Effect of Scrap Tire Inner Steel Wire on Performance of Synthetic Gray Cast Iron Brake Disc
Author of the article:LI Zhao;ZHAO Zhongkui;YI Guanyu;WANG Chunxuan;SUN Hongbin
Author's Workplace：School of Materials Science and Engineering,Shandong Jianzhu University,Jinan 250000,China;Shandong Foundry Clean Production Engineering Technology Research Center,Jinan 250000,China;Shandong Luside Machinery Co.,Ltd.,Binzhou 256600,China
Key Words：waste tire inner steel wire back to the furnace charge synthetic gray iron brake disc
Abstract：The steel wire inside waste tires and the return charge of different ratio were used as the main raw materials, the carburizing agent was used for carburizing, 75 ferrosilicon inpregnant agent and Si-Ba-Ca-Al long-acting inpregnant agent were used for in-stream inpregnant, and Cr, Cu and other alloy elements were added for microstructure strengthening.Under the same casting process, the preparation of basically the same chemical composition of gray cast iron brake disc and Φ 30 mm single cast test bar, then the microstructure, hardness, tensile strength of the specimens for detection analysis. The results show that different ratio of raw materials has a great influence on the type, length and sheet spacing of pearlite, and the pearlite content does not change significantly. The influence on the hardness and tensile strength is great,when the proportion of steel wire in the waste tire is changed from 70% to 80%, the change of tensile strength and hardness is obvious. With the increase of the proportion of steel wire in waste tires, the proportion of A-type graphite increases from 93.7% to 99.2%. Pearlite content increased from 95.3% to 99.1%, pearlite graphite and pearlite gradually refined, tensile strength and hardness gradually increased, meeting the performance requirements of high-performance brake disc.
