Abstract:
In this study, the effects of heat treatments annealing ,hardening and tempering on the
microstructure and hardness of Mn-Fe Alloy were investigated. The Mn-Fe alloy samples were
annealed at 900◦C for 20 min then cooling inside furnace and hardened treatment at 900◦C for 20 min
with cooling by water, oil, and salts solution. The specimens were subsequently tempered at
temperatures of 100 oC, 290 oC, 350 oC and 500oC. The microstructures, and hardness properties of
these samples were analyzed and compared with samples without treatment. The microscopic
examinations showed that difference in grains size for samples before and after heat treatments. The
result showed that tempering of Mn-Fe Alloy samples (0.3%C) significantly exhibited better hardness
as compared with that of Mn-Fe alloy without treatments .
Keywords: annealing , hardening , tempering
أ.م.د. نهى هادي جاسم | Assist.Prof.Dr. Nuha Hadi Jasim | 8952