摘要
介绍铸态薄壁铁素体球铁康明斯发动机排气连接管的生产工艺。在湿型砂挤压造型条件下 ,确定化学成分控制范围w为 :3 .5 %～ 3 .6%C ,2 .6%～ 2 .75 %Si,≤ 0 .2 %Mn ,≤ 0 .0 7%P ,≤ 0 .0 3 %S ,≤ 0 .1%Cu。采用球化处理及加入促进球化的合金元素铋和FeSi75人工随流孕育处理方法 ,不经热处理 ,生产出铸态满足康明斯公司工程标准CES410 97铁素体球墨铸铁和CES410 5 0— 0 0 7控制选择硅量的球墨铸铁 (球化率≥ 85 %、w为≤ 5 %P ,3 .6%～ 4.4%Si,HB 15 9～ 2 0 7,无游离碳化物 )的薄壁铸件。
Casting process of as-cast thin wall ferrite ductile iron exhaust pipe of Cummins engine has been introduced. Under the squeezing mold condition of green sand, the chemical composition is determined i.e. 3.5%～3.6% C,2.6%～2.75% Si,≤0.2% Mn,≤0.07% P,≤0.03% S,≤0.1% Cu. Without heat treatment, we adopt methods such as spheroidizing treatment, add element Bi and FeSi75, artificial random inoculation to produce the type CES41097 ferrite ductile iron and the type CES CES41050-007 nodular iron, which fit for the engineering standard of Cummins company, and contains ≥85% the spheroidization rate, ≤5% P,3.6%～4.4% Si,159～207 HB, no free carbide.
出处
《铸造技术》
CAS
北大核心
2003年第6期509-510,共2页
Foundry Technology
