μm respectively; the total content of binder phase elements is 8 %, the composition is Fe-25%Cr-6%Si.

[0061] (2) Billet making method: Mix the above raw powders evenly according to the proportion requirements, and press them into a steel mold with a pressure of 2 tons / cm 2 ;

[0062] (3) Sintering process: temperature 1500°C, holding time 120min, vacuum pressure <0.02Pa;

[0063] The performance test results of imitation gold materials are listed in Table 1.

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Abstract

The present invention relates to powder metallurgical technology, and is especially titanium monoxide-base cermet material and its preparation process. The present invention features that into the Fe-Cr alloy on titanium monoxide base with oxygen index of 0.8-1.2, one or several of Mo, Si and Ni elements in 0.1-20 5 are added. The titanium monoxide-base cermet gold-imitating material has chroma difference to 24K gold of 0.005-0.010, stable color in atmosphere, no color change after setting in gold corroding liquid at 25 deg.c for over 40 days, bending strength of 440-800 MPa, breaking toughness of 5.2-10.0 MNm-3 / 2. The titanium monoxide-base cermet gold-imitating material has excellent comprehensive performance.

Description

Technical field: [0001] The invention relates to the field of powder metallurgy, in particular to a titanium monoxide-based cermet imitation gold material and a preparation method thereof. Background technique: [0002] At present, the imitation gold alloy materials that have been applied or are being studied at home and abroad include: copper-based alloy imitation gold material, low-K gold imitation gold material, TaC-based cermet gold-imitation material and TiN-based cermet gold-imitation material. [0003] Copper-based alloy imitation gold materials have been widely used, but the problems of poor corrosion resistance and discoloration resistance in sweat and atmosphere have not been fundamentally solved, and the hardness is low and easy to be scratched; [0004] Low-K gold imitation gold materials are generally Cu-Au alloys with a gold content of less than 9%, and the price is still relatively expensive, and its color and tarnish resistance are far inferior to pure gold; ...

Claims

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Application Information

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IPC IPC(8): C22C29/12
Inventor 钟晖李庆奎钟海云李荐岳忠杨建文戴艳阳
Owner CENT SOUTH UNIV
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