CN103762099B - A kind of money base composite oxides electric contact material and application thereof - Google Patents
A kind of money base composite oxides electric contact material and application thereof Download PDFInfo
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- CN103762099B CN103762099B CN201310710953.2A CN201310710953A CN103762099B CN 103762099 B CN103762099 B CN 103762099B CN 201310710953 A CN201310710953 A CN 201310710953A CN 103762099 B CN103762099 B CN 103762099B
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Abstract
The present invention relates to a kind of money base composite oxides electric contact material and the application in the production process of relay thereof, this money base composite oxides electric contact material includes two-layer, wherein one layer is AgW30 layer, another layer is the composite oxide layer of silver, being fixed by fusion between two-layer, wherein the composite oxide layer of silver is prepared by Ag, Zn, La and Ti, and this money base composite oxides electric contact material is while improving contact performance, also save the consumption of ag material, greatly reduce cost。
Description
Technical field
The present invention relates to money base composite oxides electric contact material and application thereof, be especially suitable for exchange relay or the electric contact material of automobile lift-launch relay。
Background technology
China's relay industry, its production technology, production technology mainly produce with the cheap labour-intensive mode of production for a long time, thus product quality, performance and price all have weak point in competition in the international market, the properties of product of a same specification have very big difference。Therefore, the outlet of domestic relay industry is in that to improve constantly on the basis of the part accuracy of manufacture, focus on the development of product and the raising of the improvement of Assembling Production pattern and reliability, to realizing automatization or the semi-automation of Assembling Production technique, finally realize production integration, thus improving product technology class and technology content, improving quality, reducing cost。The performance of home products and external advanced enterprises have very big gap。Material Quality Research for contact part silver alloy still rests on laboratory stage。
As the electric contact material assembled in the relay used under general AC load, common are Ag-CdO system electric contact material。Ag-CdO system slider material is to have the characteristics such as deposit resistance property, resistance to expendable and contact resistance stability as electric contact material。But, Cd is the element that human body is poisonous, it is contemplated that recent environmental problem, it is desirable to do not manufacture and use it。Accordingly, it would be desirable to carry out the exploitation of the electric contact material without Cd。
As middle materials without Cd used such as the alternating current general-purpose relays at AC load, the clear 54-110124 of patent documentation TOHKEMY and patent documentation JP examined patent publication 55-4825 discloses the oxide based electric contact material of Ag-such as Ag-SnO2 system and Ag-SnO2-In2O3 system。Wherein it is known that the electric contact material of Ag-SnO2 system shows very excellent deposit resistance property under the hypovolemic load that dash current occurs。But, under inductive load, compared with conventional Ag-CdO system electric contact material, the resistance to consumption characteristics of Ag-SnO2 system electric contact material is slightly poor, accordingly, it is difficult to guarantee and Ag-CdO the system equal or better durability of electric contact material。It is also known that, possibly together with the Ag-SnO2-In2O3 system electric contact material of In2O3 in Ag-SnO2 system electric contact material, significantly improving the resistive load of Ag-SnO2 system electric contact material and the resistance to expendable to inductive load, same with Ag-CdO system electric contact material have the wear properties that various balancing the loads are good。But In is rare metal, and the raw material as the ito transparent electrode in the display devices such as recent liquid crystal or plasma is just being widely used, and therefore In resource is faced with the problem of exhaustion and In big bulge in price, also has influence on electric contact material manufacturing cost。
Additionally, the domestic research to ag-based contact material also has following patent documentation: CN1417817A, CN1425790A, CN1441071A, CN1167835A, CN101202169A, CN1443864A etc.。
Summary of the invention
The present invention is directed to the deficiency of above existence, it is provided that a kind of money base composite oxides electric contact material, and use it in relay, this money base composite oxides electric contact material has excellent mechanics and electricity combination property。
For realizing above-mentioned purpose, the present invention provides a kind of money base composite oxides electric contact material, this money base composite oxides electric contact material, including two-layer, wherein one layer is AgW30 layer, another layer is the composite oxide layer of silver, and fixing by fusing between two-layer, wherein the preparation method of the composite oxide layer of silver comprises the following steps:
(1) alloy melting, forms alloy melt by after the mixing of following mass percent through melting by Ag, Zn, La, Ti, and wherein Zn is 2-5%, La be 0.5-1%, Ti is 2-5%, and surplus is Ag；
(2) powder by atomization, makes alloy powder by alloy melt through the atomization of high-pressure atomization equipment；
(3) isostatic pressing ingot, is processed into embryo ingot by alloy powder by isostatic pressing ingot；
(4) sintering, is sintered embryo ingot in non-oxidative medium, and sintering temperature is 450 DEG C-600 DEG C and obtains alloy powder sintered ingot；
(5) through extruding, alloy powder sintered ingot is crushed to extrusion plate；
(6) internal oxidition, prepares described money base composite oxides electric contact material by the sheet material that step (5) prepares by internal oxidation。
In a preferred embodiment of the present invention, arranging further is that in described step (1), smelting temperature is 600 DEG C-800 DEG C。
In a preferred embodiment of the present invention, wherein Zn be 5%, La be 1%, Ti be 5%。
In a preferred embodiment of the present invention, described step (2) powder by atomization is gas-atomized powder, and wherein aerosolization pressure is at 10MPa-15MPa。
In a preferred embodiment of the present invention, the hydrostatic pressure in described step (3) controls at 100MPa-150MP。
In a preferred embodiment of the present invention, in described step (4), non-oxidative medium is vacuum or or nitrogen atmosphere。
In a preferred embodiment of the present invention, the extrusion temperature in described step (5) 500 DEG C-700 DEG C, extrusion ratio >=80。
In a preferred embodiment of the present invention, in described step (6), internal oxidation process condition controls: pure oxygen pressure 0.5-1MPa, temperature 500-700 DEG C。
In a preferred embodiment of the present invention, in described AgW30 layer, the weight/mass percentage composition of silver is 70%, and the weight/mass percentage composition of W is 30%。
The invention still further relates to and above-mentioned money base composite oxides electric contact material is used in the production process of relay。
In specifically used, using AgW30 layer as solder side, the composite oxide layer of silver is as work surface。Using the composite oxide layer of this silver as work surface so that this material has good erosion resisting and resistance fusion welding energy, and has good break-make performance。The present invention passes through the optimization of the selection to metal and proportioning and the structural design to electric contact material, while improving contact performance, also saves the consumption of ag material, greatly reduces cost。
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further described。
Fig. 1 is the schematic diagram of the money base composite oxides electric contact material of the present invention
Wherein 1 represents AgW30 layer, and 2 represent the composite oxide layer of silver。
Detailed description of the invention
Illustrate that the invention will be further described with embodiment below in conjunction with accompanying drawing:
Embodiment 1
Money base composite oxides electric contact material A includes two-layer, and wherein one layer is AgW30 layer, and another layer is the composite oxide layer of silver, and fixing by fusing between two-layer, wherein the preparation method of the composite oxide layer of silver comprises the following steps:
(1) alloy melting, forms alloy melt by after the mixing of following mass percent through melting by Ag, Zn, La, Ti, wherein Zn be 5%, La be 1%, Ti be 5%, surplus is Ag, and smelting temperature is 600 DEG C；
(2) gas-atomized powder, makes alloy powder by alloy melt through the atomization of high-pressure atomization equipment, and wherein aerosolization pressure is at 10MPa；
(3) isostatic pressing ingot, is processed into embryo ingot by alloy powder by isostatic pressing ingot, and Stress control is at 150MPa；
(4) sintering, is sintered embryo ingot in nitrogen atmosphere, and sintering temperature is 500 DEG C and obtains alloy powder sintered ingot；
(5) through extruding, alloy powder sintered ingot is crushed to extrusion plate, extrusion temperature 600 DEG C, extrusion ratio >=80；
(6) internal oxidition, prepares described money base composite oxides electric contact material by the sheet material that step (5) prepares by internal oxidation, wherein pure oxygen pressure 1MPa, temperature 500 DEG C。
Embodiment 2
Money base composite oxides electric contact material B includes two-layer, and wherein one layer is AgW30 layer, and another layer is the composite oxide layer of silver, and fixing by fusing between two-layer, wherein the preparation method of the composite oxide layer of silver comprises the following steps:
(1) alloy melting, forms alloy melt by after the mixing of following mass percent through melting by Ag, Zn, La, Ti, wherein Zn be 2%, La be 0.5%, Ti be 5%, surplus is Ag, and smelting temperature is 800 DEG C；
(2) gas-atomized powder, makes alloy powder by alloy melt through the atomization of high-pressure atomization equipment, and wherein aerosolization pressure is at 15MPa；
(3) isostatic pressing ingot, is processed into embryo ingot by alloy powder by isostatic pressing ingot, and Stress control is at 120MPa；
(4) sintering, is sintered embryo ingot in nitrogen atmosphere, and sintering temperature is 600 DEG C and obtains alloy powder sintered ingot；
(5) through extruding, alloy powder sintered ingot is crushed to extrusion plate, extrusion temperature 500 DEG C, extrusion ratio >=80；
(6) internal oxidition, prepares described money base composite oxides electric contact material by the sheet material that step (5) prepares by internal oxidation, wherein pure oxygen pressure 0.5MPa, temperature 700 DEG C。
The money base composite oxides electric contact material that above-described embodiment 1 and 2 is prepared carries out the performance test results and sees table 1 below。
Table 1
| Embodiment 1(A) | Embodiment 2(B) | |
| Conductivity (μ Ω .cm) | 3.6 | 3.2 |
| Tensile strength (MPa) | 408 | 401 |
| Hardness (HV) | 145 | 142 |
| Endurance life number of times | 50389 | 48970 |
| Current capacity (A) | 32A | 30A |
Above example has been shown and described the ultimate principle of the present invention and principal character and advantages of the present invention。Skilled person will appreciate that of the industry; the present invention is not restricted to the described embodiments; described in above-described embodiment and description is that principles of the invention is described; rather than the scope being intended to limit the present invention in any manner; without departing from the scope of the invention; the present invention also has various changes and modifications, and these changes and improvements both fall within claimed scope。
Claims (2)
1. a money base composite oxides electric contact material, it is characterized in that, this money base composite oxides electric contact material includes two-layer, wherein one layer is AgW30 layer, another layer is the composite oxide layer of silver, being fixed by fusion between two-layer, wherein the preparation method of the composite oxide layer of silver comprises the following steps:
(1) alloy melting, forms alloy melt by after the mixing of following mass percent through melting by Ag, Zn, La, Ti, wherein Zn be 5%, La be 1%, Ti be 5%, surplus is Ag；
(2) powder by atomization, makes alloy powder by alloy melt through the atomization of high-pressure atomization equipment；
(3) isostatic pressing ingot, is processed into embryo ingot by alloy powder by isostatic pressing ingot；
(4) sintering, is sintered embryo ingot in non-oxidative medium, and sintering temperature is 450 DEG C-600 DEG C and obtains alloy powder sintered ingot；
(5) through extruding, alloy powder sintered ingot is crushed to extrusion plate；
(6) internal oxidition, prepares described money base composite oxides electric contact material by the sheet material that step (5) prepares by internal oxidation；
In described step (1), smelting temperature is 600 DEG C-800 DEG C；
Described step (2) powder by atomization is gas-atomized powder, and wherein aerosolization pressure is at 10MPa-15MPa；
Hydrostatic pressure in described step (3) controls at 100MPa-150MP；
In described step (4), non-oxidative medium is vacuum or nitrogen atmosphere；
Extrusion temperature in described step (5) 500 DEG C-700 DEG C, extrusion ratio >=80；
In described step (6), internal oxidation process condition controls: pure oxygen pressure 0.5-1MPa, temperature 500-700 DEG C；
In described AgW30 layer, the weight/mass percentage composition of silver is 70%, and the weight/mass percentage composition of W is 30%。
2. the money base composite oxides electric contact material according to claim 1 application in the production process of relay。
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| CN110391095B (en) * | 2019-08-23 | 2020-08-14 | 浙江大学 | Single-side internal silver oxide tin oxide indium oxide electric contact material and preparation method thereof |
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| DE2143844C3 (en) * | 1971-09-01 | 1979-09-13 | Siemens Ag, 1000 Berlin U. 8000 Muenchen | Process for the production of two-layer contact pieces as a molded part |
| JPS54149322A (en) * | 1978-05-17 | 1979-11-22 | Tanaka Precious Metal Ind | Electric contact material |
| CN101609755B (en) * | 2009-07-08 | 2012-07-25 | 中南大学 | Preparation method of silver-metallic oxide electrical contact material |
| CN102312119B (en) * | 2010-06-29 | 2013-07-10 | 福达合金材料股份有限公司 | Preparation method for silver tin oxide electrical contact material |
| CN102290261B (en) * | 2011-05-27 | 2014-04-09 | 张树堂 | Silver copper based metal oxide electrical contact material containing adding elements and preparation method thereof |
| CN103035419A (en) * | 2012-11-30 | 2013-04-10 | 浙江帕特尼触头有限公司 | Silver-and copper-based composite contact materials |
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