Abstract
Boron containing steels are widely used in gear and shaft application. Addition of Boron to case hardened steel enhances hardenability resulting in good impact strength and wear resistant properties. In this present study, the influence of 100 and 150 PPM Nitrogen gas on Boron steel has been analyzed. The microstructure, hardenability, hardness, and impact strength has been evaluated. The Impact test was carried out as per standard and Fractography analysis has been done. Fine grain structure was observed in the higher Nitrogen content samples indicates better mechanical properties. The impact strength has been improved nearly 9% in the higher Nitrogen containing samples because of fine grain structure. Combination of intergranular with dimple mode of fracture was observed in the high Nitrogen containing samples.
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