Study on Microstructure and Properties of Vanadium Titanium Gray Cast Iron with Different Compositions
Author of the article:SUN Lan;XIAN Guang;JIANG Fan;FAN Hongyuan
Author's Workplace：School of Mechanical Engineering,Sichuan University,Chengdu 610065,China
Key Words：gray cast iron brake drum graphite morphology thermal conductivity
Abstract：The vanadium-titanium gray cast iron brake drum was cast by effective control of composition design,batching,melting and pouring.The microstructure and properties of the brake drum with different composition were studied.The results show that with the increase of vanadium and titanium content,the graphite is refined and the graphite form changes from A type to D type.With the increase of vanadium and titanium content,the strength and hardness of gray cast iron increase,but the thermal conductivity decreases.When the content of carbon,silicon,vanadium and titanium increases further,coarse and thick flake or block graphite will appear,and the strength and hardness will decrease significantly.The tensile strength,hardness and thermal conductivity of gray cast iron can be improved by controlling the content of vanadium and titanium.
