LAGERSTAHL

In order to produce bearing steels of long life and high reliability with a higher probability by utilizing parameters for cleanness evaluation that are related to the shortest life of bearings, in the present invention, the logarithmic decrease in the cumulative size distribution of oxide-type nonm...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	ABE, TSUTOMU, CHIGASAKI, KANAGAWA, JP, NARAI, HIROSHI, FUJISAWA, KANAGAWA, JP, UEMURA, KAZUHIRO, FUJISAWA, KANAGAWA, JP
Format:	Patent
Sprache:	ger
Schlagworte:	ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING METALLURGY PHYSICS TESTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	In order to produce bearing steels of long life and high reliability with a higher probability by utilizing parameters for cleanness evaluation that are related to the shortest life of bearings, in the present invention, the logarithmic decrease in the cumulative size distribution of oxide-type nonmetallic inclusions and the estimated maximum diameter of inclusion particles present per unit volume or unit area are determined from the particle size distribution of the oxide-type nonmetallic inclusions, and the cleanness of interest is specified on the basis of said logarithmic decrease or said estimated maximum inclusion diameter.