Optimization of the Casting Process for Turbine Housing of High-Ni Austenitic Ductile Iron
Author of the article:ZHANG Tongxian
Author's Workplace：Kehua Holdings Co.,Ltd.,Changzhou 213000,China
Key Words：turbine housing high nickel austenitic ductile iron casting gating system numerical simulation
Abstract：
When the high nickel austenitic ductile iron turbine housing was pouring vertically,the solidification and shrinkage capacity of the castings were poor and the yield was low,and the porosity defects on the tube wall of the casting was easy to form.In combination with casting defects characteristics and distribution,the Magma software was used to adjust casting location and analyze the influence of different casting locations on casting solidification process.According to the theory of sequential solidification,the feasibility of the process was determined and the casting process design scheme was optimized.The results show that the scheme solves the porosity defects of high nickel turbine shell castings,and improves the process yield and yield of castings greatly,with remarkable economic benefits.
