PARTS WITH A BAINITIC STRUCTURE HAVING HIGH STRENGTH PROPERTIES AND MANUFACTURING PROCESS

PARTS WITH A BAINITIC STRUCTURE HAVING HIGH STRENGTH PROPERTIES AND MANUFACTURING PROCESS

The present invention provides a part having a composition including, with the contents being expressed in weight-percent, 0.10≤C≤0.30, 1.6≤Mn≤2.1, 0.5≤Cr≤1.7, 0.5≤Si≤1.0, 0.065≤Nb≤0.15, 0.0010≤B≤0.0050, 0.0010≤N≤0.0130, 0≤Al≤0.060, 0≤Mo≤1.00, 0≤Ni≤1.0, 0.01≤Ti≤0.07, 0≤V≤0.3, 0≤P≤0.050, 0.01≤S≤0.1,...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: PERROT-SIMONETTA, MARIE-THÉRÈSE, VOLL, ULRICH, RESIAK, BERNARD
Format: Patent
Sprache:eng ; pol
Schlagworte:
ALLOYS
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:The present invention provides a part having a composition including, with the contents being expressed in weight-percent, 0.10≤C≤0.30, 1.6≤Mn≤2.1, 0.5≤Cr≤1.7, 0.5≤Si≤1.0, 0.065≤Nb≤0.15, 0.0010≤B≤0.0050, 0.0010≤N≤0.0130, 0≤Al≤0.060, 0≤Mo≤1.00, 0≤Ni≤1.0, 0.01≤Ti≤0.07, 0≤V≤0.3, 0≤P≤0.050, 0.01≤S≤0.1, 0≤Cu≤0.5, 0≤Sn≤0.1. A balance of the composition includes iron and unavoidable impurities resulting from the production method. The microstructure includes, in surface proportions, from 100% to 70% bainite, less than 30% residual austenite, and less than 5% ferrite. A manufacturing method is also provided.