Study on the serialization and applications of low carbon ductile iron  

作　　者：SHU Xin-fu SHU Rui CHANG Dian-cun ZHANG Xiao-long ZHU Yan-dong LI Ling-fang LI Yu-zhong 

机构地区：[1]Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650093,Yunnan, P. R. China

出　　处：《China Foundry》2005年第4期254-259,共6页中国铸造（英文版）

基　　金：The paper is support by Foundation Key Project of Yunnan:Study on inoculated theory and reliability of low carbon ductileiron, NO. 1999E0004Z

摘　　要：Both the production process and the chemical composition of Sx were studied, and the serialization of low carbon ductile iron was also discussed. It was indicated that Sx modifier was sensitive to the carbon equivalent (CE) of molten iron and to some alloying elements too. When the CE of molten iron and the contents of alloying elements were changed, the content of Sx must be revised with the change correspondingly. Low carbon ductile iron can be stably changed into the one that non-carbon acicular ferrite and retained austenite (about 25%-28%) by quasi-casting bainitic process of using Sx-2 modifier treated Si-Mn-Cr-Cu-alloyed low carbon molten iron. The austenitic low carbon as-cast ductile iron could be obtained by the Ni-Si-Cr 35 5 2 percent alloys molten iron with less than 2% carbon treated by type Sx-3 modifier. The high-toughness ferritic low carbon as-cast ductile iron which contained more than 85 % ferrite in matrix could be got after the molten iron treated by type Sx-4 modifier, and it’s elongation was more than 10 %.Both the production process and the chemical composition of Sx were studied, and the serialization of low carbon ductile iron was also discussed. It was indicated that Sx modifier was sensitive to the carbon equivalent (CE) of molten iron and to some alloying elements too. When the CE of molten iron and the contents of alloying elements were changed, the content of Sx must be revised with the change correspondingly. Low carbon ductile iron can be stably changed into the one that non-carbon acicular ferrite and retained austenite (about 25%-28%) by quasi-casting bainitic process of using Sx-2 modifier treated Si-Mn-Cr-Cu-alloyed low carbon molten iron. The austenitic low carbon as-cast ductile iron could be obtained by the Ni-Si-Cr 35 5 2 percent alloys molten iron with less than 2% carbon treated by type Sx-3 modifier. The high-toughness ferritic low carbon as-cast ductile iron which contained more than 85 % ferrite in matrix could be got after the molten iron treated by type Sx-4 modifier, and it's elongation was more than 10 %.

关 键 词：low CARBON DUCTILE IRON Sx MODIFIER series MODIFICATION treatment application 

分 类 号：TG143.5[一般工业技术—材料科学与工程]