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A kind of cobalt coated titanium hard alloy material and preparation method thereof

A cemented carbide, cladding technology, applied in the field of alloys, can solve the problems of no increase in hardness and tensile strength, low hardness and strength, and achieve high density, tight interconnection, high tensile strength and toughness. Effect

Active Publication Date: 2016-09-14
江苏江茂金属实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this technical scheme, in order to make up for the deficiency of cobalt-bonded tungsten carbide cemented carbide, vanadium-titanium carbide is used instead of tungsten carbide, so vanadium-titanium carbide-based cemented carbide makes up for the deficiency of cobalt-bonded tungsten carbide cemented carbide, and is economically more Superior, but although it has certain mechanical properties, the hardness and tensile strength have not improved, so the hardness and strength of this cemented carbide are low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] According to the preparation method provided by the invention, the cobalt-coated titanium cemented carbide material is prepared, and the steps are as follows:

[0026] (1) Take by weighing the oxides of titanium, aluminum, silicon and niobium according to the ratio of substances, and mix them uniformly;

[0027] Among them, the material ratio of titanium, aluminum, silicon and niobium in the material is 1:0.05:0.06:0.03;

[0028] (2) Put the mixture into a high-temperature carbonization furnace for carbonization at a temperature of 2200°C for 2 hours;

[0029] (3) After the carbonization is finished, wait to cool to room temperature, take out the mixture, put it into a grinder and grind it to powder, the average particle size is 0.5um;

[0030] (4) Put the powder into the chemical vapor deposition reaction chamber, evacuate to 30Pa, preheat to 700°C, use cobaltocene as the precursor, control the evaporation temperature of the raw material to 135°C, and pass in argon, t...

Embodiment 2

[0034] According to the preparation method provided by the invention, the cobalt-coated titanium cemented carbide material is prepared, and the steps are as follows:

[0035] (1) Take by weighing the oxides of titanium, aluminum, silicon and niobium according to the ratio of substances, and mix them uniformly;

[0036] Among them, the material ratio of titanium, aluminum, silicon and niobium in the material is: 1:0.15:0.18:0.09;

[0037] (2) Put the mixture into a high-temperature carbonization furnace for carbonization at a temperature of 2200°C for 3 hours;

[0038] (3) After the carbonization is finished, wait to cool to room temperature, take out the mixture, put it into a grinder and grind it to powder, the average particle size is 0.5um;

[0039] (4) Put the powder into the chemical vapor deposition reaction chamber, evacuate to 20Pa, preheat to 800°C, use cobaltocene as the precursor, control the evaporation temperature of the raw material to 150°C, and pass in argon, ...

Embodiment 3

[0043] According to the preparation method provided by the invention, the cobalt-coated titanium cemented carbide material is prepared, and the steps are as follows:

[0044] (1) Take by weighing the oxides of titanium, aluminum, silicon and niobium according to the ratio of substances, and mix them uniformly;

[0045] Among them, the material ratio of titanium, aluminum, silicon and niobium in the material is: 1:0.8:0.12:0.05;

[0046] (2) Put the mixture into a high-temperature carbonization furnace for carbonization at a temperature of 2200°C for 2 hours;

[0047] (3) After the carbonization is finished, wait to cool to room temperature, take out the mixture, put it into a grinder and grind it to powder, the average particle size is 0.5um;

[0048] (4) Put the powder into the chemical vapor deposition reaction chamber, evacuate to 50Pa, preheat to 700°C, use cobaltocene as the precursor, control the evaporation temperature of the raw material to 145°C, and pass in argon, t...

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Abstract

The invention provides a cobalt-coated titanium hard alloy material and a preparation method thereof and relates to the field of the alloy materials. The major components of the hard alloy are titanium carbide, aluminum carbide, silicon carbide, niobium carbide and coated metal cobalt, wherein the substance ratio of titanium to aluminum to silicon to niobium in the material is 1: (0.05-0.15): (0.06-0.18): (0.03-0.09); a coating layer is a cobalt nanoparticle layer and is 50-200nm thick. The preparation method of the hard alloy material comprises the steps of carbonizing the oxides of the four elements at a high temperature, crushing the mixture to corresponding granularity, coating the powder with Co metal particles and finally calcining. According to the cobalt-coated titanium hard alloy material and the preparation method thereof, the material is formed by covering the powder of the carbides of the four elements with the Co metal nanoparticle layer and finally calcining at a high temperature. The obtained titanium hard alloy material has relatively high tensile strength and toughness in addition to relatively high compactness.

Description

technical field [0001] The invention belongs to the field of alloy technology, and in particular relates to a cobalt-coated titanium hard alloy material with plasticity and strong mechanical properties and good strength and toughness and a preparation method thereof. Background technique [0002] Pure titanium has strong mechanical properties, good plasticity, and is easy to process. If there are impurities, especially O, N, and C, the strength and hardness of titanium will be improved, but its plasticity will be reduced and its brittleness will be increased. At the same time, titanium is a metal that is easily passivated, and its passivation film can heal itself after being damaged in an oxygen-containing environment. Therefore, titanium and titanium alloys have excellent corrosion resistance, especially stable performance, far superior to stainless steel. [0003] Liquid titanium can dissolve almost all metals and form various alloys such as solid solutions or metal compo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C29/06C22C1/05
CPCC22C1/051C22C29/06C22C29/067
Inventor 求才军
Owner 江苏江茂金属实业有限公司
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