CN114107726A - Magnesium-enhanced tungsten-copper electrical contact material and preparation method thereof - Google Patents
Magnesium-enhanced tungsten-copper electrical contact material and preparation method thereof Download PDFInfo
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- CN114107726A CN114107726A CN202111473142.6A CN202111473142A CN114107726A CN 114107726 A CN114107726 A CN 114107726A CN 202111473142 A CN202111473142 A CN 202111473142A CN 114107726 A CN114107726 A CN 114107726A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
- C23C4/08—Metallic material containing only metal elements
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/131—Wire arc spraying
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/02—Contacts characterised by the material thereof
- H01H1/021—Composite material
- H01H1/025—Composite material having copper as the basic material
Abstract
The invention provides a magnesium-enhanced tungsten-copper electrical contact material, which comprises a tungsten-copper alloy layer and a magnesium element, wherein the magnesium element is added into the tungsten-copper alloy layer to form an enhanced tungsten-copper alloy layer. A preparation method of a magnesium-reinforced tungsten-copper electrical contact material comprises the following steps: 1. ball-milling and mixing tungsten powder, copper powder and magnesium powder according to a certain proportion in a vacuum atmosphere to form mixed powder; 2. coating the mixed powder with a red copper sheet to prepare a flux-cored wire; 3. and depositing a flux-cored wire on the surface of the steel substrate to form an enhanced tungsten-copper alloy layer. The magnesium-enhanced tungsten-copper electrical contact material prepared by the method has high density, strong arc ablation resistance and high bonding strength with the substrate, and the method has high material utilization rate, is convenient for automatic batch production, and has important significance for preparing high-performance electrical contact materials.
Description
Technical Field
The invention relates to a magnesium-reinforced tungsten-copper electrical contact material and a preparation method thereof, belonging to the technical field of material preparation.
Background
The high-voltage switch is a junction of a power grid, the connection and disconnection of the power grid are realized by the switch, and the main component for implementing the important function is an electrical contact; the tungsten-copper alloy has good arc ablation resistance, is a key material of a switch arc contact of a capacitor group for an extra-high voltage system, and is also widely applied to occasions such as a high-temperature-resistant throat insert of a rocket nozzle, an electromagnetic ejection guide rail and the like.
When the electrical contact is switched on and switched off each time in the working process, electric arcs are generated among the electrical contacts, the electric arcs generate a large amount of heat to partially melt the material of the electrical contacts, and when the material of the electrical contacts is greatly lost in the repeated ablation process, the electrical contacts can lose efficacy; therefore, the electric arc ablation resistance of the electric contact alloy layer is an important index of the electric contact performance, and the poor ablation resistance can cause frequent replacement of the electric contact and increase the cost; therefore, it is very important to further improve the arc erosion resistance of the tungsten copper electrical contact.
Disclosure of Invention
The invention provides a magnesium-reinforced tungsten-copper electrical contact material and a preparation method thereof, aiming at improving the arc ablation resistance of a tungsten-copper electrical contact.
The technical solution of the invention is as follows: the magnesium reinforced tungsten-copper electric contact material consists of tungsten-copper alloy layer and magnesium element to form reinforced tungsten-copper alloy layer.
Further, the composition of the enhanced tungsten-copper alloy layer comprises: w (tungsten), Mg (magnesium), Cu (copper).
Further, the composition of the enhanced tungsten-copper alloy layer comprises: w, Mg, Cu, Fe (iron).
Further, the components of the enhanced tungsten-copper alloy layer are as follows: 25-35% of W and 3-5% of Mg; the percentage of each component is mass percentage.
Further, the components of the enhanced tungsten-copper alloy layer are as follows: 25-35% of W, 3-5% of Mg, 2-4% of Fe and the balance of Cu, wherein the sum of the percentages of the components is 100%, and the percentages are mass percentages.
A preparation method of a magnesium-reinforced tungsten-copper electrical contact material comprises the following steps:
1. ball-milling and mixing tungsten powder, copper powder and magnesium powder according to a certain proportion in a vacuum atmosphere to form mixed powder;
2. coating the mixed powder with a red copper sheet to prepare a flux-cored wire;
3. and depositing a flux-cored wire on the surface of the steel substrate to form an enhanced tungsten-copper alloy layer.
Further, the preparation method of the magnesium reinforced tungsten-copper electrical contact material further comprises the step of cleaning the steel substrate material before the step 3.
Further, the tungsten-copper alloy layer is deposited on the surface of the steel substrate, and specifically, the enhanced tungsten-copper alloy layer is deposited on the surface of the steel substrate through an arc deposition mode.
Further, during the arc deposition, the welding current is 100A-200A, the welding voltage is 10V-25V, the welding speed is 15 mm/min-25 mm/min, and the swing amplitude is 5 mm-10 mm.
Further, the thickness of the steel substrate in the step 3 is 2mm-3 mm.
Furthermore, the steel substrate is made of low-carbon steel, and the carbon content of the steel substrate is 0.1-0.3 wt%.
The invention has the beneficial effects that:
1) the electric contact is manufactured by arc deposition of the flux-cored wire on the steel substrate, so that the production efficiency and the material utilization rate are high;
2) the magnesium-enhanced tungsten-copper alloy layer has high density and strong arc ablation resistance, the relative density can reach 98.9 percent at most, the mass loss caused by arc ablation can be reduced by more than 42.4 percent, and the arc ablation loss can be reduced from 1.91mg to 1.1mg in example 5;
3) the addition of magnesium greatly enhances the arc ablation resistance of the tungsten-copper electrical contact, prolongs the service life of the electrical contact, and reduces the maintenance cost and the material cost;
4) the magnesium-enhanced tungsten-copper electrical contact material prepared by the method has high density, strong arc ablation resistance and high bonding strength with the substrate, and the method has high material utilization rate, is convenient for automatic batch production, and has important significance for preparing high-performance electrical contact materials.
Drawings
Figure 1 is a schematic diagram of an arc ablation process.
Detailed Description
The magnesium-reinforced tungsten-copper electrical contact material structurally comprises a steel substrate and a magnesium-containing reinforced tungsten-copper alloy layer, wherein the magnesium-containing reinforced tungsten-copper alloy layer is cladded on the surface of the steel substrate through arc deposition, the width-direction joint surface of the steel substrate and the magnesium-containing reinforced tungsten-copper alloy layer is a plane, and the thickness of the tungsten-copper alloy layer is 2mm-3 mm; the magnesium-enhanced tungsten-copper electrical contact material has the arc erosion resistance which is remarkably improved, and compared with an unreinforced tungsten-copper electrical contact with similar components, the arc burning loss of a sample with the same size can be reduced by 20-50 percent, such as the arc burning loss in example 5 can be reduced from 1.91mg to 1.1 mg; according to the invention, the magnesium element is added into the tungsten-copper alloy layer, so that the density of the tungsten-copper alloy layer is improved, and the arc ablation resistance of the tungsten-copper alloy layer is enhanced.
The magnesium-containing enhanced tungsten-copper alloy layer comprises the following components, by weight, 25-wt-35 wt% of W, 3-wt-5 wt% of Mg, 2-wt-4 wt% of Fe, and the balance of Cu; the steel substrate is made of low-carbon steel, and the carbon content is 0.1-0.3 wt%.
The magnesium-reinforced tungsten-copper electrical contact material is suitable for preparing a tungsten-copper electrical contact with high arc ablation resistance.
A preparation method of a magnesium-reinforced tungsten-copper electrical contact material comprises the following steps:
step 1, ball-milling and mixing tungsten powder, copper powder and magnesium powder in a vacuum atmosphere according to a certain proportion;
step 2, coating the mixed powder by using a red copper sheet to prepare a flux-cored wire;
step 3, cleaning the steel substrate material;
step 4, mounting the flux-cored wire obtained in the step 2 on a welding robot, and depositing a magnesium-containing enhanced tungsten-copper alloy layer on the surface of a steel substrate in an arc deposition mode; the flux-cored wire is melted into molten drops under the action of electric arc, the molten drops are dropped on the surface of the steel substrate, the surface of the steel substrate is partially melted, the molten drops and the molten drops form a molten pool together, and the molten pool is cooled and solidified under protective atmosphere to form the magnesium-reinforced tungsten-copper electrical contact material.
The reinforced tungsten-copper alloy layer comprises the following components: w25-25 wt-35 wt%, Mg3 wt-5 wt%, Fe2 wt-4 wt%, and the balance of Cu, wherein the total of the components is 100%, and the content is in weight ratio.
In the step 4: the welding current is 100A-200A, the welding voltage is 10V-25V, the welding speed is 15 mm/min-25 mm/min, and the swing amplitude of the flux-cored wire is 5 mm-10 mm during arc deposition.
In the step 4: the protective atmosphere during arc deposition is argon, and the flow of the argon is 15-20L/min.
And 3, the thickness of the steel substrate in the step 3 is 2-3 mm.
The steel substrate is made of low-carbon steel, and the carbon content of the steel substrate is 0.1-0.3 wt%.
The principle of the invention is as follows: in the process of arc deposition, a flux-cored wire is melted into molten drops under the action of arc heat, meanwhile, a substrate steel substrate surface layer is partially melted under the action of the arc heat, the flux-cored wire and the substrate steel substrate surface layer form a molten pool, the molten pool contains magnesium, tungsten and copper from the wire and iron in a substrate, the molten pool forms a four-phase structure comprising a tungsten phase, a solid-solution copper phase and an iron phase after being solidified under a protective atmosphere, and the mass fractions of the four phases are respectively: 25-35 wt% of W, 3-3 wt-5 wt% of Mg, 2-4 wt% of Fe and the balance of Cu; the addition of magnesium can greatly enhance the arc ablation resistance of the tungsten-copper electrical contact, and is mainly realized from the following three aspects: (1) in the process of preparing the tungsten-copper alloy by arc deposition, the molten welding wire and the melted part of the surface layer of the substrate jointly form a liquid molten pool, air in the molten pool is consumed by Mg reaction in the components, air holes are reduced, oxygen MgO is generated, and the structure of a contact material is more compact; (2) tungsten powder particles and generated MgO particles can enable liquid copper to generate a capillary effect in the arc ablation process, so that the liquid copper can be prevented from flowing and overflowing and the vaporization and volatilization of the liquid copper can be reduced; (3) although the melting point of MgO is as high as 2800 ℃, the MgO has strong volatilization before reaching the melting point; according to the Callziuss-Clarpron equation, the average evaporation latent heat of MgO between 1800K and 2200K is calculated to be 125 kcal/mol, and the corresponding evaporation latent heat of copper is about 76 kcal/mol, so that under the action of electric arc, the Mg-enhanced tungsten-copper electrical contact material has the volatilization action of magnesium oxide besides the gasification and volatilization of copper, and the volatilization of magnesium oxide not only reduces the loss of copper, but also plays a role in absorbing larger electric arc energy, thereby reducing the electric arc temperature and greatly improving the ablation condition of the material under the electric arc.
Examples
The technical solution of the present invention is further described in detail with reference to the accompanying drawings and examples.
Example 1
(1) Wrapping the mixed metal powder into a flux-cored welding wire rough blank by using a red copper sheet, and carrying out hot drawing on the welding wire rough blank to obtain a flux-cored welding wire with the diameter of 1.2 mm;
(2) pretreatment of a steel plate: selecting low-carbon steel with the carbon content of not more than 0.3wt%, the mark Q235, the wall thickness of 2mm, the length of 200mm and the width of 20mm, and carrying out oil removal treatment on the surface;
(3) after clamping and fixing the steel substrate, arc-depositing a copper alloy layer on the steel substrate through a welding robot; the welding wire and the surface layer of the steel substrate are melted under the action of high-temperature electric arc to form a molten pool, the welding wire and the surface layer of the steel substrate are melted, and metallurgical bonding is realized after the molten pool is solidified, so that the required tungsten-copper electrical contact material can be obtained; wherein the welding current is 100A, the welding voltage and the wire feeding speed are automatically matched with the welding current, the welding voltage is 10V, the welding speed is 15cm/min, and the swing amplitude is 5 mm; high-purity argon is used as protective gas, the gas flow is 18L/min, and the surface of the alloy is prevented from being oxidized in the deposition process; a sample was prepared in which the alloy layer had W25wt%, Mg3%, Fe2wt%, and Cu70 wt%.
Example 2
(1) Wrapping the mixed metal powder into a flux-cored welding wire rough blank by using a red copper sheet, and carrying out hot drawing on the welding wire rough blank to obtain a flux-cored welding wire with the diameter of 1.2 mm;
(2) pretreatment of a steel plate: selecting low-carbon steel with the carbon content of not more than 0.3wt%, the mark Q235, the wall thickness of 2mm, the length of 200mm and the width of 20mm, and carrying out oil removal treatment on the surface;
(3) after clamping and fixing the steel substrate, arc-depositing a copper alloy layer on the steel substrate through a welding robot; the welding wire and the surface layer of the steel substrate are melted under the action of high-temperature electric arc to form a molten pool, the welding wire and the surface layer of the steel substrate are melted, and metallurgical bonding is realized after the molten pool is solidified, so that the required tungsten-copper electrical contact material can be obtained; wherein the welding current is 120A, the welding voltage and the wire feeding speed are automatically matched with the welding current, the welding voltage is 15V, the welding speed is 15cm/min, and the swing amplitude is 5 mm; high-purity argon is used as protective gas, the gas flow is 18L/min, and the surface of the alloy is prevented from being oxidized in the deposition process; a sample with the alloy layer components of W30wt%, Mg 3.5%, Fe2wt% and Cu64.5wt% is prepared.
Example 3
(1) Wrapping the mixed metal powder into a flux-cored welding wire rough blank by using a red copper sheet, and carrying out hot drawing on the welding wire rough blank to obtain a flux-cored welding wire with the diameter of 1.2 mm;
(2) pretreatment of a steel plate: selecting low-carbon steel with the carbon content of not more than 0.3wt%, the mark Q235, the wall thickness of 2mm, the length of 200mm and the width of 20mm, and carrying out oil removal treatment on the surface;
(3) after clamping and fixing the steel substrate, arc-depositing a copper alloy layer on the steel substrate through a welding robot; the welding wire and the surface layer of the steel substrate are melted under the action of high-temperature electric arc to form a molten pool, the welding wire and the surface layer of the steel substrate are melted, and metallurgical bonding is realized after the molten pool is solidified, so that the required tungsten-copper electrical contact material can be obtained; wherein the welding current is 150A, the welding voltage and the wire feeding speed are automatically matched with the welding current, the welding voltage is 18V, the welding speed is 25cm/min, and the swing amplitude is 5 mm; high-purity argon is used as protective gas, the gas flow is 18L/min, and the surface of the alloy is prevented from being oxidized in the deposition process; a sample was prepared in which the alloy layer had W30wt%, Mg4%, Fe 3wt%, and Cu 63 wt%.
Example 4
(1) Wrapping the mixed metal powder into a flux-cored welding wire rough blank by using a red copper sheet, and carrying out hot drawing on the welding wire rough blank to obtain a flux-cored welding wire with the diameter of 1.2 mm;
(2) pretreatment of a steel plate: selecting low-carbon steel with the carbon content of not more than 0.3wt%, the mark Q235, the wall thickness of 2mm, the length of 200mm and the width of 20mm, and carrying out oil removal treatment on the surface;
(3) after clamping and fixing the steel substrate, arc-depositing a copper alloy layer on the steel substrate through a welding robot; the welding wire and the surface layer of the steel substrate are melted under the action of high-temperature electric arc to form a molten pool, the welding wire and the surface layer of the steel substrate are melted, and metallurgical bonding is realized after the molten pool is solidified, so that the required tungsten-copper electrical contact material can be obtained; wherein the welding current is 150A, the welding voltage and the wire feeding speed are automatically matched with the welding current, the welding voltage is 18V, the welding speed is 25cm/min, and the swing amplitude is 5 mm; high-purity argon is used as protective gas, the gas flow is 18L/min, and the surface of the alloy is prevented from being oxidized in the deposition process; a sample was prepared in which the alloy layer had a composition of W30wt%, Mg 4.5wt%, Fe 3wt%, and Cu 62.5 wt%.
Example 5
(1) Wrapping the mixed metal powder into a flux-cored welding wire rough blank by using a red copper sheet, and carrying out hot drawing on the welding wire rough blank to obtain a flux-cored welding wire with the diameter of 1.2 mm;
(2) pretreatment of a steel plate: selecting low-carbon steel with the carbon content of not more than 0.3wt%, the mark Q235, the wall thickness of 2mm, the length of 200mm and the width of 20mm, and carrying out oil removal treatment on the surface;
(3) after clamping and fixing the steel substrate, arc-depositing a copper alloy layer on the steel substrate through a welding robot; the welding wire and the surface layer of the steel substrate are melted under the action of high-temperature electric arc to form a molten pool, the welding wire and the surface layer of the steel substrate are melted, and metallurgical bonding is realized after the molten pool is solidified, so that the required tungsten-copper electrical contact material can be obtained; wherein the current is 200A, the voltage and the wire feeding speed are automatically matched with the current, the voltage is 25V, the welding speed is 25cm/min, and the swing amplitude is 5 mm; high-purity argon is used as protective gas, the gas flow is 18L/min, and the surface of the alloy is prevented from being oxidized in the deposition process; a sample was prepared in which the alloy layer had a composition of W35 wt%, Mg 5wt%, Fe 4wt%, and Cu 56 wt%.
Comparative example 1
(1) Wrapping the mixed metal powder into a flux-cored welding wire rough blank by using a red copper sheet, and carrying out hot drawing on the welding wire rough blank to obtain a flux-cored welding wire with the diameter of 1.2 mm;
(2) pretreatment of a steel plate: selecting low-carbon steel with the carbon content of not more than 0.3wt%, the mark Q235, the wall thickness of 2mm, the length of 200mm and the width of 20mm, and carrying out oil removal treatment on the surface;
(3) after clamping and fixing the steel substrate, arc-depositing a copper alloy layer on the steel substrate through a welding robot; the welding wire and the surface layer of the steel substrate are melted under the action of high-temperature electric arc to form a molten pool, the welding wire and the surface layer of the steel substrate are melted, and metallurgical bonding is realized after the molten pool is solidified, so that the required tungsten-copper electrical contact material can be obtained; wherein the current is 200A, the voltage and the wire feeding speed are automatically matched with the current, the voltage is 25V, the welding speed is 25cm/min, and the swing amplitude is 5 mm; high-purity argon is used as protective gas, the gas flow is 18L/min, and the surface of the alloy is prevented from being oxidized in the deposition process; samples with alloy layer compositions of W30wt% and Cu70wt% were prepared.
As shown in Table 1, as the Mg content increases, the burning loss of the alloy layer decreases, indicating that the arc ablation resistance is enhanced; however, the tensile strength of the alloy layer increases and then decreases with increasing Mg content, so that the Mg content must not be excessive and both strength and resistance to arc erosion should be achieved.
Claims (10)
1. The magnesium reinforced tungsten-copper electrical contact material is characterized by adding magnesium element into a tungsten-copper alloy layer to form a reinforced tungsten-copper alloy layer.
2. The magnesium-enhanced tungsten-copper electrical contact material as recited in claim 1, wherein the enhanced tungsten-copper alloy layer comprises: w, Mg, Cu.
3. The contact material of claim 2, wherein the composition of the enhanced tungsten-copper alloy layer further comprises: fe.
4. The magnesium-reinforced tungsten-copper electrical contact material as claimed in claim 2 or 3, wherein the composition of the reinforced tungsten-copper alloy layer is as follows: 25-35% of W and 3-5% of Mg; the percentage of each component is mass percentage.
5. The magnesium-reinforced tungsten-copper electrical contact material as recited in claim 3, wherein the composition of the reinforced tungsten-copper alloy layer is as follows: 25-35% of W, 3-5% of Mg, 2-4% of Fe and the balance of Cu, wherein the sum of the percentages of the components is 100%, and the percentages are mass percentages.
6. A preparation method of a magnesium-reinforced tungsten-copper electrical contact material is characterized by comprising the following steps:
1. ball-milling and mixing tungsten powder, copper powder and magnesium powder according to a certain proportion in a vacuum atmosphere to form mixed powder;
2. coating the mixed powder with a red copper sheet to prepare a flux-cored wire;
3. and depositing a flux-cored wire on the surface of the steel substrate to form an enhanced tungsten-copper alloy layer.
7. The method for preparing the magnesium-reinforced tungsten-copper electrical contact material as claimed in claim 6, further comprising cleaning the steel substrate material before step 3.
8. The method for preparing the magnesium-reinforced tungsten-copper electrical contact material as claimed in claim 6 or 7, wherein the step of depositing the tungsten-copper alloy layer on the surface of the steel substrate specifically comprises the step of depositing the reinforced tungsten-copper alloy layer on the surface of the steel substrate by means of arc deposition.
9. The method for preparing a magnesium-reinforced tungsten-copper electrical contact material according to claim 8, wherein during arc deposition, the welding current is 100A-200A, the welding voltage is 10V-25V, and the welding speed is 15 mm/min-25 mm/min.
10. The method for preparing the magnesium-reinforced tungsten-copper electrical contact material according to claim 6 or 7, wherein the thickness of the steel substrate in the step 3 is 2mm to 3 mm; the steel substrate is low-carbon steel, and the carbon content of the steel substrate is 0.1-0.3 wt%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115194146A (en) * | 2022-07-22 | 2022-10-18 | 合肥综合性国家科学中心能源研究院(安徽省能源实验室) | Functional gradient layer material suitable for fusion reactor tungsten and steel connection |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1059619A (en) * | 1991-09-11 | 1992-03-18 | 甘肃省机械科学研究院 | Composite copper-based non-silver electric contact material |
| WO2014136617A1 (en) * | 2013-03-05 | 2014-09-12 | 株式会社アライドマテリアル | Electrical contact and breaker |
| CN113718250A (en) * | 2021-09-02 | 2021-11-30 | 国网江苏省电力有限公司丹阳市供电分公司 | Method for manufacturing tungsten-copper electrical contact material |
-
2021
- 2021-12-06 CN CN202111473142.6A patent/CN114107726B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1059619A (en) * | 1991-09-11 | 1992-03-18 | 甘肃省机械科学研究院 | Composite copper-based non-silver electric contact material |
| WO2014136617A1 (en) * | 2013-03-05 | 2014-09-12 | 株式会社アライドマテリアル | Electrical contact and breaker |
| CN113718250A (en) * | 2021-09-02 | 2021-11-30 | 国网江苏省电力有限公司丹阳市供电分公司 | Method for manufacturing tungsten-copper electrical contact material |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115194146A (en) * | 2022-07-22 | 2022-10-18 | 合肥综合性国家科学中心能源研究院(安徽省能源实验室) | Functional gradient layer material suitable for fusion reactor tungsten and steel connection |
| CN115194146B (en) * | 2022-07-22 | 2023-11-17 | 合肥综合性国家科学中心能源研究院(安徽省能源实验室) | Functionally graded layer material suitable for fusion reactor tungsten and steel connection |
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