Research Article
Characterization of Tool Wear in High-Speed Milling of Hardened Powder Metallurgical Steels
Table 2
Work piece materials.
| Powder metallurgical steels | | | Term | Cold work steel HS 4-2-4 PM | High-speed steel 6-5-3 PM | Hardness (HRC) | 66 | 64 | Binder | C Cr Mo V W | C Si Mn Cr Mo V W | Modulus of elasticity (GPa) | 223 | 230 | Density (kg/dm3) | 7.79 | 8.0 | Thermal conductivity (W/mk) | 19.6 | 24.0 | Thermal expansion coefficient (10−6/K) (at 100/200/300/600°C) | 10.6/11.1/11.6/12.6 | 11.5/11.7/12.2/13.0 | Specific heat capacity (W/mK) | 450 | 420 |
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