3.8. Correlation between hardness and cooling rates
Expressions that calculate hardness HV using the cooling rate
and chemical composition were developed by Li [15]. In these
expressions the value of the cooling rate to 700 C is used. In this
paper, we present expressions that are valid from the austenitizing
temperature to room temperature. Correlation between hardness
and cooling rate could be established from the data in Tables 2
and 3 permitting to obtain numerical expressions (8) for estimating
hardness in function of cooling rates, austenitizing temperatures
and positions according to Fig. 17.