TRIBOLOGICAL ANALYSIS OF STEEL WITH DIFFERENT GRADES UNDER WET CONDITION USING PIN ON DISC

Steel, being the most essential and frequently used metal has many applications. This material is been classified by various grade one of which is European grade i.e. EN7 (Mild steel), EN8, EN24, EN31 etc. This classification is based basically on the percentage composition and particularly carbon percentage which is responsible for strength and hardness of any steel material. Different grades steel has been tested in the laboratory and analyzed them with respect to different parameter like sliding speed, time & load. The same experiment is done even after heat treatment which includes both hardening (quenching in water bath ) and annealing process , taken place at 830 0C. After experiment, that is before heat treatment it has been observed that initially the wear increases with time but slightly reduces and becomes constant after sometime. Also with the increase in sliding distance, wear volume also increases but wear rate decreases after covering some distance. So overall conclusion is that the wear of mild steel is more than EN8. Heat treatment by quenching make the surface harder and annealing is just opposite, as it makes the material more ductile. Quenching is the technique which is good if concerning surface hardness and less wear and there are various cooling medium for quenching that is water bath and oil bath of different grades