. Transactions. Fig. 20.—Tike-Steel, 60 Diameters. Fig. 23.—Troostite and 50 Fig. 21.—Cementite and Pearlite. Fig. 24.—Lementite and 60 Diameters. Magnified 250 Diameters. THE MICROSTRUCTUKE OF IRON AND STEEL. 503 nothing but fine-grained austenite. On cooling down again,the ferrite separates out as before; but now it is confined tovery small grains of austenite, and hence the resulting structureis fine. Fig. 5 shows the same steel heated to 850° C. and thusrefined. It is not uncommon to find that such a treatment has notcom
. Transactions. Fig. 20.—Tike-Steel, 60 Diameters. Fig. 23.—Troostite and 50 Fig. 21.—Cementite and Pearlite. Fig. 24.—Lementite and 60 Diameters. Magnified 250 Diameters. THE MICROSTRUCTUKE OF IRON AND STEEL. 503 nothing but fine-grained austenite. On cooling down again,the ferrite separates out as before; but now it is confined tovery small grains of austenite, and hence the resulting structureis fine. Fig. 5 shows the same steel heated to 850° C. and thusrefined. It is not uncommon to find that such a treatment has notcompletely refined a specimen. The reason lies in the pres-ence of globules and films of MnS or oxides, which often assume ai/f ?
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
