| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To decrease oxide-based inclusions while keeping a specification range for a component of a steel material as much as possible. <P>SOLUTION: In a process of manufacturing a high-cleanliness steel by melting a steel material 5 with an electron beam 2, this manufacturing method includes controlling the [C] in the steel material 5 to 0.03 mass% or more, an electric power supplied to the electron beam 2 to 4-10 kWh/kg by an electric power consumption rate, a degree of vacuum in melting to 1×10<SP>-3</SP>Torr or less, and the value of the electric power consumption rate/surface area of molten steel to 0.015 kWh/kg×cm<SP>2</SP>or more, when melting the steel material 5 with the electron beam 2. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
