摘要
针对大尺寸空心涡轮叶片一体化铸型成形中存在严重的颗粒偏析现象,研究了陶瓷浆料的固化温度、固化时间以及硅溶胶含量对陶瓷铸型颗粒偏析的影响规律。研究表明:在固化温度30℃、固相含量60%时,试样的密度差值降至最低,颗粒偏析影响最小,陶瓷铸型的室温强度可达35 MPa以上;当硅溶胶的质量分数为20%时,陶瓷浆料的黏度降至最低,且浆料的流变性能和充型效果较好。经X射线扫描,制备的大尺寸陶瓷铸型结构完整、形态良好,验证了优化工艺参数的合理性。
Aiming at the serious particle segregation in the integrated mold forming of large-size hollow turbine blade,the effects of curing temperature,curing time and silica sol content of ceramic slurry on particle segregation in ceramic mold were studied.The results showed that when the curing temperature is 30℃and the solid content is 60%,the density difference of the sample is the lowest,the influence of particle segregation is the smallest,and the room temperature strength of the ceramic mold reaches more than 35 MPa.When the mass fraction of silica sol is 20%,the viscosity of ceramic slurry decreases to the lowest,and the rheological properties and filling effect of slurry are better.Tested by X-ray scanning,the large-size ceramic mold has complete structure and good shape,which verifies the rationality of the optimized process parameters.
作者
鲁中良
刘亮杰
陈义
苗恺
李涤尘
LU Zhongliang;LIU Liangjie;CHEN Yi;MIAO Kai;LI Dichen(State Key Laboratory for Manufacturing System Engineering,School of Mechanical Engineering,Xi′an Jiaotong University,Xi′an 710049,China)
出处
《电加工与模具》
2021年第6期62-67,共6页
Electromachining & Mould
基金
国家科技重大专项(2017-VII-0008-0101)
中国航空发动机集团产学研合作项目(HFZL2019CXY023)。
关键词
涡轮叶片
一体化铸型
颗粒偏析
抗弯强度
turbine blade
integral mold
particle segregation
bending strength
