What are the carbide brazing furnaces?
Common carbide brazing furnaces are of the following types:
1. Vacuum brazing furnace
- **Working principle**: In a vacuum environment, the furnace is heated by heating elements to melt the brazing material in a vacuum state and wet the carbide and the base material to complete the brazing process. It can effectively avoid oxidation and impurity pollution and improve welding quality.
- **Structural composition**:
- **Vacuum system**: including vacuum pumps, vacuum valves, vacuum gauges, etc., used to extract air in the furnace and maintain vacuum.
- **Heating system**: such as resistance wire heating, molybdenum belt heating, graphite heating, etc., to provide the required temperature for brazing.
- **Cooling system**: Water cooling, air cooling or air cooling can be used to accelerate the cooling of weldments.
- **Electronic control system**: Accurately control parameters such as furnace temperature, vacuum, heating time, etc.
- **Features and applications**: The quality of the welding joint is high, suitable for brazing of carbide tools, molds, etc. with strict requirements on welding quality. For example, the brazing of carbide parts in the aerospace field.
2. Continuous brazing furnace
- **Working principle**: The workpiece enters the furnace continuously through the conveying device, and passes through the preheating zone, brazing zone, cooling zone, etc. in turn to achieve continuous production.
- **Structural composition**:
- **Conveying system**: Such as mesh belt conveyor, chain conveyor, etc., to ensure the smooth transportation of workpieces.
- **Heating zone**: It is composed of multiple heating units to ensure uniform temperature in the furnace.
- **Cooling zone**: The welded workpiece is quickly cooled by air cooling, water cooling, etc.
- **Features and applications**: High production efficiency, suitable for large-scale batch production of cemented carbide parts. Commonly used for brazing of cemented carbide connectors in industries such as automobile manufacturing and electronic equipment production.
3. Box brazing furnace
- **Working principle**: Put the cemented carbide workpiece to be brazed into the box furnace, and heat and braze after closing the furnace door.
- **Structural composition**:
- **Box**: It has good thermal insulation and sealing properties, reducing heat loss and outside air entry.
- **Heating elements**: distributed around or at the bottom of the furnace to ensure uniform temperature inside the furnace.
- **Temperature control system**: accurately controls the temperature inside the furnace to ensure the accuracy of the brazing temperature.
- **Features and applications**: simple to operate, suitable for small batch and multi-variety cemented carbide brazing production. It can be used for experimental brazing or small batch production of cemented carbide in scientific research units, small processing plants, etc.
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