HIGH TENSION STEEL PLATE EXCELLENT IN WORKABILITY IN PRESSING, ESPECIALLY, FORM FREEZING PROPERTY

PURPOSE:To obtain a titled high tension steel plate having a mixed structure in which an island-like structure containing martensite has been dispersed in a ferrite base, by regulating a surface roughness and a proportional limit stress by specifying a mean surface roughness Ha, and a PPI value, res...

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Bibliographische Detailangaben
Hauptverfasser:	NAKAZATO YOSHIO, HASHIGUCHI KOUICHI, SOEDA NAOHIKO, TANAKA TOMOO
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS METALLURGY TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain a titled high tension steel plate having a mixed structure in which an island-like structure containing martensite has been dispersed in a ferrite base, by regulating a surface roughness and a proportional limit stress by specifying a mean surface roughness Ha, and a PPI value, respectively. CONSTITUTION:A high tension steel plate which has such surface characteristics as specified by 0.4-1.8mum mean surface roughness Ha and >=80 (in a 0.5mum cut- off level) PPI value, and also has