消失模液锻中气隙压力和气流速度的计算分析  

Computational analysis on airflow pressure and airflow velocity in lost foam liquid forging

作　　者：宾仕博[1] 邢书明[1] 鲍培玮[1] 郭莉军[1] 

机构地区：[1]北京交通大学机械与电子控制工程学院,北京100044

出　　处：《北京交通大学学报》2013年第6期34-38,共5页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：国家自然科学基金资助项目(51275031)

摘　　要：通过计算分析了消失模液锻制备颗粒增强金属基复合材料中,附带的增强颗粒泡沫载体与金属液作用后产生的气隙压力和气流速度,然后在消失模液锻TiC/ZG270-500实验中测量气隙压力和气流速度值,并探讨液锻工艺参数对气隙压力和气流速度的影响规律.实验结果表明:气隙压力和气流速度随充型速度、浇注温度、内浇口与排气孔横截面积比呈递增趋势,但均不随成形压力变化.此外,气流速度还随排气孔与型腔横截面积比增大而增大,气流速度随工艺参数变化趋势较平缓.The airflow pressure and airflow velocity generated by the interaction between foam carrier with particles and liquid steel were analyzed during the preparation of particle reinforced steel matrix composite （PRSMC） by lost foam liquid forging （LFLF）. Then both of them were measured practi- cally in the experiment of TiC reinforced ZG270-500 by LFLF and the effect of technological parame- ters on airflow pressure and airflow velocity were also investigated. The experimental results show that both the airflow pressure and airflow velocity present an increase with the increment of mould filling speed, pouring temperature, and the cross-section ratio of ingate to exhaust orifice, but change little with forming pressure. Besides, the airflow velocity also increases with the cross-section ratio of ex- haust orifice to metal cavity and the changes with technological parameters are more smooth. The ex- perimental results go well with theoretical derivations.

关 键 词：消失模液锻 颗粒增强金属基复合材料 泡沫载体 气隙压力 气流速度 

分 类 号：TG21[金属学及工艺—铸造] TG249.2