| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem in which a powder slag film of a powder for ingot making used for an ingot making method is firmly adhered and remains on a casting piece surface, for eliminating a powder slag film removal work, thereby facilitate a work step and prevent rolling defect in a rolling step.SOLUTION: The powder for ingot making is characterized in that, after it is heated at 1300°C for 10 minutes and then cooled to room temperature, calcium oxide crystal or die calcium silicate crystal or both of them are precipitated as crystal phases in a cooled and melted powder slag. |
