影响灰铸铁气缸盖表面硬度的因素分析  

Analysis on Factors Affecting Surface Hardness of Gray Cast Iron Cylinder Head

作　　者：沙羽 李涛 SHA Yu;LI Tao(Sinotruk(Hongkong)Limited Jinan Casting&Forging Center,Jinan 250200,Shandong,China)

机构地区：[1]中国重汽(香港)有限公司济南成型厂,山东济南250200

出　　处：《铸造》2022年第1期84-88,共5页Foundry

摘　　要：分析了灰铸铁表层铁素体层的形成原因,综述了影响灰铸铁缸盖表面硬度的影响因素,包括生铁加入量、时效处理温度、孕育剂加入量、熔炼过热温度。通过试验验证表明,型砂含水量的增加促进气缸盖表面形成一层铁素体层,降低硬度值;生铁加入量越高,气缸盖表面硬度降低越明显。This paper analyzes the causes of ferrite layer on the surface of gray cast iron,and summarizes the influencing factors on the surface hardness of gray cast iron cylinder head,including pig iron addition,aging treatment temperature,inoculant addition and melting superheat temperature.The test results show that the increase of water content in molding sand promotes the formation of a ferrite layer on the surface of the cylinder head and reduces the hardness value;the higher the amount of the pig iron,the more obvious the decrease of the surface hardness of the cylinder head.

关 键 词：灰铸铁 硬度 生铁加入量 过热温度 型砂含水量 

分 类 号：TG113.251[金属学及工艺—物理冶金]