1. The impact of ultra-low temperatures on electrofusion welding
Temperature range: Electrofusion welding generally requires an ambient temperature between -10°C and 40°C. In ultra-low temperature environments (such as below -10°C), welding efficiency may be reduced because heat dissipates faster at low temperatures, causing the welding process to take longer to reach the required temperature.
Welding quality: Low temperatures may affect the properties of welding materials, such as reduced viscosity of the flux, affecting the stability and quality of welding.
2. Countermeasures
Automatic temperature compensation: Modern electrofusion welding machines are generally equipped with an ambient temperature detection module that can automatically compensate for changes in ambient temperature. In low temperature environments, the equipment will automatically adjust the heating time and power to ensure welding quality.
Preheating measures: In ultra-low temperature environments, the welding parts can be preheated to reduce temperature differences and improve welding efficiency and quality.
Use special low-temperature equipment: In extreme low-temperature environments, it is recommended to use specially designed low-temperature welding equipment, which generally has better thermal insulation performance and temperature control capabilities.
3. Precautions in practical application
Clean the welding surface: In a low temperature environment, the welding surface is more likely to frost and slide, which makes welding difficult. Therefore, the welding surface must be thoroughly cleaned before welding to ensure that there are no impurities.
Control welding parameters: In a low temperature environment, the welding current, arc voltage and welding speed should be strictly controlled to avoid excessive welding line energy causing a decrease in the toughness of the welded joint.
Check the equipment status: In a low temperature environment, the temperature sensor and other key components of the welding equipment should be checked regularly to ensure their normal operation.
