Wilbert Smith Archives Files Box 1131 19 1131-19-p082

Document Text (OCR)

The microstructure is predominantly austenitic grains with carbides, presumably cementite, in the grains occurring as needles, with fairly large amounts of pearlite, as shown in Figure B and at higher magnification in Figure C. For industrial use, the steel is quenched after being austenized, in order to retain only austenite, which would make the steel magnetic, but if the steel is cooled very slowly carbides and grain boundary precipitation, pearlite in this case, occurs and magnetic...