摘要
浇注系统设计是生产高质量铸件的重要环节,其作用是控制金属液充型速度及充型时间,使金属液平稳地进入铸型,同时能阻止熔渣和其他夹杂物进入型腔,尽可能减少金属液的二次氧化。本文指出了传统砂型铸造浇注系统设计方法在避免金属液产生二次氧化夹渣方面存在的不足,介绍了液态金属临界流动速度概念,针对临界流动速度设计浇注系统的局限性,提出了采用减压内浇道的砂型铸造浇注系统方法,使浇注系统既能具有良好的挡渣作用,又能避免金属液在充型过程中发生喷射和飞溅现象,减少金属液的二次氧化。
The design of the gating system is an essential part for high quality casting~ of which function is control of rate and time of mold filling and make the melt fill the mold smoothly, at the same time prevent the slag and other inclusions from entering the mold cavity. The conventional gating system design of sand casting process has the shortcoming in avoiding the secondary inclusions of melt. The concept of critical velocity of the melt was introduced and discussed. Aiming limitation of critical velocity theory in design of the gating system, a method of decompressing ingate of sand casting process was put forward. This gating system not only can remove the molten slag~ but also can avoid the splashing of the melt during the mold filling. The secondary inclusions can be reduced greatly.
出处
《铸造》
CAS
CSCD
北大核心
2013年第7期699-702,共4页
Foundry
关键词
砂型铸造
浇注系统
二次氧化
sand casting process
gating system design
secondary inclusion
