钛合金双安装板静子叶片精锻成形工艺优化

为了缩短双安装板结构的TC4合金低压第二级静子叶片精锻工艺流程,并得到更优的金相组织、力学性能,首次将等温锻造方法引入叶片精锻工艺中,采用一火次等温预锻代替两火次普通预锻.利用刚粘塑性有限元法模拟等温预锻过程,分析了金属流动规律、应变场等的变化情况.结果表明,所成形的等温预锻件应力较低、应变分布比较均匀.经叶片成形工艺试验,得到了采用等温预锻的叶片精锻件,将采用普通预锻的叶片精锻件与之对比,发现采用等温预锻的叶片较采用普通预锻的叶片金相组织均匀性好,而两者的力学性能相当.

Optimization on precision forging process of double-mounting plates stator blade of titanium alloy

To optimize the precision forging process of double mounting plate structure of TC4 alloy low-voltage second stator blade, and get better microstructure, mechanical properties, the isothermal forging was introduced by using one step isothermal preforming instead of two steps general preforming. The simulation of isothermal forging process was conducted by FEM method, and the results show that the isothermal preformation has lower stress and the strain distribution is more uniform. The blade by isothermal preforming has uniform microstructure, and its mechanical properties are equivalent to those of the blade by general preforming.