Metallurgy; an introduction to the study of physical metallurgy . a large extent inferred. The slowly-cooled alloys of concentration lying between thepoint D and the hne BJ should consist, according to thediagram, of crystals of cementite embedded in pearlite. Thiscementite, while not primarily formed by crystallisation fromthe molten metal, is derived from the euteotio which formsalong the line DB, and also from the soHd 7-iron solution whichhas formed the primary crystallisation, but which, during therange of cooling from DB to IJ, has rejected some of thecementite which it originally held i
Metallurgy; an introduction to the study of physical metallurgy . a large extent inferred. The slowly-cooled alloys of concentration lying between thepoint D and the hne BJ should consist, according to thediagram, of crystals of cementite embedded in pearlite. Thiscementite, while not primarily formed by crystallisation fromthe molten metal, is derived from the euteotio which formsalong the line DB, and also from the soHd 7-iron solution whichhas formed the primary crystallisation, but which, during therange of cooling from DB to IJ, has rejected some of thecementite which it originally held in solution. The cementitethus rejected from the soUd solution would, with moderaterates of coohng, aggregate itself about the cementite crystalsof the eutectic in such a way that these would grow at theexpense of the crystals and lamellae of the solid solution. Whatfinally remained of this soUd solution would decompose at thetemperature of the line IJ, and the cementite of the alloy wouldthus be surrounded by pearlite. This structure is not often met PLATE Pig. 76. Pig.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectmetals, bookyear1922
