18-09-2012, 05:34 PM
CASTING PROCESS
Casting Process....ppt (Size: 2.75 MB / Downloads: 158)
Turbine Blades for Jet Engines
Turbine blades for jet engines, manufactured by three different methods: (a) conventionally cast; (b) directionally solidified, with columnar grains, as can be seen from the vertical streaks; and © single crystal. Although more expensive, single crystal blades have properties at high temperatures that are superior to those to those of other blades. Source: Courtesy of United Technology Pratt and Whitney.
Casting Process
Advantages
any intricate shape can be cast
any ferrous or non ferrous metals & alloys are castable
Tools required for casting molds are simple & inexpensive
Grains of a Two-Phase System
(a) Schematic illustration of grains, grain boundaries, and particles dispersed throughout the structure of a two-phase system, such as lead-copper alloy. The grains represent lead in a solid solution of copper, and the particles are lead as a second phase. (b) Schematic illustration of a two-phase system consisting of two sets of grains: dark and light. Dark and light grains have their own compositions and properties, respectively.
Steps in making Sand Casting
Pattern making
Core making
Molding
Melting and pouring
Cleaning of the cast products
Casting Process....ppt (Size: 2.75 MB / Downloads: 158)
Turbine Blades for Jet Engines
Turbine blades for jet engines, manufactured by three different methods: (a) conventionally cast; (b) directionally solidified, with columnar grains, as can be seen from the vertical streaks; and © single crystal. Although more expensive, single crystal blades have properties at high temperatures that are superior to those to those of other blades. Source: Courtesy of United Technology Pratt and Whitney.
Casting Process
Advantages
any intricate shape can be cast
any ferrous or non ferrous metals & alloys are castable
Tools required for casting molds are simple & inexpensive
Grains of a Two-Phase System
(a) Schematic illustration of grains, grain boundaries, and particles dispersed throughout the structure of a two-phase system, such as lead-copper alloy. The grains represent lead in a solid solution of copper, and the particles are lead as a second phase. (b) Schematic illustration of a two-phase system consisting of two sets of grains: dark and light. Dark and light grains have their own compositions and properties, respectively.
Steps in making Sand Casting
Pattern making
Core making
Molding
Melting and pouring
Cleaning of the cast products