Effect of V and Sn on microstructure and mechanical properties of gray cast iron

The cylinder liner is one of the important parts a diesel engine. Gray cast iron main material for manufacturing liners due to its good casting performance, convenient processing wear resistance and low cost. In present work, effects vanadium (V) tin (Sn) on microstructure properties gray were studied. Results show that increasing contents V Sn can not only refine graphite, but also reduce pearlite lamellar space. graphite size spacing are firstly reduced then increased. Pearlite quantity reaches over 98% after adding Sn. Adding promote precipitation solid solution strengthening iron, so as improve mechanical properties. Brinell hardness peak 424 HB at 0.21wt.% 0.06wt.% Sn, sample containing 0.11wt.% 0.08wt.% shows highest compressive strength tensile 1,699 MPa 515 MPa, respectively. mechanism comes from fine grain