Before each swaging operation, the middlecase is refired to a temperature of 1100°C so as to temporarily reduce the hardness of the steel from 250 to 170 vickers.
Before each swaging operation, the middlecase is refired to a temperature of 1100°C so as to temporarily reduce the hardness of the steel from 250 to 170 vickers.
每道冲压工序开始前，需将表壳胚件重新加热到摄氏1,100度，以便暂时将表壳材质的硬度从华氏250度降低至到170度。