STEEL FOR MACHINE STRUCTURE

STEEL FOR MACHINE STRUCTURE

PROBLEM TO BE SOLVED: To provide steel for a machine structure having excellent surface hardening treatment characteristics including carburizing and quenching properties, cold workability, machinability and fatigue resistance. SOLUTION: (1) The steel for a machine structure has a composition contai...

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Bibliographische Detailangaben
Hauptverfasser: HORIMOTO MASAYUKI, ARAI TAKATOSHI, SATO TAKESHI, MATSUMOTO HITOSHI, SUZUKI DAISUKE
Format: Patent
Sprache:eng
Schlagworte:
ALLOYS
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide steel for a machine structure having excellent surface hardening treatment characteristics including carburizing and quenching properties, cold workability, machinability and fatigue resistance. SOLUTION: (1) The steel for a machine structure has a composition containing 0.10 to =0. Further, the maximum diameter of the equivalent circle of inclusions expressed by (πLW/4)0.5 when the cumulative distribution function estimated by extremum statistical treatment with the length of the inclusions in the longitudinal cross-sectional face in the longitudinal direction as L (μm), and the breadth as W (μm) is 99% is