Apraiz warns that slow cooling through 450–550°C after tempering, or holding in that range, can cause intergranular fracture in alloy steels (especially with Mn, Cr, Ni, Sb, P). Rapid cooling through that range avoids it.
While I cannot provide the file, the to find “Jose Apraiz Barreiro Tratamientos Termicos de los Aceros PDF” legally are: Apraiz warns that slow cooling through 450–550°C after
The author provides examples of practical applications of thermal treatments in various industries, including: or holding in that range
Existen varios tipos de tratamientos térmicos que se pueden aplicar a los aceros, cada uno con objetivos específicos: cada uno con objetivos específicos: