Mechanical and corrosion resistant properties of nitrided low carbon steel

Abstract

This paper is aimed on the work to study and analyze the effects of salt bath nitriding of EN-24 low carbon steel. The nitriding process was implemented in the salt bath component for 30 min and temperature was constant at 570 °C. The coated sample is characterized using X-ray diffraction, Pin on disc and Microvicker hardness tester to study the structural, wear, mechanical and corrosion properties. Before coating, the material is thoroughly cleaned and etched. A typical salt bath nit riding thickness for our sample is ∼ 5 µm. The results obtained are then compared for before and after the nitriding. XRD results showed that formation of the nitrides FeN phase in the sample. EN 24 low carbons steel showed the hardness of 231 HV before nitriding and it increased to 371 HV. The wear studies indicated that the coefficient friction is 0.80 and wear is ∼ 150 µm. The hardness is increased 1.5 times approximately.