The invention provides a YF928A
alloy steel process for a high-magnetic permeability, high-strength and fatigue-resistant rotating shaft. The method comprises the following steps: performing
smelting preparation, baking furnace charge,
alloy material and auxiliary material according to corresponding processes; then charging after
lime is placed on the furnace bottom of an electric furnace, sending
electricity to melt, and after the furnace charge is fully melted, sampling and analysis are performed after stirring, degassing, removal of inclusions and composition adjustment are performed according to the analysis result, and then steel is mixed and punched out with
slag; after the
molten steel is put into a tank and smelted by an LF
smelting process, the
molten steel enters a VOD
smelting process, the
oxygen blowing amount is controlled by the VOD
smelting process to perform carbon deoxidation, then
lime,
fluorite, Al block, Si-Ca and Si-Fe are added for reduction, and after
slag melting, electrochemical
alloy is sent, sampling is fully analyzed, sample return fine adjustment is performed, then
casting is performed, and after the cast steel
ingot is formed, the steel
ingot is annealed; after the steel
ingot is annealed by an annealing process,
forging heating is performed, and forgings are forged by a 5000T press.