HOT ROLLED STEEL SHEET FOR GROUND REINFORCEMENT AND STEEL PIPE FOR GROUND REINFORCEMENT HAVING EXELLENT STRENGTH AND FORMABILITY AND METHOD OF MANUFACTURING THEREOF

• Main Authors: PARK KYONG SU, KIM HAK JUN, SEO SEOK JONG, KWON YUN IK
• Format: Patent
• Language: English; Korean
• Published: 23.06.2023
• Subjects: ALLOYS; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL; 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; MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; PERFORMING OPERATIONS; PUNCHING METAL; ROLLING OF METAL; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The present invention relates to a hot rolled steel sheet and a steel pipe for ground reinforcement with excellent strength and formability, and methods for manufacturing the same. The hot rolled steel sheet for ground reinforcement of the present invention includes, in wt%, 0.05-0.1 % of C, 0.1 % or less (excluding 0 %) of Si, 1.5-1.9 % of Mn, 0.05-0.15 % of Ti, 0.03-0.1 % of Nb, 0.03-0.1 % of Mo, 0.02 % or less (excluding 0 %) of P, 0.02 % or less (excluding 0 %) of S, 0.01 % or less (excluding 0 %) of N, and the remainder of Fe and inevitable impurities. 본 발명은 강도 및 성형성이 우수한 지반보강용 열연강판 및 강관과 이들의 제조방법에 관한 것이다.