Effects of Ferrosilicon and Rare Earth Compound Inoculation on the Microstructure and Properties of High Carbon Gray Iron
Author of the article:XU Rongfu;LI Changhou;SUN Xiangcheng;SHI Yueya;JIANG Wentao
Author's Workplace：School of Materials Science and Engineering,Shandong Jianzhu University,Ji'nan 250101,China;Yantai Nanshan University,Longkou 265706,China
Key Words：high CE gray iron complex inoculation rare earth mechanical property
Abstract：The effect of the compound inoculation of ferrosilicon and rare earth on the microstructure and mechanical properties of high carbon gray cast iron was studied.The results show that the morphology of flake graphite changed and even spheroidized with the increase of the amount of rare earth when the amount of ferrosilicon is unchanged.When the rare earth content is 1.2%,the graphite began to vermicularize,and leustenite and pearlite began to appear in the matrix.When the amount of rare earth is 1.4%,the graphite began to spheroidize,the pearlite content in the matrix decreased,and the amount of lestenitic increased.When the amount of rare earth is up to 2.0%,the spheroidization rate continued to increase,and a large number of leitenitic bodies appeared in the matrix.With the increase of rare earth content,the mechanical properties of high carbon gray cast iron show an overall increasing trend.When the rare earth content exceeds 1.0%,the mechanical properties of high carbon gray cast iron increase significantly,and the tensile strength exceeds 450 MPa.
