新型雾化喷嘴的试制研究  

Design and Test on Atomization Particle Nozzle in Spray Forming Equipment

作　　者：王华钰[1,2] 董鹏[1,2] 王宇鑫[1,2] 张瑜[1,2] 杨颖[1,2] 严彪[1,2] 

机构地区：[1]同济大学材料科学与工程学院,上海200092 [2]上海市金属功能材料开发应用重点实验室,上海200092

出　　处：《金属功能材料》2010年第6期44-48,共5页Metallic Functional Materials

基　　金：上海市科委(08dz2201300);上海市科委纳米专项(0752nm004);973项目子课题(2007CB613900)

摘　　要：针对喷射成形的雾化喷嘴,在喷射小孔中引入Laval结构,同时采用双向进气设计。选用Al-Si合金和Finemet合金成分样品,进行新喷嘴应用试验。对比传统直管喷嘴,新型雾化喷嘴获得了更大的气体喷射速度,提高了喷射成形的G/M比。此外,双向进气结构获得了较为理想的气压分布,其雾化效果得到改善,收集到的坯体在形貌、性能上有所突破,特别是Finemet成分合金出现了非晶相。Laval structure and double-structure were brought in the design of the atomization particle nozzle in metal spray forming equipment.Al-Si alloys and Finemet alloy were chosen to test the effect of the new atomization particle nozzle with Laval structure.Compare with traditional straight pipe nozzle,Laval nozzle increases the gas velocity of the jet stream,also the G/M ratio,so that achieve a faster cooling rate during the metal droplet atomization process,therefore the level of the performance of the product has obviously improved.Specially,the amorphous phase existed in Finemet alloy spray formed with this Laval nozzle.

关 键 词：喷射成形 喷嘴 快速凝固 过共晶铝硅合金 

分 类 号：TF37[冶金工程—冶金机械及自动化]