真空等温铸造技术及应用  

Technology and Application of Vacuum Isothermal Casting

作　　者：胡美忠[1] 肖强伟[1] 蔡长春[1] 徐志锋[1] 余华[1] 

机构地区：[1]南昌航空工业学院材料科学与工程学院,江西南昌330034

出　　处：《铸造》2005年第9期864-866,共3页Foundry

摘　　要：在真空环境下,铸型与铸造合金同时加热,液态金属达到一定的过热度后,将高温铸型包围,破真空后,液态金属在大气压力下填充真空高温铸型,创造了极佳的充型条件.研究了真空等温铸造对液态金属充型能力的影响,结果表明,用这种方法生产的泡沫铝充型完整,孔格均匀,孔隙率95%.主网络厚度在0.1～0.25 mm之间,计算表明,壁厚再薄、直径更细的复杂铸件也可以成形.Under the vacuum condition, casting mould and metal are heated at the same time, and the liquid metal surrounds the casting mould while reaching certain overheat. After breaking the vacuum condition, the liquid metal fills the high-temperature casting mould of vacuum under atmospheric function. This creates extremely good filling condition. The aluminum foams produced with the method have the intact filling type, and the hole dose is even. The porosity of the aluminium foams is 95%, and the thickness of the main network is between 100-250μm. Result of calculation indicates that the complicated casting with the more thinner thickness of wall and more thinner diameter may take shape.

关 键 词：真空等温铸造 泡沫铝 结构均匀 

分 类 号：TG249.9[金属学及工艺—铸造] TG139.7[一般工业技术—材料科学与工程]