. Canadian foundryman (1918). ~~m io 30 to fd 80 TO 80 BO tooPerarutagt. NicJceLFIG. 2. an account of the many conflictingtheories which have been advanced toexplain why the hardness is thus increas-ed. Nevertheless, it will be advantageousbriefly to draw attention to one or twoof the more salient features in this con-nection, because they will make it more. C O-ZS 0-0 -016 T-O 1-99 1-t Percenlaye, Carbon. FIG. 4—NICKEL STEELS. Fe(C, distributed throughout the mass ofiron. When this mixture is heated nophysical change occurs until a tempera-ture of 700 deg. C. is reached. At thattemperature, h
. Canadian foundryman (1918). ~~m io 30 to fd 80 TO 80 BO tooPerarutagt. NicJceLFIG. 2. an account of the many conflictingtheories which have been advanced toexplain why the hardness is thus increas-ed. Nevertheless, it will be advantageousbriefly to draw attention to one or twoof the more salient features in this con-nection, because they will make it more. C O-ZS 0-0 -016 T-O 1-99 1-t Percenlaye, Carbon. FIG. 4—NICKEL STEELS. Fe(C, distributed throughout the mass ofiron. When this mixture is heated nophysical change occurs until a tempera-ture of 700 deg. C. is reached. At thattemperature, however, what were pre-viously independent crystals of the com-pound Fe.,C, and iron, cease to exist, thecarbide is dissolved by the iron. Thischange is accompanied by an evolutionof heat. The action of the above constituent insteel, when heated to 700 deg. C, is inmany respects similar to that of the twosolids, ice and salt, when they arebrought into contact at a temperatureabove minus 21 deg. C. The only dif-ference being that in the latter instancethe solution which is formed is liquid,whilst in the former it is solid. In botncases the original constituents can beseparated from solution by cooling whenthe latent heat of solution is again givenout. Before carbon steel can be hardened D>quenching it must be heated to andquenched from a temperatu
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Keywords: ., bookcentury1900, bookdecade1910, booksubjec, booksubjectfoundries
