Study on Thermal Fatigue Property of Gray Cast Iron Brake Disc
Author of the article:CHENG Jianlong;ZHANG Xiaoxue
Author's Workplace：Anhui Shenjian Technology Co.,Ltd.,Hefei 230022,China;School of Mechanical Engineering,Anhui Sanlian University,Hefei 230601,China
Key Words：gray cast iron carbon equivalent brake disc thermal fatigue
Abstract：
Gray cast iron was the main materials of brake discs for its excellent thermal conductivity and wear resistance.Microstructure and properties of three kinds of gray cast iron with high carbon equivalent were measured and analyzed.Under the condition of cyclic heating and cooling,and plate type specimens with'V'notched was used,their thermal fatigue resistance was studied.The results show that if relatively low carbon equivalent,thus less graphite,even with high strength and hardness,thermal fatigue resistance is also poor.When the matrix is mainly pearlite,gray cast iron with high carbon equivalent and a certain amount of D-type graphite has good thermal fatigue property.
