灰铸铁曲轴箱缩陷分析及工艺措施  

Analysis and Process Measures for Sink of Grey Cast Iron Crankcase

作　　者：赵梦航 ZHAO Meng-hang(SDEC Haian Co.,Ltd.,Nantong 226601,Jiangsu,China)

机构地区：[1]上柴动力海安有限公司,江苏南通226601

出　　处：《铸造》2024年第9期1316-1318,共3页Foundry

摘　　要：为解决SC10E系列曲轴箱厚大部位缩陷缺陷的问题,采用了激冷铸件缺陷位置、降低回炉料对铸件收缩倾向的影响、调换孕育剂等方法。具体的措施包括:在缺陷位置顶部安装铬铁矿砂芯;修改熔炼炉料配比,修改前新生铁∶回炉料∶废钢=2∶4.5∶3.5,修改后新生铁∶回炉料∶废钢=2∶0∶8;将RECaBa孕育剂调换为Si75Sr1.5孕育剂。措施实施后大幅度降低了此产品缩陷缺陷率,彻底解决了该产品铸造废品率偏高的问题。In order to solve the problems of sink defects in thick parts of SC10E series crankcase,methods such as chilling casting defect location,reducing the influence of return charge on the sink tendency of casting,changing inoculant,and so on were adopted.Specific measures include that install chromite sand cores on the tops of the defect locations;modify furnace charge ingredient ratio,namely new pig iron∶return charge∶steel scrap=2∶4∶5∶3.5 before modification and new pig iron∶return charge∶steel scrap=2∶0∶8;replace RECaBa inoculant with Si75Sr1.5 inoculant.After the implementation of the measures,the sink defect rate of this product is greatly reduced,and the problem of high casting scrap rate of this product is completely solved.

关 键 词：发动机曲轴箱 缩陷缺陷 激冷 Si75Sr1.5孕育剂 

分 类 号：TG143.2[一般工业技术—材料科学与工程]