发动机缸体、缸盖用覆膜砂芯性能的研究  

Study on Performance of Pre-coated Sand Core Used for Cylinder Block and Cylinder Head

作　　者：李辉[1] 周建荣[1] 

机构地区：[1]合肥工业大学材料科学与工程学院,安徽合肥230009

出　　处：《铸造技术》2009年第4期461-464,共4页Foundry Technology

摘　　要：研究固化工艺及存放时间对缸体、缸盖用覆膜砂芯的抗拉强度和发气性的影响。得出型芯生产的最佳工艺方案:固化温度为230℃,固化时间为120 s,存放时间不能超过12 h。在这样的固化工艺与存放时间下,制备的型芯满足缸体、缸盖用覆膜砂芯高强度、低发气量的要求。The influence of curing technology and resting period on the tensile strength and gas forming property of pre-coated sand core used for cylinder block and cylinder head was studied. The best processing of sand-core making was obtained, the curing-temperature should be 230 ℃, the curing-time should be 120 s, the resting period should be less than 12 hours. The sand-cores produced by this processing can meet the requirement of high tensile strength and low gas forming property of pre-coated sand core used for cylinder block and cylinder head.

关 键 词：覆膜砂芯 抗拉强度 发气性 固化工艺 存放时间 

分 类 号：TG221[金属学及工艺—铸造]