CN1255564C - Copper base metal-ceramic material for electric switch contactor - Google Patents
Copper base metal-ceramic material for electric switch contactor Download PDFInfo
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- CN1255564C CN1255564C CN 02132898 CN02132898A CN1255564C CN 1255564 C CN1255564 C CN 1255564C CN 02132898 CN02132898 CN 02132898 CN 02132898 A CN02132898 A CN 02132898A CN 1255564 C CN1255564 C CN 1255564C
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Abstract
The present invention relates to a copper base cermet material used for producing the switch contact heads of appliances, which belongs to the technical field of electric materials. The copper base cermet material is designed to solve the problems of the consumption of a large number of rare precious metals, the badness of electric arc ablation resistance, the lowness of the hardness, the badness of welding resistance and the lowness of mechanical strength. The copper base cermet material is prepared from the components by the following proportion: 0.01 to 1.0 of diamond micro powder, 0.5 to 2.0 of cadmium, 0.05 to 0.5 of boron nitride, 0.1 to 4.0 of vanadium, 0.2 to 3.0 of niobium, 0.2 to 3.0 of molybdenum, 0.2 to 1.0 of chromium, copper as the rest, and the total amount of refractory metals including the vanadium, the niobium, the molybdenum and the chromium is 10%. The manufacturing process comprises the following steps: the materials are mixed in a powder mixer for 1 to 1.2 hours, and the mixture is pressed into a blank by using steel moulds at the pressure of 3 to 5 KPa; the blank is sintered at a sintering temperature of 800 to 1000 DEGC in a shielding gas atmosphere, and in order to improve the density of the material, the sintered blank is repressed under the condition of the pressure of 10 to 15 KPa; the sintered blank is treated by annealing under the condition of the temperature of 400 to 600 DEG C in order to eliminate stresses and optimize structures. The copper base cermet material of the present invention has the advantages of ablation resistance, welding resistance, high interface bonding force, simple process and low cost.
Description
Technical field: the present invention relates to a kind of copper base metal-ceramic material, belong to the electrical material technical field as electric appliance switch contact.
Background technology: well-known: most of low-voltage apparatus contact materials all are precious metals, particularly silver-base alloy or matrix material alloy, although silver-based material can guarantee the good military service characteristic of contact and the reliable operation of electrical equipment, caused the mass consumption of rare precious metal; Joint silver and band silver contact should be saved silver, guarantee the quality of material again, simultaneously cheap again, this just makes people begin to attempt replacing silver with copper, copper has many superior physical propertys as contact material, and is all higher as indexs such as thermal conductivity, electroconductibility, thermal capacitance, fusing point, boiling point, the latent heat of fusion and gasification latent heats; In existing contact material, copper also is a basic interpolation group, and a kind of copper-base contact material has been arranged now, but the creep rupture strength level of this material is not high, splash is arranged and form the whisker phenomenon to occur, and causes contact at heavy loading (AC
4) contact takes place to damage fast after the cyclical operation in several cycles under the condition, this mainly is because golden Gang stone particle is relatively poor with the wettability between the copper matrix, the result makes the reliability reduction of device for switching.
Summary of the invention: for solving the problem development and production that mass consumption, arc ablation resistance are bad, hardness is low, resistance fusion welding is poor, physical strength is low of rare precious metal, (wt%) is as follows for composition of the present invention, proportioning: diadust: 0.01-1.0, cadmium: 0.5-2.0, boron nitride: 0.05-0.5, vanadium: 0.1-4.0, niobium: 0.2-3.0, molybdenum: 0.2-3.0, chromium: 0.2-1.0, copper: surplus, refractory metal vanadium, niobium, molybdenum, chromium total content:＜10%; Make with following manufacture craft: the above-mentioned materials powder is contained according to a certain ratio got; in mixed powder machine, mixed 1-1.2 hour then; with steel mould, pressure is that 3-5Kpa is pressed into blank; in being 800-1000 ℃ protective atmosphere, sintering temperature carries out sintering; for improving density of material; being to carry out multiple pressure under the condition of 10-15Kpa at pressure, is that annealing is made the copper base metal-ceramic material as electric appliance switch contact to eliminate stress and to optimize tissue under 400-600 ℃ the condition in temperature at last.
The present invention has following beneficial effect, advantage and performance index:
1, the metallic element of composition has high melt point, boiling point, the latent heat of fusion and the latent heat of vaporization, thereby has improved the anti-ablative and resistance fusion welding of material.
2, owing to contain the copper sosoloid and the diamond particles interface of chromium carbonization taking place, interface binding power is improved, has formed higher interface bond strength, thereby the intensity of material under the effect of loop cycle load is improved greatly; Also find the NbCr that forms in the metallurgical process simultaneously
2The dispersion-strengthened action of intermetallic compound particles has improved the intensity of material.
3, under certain heating condition, chromium has higher resistance of oxidation, and therefore, it is little to the influence of material contact resistance to add chromium.
4, add the solid solubility of elemental chromium in solid phase copper and support, therefore little to the specific conductivity influence, the intensity of matrix is but played strengthening effect, improved the hardness of matrix; In addition, the interaction of chromium and niobium can make its solid solubility each other lower, thereby has improved the specific conductivity of pseudoalloy, and can subtract the superfluous plasticity of falling material to a certain extent.
5, this is under the prerequisite that does not reduce contact material military service performance, and other constituent element of suitable interpolation also can reduce the comparatively content of expensive diamond, vanadium and niobium of price.
6, utilize the prepared contact members performance index that go out of the present invention: density is 8.3-8.8gcm
3Hardness is HB=750-850MPa; Resistivity is 2.3-3.0 μ Ω .cm.
7, except that above-mentioned advantage, because diamond content reduces in the material of the present invention, make contact need not add weld overlay, have the beneficial effect of having simplified technological process, having reduced material cost and technology cost.
Embodiment:
Copper base metal-ceramic material as electric appliance switch contact; by diadust; cadmium; boron nitride; vanadium; niobium; molybdenum; chromium; copper is formed; it is as follows to get each component content (wt%): diadust: 0.50; cadmium: 1.50; boron nitride: 0.40; vanadium: 3.10; niobium: 2.50; molybdenum: 2.50; chromium: 0.90; copper: surplus 88.60; the refractory metal vanadium; niobium; molybdenum; chromium total content:＜10%; be 9.00 herein; make with following manufacture craft: above-mentioned materials was mixed 1 hour in mixed powder machine; use steel mould; pressure is that 4Kpa is pressed into blank; in being 1000 ℃ protective atmosphere, sintering temperature carries out sintering; for improving density of material; be that blank carries out multiple pressure behind the following sintering of condition of 14Kpa at pressure; be that annealing is made the copper base metal-ceramic material as electric appliance switch contact to eliminate stress and to optimize tissue under 500 ℃ the condition at last in temperature.
The contact standard specimen of contact members of preparing as stated above and standard carries out the contrast experiment on the special test platform, during contact surface temperature rise and contact drop detailed data were listed in the table below under the test nominal current conditions, the contrast sample was represented with X.
The contact standard specimen surface temperature rise of contact members and standard and contact drop data contrast sample table
| No | Add composition % (wt) | T ℃ of temperature rise Δ | Pressure drop Δ U mV | |||
| Cd | C (diamond) | Nb | Cr | |||
| 1 | 0.4 | 2.0 | 8.0 | 0.5 | 58.6 | 80.7 |
| 2 | 1.2 | 0.1 | 6.0 | 0.3 | 46.2 | 64 |
| 3 | 1.4 | 0.2 | 4.0 | 0.7 | 38.9 | 53 |
| 4 | 1.9 | 0.5 | 2.0 | 1.0 | 41.3 | 60 |
| 5 | 2.8 | 1.0 | 1.0 | 0.2 | 47.3 | 68 |
| 6 | 3.6 | 0.01 | 0.5 | 0.4 | 47.0 | 69 |
| X | 1.1 | 1.0 | - | - | 62.0 | 102 |
Test conditions satisfies international GB14048-93.Experimental prototype adopts the CJT1-40 alternating current contactor, and the temperature rise value of being tested is the difference of contact temperature and envrionment temperature, and institute's galvanization is rated current Ie=40A; Test-results in the table is the mean value of the 6-12 of energising mensuration after 5 hours to the contact temperature rise value; Experimental result shows, uses the electrical equipment of material of the present invention to satisfy GB14048-93 low-voltage apparatus standard and other relevant criterion fully, shows the military service stable performance during contact is on probation, and the creep rupture strength height has guaranteed the reliability of electrical equipment.
By the table in as seen, the contact drop of military service contact surface (being contact resistance) is very low, temperature rise value is also very low, switches on after 30-60 minute, data value is promptly stable in the table, after experimentation in remain unchanged always.
Claims (1)
1, a kind of copper base metal-ceramic material as electric appliance switch contact, form by diadust, cadmium, boron nitride, vanadium, niobium, molybdenum, chromium, copper, it is characterized in that: the each component content range is as follows, by weight percentage: diadust: 0.01-1.0, cadmium: 0.5-2.0, boron nitride: 0.05-0.5, vanadium: 0.1-4.0, niobium: 0.2-3.0, molybdenum: 0.2-3.0, chromium: 0.2-1.0, copper: surplus, refractory metal vanadium, niobium, molybdenum, chromium total content:＜10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02132898 CN1255564C (en) | 2002-09-07 | 2002-09-07 | Copper base metal-ceramic material for electric switch contactor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02132898 CN1255564C (en) | 2002-09-07 | 2002-09-07 | Copper base metal-ceramic material for electric switch contactor |
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| CN1408888A CN1408888A (en) | 2003-04-09 |
| CN1255564C true CN1255564C (en) | 2006-05-10 |
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| CN 02132898 Expired - Fee Related CN1255564C (en) | 2002-09-07 | 2002-09-07 | Copper base metal-ceramic material for electric switch contactor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110747366A (en) * | 2019-11-21 | 2020-02-04 | 谷文伟 | Composite nano oxide modified copper-zirconium alloy electrical contact material and preparation method thereof |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101139515B (en) * | 2007-05-18 | 2010-08-18 | 中南大学 | High heat-conductive diamond-copper composite encapsulating material and method for making same |
| CN105861872A (en) * | 2016-06-16 | 2016-08-17 | 成都工业学院 | Carbon nanotube reinforced copper-based composite material and preparation method thereof |
| CN108265193A (en) * | 2017-12-21 | 2018-07-10 | 柳州科瑞科技有限公司 | A kind of refractory metal ceramic mold and preparation method thereof |
| CN110504120B (en) * | 2019-08-31 | 2021-03-30 | 陕西斯瑞新材料股份有限公司 | Low-cost copper-chromium composite contact preparation method |
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2002
- 2002-09-07 CN CN 02132898 patent/CN1255564C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110747366A (en) * | 2019-11-21 | 2020-02-04 | 谷文伟 | Composite nano oxide modified copper-zirconium alloy electrical contact material and preparation method thereof |
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| CN1408888A (en) | 2003-04-09 |
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