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Metal Casting. By Tanner Powell. Overview of Casting. Net or near net One of the most utilized production methods Many different types of casting named for mold types. The Function of Casting.

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metal casting

Metal Casting

By Tanner Powell

overview of casting
Overview of Casting
  • Net or near net
  • One of the most utilized production methods
  • Many different types of casting named for mold types
the function of casting
The Function of Casting
  • To control the size, shape, composition, and crystalline arrangement of metal products in order to achieve the desired functionality.

Iron, carbon, tungsten, vanadium, cobalt, chromium, sulfur alloy know as a

Micro-Melt Maxamet Alloy

temperature control
Temperature Control
  • Casting methods include ways to heat and cool specific areas of the mold at different rates.
  • Purpose of temperature control is to regulate filling and cooling rates.
  • A number of casting defects are caused by fast cooling rates
  • Grain size is also related

to cooling rate. Faster

rates yield larger grain sizes.

  • Larger grain sizes usually

result in lower densities.

heat treatments
Heat Treatments
  • Different methods of hardening can be implemented to exploit the effects of cooling rate on grain structure.
  • Annealing is one most common method where a metal piece is heated to crystallization temperature. At which time crystal structures are allowed to reorient themselves. Depending on the cooling rate, the crystals may form any number of arrangements and sizes.
  • Grain structure has very noticeable effects many different properties of the final product.
  • Not only harness, ductility, and density, but also conductivity, magnetism and reactivity are effected.
references
References
  • Second Page Image http://crswnew.cartech.com/wnew/techarticles/TA00029.html
  • Third Page Image http://www.hoben.co.uk/ industrialcasting/
  • Annealing of Casting; http://www.key-to-steel.com/Articles/Art16.htm
  • Last figure; http://www.msm.cam.ac.uk/Teaching/ mat1b/courseA/lecture3-5.pdf