铸造2024，Vol.73Issue(6)：818-824,7.
分层挤出成形陶瓷型壳的表面粗糙度研究
Study on Surface Roughness of Ceramic Shell Prepared by Layered Extrusion Forming Technology
摘要
Abstract
The ceramic shell in investment casting is typically prepared through a series of steps including wax mold pressing,wax mold tree assembly,wax mold stain slurry,mold shell dewaxing,and mold shell roasting.By utilizing layered extrusion forming technology,the ceramic shell can be directly formed,simplifying the process flow of investment casting significantly.This study focused on alumina ceramic paste and investigates the impact of key process parameters(nozzle diameter,extrusion layer height,and forming angle)on the surface roughness of the ceramic shell.A mathematical model for predicting surface roughness was established,and further reduction in surface roughness was achieved through post-treatment coating.Experimental results demonstrated that when using a nozzle diameter of 0.26 mm,an extrusion layer height of 0.2 mm,and a forming angle of 90°,the sample's surface roughness Ra reached its lowest value at(12.9±0.9)μm;after applying the coating treatment,this value was reduced to less than 6.3 μm.关键词
分层挤出成形/工艺参数/表面涂层/陶瓷型壳/熔模铸造Key words
layered extrusion forming/process parameters/surface coating/ceramic shell/investment casting分类
矿业与冶金引用本文复制引用
王盼龙,杨力,杨致远,彭子伟,樊自田..分层挤出成形陶瓷型壳的表面粗糙度研究[J].铸造,2024,73(6):818-824,7.基金项目
国家自然科学基金项目资助(52205365,52275334,51775204). （52205365,52275334,51775204）
