摘要
介绍了6DM3灰铸铁缸体的技术要求,详细阐述了其生产工艺:采用中频感应电炉熔炼铁液,原材料为废钢+回炉料+增碳剂;炉料熔化前加0.15%±0.02%的埃肯预处理剂进行铁液预处理,采用Sn粒及GF300合金进行合金化;在浇包内加入75Si Fe孕育剂,浇注时,随流加入约0.1%的Si-Sr-Zr孕育剂;出铁温度为1 500~1 530℃,浇注温度为1 410~1 430℃,浇注时间为30~35 s;缸体落砂后进行去应力退火。生产结果显示:6DM3缸体铸件本体的金相组织和力学性能均满足技术要求,且质量稳定性控制较好。
The technical requirements of 6DM3 gray iron cylinder block were introduced.Its production process was decribed in detail:using medium frequency induction furnace to melt iron melt,the raw materials were consisted of steel scrap+returned charge+recarburizer;adding 0.15%±0.02%Elkem pretreating alloy to pretreat the iron melt before charges having been melted,alloying the melt with Sn grains and GF300 alloy,adding 75SiFe inoculant into the ladle,adding about 0.1%Si-S r-Zr inoculant into the pouring stream;tapping temperature was of 1 500~1 530 2,pouring temperature was of 1 410~1 430 2,pouring time was of 30~35 s,the cylinder block to be destressing annealed.The production result showed:both the metallographical structure and mechanical properties of the 6DM3 cylinder block body met the technical requirements,and the quality stability was controlled relatively good.
作者
王瑞冬
尹庆华
WANG Rui-dong;YIN Qing-hua(No.1 Foundry,FAW Foundry Co.,Ltd.,Changchun 130011,China)
出处
《现代铸铁》
CAS
2018年第2期27-30,共4页
Modern Cast Iron
关键词
灰铸铁
缸体
质量稳定性
gray iron
cylinder block'quality stability
