CN102436864B - Titanium carbide based electrical contact material as well as preparation method and applications thereof - Google Patents

Titanium carbide based electrical contact material as well as preparation method and applications thereof Download PDF

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Publication number
CN102436864B
CN102436864B CN 201110213668 CN201110213668A CN102436864B CN 102436864 B CN102436864 B CN 102436864B CN 201110213668 CN201110213668 CN 201110213668 CN 201110213668 A CN201110213668 A CN 201110213668A CN 102436864 B CN102436864 B CN 102436864B
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alloy
electrical contact
titanium carbide
contact material
carbide base
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CN 201110213668
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CN102436864A (en
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邓刚
方民宪
庞立娟
张雪峰
同艳维
李会容
李玉和
刘松利
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Panzhihua University
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Panzhihua University
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Abstract

The invention relates a titanium carbide based electrical contact material as well as a preparation method and applications thereof, and belongs to the field of materials. The technical problem to be solved by the invention is to provide a novel electrical contact material and the preparation method and the applications thereof. In the invention, the electrical contact material is a titanium carbide based electrical contact material; and the titanium carbide based electrical contact material is prepared from the following components in parts by weight: 80-99 parts of titanium carbide, 1-20 parts of bonding agent, wherein the bonding agent is selected from at least one of metal, alloy, and carbon powder.

Description

Titanium carbide base electrical contact material and its production and use
Technical field
The present invention relates to titanium carbide base electrical contact material and its production and use, belong to the material field.
Background technology
At present, electrical contact material roughly can be divided into following a few class: silver based contact material, tungsten base contact material, copper-base contact material and precious metal-based light current contactor material.Wherein, the most representative contact material is Cu-W alloy and Ag base contact material (AgSnO 2, AgCdO, Ag-W the system etc.) two big classes.Because W, Ag etc. all belong to noble metal, resource reserve is limited, and adopts such noble metal to make that as raw material the cost of contact material is too expensive, is unfavorable for applying.In addition, existing contact material anti-wear performance difference and be difficult to using on sliding contact.
Therefore, develop that the electric conductivity of other kind is good, hardness is high, aboundresources, contact material wear-resistant, that cost is low become a kind of trend.
Summary of the invention
First technical problem to be solved by this invention provides a kind of new electrical contact material.
Electrical contact material of the present invention is the titanium carbide base electrical contact material, and it is prepared from by following components in weight percentage: 80~99 parts of titanium carbides, 20~1 parts of binding agents; Wherein, described binding agent is selected from metal, alloy, the carbon dust at least a.
Wherein, titanium carbide base electrical contact material of the present invention, it preferably is prepared from by following components in weight percentage: 80~85 parts of titanium carbides, 20~15 parts of binding agents.
Wherein, titanium carbide base electrical contact material of the present invention, in its component, described metal is preferably selected from Co, Cu, Ni, Mo, at least a among the Cr; Described alloy is preferably selected from Cu-Cr alloy, Cu-Ni alloy, Co-Cr alloy, Co-Ni alloy, Co-Cu alloy, Co-Mo alloy, Cu-Mo alloy, Ni-Mo alloy, Ni-Cr alloy, the Mo-Cr alloy at least a.
1), good in oxidation resistance the advantage of C, alloy or metal that the present invention selects is:.2), good with the TiC wetting of particulates.3), the C that adds can separate out from these simple substance or alloy in disperse, is conducive to the even distribution of C.4), good conductivity.Add the effect that Co, Ni mainly have been binding agents, will be consolidated by binding agent between the titanium carbide granule, improve the effect of conductivity simultaneously in addition; Adding Cu and C mainly is to increase conductivity, in addition, adds the effect that C strengthens pressed compact (sintering intermediate products) mouldability in addition, adds the effect that Cu also has binding agent; Add Mo the effect of the wetability of improvement is arranged; Add Cr the effect that strengthens conductivity effect, binding agent and raising mechanical performance is arranged.
Second technical problem to be solved by this invention provides a kind of method for preparing above-mentioned titanium carbide base electrical contact material, and it comprises the steps:
A, take off and state raw material blending by weight ratio: 80~99 parts of titanium carbides, 20~1 parts of binding agents; Wherein, described binding agent is selected from metal, alloy, the carbon dust at least a;
Raw material compression moulding under the pressure of 20~30MPa behind b, a step mixing, (vacuum degree of vacuum condition is preferably 4 * 10 at vacuum condition then -4~5 * 10 -4Pa) in 1000~1600 ℃ of insulations 3~6 hours, namely get the titanium carbide base electrical contact material under.
Wherein, the present invention prepares the method for titanium carbide base electrical contact material, preferably takes off by weight ratio in its a step and states raw material blending: 80~85 parts of titanium carbides, 20~15 parts of binding agents.
Wherein, the present invention prepares the method for titanium carbide base electrical contact material, and the metal described in its a step is preferably selected from Co, Cu, and Ni, Mo, at least a among the Cr; Alloy described in a step is preferably selected from Cu-Cr alloy, Cu-Ni alloy, Co-Cr alloy, Co-Ni alloy, Co-Cu alloy, Co-Mo alloy, Cu-Mo alloy, Ni-Mo alloy, Ni-Cr alloy, the Mo-Cr alloy at least a.
Wherein, the present invention prepares the method for titanium carbide base electrical contact material, and the granularity of the raw material in its a step is excessive, and granule surface activity is good inadequately, is unfavorable for sintering, and sintering time will prolong; If undersized except increasing cost, also can cause the metal powder granulates surface activity very good, in easily oxidation of the course of processing (in the air), and the problem of the pressed density of pressed compact reduction.In order to reduce or to avoid the problems referred to above, its granularity is preferably 200~400 orders.
The present invention also provides the purposes of above-mentioned titanium carbide base electrical contact material in the preparation electrical contact.
The present invention also provides the electrical contact by above-mentioned titanium carbide base electrical contact material preparation.
The present invention has following beneficial effect: with common Cu-W, Ag-W, Ag-SnO 2Electrical contact material Deng series is compared, titanium carbide base electrical contact material of the present invention adopts conductivity, wear-resistant and oxidation resistant titanium carbide pottery to become cermet with the metal or alloy mixed sintering, titanium carbide and metal bond strength height in this material, contact resistance is low, resistance fusion welding is good, and the arc resistant corrosive power is strong.Preparation technology's simple possible of material, cost is low, is fit to industrial mass production.
Embodiment
Electrical contact material of the present invention is the titanium carbide base electrical contact material, and it is prepared from by following components in weight percentage: 80~99 parts of titanium carbides, 20~1 parts of binding agents; Wherein, described binding agent is selected from metal, alloy, the carbon dust at least a.
Wherein, titanium carbide base electrical contact material of the present invention, it preferably is prepared from by following components in weight percentage: 80~85 parts of titanium carbides, 20~15 parts of binding agents.
Wherein, titanium carbide base electrical contact material of the present invention, in its component, described metal is preferably selected from Co, Cu, Ni, Mo, at least a among the Cr; Described alloy is preferably selected from Cu-Cr alloy, Cu-Ni alloy, Co-Cr alloy, Co-Ni alloy, Co-Cu alloy, Co-Mo alloy, Cu-Mo alloy, Ni-Mo alloy, Ni-Cr alloy, the Mo-Cr alloy at least a.
1), good in oxidation resistance the advantage of C, alloy or metal that the present invention selects is:.2), good with the TiC wetting of particulates.3), the C that adds can separate out from these simple substance or alloy in disperse, is conducive to the even distribution of C.4), good conductivity.Add the effect that Co, Ni mainly have been binding agents, will be consolidated by binding agent between the titanium carbide granule, improve the effect of conductivity simultaneously in addition; Adding Cu and C mainly is to increase conductivity, in addition, adds the effect that C strengthens pressed compact (sintering intermediate products) mouldability in addition, adds the effect that Cu also has binding agent; Add Mo the effect of the wetability of improvement is arranged; Add Cr the effect that strengthens conductivity effect, binding agent and raising mechanical performance is arranged.
The present invention also provides a kind of method for preparing above-mentioned titanium carbide base electrical contact material, and it comprises the steps:
A, take off and state raw material blending by weight ratio: 80~99 parts of titanium carbides, 20~1 parts of binding agents; Wherein, described binding agent is selected from metal, alloy, the carbon dust at least a;
Raw material compression moulding under the pressure of 20~30MPa behind b, a step mixing, (vacuum degree of vacuum condition is preferably 4 * 10 at vacuum condition then -4~5 * 10 -4Pa) in 1000~1600 ℃ of insulations 3~6 hours, namely get the titanium carbide base electrical contact material under.
Wherein, the present invention prepares the method for titanium carbide base electrical contact material, preferably takes off by weight ratio in its a step and states raw material blending: 80~85 parts of titanium carbides, 20~15 parts of binding agents.
Wherein, the present invention prepares the method for titanium carbide base electrical contact material, and the metal described in its a step is preferably selected from Co, Cu, and Ni, Mo, at least a among the Cr; Alloy described in a step is preferably selected from Cu-Cr alloy, Cu-Ni alloy, Co-Cr alloy, Co-Ni alloy, Co-Cu alloy, Co-Mo alloy, Cu-Mo alloy, Ni-Mo alloy, Ni-Cr alloy, the Mo-Cr alloy at least a.
Wherein, the present invention prepares the method for titanium carbide base electrical contact material, and the granularity of the raw material in its a step is excessive, and granule surface activity is good inadequately, is unfavorable for sintering, and sintering time will prolong; If undersized except increasing cost, also can cause the metal powder granulates surface activity very good, in easily oxidation of the course of processing (in the air), and the problem of the pressed density of pressed compact reduction.In order to reduce or to avoid the problems referred to above, its granularity is preferably 200~400 orders.
The present invention also provides the purposes of above-mentioned titanium carbide base electrical contact material in the preparation electrical contact.
The present invention also provides the electrical contact by above-mentioned titanium carbide base electrical contact material preparation.
Be further described below in conjunction with the specific embodiment of the present invention of embodiment, therefore do not limit the present invention among the described scope of embodiments.
The preparation of embodiment 1 titanium carbide base electrical contact material of the present invention
With 8g TiC powder (granularity 200 orders) and 2g Co mixing, compression moulding on the hydraulic press of 20MPa is then taken out briquetting and is put sintering in the vacuum sintering furnace into, and sintering temperature is 1500 ℃, and temperature retention time is 6 hours, obtains the titanium carbide base electrical contact material.Measure the performance of gained titanium carbide base electrical contact material, the result is as shown in table 1.
The preparation of embodiment 2 titanium carbide base electrical contact materials of the present invention
With 7g TiC powder (granularity 300 orders) and 3g Cu mixing, compression moulding on the hydraulic press of 25MPa is then taken out briquetting and is put sintering in the vacuum sintering furnace into, and sintering temperature is 1200 ℃, and temperature retention time is 4 hours, obtains the titanium carbide base electrical contact material.Measure the performance of gained titanium carbide base electrical contact material, the result is as shown in table 1.
The preparation of embodiment 3 titanium carbide base electrical contact materials of the present invention
With 6g TiC powder (granularity 400 orders) and 4g Ni mixing, compression moulding on the hydraulic press of 20MPa is then taken out briquetting and is put sintering in the vacuum sintering furnace into, and sintering temperature is 1600 ℃, and temperature retention time is 3 hours, obtains the titanium carbide base electrical contact material.Measure the performance of gained titanium carbide base electrical contact material, the result is as shown in table 1.
The preparation of embodiment 4 titanium carbide base electrical contact materials of the present invention
With 9.8g TiC powder (granularity 350 orders) and 0.2g carbon dust mixing, compression moulding on the hydraulic press of 30MPa is then taken out briquetting and is put sintering in the vacuum sintering furnace into, and sintering temperature is 1500 ℃, and temperature retention time is 3.5 hours, obtains the titanium carbide base electrical contact material.Measure the performance of gained titanium carbide base electrical contact material, the result is as shown in table 1.
The preparation of embodiment 5 titanium carbide base electrical contact materials of the present invention
With 8g TiC powder (granularity 250 orders) and 0.2g Mo and 1.8g Cr mixing, compression moulding on the hydraulic press of 20MPa is then taken out briquetting and is put sintering in the vacuum sintering furnace into, and sintering temperature is 1800 ℃, temperature retention time is 4.5 hours, obtains the titanium carbide base electrical contact material.Measure the performance of gained titanium carbide base electrical contact material, the result is as shown in table 1.
The preparation of embodiment 6 titanium carbide base electrical contact materials of the present invention
With 7g TiC powder (granularity 300 orders) and 3g Cu-Cr alloy (the Cu content in the Cu-Cr alloy is 60wt%) mixing, compression moulding on the hydraulic press of 20MPa then, take out briquetting and put sintering in the vacuum sintering furnace into, sintering temperature is 1500 ℃, temperature retention time is 3 hours, obtains the titanium carbide base electrical contact material.Measure the performance of gained titanium carbide base electrical contact material, the result is as shown in table 1.
The preparation of embodiment 7 titanium carbide base electrical contact materials of the present invention
With 8g TiC powder (granularity 200 orders) and 2g Co-Ni alloy (the Co content in the Co-Ni alloy is 60wt%) mixing, compression moulding on the hydraulic press of 22MPa then, take out briquetting and put sintering in the vacuum sintering furnace into, sintering temperature is 1500 ℃, temperature retention time is 5 hours, obtains the titanium carbide base electrical contact material.Measure the performance of gained titanium carbide base electrical contact material, the result is as shown in table 1.
The preparation of embodiment 8 titanium carbide base electrical contact materials of the present invention
With 6g TiC powder (granularity 200 orders) and 4g Cu-Ni alloy (the Cu content in the Cu-Ni alloy is 60wt%) and 40g Ni mixing, compression moulding on the hydraulic press of 27MPa then, take out briquetting and put sintering in the vacuum sintering furnace into, sintering temperature is 1400 ℃, temperature retention time is 4.5 hours, obtains the titanium carbide base electrical contact material.Measure the performance of gained titanium carbide base electrical contact material, the result is as shown in table 1.
Table 1 titanium carbide base electrical contact material of the present invention performance measurement result

Claims (6)

1. the titanium carbide base electrical contact material is characterized in that being prepared from by following components in weight percentage: 80~85 parts of titanium carbides, 20~15 parts of binding agents; Wherein, described binding agent is alloy and carbon dust; Described alloy is selected from Cu-Cr alloy, Cu-Ni alloy, Co-Cr alloy, Co-Ni alloy, Co-Cu alloy, Co-Mo alloy, Cu-Mo alloy, Ni-Mo alloy, Ni-Cr alloy, the Mo-Cr alloy at least a.
2. the method for preparing the titanium carbide base electrical contact material is characterized in that comprising the steps:
A, take off and state raw material blending by weight ratio: 80~85 parts of titanium carbides, 20~15 parts of binding agents; Wherein, described binding agent is alloy and carbon dust; Described alloy is selected from Cu-Cr alloy, Cu-Ni alloy, Co-Cr alloy, Co-Ni alloy, Co-Cu alloy, Co-Mo alloy, Cu-Mo alloy, Ni-Mo alloy, Ni-Cr alloy, the Mo-Cr alloy at least a;
Raw material compression moulding under the pressure of 20~30MPa behind b, a step mixing, then under vacuum condition in 1000~1600 ℃ the insulation 3~6 hours, namely get the titanium carbide base electrical contact material.
3. the method for preparing the titanium carbide base electrical contact material according to claim 2, it is characterized in that: the granularity of the raw material in a step is 200~400 orders.
4. the method for preparing the titanium carbide base electrical contact material according to claim 2, it is characterized in that: the vacuum degree of the vacuum condition described in the b step is 4 * 10 -4~5 * 10 -4Pa.
5. the described titanium carbide base electrical contact material of claim 1 is in the purposes of preparation in the electrical contact.
6. by the electrical contact of the described titanium carbide base electrical contact material of claim 1 preparation.
CN 201110213668 2011-07-28 2011-07-28 Titanium carbide based electrical contact material as well as preparation method and applications thereof Expired - Fee Related CN102436864B (en)

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