Study on the High Strength and High Elongation of As-cast Synthetic Ductile Iron
Author of the article:XIE Laiwang;CAI Kunshan;FAN Xiaoming;WANG Xiuqiang
Author's Workplace：Hubei tri-ring casting incorporated company,Suizhou 441300,China;School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China
Key Words：as-cast high strength and high elongation QT700-10 synthetic ductile iron
Abstract：
Using medium frequency induction furnace smelting,pure iron as the main burden with scrap steel,raw material,through the Cu,Ni,alloying,high quality recarburizer carburization,respectively by the method of bell jar furnace pretreatment and spheroidized,ladle inoculation into method,shell mold casting resin sand,the preparation of as-cast high strength and high elongation synthetic Y type of ductile iron casting.The results show that the graphite spheroidization grade is grade 2,the graphite size is grade 7,the matrix structure is fine,the pearlite-ferrite mixed matrix,the pearlite content was 65%,the tensile strength and elongation of as-cast synthetic ductile iron reached 763.0 MPa and 11.2%,respectively.
