Optimal selection of electromagnetic heating parameters in hot-drawing process of large gas headers

In the hot-drawing process of large gas headers, the selection of heating parameters affects the distribution of final temperature, so rational heating parameters are favorable for determining the range of subsequent optimal drawing force so as to effectively prohibit deficiencies generating in the process of drawing. Based on the principle of electromagnetic heating, the pipe was simulated and analysed in the software ANSYS by changing the parameters of power frequency, current and heating time. Then, the temperature distribution data was obtained and the theoretically reasonable range of heating parameters was determined. It is shown that based on parameter combination of power frequency 5 kHz, current 500 A and heating time 50-60 s, the final heating temperature can be above 900 ℃, meeting the technological requirements of hot-drawing process. It is verified by the electromagnetic heating test that the actual heating effect is consistent with the simulation result.