Ferritic stainless steel containing sulfur for ferromagnetic parts

摘要

Ferritic stainless steel for ferromagnetic component production comprises (in weight %): carbon ≤ 0.030, silicon 1.0-3; manganese 0.1-0.5, chromium 10-13, nickel 0- 1, sulfur 0.03- 0.5, phosphorus 0-0.030, molybdenum 0.2-2; copper 0-0.5; nitrogen 0-0.030; titanium 0-0.5; niobium 0-1; aluminum 0-100 x 10<-4>, calcium ( 30-100) x 10<-4>; and O ( 50-150) x 10<-4>. The Ca/O ratio is 0.3-1. Preferred Features: The steel includes calcium silico-aluminate of the type anorthite and/or pseudo-wollastonite and/or gehlenite, associated with chromium and manganese sulfide-type inclusions. Preferably, the steel contains (in weight %) 1.5-2 silicon, 11.8-13 chromium, sulfur 0.10-0.5 (most preferably, 0.10-0.3), 0.4-1 molybdenum, and less than 0.3 manganese. An Independent claim is given for the production of a component formed from the ferritic steel. After hot rolling and cooling, the steel is subjected to drawing, either after optional thermal annealing treatment or without thermal annealing treatment. The drawn steel can be finally submitted to complementary recrystallization annealing, to improve the magnetic properties of the component.