HIGH STRENGTH STEEL SHEET FOR HIGH HEAT INPUT WELDING

To provide a high strength steel sheet for high heat input welding based on new guidelines on component design.SOLUTION: A high strength steel sheet for high heat input welding contains, in mass%, C: 0.08-0.14%, Mn: 0.3-1.0%, Ni: 2.5-7.0%, Al: 0.03-0.100%, Cu: 0-2.0%, Cr: 0-2.0%, Mo: 0-2.0%, Nb: 0-0...

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Hauptverfasser:	HONMA RYUICHI, FURUKAWA HIROTSUGU, URAKAWA TOMOKI, TAKAHIRA NOBUYUKI, SHINOHARA YASUHIRO, OTOMATSU YUKI, WATABE YOSHIYUKI
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS METALLURGY TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Zusammenfassung:	To provide a high strength steel sheet for high heat input welding based on new guidelines on component design.SOLUTION: A high strength steel sheet for high heat input welding contains, in mass%, C: 0.08-0.14%, Mn: 0.3-1.0%, Ni: 2.5-7.0%, Al: 0.03-0.100%, Cu: 0-2.0%, Cr: 0-2.0%, Mo: 0-2.0%, Nb: 0-0.03%, V: 0-0.10%, W: 0-1.0%, Ti: 0-0.020%, B: 0-0.0050%, Ca: 0-0.005%, Mg: 0-0.005%, REM: 0-0.005%, and Zr: 0-0.005%, quenching magnification DI(inch) of 17-35, carbon equivalent CeqWES of 0.600%-0.900%, and carbon equivalent CeqIIW of 0.750%-1.100%.SELECTED DRAWING: None 【課題】新たな成分設計の指針に基づいて、大入熱溶接用高強度鋼板を提供する。【解決手段】本発明の大入熱溶接用高強度鋼板は、質量％で、Ｃ：０．０８〜０．１４％、Ｍｎ：０．３〜１．０％、Ｎｉ：２．５〜７．０％、Ａｌ：０．０３〜０．１００％、Ｃｕ：０〜２．０％、Ｃｒ：０〜２．０％、Ｍｏ：０〜２．０％、Ｎｂ：０〜０．０３％、Ｖ：０〜０．１０％、Ｗ：０〜１．０％、Ｔｉ：０〜０．０２０％、Ｂ：０〜０．００５０％、Ｃａ：０〜０．００５％、Ｍｇ：０〜０．００５％、ＲＥＭ：０〜０．００５％、Ｚｒ：０〜０．００５％、を含有し、焼入れ倍数ＤＩ（ｉｎｃｈ）が１７〜３５であり、炭素当量ＣｅｑＷＥＳが０．６００％〜０．９００％であり、炭素当量ＣｅｑＩＩＷが０．７５０％〜１．１００％である。【選択図】なし