Effect of TiC Addition and Heating Mode on the Electrochemical Response of Powder Metallurgy Processed Corrosion-Resistant Austenitic and Ferritic Steels

Resumo

Austenitic steel 316L and ferritic steel 434L produced by sintering of atomized powders with additions of different volume fractions (0, 4, 8, and 12 vol.%) of titanium carbide particles in microwave and conventional furnaces are studied. The microwave heating results in more intense densification, hardening, higher corrosion resistance, and grain refinement as compared to sintering in the conventional furnace. Steel 316L with 4 vol.% TiC sintered in the microwave furnace exhibits the highest corrosion resistance.