镁基复合材料真空吸渗挤压工艺故障模式分析  

Failure Mode Analysis of Extrusion Directly Following Vacuum Pressure Infi ltration Technique of Magnesium Matrix Composites

作　　者：卫新亮[1] 齐乐华[1] 周计明[1] 关俊涛[1] 马玉钦[1] 

机构地区：[1]西北工业大学机电学院,西安710072

出　　处：《航空制造技术》2016年第3期81-84,共4页Aeronautical Manufacturing Technology

基　　金：国家自然科学基金项目(51275417;51221001);国家863计划(2013AA8011004B)资助

摘　　要：真空吸渗挤压工艺作为一种制备镁基复合材料的新方法,集合金熔化、预制体预热、镁液浇注和挤压浸渗为一体。通过该工艺实现过程及各系统功能的划分,将真空吸渗挤压工艺分为坩锅系统、加热系统、气路系统、成形系统、压力系统、监控系统等部分。根据工艺试验的运行状况,分析了各系统的故障模式及原因,并对故障多发部位的危害性进行了评估。结果表明,对试验系统危害最高的是加热系统,成为影响整个工艺系统的关键,然后是坩锅系统和气路系统。针对各系统的故障特点,提出了改善真空吸渗挤压工艺系统可靠性、安全性的方法和手段。Extrusion directly following vacuum pressure infiltration technique is a kind of new fabrication technique of magnesium matrix composites, which contains the magnesium alloy melting, prefabricated part preheating, pouring, and extrusion infiltration. The technique system can be divided as crucible system, heating system, pneumatic system, molding system, pressure system, and monitoring system according to the division of the implementation process and the system function. The failure mode and its reason of the system are analyzed, and the harmfulness evaluation is completed based on the operation condition of the experiment system. The results show that hazard degree of the heating system is highest and affects the whole system, followed by the crucible system and pneumatic system. Aiming at the fault characteristics of each system, the improved methods of the vacuum infiltration extrusion process system reliability and security are proposed and applied.

关 键 词：镁基复合材料 真空吸渗挤压工艺 故障模式 评估 可靠性 

分 类 号：V250[一般工业技术—材料科学与工程]