Method of manufacture of a flat product in the zirconium alloy or an alloy of hafnium, comprising a continuation of the hot rolling after heating by infrared and its uses .

摘要

The method concerns prodn. of a sheet or a strip alloyed with zirconium or hafnium, and includes hot redn. from an ingot and subsequent rolling in the alpha domain in several passes with one or several reheats in a furnace, followed by cold-rolling. The method is characterised by the fact that hot-rolling after the last reheat in the furnace is followed by reheating of the resultant strip 92) by - 100 deg C. and at a rate more than 4 deg C./by infrared means (1) with a radiation wavelength between 0.8 and 5 m, and that hot-rolling is continued until the final strip thickness is = or equal to 0.8 times the thickness of the strip (2).