大型镁合金构件低压铸造成形装备技术  

Equipment Technology in Low Pressure Casting for Large Magnesium Alloy Components

作　　者：李新雷[1] 郝启堂[1] 介万奇[1] 

机构地区：[1]西北工业大学凝固技术国家重点实验室,陕西西安710072

出　　处：《稀有金属材料与工程》2014年第3期703-706,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金资助项目(51375391);西安市科技计划项目(CX12180-5)

摘　　要：低压铸造是生产优质复杂镁合金构件的首选方法之一,但是在应用于大型构件成形时往往受到装备技术的限制。本文从装备机械部分、控制系统以及保护气体混气系统等方面进行了镁合金低压铸造装备技术的研发。研制的铸造装备熔化量为1000 kg镁合金液,最大单件浇注质量可达850 kg。混气系统可实现干燥空气、SF6及CO2保护气体的在线式比例混合,并能实现对铸造过程中镁合金液的有效阻燃保护。此外,模糊PID复合控制算法和数字式组合阀的应用,使控制系统具有很高的压差控制精度。Considering the limit of equipment technology of Low Pressure Casting （LPC） to shape the large magnesium alloy components an improved LPC equipment technology, including equipment mechanical part, control system and protective gaseous mixture system has been developed. The melting capacity of 1000 kg of molten magnesium and the maximum weight of 850 kg of the unit casting piece were realized. The protective gaseous mixture system with a good ignition-proof effect can mix SF6, CO2 and compressed air in a certain proportion. The Fuzzy-PID hybrid control technology and the digital assemble valves have been applied in the control system to obtain a high pressure control precision.

关 键 词：镁合金 低压铸造 装备技术中图法 

分 类 号：TG292[金属学及工艺—铸造]