An investigation on the influence of double heat treatment process on mild steel plate

Rahfizan , Khairuzzaman (2013) An investigation on the influence of double heat treatment process on mild steel plate. Project Report. UTeM. (Submitted)

Text AN INVESTIGATION ON THE INFLUENCE OF DOUBLE HEAT TREATMENT PROCESS ON MILD STEEL PLATE 24pages.pdf Download (5MB)

Abstract

This research covered mainly the effect of double heat treatment on mild steel plate. Three types of heat treatment are quenching, tempering and normalizing were used in this study. The specimen that used in this study is consisted of square shape mild steel plate with 250mm x 40 mm x 4 mm dimension. During heat treatment process, specimen is heated up to 960°C for one hour before taken out from the furnace. Two of the specimens then are quenched in water at room temperature. For other specimen, it will cool at room temperature due the normalizing process. One of the specimens from quenching process will be continued with tempering process, tempering process consist two level of heating process and temperature will be considered. After the first stage of the heat treatment process, three types of test will be conducted which are hardness test, microstructure and tensile testing the specimen. After that, another specimen will undergo the same heat treatment process for second time. The specimen also will be tested with three types of testing and the result of single and double heat treatment will be compared. The expected result for hardness and strength for tempering, quenching and normalizing is the specimen becomes more increase.

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