Centrifugal Casting Process and Prevention Defects Measures of Water-cooled Centrifugal Ductile Iron Pipe DN80

Zhang Jianqiang; Wen Hui; Duan Jianbo; Li Xinke; Shen Fatian

doi:10.15980/j.tzzz.2021.03.029

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Centrifugal Casting Process and Prevention Defects Measures of Water-cooled Centrifugal Ductile Iron Pipe DN80
Vol. 41, Issue 3, Pages: 393-396(2021)
Published： 2021 ，
DOI： 10.15980/j.tzzz.2021.03.029

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[1]张建强,温慧,段建波,李新科,申发田.DN80水冷离心球墨铸铁管生产工艺及缺陷防止措施[J].特种铸造及有色合金,2021,41(03):393-396.

Zhang Jianqiang, Wen Hui, Duan Jianbo, et al. Centrifugal Casting Process and Prevention Defects Measures of Water-cooled Centrifugal Ductile Iron Pipe DN80. [J]. Special Casting & Nonferrous Alloys 41(3):393-396(2021)
[1]张建强,温慧,段建波,李新科,申发田.DN80水冷离心球墨铸铁管生产工艺及缺陷防止措施[J].特种铸造及有色合金,2021,41(03):393-396. DOI： 10.15980/j.tzzz.2021.03.029.

Zhang Jianqiang, Wen Hui, Duan Jianbo, et al. Centrifugal Casting Process and Prevention Defects Measures of Water-cooled Centrifugal Ductile Iron Pipe DN80. [J]. Special Casting & Nonferrous Alloys 41(3):393-396(2021) DOI： 10.15980/j.tzzz.2021.03.029.

摘要

对DN80离心球墨铸管关键工艺如熔炼、球化、离心浇注、退火等进行了详细阐述。DN80离心球墨铸管采用5t无芯工频电炉熔炼

出铁前为防止球化衰退按25kg/t加入硅铁合金

浇注采用水冷离心机按60s/支节奏进行浇注

球化包铁水温度控制在1 450～1 470℃

扇形包浇注温度控制在1 380～1 400℃

退火时采用连续式退火炉退火（980℃）。同时

特别针对DN80离心球墨铸管常出现的缺陷进行分析并提出预防措施。

Abstract

The key procedures for centrifugal casting DN80 ductile iron pipe were expounded

such as melting

spheroidization

pouring and annealing.The DN80 ductile iron pipe was smelted with 5 tcoreless main frequency furnce.Si-Fe alloy was added to prevent nodulized fading with 25 kg/t before pouring.The water-cooled centrifugal machine was carried out by 60 s/unit during pouring process.Meanwhile

the temperature of liquid Fe of nodulized laddle was controlled at 1 450～1 470℃

and fanladdle temperature was contraled at 1 380～1 400℃.Contiauous high temperature annealling furnace was adopted to anneal treatment at 980℃.In addition

common defects in the DN80 ductile iron pipe was analyzed and countermeasures were presented.

关键词

离心球墨铸铁管DN80生产工艺缺陷防止

Keywords

Centrifugal Ductile Iron PipeDN80Centrifugal Casting ProcessDefect Prevention

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Quality Improvement of Large Centrifugal Ductile Iron Pipes