SI-KILLED STEEL WIRE ROD HAVING EXCELLENT FATIGUE PROPERTIES, AND SPRING USING SAME
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Dec 24, 2015
app pub date -
Jan 15, 2014
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Jan 15, 2013
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This Si-killed steel wire rod has Si-killed steel which contains specific chemical components that contain, as 80% or more of the number of inclusions, specific CaO—Al2O3—SiO2 inclusions, wherein the average composition of the MnO—Al2O3—SiO2 inclusions that satisfies the following (3A) satisfies the following (3B). (3A) If CaO+Al2O3+SiO2+MgO+MnO serves as the 100% standard, MnO+Al2O3+SiO2≧80%, MnO>CaO. (3B) When CaO+Al2O3+SiO2+MgO+MnO serves as the 100% standard, MnO: 10 to 70%, Al2O3: 3 to 50%, SiO2: 20 to 75%.
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