A free-machining, lead-free steel with shape-controlled sulfide inclusions developed in Japan provides almost equivalent machinability, and equivalent or higher fatigue strength for rocker arms and crankshafts, compared with leaded steels. It also has superior chip-breakability. The inclusions in this steel have a core-and-shell structure consisting of oxides (CaO-Al2O3) and sulfides (Ca,Mn)S. The steel provides tool life four times greater than that of lead-containing free-machining steel.
Free-machining lead-free steel made for automobile parts
Advanced Materials & Processes ; 162 , 7 ; 33
2004
1 Seite
Aufsatz (Zeitschrift)
Englisch
Stahl , Fahrzeugbauteil , Fahrzeugausrüstung , Spanbarkeit , mechanische Festigkeit , Materialermüdung , Metallbearbeitung , Kalk , Aluminiumoxid , Schwefelverbindung , Schmieden , Einschlussstruktur , Sulfideinschluss , Oxideinschluss , Calciumoxid , Mangansulfid , Calciumsulfid , Werkzeugstahl , Japan , Bearbeitbarkeit
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