Densification and sintering method of arc extinguishing nozzle of high voltage circuit breaker and arc extinguishing nozzle of high voltage circuit breaker
A technology of high-voltage circuit breakers and arc extinguishing nozzles, which is applied in the direction of circuits, electrical components, and electrical switches, and can solve the problems of reducing the mechanical and electrical properties of materials, large internal voids in materials, and gas that cannot be discharged in time to reach the sintering temperature and time optimization, improving mechanical and electrical properties, and improving breaking performance
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Embodiment 1
[0024] The high-voltage circuit breaker arc extinguishing nozzle densification sintering method in this embodiment includes the following steps:
[0025] 1) Put the blank of the arc extinguishing nozzle of the high-voltage circuit breaker into the vacuum sintering furnace, set the vacuum degree to 3Pa, raise the temperature to 300°C at a heating rate of 5°C / min, and keep it warm for 8h;
[0026] 2) Raise the temperature to 350°C at a heating rate of 5°C / min, and keep it warm for 5 hours;
[0027] 3) Cool down to 300°C at a cooling rate of 5°C / min, hold for 8 hours, then cool down to 150°C at a cooling rate of 5°C / min, and cool to room temperature with the furnace to obtain the product.
[0028] The blank of the arc extinguishing nozzle of the high-voltage circuit breaker in this embodiment is made of the following components in weight percentage: 3% of aluminum oxide, 20% of boron nitride, 0.1% of molybdenum disulfide, and the balance is polytetrafluoroethylene.
[0029] The ...
Embodiment 2
[0031] The high-voltage circuit breaker arc extinguishing nozzle densification sintering method in this embodiment includes the following steps:
[0032] 1) Put the arc-extinguishing nozzle blank of the high-voltage circuit breaker into the vacuum sintering furnace, set the vacuum degree to 12Pa, raise the temperature to 330°C at a heating rate of 10°C / min, and keep it warm for 12h;
[0033] 2) Raise the temperature to 370°C at a heating rate of 10°C / min, and keep it warm for 8 hours;
[0034] 3) Cool down to 330°C at a cooling rate of 10°C / min, keep warm for 12 hours, then cool down to 150°C at a cooling rate of 10°C / min, and cool to room temperature with the furnace.
[0035] The blank of the arc extinguishing nozzle of the high-voltage circuit breaker in this embodiment is made of the following components in weight percentage: 20% of aluminum oxide, 3% of boron nitride, 1% of molybdenum disulfide, and the balance is polytetrafluoroethylene.
[0036] The arc extinguishing n...
Embodiment 3
[0038] The high-voltage circuit breaker arc extinguishing nozzle densification sintering method in this embodiment includes the following steps:
[0039] 1) Put the blank of the arc extinguishing nozzle of the high-voltage circuit breaker into the vacuum sintering furnace, set the vacuum degree to 5Pa, raise the temperature to 320°C at a heating rate of 8°C / min, and keep it warm for 10h;
[0040] 2) Raise the temperature to 360°C at a heating rate of 8°C / min, and keep it warm for 6 hours;
[0041] 3) Cool down to 320°C at a cooling rate of 8°C / min, keep warm for 10 hours, then cool down to 150°C at a cooling rate of 8°C / min, and cool to room temperature with the furnace to obtain the product.
[0042] The blank of the arc extinguishing nozzle of the high-voltage circuit breaker in this embodiment is made of the following components in weight percentage: 10% of aluminum oxide, 10% of boron nitride, 0.5% of molybdenum disulfide, and the balance is polytetrafluoroethylene.
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Abstract
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