EFFECT OF CARBURIZING AND NORMALIZING ON MECHANICAL PROPERTIES AND MACHINABILITY OF AISI 1018 LOW CARBON STEEL

Ramam Singh

Dr. Lokendra Pal Singh

Abstract

The carburization and heat treatment have been recognized by some means of improving the several properties of metals and alloys. The existence of low carbon steel, 80 % of all metals formed in the most important engineering and construction material. In the present experimental study undergone to the carburization treatment used wood charcoal as the carburizer, carburized at 860 °C, 900 °C, 940 °C, carburizing temperature followed by quenched with water then tempered at 200 °C for half an hour and another normalizing heat treatment at 910 °C, temperature for followed by air cooling at room temperature. Subsequently, this the carburized and normalized low carbon steels are applied for numerous kind of mechanical test such as hardness test, tensile test, toughness test and the machinability test. From the experimental data obtained, tensile strength, Rockwell hardness, impact toughness, and machinability rate were calculated. The mechanical and machinability test results are compared before and after carburization and normalization treatment process in sequence to perceive the effect of pack carburization with rare carburizing temperatures and normalization on the performance (life cycle) of the manufacturing, engineering applications and metal fabrication implements. Test data was analyzed and experimentally found that the mechanical properties and machinability rate of low carbon steel samples to be profoundly influenced by the process of carburization and normalization. It was concluded that the low carbon steel samples at the temperature of 940 °C give the excellent test results for the diverse kinds of mechanical properties because at this temperature it demonstrates the most superior tensile strength, hardness whereas the low carbon steel at normalization temperature of 910 °C gives best results for toughness and machinability rate in comparing to carburization temperatures

Keywords- Carburization, Mechanical test, Machinability rate, Normalization, Engineering applications, etc