We have developed a lead-free, free-machining 0.1 - 0.8 % C steel for machine structural use, which demonstrates machinability, almost equivalent to lead-containing free-machining steels. This free-maching steel is characterized by controlling the sulfide shape by Ca-Al deoxidation and, unlike conventional Ca-deoxidized steels and Al-deoxidized CaS free-machining steels, its machinability is improved with the aid of manganese-calcium sulphides which precipitate wrapping calcium-aluminate oxides. In order that these duplex inclusions generate, it is essential that the activity balance between /O/ and /S/ be controlled to 15 < aS/aO < 100. The free-machining steel which satisfies this activity balance has an outstanding machinability and fatigue strength, which are equivalent to lead containing steels. It has been under consideration to apply this novel free-machining steel to automotive parts such as crank shafts and connecting rods.


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    Titel :

    Development of nonleaded free machining steel for automotive parts


    Weitere Titelangaben:

    Entwicklung eines bleifreien Automatenstahls für Kraftfahrzeuge


    Beteiligte:
    Kano, T. (Autor:in) / Kurebayashi, Y. (Autor:in) / Tsugui, K. (Autor:in)


    Erscheinungsdatum :

    2002


    Format / Umfang :

    7 Seiten, 19 Bilder, 4 Tabellen, 4 Quellen




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Development of Nonleaded Free Machining Steel for Automotive Parts

    Tsugui, Keisuke / Kano, Takashi / Kurebayashi, Yutaka | SAE Technical Papers | 2002


    Development of nonleaded free machining steel for automotive parts

    Kano,T. / Kurebayashi,Y. / Tsugui,K. et al. | Kraftfahrwesen | 2002


    2002-01-1001 Development of Nonleaded Free Machining Steel for Automotive Parts

    Kano, T. / Kurebayashi, Y. / Tsugui, K. et al. | British Library Conference Proceedings | 2002



    Machining automotive engine parts

    Murphy, A. | Engineering Index Backfile | 1926