Study on Performance of Gray Cast Iron Brake Disc with Different Compositions
Author of the article:LIANG Pengfei;FAN Jinhui;ZHOU Ji;WU Xingyuan
Author's Workplace：College of Mechanical Engineering, Donghua University, Shanghai 201620, China;Guangde Asia-Pacific Automotive Intelligent Braking System Co., Ltd., Guangde 242234, China
Key Words：high carbon equivalent gray cast iron brake disc performance
Abstract：
The fracture morphology, machinability and thermal conductivity of high carbon equivalent gray cast iron and common gray cast iron for brake disc were studied by SEM and DSC thermal analyzer. The results show that the fracture modes of tensile samples of high carbon equivalent gray cast iron and ordinary gray cast iron are the combined mechanism of cleavage fracture and intergranular fracture. After machining, the surface roughness of high carbon equivalent gray cast iron is 0.4, and that of ordinary gray cast iron is 1.18. High carbon equivalent gray cast iron has lower tool wear and better machining performance. DSC curves show that the eutectoid and eutectic transition peaks of high carbon equivalent gray cast iron are higher than that of ordinary gray cast iron, and the thermal conductivity is better.
