LOW-CRACK-SENSITIVITY AND LOW-YIELD-RATIO ULTRA-THICK STEEL PLATE AND PREPARATION METHOD THEREFOR

The invention relates to an ultra-heavy steel plate with low cracking sensitivity and low yield ratio, the mass percentages of chemical components of the steel plate are C 0.05-0.09; Si 0.2-0.4; Mn 1.3-1.6; Al 0.02-0.04; Nb 0.03-0.08; V 0.03-0.08; Cr 0.1-0.5; Ni 0.1-0.5; Mo 0.1-0.3; Cu 0.2-0.5; Ti 0...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	HU, Jianguo, LI, Jingtao, WU, Xiaolin, SHI, Ailai, ZHAO, Fu, XU, Feng, SUN, Xianjin, GAO, Zhuzhong, FANG, Shouyu, MIAO, Pifeng
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS TREATMENT OF ALLOYS OR NON-FERROUS METALS
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	The invention relates to an ultra-heavy steel plate with low cracking sensitivity and low yield ratio, the mass percentages of chemical components of the steel plate are C 0.05-0.09; Si 0.2-0.4; Mn 1.3-1.6; Al 0.02-0.04; Nb 0.03-0.08; V 0.03-0.08; Cr 0.1-0.5; Ni 0.1-0.5; Mo 0.1-0.3; Cu 0.2-0.5; Ti 0.01-0.02; P¤0.015; S¤0.003; N¤0.007, the balance being Fe and inevitable impurities; the carbon equivalent is ¤0.43, the cold cracking sensitivity coefficient Pcm is ¤0.20. A low cracking sensitivity and low yield ratio steel plate with a thickness of 40-70 mm is manufactured by the process steps of KR molten iron pretreatment - converter smelting - LF refining - RH vacuum degassing - continuous casting - lid-covering slow cooling for the continuous casting slabs - casting slabs heating - controlled rolling - controlled cooling - hot straightening - air cooling and so on.