冲天炉熔炼生产铸态高韧性球墨铸铁

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摘要：通过合理地选择化学成分，严格控制3 t／h冲天炉的各项熔炼工艺参数，即选择风口比为4％左右、底焦高度为
4 a5 I5 G+ F, v" V% W1 x1 500～1 600 mm，铁焦比为8：1，送风强度90～120 m3／m·min，稳定地生产出铸态高韧性QT400—18铸件。
! R) I: F: w5 Y7 J0 I7 ~3 d/ P关键词：冲天炉；高韧性；球墨铸铁
中图分类号：TG255 文献标识码：B 文章编号：1003—8345(2007)04—0026—03
+ e, P% j0 F9 y0 c: `Production of As—-Cast High Toughness Nodular Iron Castings with Cupola M elting
KONG Fan-gang ，BI Jing—bing2，WANG Jun2,ZHANG Ji-xiang2
* M/ x, t+ P: M) x3 N0 }$ h  Z(1．Non—standard Equipments Manufacture Co．Ltd．，No．1 Inner Mongolia Machinery Group Co．，Baotou 014032，China；2．
Shengquan Group Co．Ltd．，Ji’nan 250204，China)
3 X2 j6 d6 t0 i( G, M2 E# S( eAbstract： The QT 400-1 8 grade of as-cast high toughness nodular iron(with tensile strength≥400 Mpa．and elongation t>
) m! ^! q$ Q8 @0 O! y$ f8％)could be produced stably with cupola melting by adopting~llowing measures：optimizing chemical compositions，strictly
7 l% s" @& Z8 Y2 \( f4 x/ P0 j$ ]6 rcontrolling every parameters of cupola melting including that the tuyere ratio was adopted as about 4％．the height of coke
2 U/ b# p- w1 J2 @bed was of 1 500-1 600 mm．the iron coke ratio was of 8：1．and the blast intensity was of 90-1 2