Chapter 3

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Unformatted text preview: 1 15.5 0.70 1940 4 3 93 20 0.97 1950 4 2 94 33 1.21 Correlation between Total Investment and Output per Man-Hour Correlation (Based on the USA data : 'Civilization through Cutting Tools') Basic Requirements of Tool Materials (Metal Cutting) 1. 1. 2. 3. High-temperature (physical and chemical) stability particularly high-temperature or hot hardness. High abrasion wear resistance (AWR) High resistance to brittle fracture (RBF), or toughness (HTS), High performance in all of these three attributes is generally not possible. For example, materials with increased high-temperature resistance and high wear resistance will also have reduced resistance to brittle fracture. Basic Requirements of Tool Materials (Metal Cutting) 1. 2. 3. High-temperature (physical and chemical) stability particularly high-temperature or hot hardness. High abrasion wear resistance (AWR) High resistance to brittle fracture (RBF), or toughness (HTS), Fig. 1 Fig. 1 Tungsten Carbide Titanium Carbide High-Speed Steel High- F...
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This note was uploaded on 02/04/2014 for the course ME 3162 taught by Professor Nus during the Spring '13 term at National University of Singapore.

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