High-Frequency Tube Welding
High-frequency pipe welding is a fast, continuous process for longitudinal seam welding of metal pipes. It uses induction or contact heating and is especially suitable for pipe production.
Physicochemical Mechanism of Action
High-frequency pipe welding uses rapid heating by high-frequency currents to weld metal pipes. The frequencies are in the kHz range and enable uniform heat transfer along the pipe.
Metallurgical Relevance & Risks in Welding
This process is particularly suitable for pipe production because it allows fast heating and cooling times. However, too rapid cooling can lead to glass-hard martensite, causing cracks and brittleness. Uneven heat distribution can lead to porosity and weld defects.
Workshop Practice & Instructions
Use a frequency of at least 1 kHz for high-frequency pipe welding. Ensure that heating is evenly distributed over the pipe cross-section. Cool the pipe slowly to avoid porosity and reduce cracking. Continuously monitor temperature and cooling times.