Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN: 9780190698614
Author: Sadiku, Matthew N. O.
Publisher: Oxford University Press
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Machining Processes and Machine Tools
Machining is represented as the process in which an excessive amount of substance is eliminated from the particular element in the form of pieces. In machining, cutting tools such as rotary tools, lathe, drill press, grinder, chop saw, welders, and many …
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22.36 Referring to Table 22.1, state which tool materials would be suitable for interrupted cutting operations.
Explain.

TABLE 22.1 General Characteristics of Tool Materials Carbides Cubic boron nitride Single-crystal diamond" Cast-cobalt High-speed steels Property alloys WC TIC Ceramics 4000-5000 HK 7000-8000 HK 91-93 HRA 1800-3200 HK 91-95 HRA 2000-3000 HK 83-86 HRA 82-84 HRA 46-62 HRC 90-95 HRA 1800-2400 HK Hardness Compressive strength, MPa 4100-4500 1500-2300 4100-5850 3100-3850 2750-4500 6900 6900 Transverse rupture strength, MPa Impact strength, 2400-4800 1380-2050 1050-2600 1380-1900 345-950 700 1350 1.35-8 0.34-1.25 0.34-1.35 0.79-1.24 <0.1 <0.5 <0.2 Modulus of elasticity, GPa 200 520-690 310-450 310-410 850 820-1050 Density, kg/m3 Volume of hard phase, % Melting or decomposition temperature, °C Thermal conductivity, W/m-K Cocfficient of thermal expansion, x 10-6 °C 8600 8000-8700 10,000-15,000 5500-5800 4000-4500 3500 3500 7-15 10-20 70-90 100 95 95 1300 1400 1400 2000 1300 700 30-50 42-125 17 29 13 500-2000 12 4-6.5 7.5-9 6-8.5 4.8 1.5-4.8 *The values for polycrystalline diamond are generally lower, except for impact strength, which is higher.
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Transcribed Image Text:TABLE 22.1 General Characteristics of Tool Materials Carbides Cubic boron nitride Single-crystal diamond" Cast-cobalt High-speed steels Property alloys WC TIC Ceramics 4000-5000 HK 7000-8000 HK 91-93 HRA 1800-3200 HK 91-95 HRA 2000-3000 HK 83-86 HRA 82-84 HRA 46-62 HRC 90-95 HRA 1800-2400 HK Hardness Compressive strength, MPa 4100-4500 1500-2300 4100-5850 3100-3850 2750-4500 6900 6900 Transverse rupture strength, MPa Impact strength, 2400-4800 1380-2050 1050-2600 1380-1900 345-950 700 1350 1.35-8 0.34-1.25 0.34-1.35 0.79-1.24 <0.1 <0.5 <0.2 Modulus of elasticity, GPa 200 520-690 310-450 310-410 850 820-1050 Density, kg/m3 Volume of hard phase, % Melting or decomposition temperature, °C Thermal conductivity, W/m-K Cocfficient of thermal expansion, x 10-6 °C 8600 8000-8700 10,000-15,000 5500-5800 4000-4500 3500 3500 7-15 10-20 70-90 100 95 95 1300 1400 1400 2000 1300 700 30-50 42-125 17 29 13 500-2000 12 4-6.5 7.5-9 6-8.5 4.8 1.5-4.8 *The values for polycrystalline diamond are generally lower, except for impact strength, which is higher.
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