Effects of Heat-Treatment on the Microstructure and Wear Resistance of a High-Chromium Cast Iron for Rolls

Table 2

Hardness and impact toughness of specimen.

	As-cast	Quenching	Once tempering	Twice tempering
Hardness/HRC	51.3	62.1	55.2	56.3
Impact toughness/J	4.5	4.1	4.3	6.0