Control Technology of Cast High Strength and Toughness QT600-10 Ductile Iron Casting
Author of the article:CHENG Jianlong
Author's Workplace：Anhui Shenjian Technology Co., Ltd., Hefei 230022,China
Key Words：as-cast high strength and toughness QT600-10as-cast qt600-10 alloying silicon solid solution enhancement
Abstract：
The production techniques of as-cast QT600-10 is discussed. The main points of as-cast ductile iron castings with high strength and toughness are briefly recommended. According to the wall thickness of castings,the main chemical constituents are as follows,C 3.6%~3.8%, Si 2.5%~2.8%、Mn<0.3%, the microalloying elements copper and tin are Cu0.20%~0.50% and Sn 0.02%~0.05%. The melt contains high carbon and low silicon, the carbon equivalent is moderate.Spheroidizing treatment with low RE Si-Mg6-8 RE1-5, Inoculation treatment with conventional 75 SiFe inoculant or long-acting inoculant. By controlling the ratio of ferrite to pearlite in matrix structure, high strength and toughness of as-cast QT600-10 can be obtained.
