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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
0 H$ i& L: y# q5 V# {1 500~1 600 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。
( J6 Q& q! l( O j关键词:冲天炉;高韧性;球墨铸铁# `) V/ z7 R4 i/ V% I3 o
中图分类号:TG255 文献标识码:B 文章编号:1003—8345(2007)04—0026—03
/ J; Q: i) C: S3 K8 t, a6 ]+ fProduction of As—-Cast High Toughness Nodular Iron Castings with Cupola M elting
2 L5 E$ r; f, r4 D7 L! E# aKONG Fan-gang ,BI Jing—bing2,WANG Jun2,ZHANG Ji-xiang26 v) i3 R3 q0 |# Z
(1.Non—standard Equipments Manufacture Co.Ltd.,No.1 Inner Mongolia Machinery Group Co.,Baotou 014032,China;2.
/ y. T( z& ~: Q" v* d; xShengquan Group Co.Ltd.,Ji’nan 250204,China)" V1 X3 l; E9 D6 N: x$ V/ N5 W! [
Abstract: The QT 400-1 8 grade of as-cast high toughness nodular iron(with tensile strength≥400 Mpa.and elongation t>! |9 t1 `$ z; `/ B8 f3 F" m' s
8%)could be produced stably with cupola melting by adopting~llowing measures:optimizing chemical compositions,strictly
" d) k* F. R! L. ~+ n' Lcontrolling every parameters of cupola melting including that the tuyere ratio was adopted as about 4%.the height of coke
5 ?) N- S5 |. }0 Hbed 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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