Performance of heavy ductile iron castings for windmills  

作　　者：Iulian Riposan Mihai Chisamera Stelian Stan 

机构地区：[1]POLITEHNICA University of Bucharest,313 Spl.Independentei RO-060042 Bucharest,Romania

出　　处：《China Foundry》2010年第2期163-170,共8页中国铸造（英文版）

摘　　要：The main objective of the present paper is to review the specific characteristics and performance obtaining conditions of heavy ductile iron(DI) castings,typically applied in windmills industry,such as hubs and rotor housings.The requirements for high impact properties in DI at low temperatures are part of the ENGJS-400-18U-LT(SRN 1563) commonly referred to as GGG 40.3(DIN 1693).Pearlitic in-uence factor(Px) and antinodularising action factor(K1) were found to have an important in-uence on the structure and mechanical properties,as did Mn and P content,rare earth(RE) addition and inoculation power.The presence of high purity pig iron in the charge is extremely beneficial,not only to control the complex factors Px and K1,but also to improve the 'metallurgical quality' of the iron melt.A correlation of C and Si limits with section modulus is very important to limit graphite nodule flotation.Chunky and surface-degenerated graphite are the most controlled graphite morphologies in windmills castings.The paper concluded on the optimum iron chemistry and melting procedure,Mg-alloys and inoculants peculiar systems,as well as on the practical solutions to limit graphite degeneration and to ensure castings of the highest integrity,typically for this field.The main objective of the present paper is to review the specific characteristics and performance obtaining conditions of heavy ductile iron（DI） castings,typically applied in windmills industry,such as hubs and rotor housings.The requirements for high impact properties in DI at low temperatures are part of the ENGJS-400-18U-LT（SRN 1563） commonly referred to as GGG 40.3（DIN 1693）.Pearlitic in-uence factor（Px） and antinodularising action factor（K1） were found to have an important in-uence on the structure and mechanical properties,as did Mn and P content,rare earth（RE） addition and inoculation power.The presence of high purity pig iron in the charge is extremely beneficial,not only to control the complex factors Px and K1,but also to improve the ＇metallurgical quality＇ of the iron melt.A correlation of C and Si limits with section modulus is very important to limit graphite nodule flotation.Chunky and surface-degenerated graphite are the most controlled graphite morphologies in windmills castings.The paper concluded on the optimum iron chemistry and melting procedure,Mg-alloys and inoculants peculiar systems,as well as on the practical solutions to limit graphite degeneration and to ensure castings of the highest integrity,typically for this field.

关 键 词：heavy ductile iron castings windmills parts CHEMISTRY STRUCTURE TREATMENTS control 

分 类 号：TG255[金属学及工艺—铸造]