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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
; q! |( j R( z, m. d& 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。
! {& J& }+ Z$ E% d2 y: [5 Q, c+ z& G关键词：冲天炉；高韧性；球墨铸铁; H; k- X* {6 B% [
中图分类号：TG255 文献标识码：B 文章编号：1003—8345(2007)04—0026—03
9 J6 m' e2 B H, rProduction of As—-Cast High Toughness Nodular Iron Castings with Cupola M elting; {/ I. c' c9 t# Y+ e
KONG Fan-gang ，BI Jing—bing2，WANG Jun2,ZHANG Ji-xiang2* {& ?, z1 f0 \9 ~# k0 ]0 i6 X
(1．Non—standard Equipments Manufacture Co．Ltd．，No．1 Inner Mongolia Machinery Group Co．，Baotou 014032，China；2．: `- N! Q' }5 t e# A/ w" \
Shengquan Group Co．Ltd．，Ji’nan 250204，China)
# x$ c: O2 u( W7 ?9 L+ F3 O+ B0 NAbstract： The QT 400-1 8 grade of as-cast high toughness nodular iron(with tensile strength≥400 Mpa．and elongation t>3 S u3 l, ]% X0 J( U5 a0 l# z7 o
8％)could be produced stably with cupola melting by adopting~llowing measures：optimizing chemical compositions，strictly
) m) s$ S8 Y( G# N+ v2 `4 f. O3 p- Vcontrolling every parameters of cupola melting including that the tuyere ratio was adopted as about 4％．the height of coke
/ K' n5 b0 r; F* O! d0 tbed was of 1 500-1 600 mm．the iron coke ratio was of 8：1．and the blast intensity was of 90-1 2 |
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发表于 2009-3-1 14:15:17
