STEEL STRIP FOR ELECTRIC-RESISTANCE-WELDED STEEL PIPE OR TUBE ELECTRIC-RESISTANCE-WELDED STEEL PIPE OR TUBE AND PROCESS FOR PRODUCING STEEL STRIP FOR ELECTRIC-RESISTANCE-WELDED STEEL PIPE OR TUBE

X70 급 이상의 강도를 가짐과 함께, 매우 우수한 내 HIC 성과 내 SSC 성을 구비하는 전기 저항 용접 강관용 강대를 제공한다. 질량％ 로, C : 0.02 ∼ 0.06 ％, Si : 0.1 ∼ 0.3 ％, Mn : 0.8 ∼ 1.3 ％, P : 0.01 ％ 이하, S : 0.001 ％ 이하, V : 0.04 ∼ 0.07 ％, Nb : 0.04 ∼ 0.07 ％, Ti : 0.01 ∼ 0.04 ％, Cu : 0.1 ∼ 0.3 ％, Ni : 0.1 ∼ 0.3 ％, Ca : 0.001 ∼ 0.005 ％, Al : 0.01 ∼ 0.0...

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Bibliographische Detailangaben
1. Verfasser:	MATSUKI YASUHIRO
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	ALLOYS CHEMISTRY CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING FERROUS OR NON-FERROUS ALLOYS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS MACHINE TOOLS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS PERFORMING OPERATIONS SOLDERING OR UNSOLDERING TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS WELDING WORKING BY LASER BEAM
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Zusammenfassung:	X70 급 이상의 강도를 가짐과 함께, 매우 우수한 내 HIC 성과 내 SSC 성을 구비하는 전기 저항 용접 강관용 강대를 제공한다. 질량％ 로, C : 0.02 ∼ 0.06 ％, Si : 0.1 ∼ 0.3 ％, Mn : 0.8 ∼ 1.3 ％, P : 0.01 ％ 이하, S : 0.001 ％ 이하, V : 0.04 ∼ 0.07 ％, Nb : 0.04 ∼ 0.07 ％, Ti : 0.01 ∼ 0.04 ％, Cu : 0.1 ∼ 0.3 ％, Ni : 0.1 ∼ 0.3 ％, Ca : 0.001 ∼ 0.005 ％, Al : 0.01 ∼ 0.07 ％, N : 0.007 ％ 이하, 잔부 Fe 및 불가피적 불순물로 이루어지고, 또한, C, Nb, V 및 Ti 의 함유량이 하기 (1) 식을 만족시키는 성분 조성을 갖고, 페라이트 면적률이 90 ％ 이상인 전기 저항 용접 강관용 강대. [C] － 12([Nb]/92.9 ＋ [V]/50.9 ＋ [Ti]/47.9) ≤ 0.03 ％ ... (1) A steel strip for an electric-resistance-welded steel pipe or tube having a strength of X70 grade or more and excellent HIC resistance and SSC resistance is provided. A steel strip for an electric-resistance-welded steel pipe or tube has a chemical composition containing, in mass%: C: 0.02% to 0.06%; Si: 0.1% to 0.3%; Mn: 0.8% to 1.3%; P: 0.01% or less; S: 0.001% or less; V: 0.04% to 0.07%; Nb: 0.04% to 0.07%; Ti: 0.01% to 0.04%; Cu: 0.1% to 0.3%; Ni: 0.1% to 0.3%; Ca: 0.001% to 0.005%; Al: 0.01% to 0.07%; and N: 0.007% or less, with a balance being Fe and incidental impurities, contents of C, Nb, V, and Ti satisfying the following Expression (1) C 12 Nb / 92.9 + V / 50.9 + Ti / 47.9 ¤ 0.03 % wherein a ferrite area ratio is 90% or more.