first aspect of the process aims to roughly shape the ingot any conventional methods for shaping ingots can be employed to produce the article to be subjected to the second aspect in which the article is finished and provided with the desired magnetic properties in the second aspect the alloy article shaped as mentioned above is treated in accordance with the following three steps of the present invention the article is at first heated at a temperature not lower than 1000 u00b0 c and below the solidus hereinafter referred to as a solution temperature to subject it to a solution treatment if the solution temperature is below 1000 u00b0 c it is not possible to sufficiently soften the article which has been hardened due to the preceding workings and thus the plastic workability of the article can not be restored if the solution temperature is too low magnetic properties in addition to the plastic workability deteriorate the article heated at the solution temperature is then cooled to ambient temperature in a manner such that the article is quenched starting from a temperature not lower than 800 u00b0 c and ending at a temperature of 500 u00b0 c at the highest the quenching herein used is thus the immersion into a liquid or molten medium having a temperature 500 u00b0 c at the highest for example water brine a liquid inert gas and even a salt bath when the.