Abstract: In this work, the
effect of heat treatment process of spheroidal intermediate annealing on
corrosion resistance and microhardness is studied. For this purpose low
composition of chromium-nickel steel was chosen. Samples of this steel were
carburized, normalized, annealed, hardened and tempered. All results were
compared with samples passed the same heat treatment processes but without
annealing. It was shown that the hardness of the material is affected by
annealing time and temperature with no obvious pattern. The best result of
microhardness showed samples annealed at for
60 min holding time, where it was 50.4HRC (increased about 30%). Corrosion
resistance was measured by weight loss in 0.1M HCl acidic solution. Almost all
samples show a decrease in weight loss. This decrease in weight loss increases
with time. The best result of corrosion resistance showed samples annealed at 45
min holding time.
