Transactions . n annealing to 800° C in a closed pot, the real grains are formed,but are still of microscopic dimensions (see Fig. 4). In order to determinethe temperature at which the larger grains begin to form, that is, suchas can be readily discerned by the unaided eye, eight samples, varyingin thickness from to in., were annealed in hydrogen for 3 850° C, cooled over night, and then polished and etched with concen-trated nitric acid. There was no change in structure. This was reptat 920°, 960°, 1,000°, 1,050°, and 1,100° C. Samples more than began to show
Transactions . n annealing to 800° C in a closed pot, the real grains are formed,but are still of microscopic dimensions (see Fig. 4). In order to determinethe temperature at which the larger grains begin to form, that is, suchas can be readily discerned by the unaided eye, eight samples, varyingin thickness from to in., were annealed in hydrogen for 3 850° C, cooled over night, and then polished and etched with concen-trated nitric acid. There was no change in structure. This was reptat 920°, 960°, 1,000°, 1,050°, and 1,100° C. Samples more than began to show slight grain growth at 1,050° C, while the showed quite large sized grains (see Fig. 5). Above this tem-perature the large grains did not show any visible change, but the smallergrains grew until the entire remaining field was occupied by large equi-axed grains. These grains, once formed, could not be changed by anyheat treatment short of actual fusion. GRAIN GROWTH IN SILICON STEEL. 573.
Size: 3112px × 803px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
