HOT-ROLLED WIRE

• Main Authors: MASUDA TOMOKAZU, YOSHIHARA NAO, TAKAYAMA SHO
• Format: Patent
• Language: English; Korean
• Published: 15.11.2016
• Subjects: 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

고강도이고, 내SSC성이 우수한 열간 압연 선재를 제공한다.　질량%로, C: 0.20∼0.5%, Si: 0.05∼0.3%, Mn: 0.3∼1.5%, Al: 0.001∼0.1%, P: 0% 초과 0.01% 이하, 및 S: 0% 초과 0.01% 이하를 함유하고, 잔부가 철 및 불가피 불순물로 이루어지는 열간 압연 선재이며, 해당 열간 압연 선재에 포함되는 S량을 전자선 마이크로애널라이저를 이용해서 200μm 간격으로 300개소 이상 측정하고, S량의 평균값 S(질량%)에 대한 S량의 최대값 S(질량%)를 편석도(S/S)로 했을 때, 해당 편석도가 30 이하인 열간 압연 선재. The present invention provides a hot rolled wire rod having high strength and excellent SSC resistance. Disclosed is a hot rolled wire rod including, in percent by mass: C: 0.20 to 0.5%, Si: 0.05 to 0.3%, Mn: 0.3 to 1.5%, Al: 0.001 to 0.1%, P: exceeding 0% and 0.01% or less, and S: exceeding 0% and 0.01% or less, with the balance being iron and inevitable impurities. When the sulfur content in the hot rolled wire rod is measured at 300 sites or more at intervals of 200 µm using an electron beam microanalyzer, a segregation ratio (S max /S ave ) is 30 or less, where a segregation ratio is defined as a ratio of the maximum sulfur content S max (% by mass) to an average sulfur content S ave (% by mass).