43_汽轮机叶片材料热变形行为及制坯工艺参数优化.pdf

Vol.45 No 1 JOURNAL OF XI’AN JIAOTONG UNIVERSITY Jan. 2011 DOI: CNKI:61-1069/T2058.010 TG 317 A 0253-987X(2011)01-0000-00 Thermal Deformation Behavior of 43 Turbine Blade Material and the Forging Blank Parameter Optimization ZHONG JieGUO ChengYUE PengLIU Wenwen (School of Mechanical Engineer, Xi ’an Jiaotong University, Xi ’an 710049 China) Abstract: In order to solve the problem of materials thermal deformation in high-quality blade forging, the high temperature constitutive equation for a 43 turbine blade material was established by thermal simulation experiments and data regression. Using the established equation, the forging process was analyzed by orthogonal test and numerical simulation software DEFOEM-3D. The calculation results show that the elevated temperature flow stress of the material accords with hyperbolic sine function. The analyzed results show that the effect of the boss diameter, the fillet near blade root, the distance between the center line of blank and mold, and the fillet near blade shroud on the forging quality is successively from large to small. The practical production shows that the forging process using the optimized parameters can not only lower the load, hold the tolerance within 3mm, and reduce forging times, but also