离心球铁管承口部气孔缺陷分析

李远才; 童杏林; 李连杰; 王文清; 刘新桥; 李玉清; 王义贵

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离心球铁管承口部气孔缺陷分析
Hole Defects Analysis for Socket of Centrifugal Cast Ductile Iron Pipe
1997年第6期
纸质出版日期： 1997 ，
DOI：

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[1]李远才,童杏林,李连杰,王文清,刘新桥,李玉清,王义贵.离心球铁管承口部气孔缺陷分析[J].特种铸造及有色合金,1997(06):25-27.

Li Yuancai Tong Xinling Li Liangjie Wang Wenqing. Hole Defects Analysis for Socket of Centrifugal Cast Ductile Iron Pipe[J]. Special Casting & Nonferrous Alloys, 1997,(6).
[1]李远才,童杏林,李连杰,王文清,刘新桥,李玉清,王义贵.离心球铁管承口部气孔缺陷分析[J].特种铸造及有色合金,1997(06):25-27. DOI：

Li Yuancai Tong Xinling Li Liangjie Wang Wenqing. Hole Defects Analysis for Socket of Centrifugal Cast Ductile Iron Pipe[J]. Special Casting & Nonferrous Alloys, 1997,(6). DOI：

摘要

分析了离心球铁管承口针孔及其成因。结果表明，来自树脂粘结剂中的Ｎ２，Ｈ２等气体是导致针孔的主要气体。氧化夹杂物作为气泡生核的核心，并使之生长。若铸件凝固速度等于气泡逸出速度，针孔生成。

Abstract

In this paper the pinholes in the socket of centrifugal cast ductile iron pipe and their formation have been analyzed. The results show that the major gases led to pinholes formation in socket are N 2

H 2

ect. form sand core made of nitrogen containing resin binder. The oxide inclusion acts as the center for these bubbles nucleation and growth. When the casting solidification speed was equal to bubbles escape speed. The pinholes are formed.