Experimental Report on the Damage of Machineries by Fire

Abstract

In each test, several kinds of material test pieces and machine parts were tested and the total numbers were about 72. A small size of turret-lathe, was tested also. We have observed the damages in quality and dimension, the strains, the heating temperature etc. by the fire flame, radiation heat and by the fire-extinguishing water. For temperature measurements, 12 thermocouples, 11 seger cones (798°～1200°C), 3 thermopaints (350°～450°C) and 5 tempalags (510°～899°C) were used. Max. room-temperature were 630°～880°C., max. articles-temperature 593°～704°C and the room-temperature >500°C were kept for about 10～13 minutes.
In our fire-test the iron and steel castings, steel forgings and rolled steel materials were least damaged and can be considered the possibility of resurrection with a little working-up, but the heat-treated articles such as springs, tools, ball bearings, and the non-ferrous materials were largely damaged in the quality and dimension. Particularly it is necessary to pay attention to prevent the corrosion increase on the iron and steel parts of the machinery after the fire.