Major classes of tool materials type type c w mo cr v

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Unformatted text preview: M-10 T- 1 T- 4 T- 6 T-15 0.80 0.08 0.85 0.70 0.75 0.80 1.5 6 1.5 18 18 20 12 5 8 8 - 4 4 4 4 4 4 4 2 1 2 1 1 2 5 5 12 5 64.7 M-3(I) M-3(II) M- 7 1.00 1.15 1.00 6 6 1.5 5 5 8 4 4 4 2.5 3 2 - M- 4 M-15 M-15 1.3 1.55 1.55 6 12 6 5 3 4 5 5 4 5 5 5 5 M-42 1.08 1.5 9.5 4 1.1 8 Compositions and types of popular high-speed steels 62.4 Major Classes of Tool Materials 3. Cast Alloy Tools 3. Cast-alloy tools have significant amount of cobalt, chromium, tungsten, and carbon, the carbide phase being about 25 to 30%, by volume. They are cast into their final shape and such tools are also known as ‘stellites’. Slightly higher speeds than HSS and less tendency to form BUE. Widely used in the machining of cast iron, malleable iron and hard bronzes. High hardness (58-64 HRC), good wear resistance, high temperature hardness, very low toughness - not suitable for intermittent cutting. Good for deep boring, continuous turning ( better than HSS). Major Classes of Tool Materials 4. Tungsten/Cemented Carbide Tools Made by mixing tungsten power and car...
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