21.29 To what factors do you attribute the difference in the specific energies in machining the materials shown in Table 21.2? Why is there a range of energies for each group of materials? TABLE 21.2Approximate Range of Energy Requirements inCutting Operations at the Drive Motor of theMachine Tool (for Dull Tools, Multiply by 1.25)Specific energyMaterialW-s/mmAluminum alloysCast ironsCopper alloysHigh-temperature alloysMagnesium alloysNickel alloysRefractory alloysStainless steelsSteelsTitanium alloys0.4-11.1-5.41.4-3.23.2-80.3-0,64.8-6.73-92-52-92-5

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Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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21.29 To what factors do you attribute the difference in the specific energies in machining the materials shown in Table 21.2? Why is there a range of energies for each group of materials?

TABLE 21.2
Approximate Range of Energy Requirements in
Cutting Operations at the Drive Motor of the
Machine Tool (for Dull Tools, Multiply by 1.25)
Specific energy
Material
W-s/mm
Aluminum alloys
Cast irons
Copper alloys
High-temperature alloys
Magnesium alloys
Nickel alloys
Refractory alloys
Stainless steels
Steels
Titanium alloys
0.4-1
1.1-5.4
1.4-3.2
3.2-8
0.3-0,6
4.8-6.7
3-9
2-5
2-9
2-5

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