Effect of Thermal Cycling on Hardness of Plain Carbon Steels

摘要

Thermal cycling tests were carried out on carbon steel up to 1.05 C%. A single run was performed at upper temperature of 500C~0 and lower temperature of 30C~0 in different media (water, sea water, and oil). For several numbers of cycles up to 30 cycles for an accurate determination of heating and cooling times. The effect of thermal cycling on the hardness were evaluated, From the obtained test results, it was found that:rnThe hardness decreased with increasing the thermal cycling for both the annealed and tempered samples in all media (water, sea water, and oil), but this decreased in hardness very small and can be neglected.