Metallurgy; an introduction to the study of physical metallurgy . Fig. 137. Pig. Pig. 139. Pig. 140. [Toface p. 323. DEFECTS IN METALS AND ALLOYS 323 {b) Excessively high casting temperature, leading to unduly slowcooling, coarse structure and liability to segregation (see p. 287). (c) Too low a casting temperature, leading to incomplete filling of the mould, cold shuts and similar defects. (d) Inadequate cleaning or skimming of the molten metal, leading to the admixture of slag or dross. (e) Admixture of foreign matter from the mould, such as particles of sand, gas bubbles, etc. These d
Metallurgy; an introduction to the study of physical metallurgy . Fig. 137. Pig. Pig. 139. Pig. 140. [Toface p. 323. DEFECTS IN METALS AND ALLOYS 323 {b) Excessively high casting temperature, leading to unduly slowcooling, coarse structure and liability to segregation (see p. 287). (c) Too low a casting temperature, leading to incomplete filling of the mould, cold shuts and similar defects. (d) Inadequate cleaning or skimming of the molten metal, leading to the admixture of slag or dross. (e) Admixture of foreign matter from the mould, such as particles of sand, gas bubbles, etc. These defects are due to bad moulds,insufficient drying, inadequate venting, or to unduly vigorouspouring of the metal resulting in the disintegration of the surfaceof the mould. The correct design of the pattern to suit themetal employed also plays a part in this connection. (/) Errors in the design of the pattern or the mould leading to draw-ing, unsoundness and shrinkage cracks (see p. 292). Here,again, the adaptation of the pattern to the nature and peculiari-ties of the metal employe
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectmetals, bookyear1922
