Abstract
The CA6NM (ASTM 743, 13% Cr, 4% Ni e 0,4% Mo) martensitic stainless steel grade is used in manufacturing hydraulic turbines. In welding of the material for repair of cavitation damage, it is necessary to pre-heat and subsequently heat-treat the component in order to control the residual stresses after welding, due to the formation of hard and brittle martensite, which can lead to the deve…