| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress deformation of a flat heat-treated material due to heat treatment by controlling the dipping direction of the material into a refrigerant liquid in a continuous quenching process such as heating and cooling of a flat material to be heat-treated using a conveyor such as a belt conveyor. <P>SOLUTION: The heat-treated material is dipped into the refrigerant liquid in such a direction that the cooling rate difference in a cross-section having the lowest resistance force to a bending moment acting on the material lessens, for example, so as to dip in the refrigerant liquid from the cross-sectional surface comprising the short and long sides when dipping a rectangular flat material to be heat-treated different in three side dimensions in the refrigerant liquid. <P>COPYRIGHT: (C)2012,JPO&INPIT |
