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采用金属型、石膏芯复合铸造工艺生产液力变矩器铝涡轮，使涡轮铸造表面的尺寸精度达到±0.5mm，流道表面粗糙度Ra＜6．3μm。通过石膏芯的修整，保证了叶片根部圆角的形成，这对提高铸造铝合金涡轮的质量、改善液力变矩器的液力传动质量有着重要的意义。
The use of metal, gypsum core composite casting process of torque converter produced aluminum turbine, the turbine casting surface dimensions accuracy of ± 0.5mm, the flow channel surface roughness Ra <6.3μm. Through the gypsum core dressing, to ensure the formation of the blade root fillet, which improve the quality of cast aluminum alloy turbine to improve the hydrodynamic torque converter torque transmission is of great significance.