| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat treatment vessel prevented from damage caused by change of configuration due to thermal shock.SOLUTION: A heat treatment vessel 1 is a tank type heat treatment vessel includes a planar bottom part 2, and an upright planar wall part 3 formed all along the circumference of peripheral edge portion of the bottom part. At least a part of the wall part is formed to have shape protruding toward the inside of the tank type heat treatment vessel. Additionally, the wall part is formed to have shape protruding toward the inside of the heat treatment vessel in a cross section parallel to the bottom part. |
