Fig. 1. Cross-sectioned M35 HSS (a) as-received and mounted longitudinally, and (b)
after VHT and mounted transversely. The inset in (a) shows a large primary carbide
fractured during cold drawing.
Fig. 2. (a) Hardness (HRC) and (b) carbon content measured as a function of incre-
mental grind off the surface. Note: full hardness and full carbon content retention were
achieved after 30 mm were ground from the surface. This result is consistent with full
removal of the observed 30 mm (radial) oxide shown in Fig. 1(b).