灰铸铁气缸体氮气孔缺陷的分析及解决措施  

Analysis and Solution of Nitrogen Pore Defect in Gray Cast Iron Cylinder Block

作　　者：李孝艳 伍启华 孙帆 彭广涛 李娜娜 LI Xiao-yan;WU Qi-hua;SUN Fan;PENG Guang-tao;LI Na-na(Weichai Power Co.,Ltd.,Weifang 261061,Shandong,China;Weichai(Weifang)Material Forming and Manufacturing Center Co.,Ltd.,Weifang 261199,Shandong,China)

机构地区：[1]潍柴动力股份有限公司,山东潍坊261061 [2]潍柴(潍坊)材料成型制造中心有限公司,山东潍坊261199

出　　处：《铸造》2025年第3期380-384,共5页Foundry

摘　　要：采用扫描电镜和金相显微镜分析了导致灰铸铁气缸体渗漏问题的缺陷,通过缺陷形态和数值模拟软件分析,判断其为气孔缺陷。通过气孔产生原因及铁液中氮元素含量分析,判定其为氮气孔缺陷。采取设置冷铁套、出铁时加入钛铁合金和随流加入高锆孕育剂等工艺措施均可在一定程度上减少氮气孔缺陷。The defects caused of the cylinder block leakage problem were analyzed by using of SEM and metallographic microscope,and the defects were judged to be blowhole defects through defect morphology and numerical simulation software analysis.Through the causes of the blowhole defect and the nitrogen content in the liquid iron analysis,they were determined to be nitrogen pores.The nitrogen pore defects can be reduced to some extent by using of the processing measures such as setting chill jacket,adding ferrotitanium alloy while tapping,adding inoculant with high zirconium content on the stream,and so on.

关 键 词：灰铸铁 气缸体 渗漏 氮气孔 

分 类 号：TG245[金属学及工艺—铸造]