| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an alloying treatment device of a hot-dip galvanized steel sheet which controls uneven alloying generated when performing alloying treatment of the hot-dip galvanized steel sheet using alloyed steel, such as with Si or Mn. <P>SOLUTION: The alloying treatment device of a hot-dip galvanized steel sheet includes: a temperature measuring means (T1) which is provided at the downstream side of an alloying zone (3) and is not affected by surface emissivity of the steel sheet; and a radiation thermometer (T2) which measures at least 3 points in the sheet width direction at the upstream and downstream sides of the temperature measuring means which is not affected by surface emissivity of the steel sheet. <P>COPYRIGHT: (C)2013,JPO&INPIT |
