FUNDAMENTALS OF METAL CASTING

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Achieving Directional Solidification •Desired directional solidification is achieved using Chvorinov's Rule to design the casting itself, its orientation in the mold, and the riser system that feeds it •Locate sections of the casting with lower V/A ratios away from riser, so freezing occurs first in these regions, and the liquid metal supply for the rest of the casting remains open •Chills - internal or external heat sinks that cause rapid freezing in certain regions of the casting ©2002 John Wiley & Sons, Inc. M. P. Groover, “Fundamentals of Modern Manufacturing 2/e”
Figure 10.9 - (a) External chill to encourage rapid freezing of the molten metal in a thin section of the casting; and (b) the likely result if the external chill were not used ©2002 John Wiley & Sons, Inc. M. P. Groover, “Fundamentals of Modern Manufacturing 2/e”
Page 1 and 2: FUNDAMENTALS OF METAL CASTING •Ov
Page 3 and 4: Figure 10.1 - Classification of sol
Page 5 and 6: Capabilities and Advantages of Cast
Page 7 and 8: Parts Made by Casting •Big parts:
Page 9 and 10: The Mold in Casting •Contains cav
Page 11 and 12: Two Categories of Casting Process 1
Page 13 and 14: Figure 10.2 (b) Sand casting mold
Page 15 and 16: Forming the Mold Cavity •Mold cav
Page 17 and 18: Gating System Channel through which
Page 19 and 20: Heating the Metal • Heating furna
Page 21 and 22: Solidification of Metals Transforma
Page 23 and 24: Solidification of Pure Metals •Du
Page 25 and 26: Most alloys freeze over a temperatu
Page 27 and 28: •Solidification takes time Solidi
Page 29 and 30: Mold Constant in Chvorinov's Rule
Page 31 and 32: Figure 10.8 - Shrinkage of a cylind
Page 33 and 34: Solidification Shrinkage •Occurs
Page 35: Directional Solidification •To mi

FUNDAMENTALS OF METAL CASTING

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