| 摘要 |
<p>A high carbon steel wire rod characterized in that it has a total oxygen amount of 15 to 50 ppm, and a number of non-sticky inclusions in non-metal inclusions observed in the visual field under a microscope of 1.5 pieces/mm2 or less on average, wherein the non-sticky inclusions contain those having the following composition A in an amount of 20 number % or more and those having the following composition A or B in an amount of 80 number % or more, and the non-sticky inclusions having the following composition A have a thickness of 40 νm or less, Composition A: SiO¿2?: more than 70 %, Composition B: SiO2: 25 to 75 %, MnO: 8 to 30 %, MgO: 40 % or less, Al2O3: 35 % or less, CaO: 25 % or less, and TiO2: 6 % or less, with the proviso that the sum of Al2O3 and MgO is 5 % or more and the sum of CaO and TiO2 is 2 % or more. The high carbon steel wire rod can be used for producing a high carbon steel wire rod being significantly excellent in the drawability and fatigue resistance after wire drawing with the use of a reduced amount of an expensive alloy.</p> |
