窄结晶温度范围铜合金的铸造工艺探讨  

Research on Casting Technique of High-Strength Brasses with Narrow Crystallization Range

作　　者：姜全 宁立刚 席锦会[2] 王福兴 

机构地区：[1]山东只楚民营科技园股份有限公司鲁宝有色合金厂,山东烟台264002 [2]中国矿业大学材料科学与工程学院,江苏徐州221008

出　　处：《铸造》2007年第4期419-420,共2页Foundry

摘　　要：通过实际生产从工艺角度分析了底注法生产窄结晶温度范围高强度黄铜时夹杂、缩孔缺陷的产生机理。针对底注法所出现的问题并根据该材料为窄凝固范围的合金,有逐层凝固的特点,采用了平浇立冷的工艺方法。该方法在型腔中建立了一个递增的温度梯度,使铜液在平稳状态下充型、顺序凝固,消除了夹杂、缩孔缺陷。The mechanism of the inclusion and shrinkage cavity in high-strength brasses produced by bottom running method was analyzed from the point of view of production technology. According to the problems on bottom running method and the narrow crystallization range of this alloy that can freeze layer-by-layer, the measure named pouring horizontally and cooling vertically method was put forward. The incremental temperature gradient in the impression is formed. And it can keep the cavity fill stationary in progressive solidification. It avoids the inclusion and shrinkage cavity.

关 键 词：窄结晶温度 高强度黄铜 平浇立冷工艺 

分 类 号：TG27[金属学及工艺—铸造]