Pulse current-assisted hot-forming of light metal alloy

Pulse current-assisted hot-forming (PCAHF) of light metal alloy is developed due to lower energy consumption and higher efficiency. In this process, the metal sheet is designed in series in a pulse current circuit and heated directly by the pulse current. In addition, the ceramics mold is employed to avoid the heating current leaking. The Ti-6Al-4 V sheets are employed to improve the temperature distribution of the heated light metal alloy sheet. The effects of effective current density on the temperature and the rate of increase in temperature are studied by the pulse current heating experiment, and the effect of duty ratio on the forming property is studied by the forming experiments. Moreover, some light metal samples with different shapes are formed by the method of PCAHF. As the results, the hot forming with the merits of high-efficiency and low-energy consumption becomes possible.

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