General Concepts 2 min read
Hot Piercing or Seamless tubing
Hot piercing is also known as seamless tubing or roll piercing process. The process setup is shown in Fig. 15.3.…
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Classification Of Hot Working Processes
The classification of hot working processes is given as under. 1. Hot rolling 2. Hot forging 3. Hot extrusion 4.…
General Concepts 5 min read
HOT WORKING
Mechanical working processes which are done above recrystallisation temperature of the metal are know as hot working processes. Some metals,…
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RECRYSTALISATION
During the process of plastic deformation in metal forming, the plastic flow of the metal takes place and the shapes…
General Concepts 4 min read
METAL FORMING
Metal forming is also known as mechanical working of metals. Metal forming operations are frequently desirable either to produce a…
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Objectives of Heat Treatment
The major objectives of heat treatment are given as under 1. It relieves internal stresses induced during hot or cold…
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Significance of Transformations Lines
Line ABCD The line ABCD tells that above this line melting has been completed during heating the iron. The molten…
General Concepts 3 min read
IRON-CARBON EQUILIBRIUM DIAGRAM
Fig. 8.6 shows, the Fe-C equilibrium diagram in which various structure (obtained during heating and cooling), phases and microscopic constituents…
General Concepts 3 min read
SHELL MOLD CASTING
Shell mold casting process is recent invention in casting techniques for mass production and smooth surface finish. It was originated…
General Concepts 1 min read
Comparison Between Permanent Mold Casting And Die Casting
The comparison between permanent mold castings and die casting given as under in Table 13.1 Table 13.1 Comparison between Permanent…
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Advantages Of Die Casting Over Sand Casting
1. Die casting requires less floor space in comparison to sand casting. 2. It helps in providing precision dimensional control…
General Concepts 6 min read
PRESSURE DIE CASTING
Unlike permanent mold or gravity die casting, molten metal is forced into metallic mold or die under pressure in pressure…