Steam turbine blades raug rau siab -kub, siab -sab siab, muaj kev khoov tseem ceeb thaum lub sijhawm ua haujlwm. Tsiv cov hniav ua haujlwm ntawm kev kub ceev kuj dais siab centrifugal rog. Hniav nyob rau hauv cov av ntub dej, tshwj xeeb tshaj yog nyob rau theem kawg, yuav raug rau electrochemical corrosion thiab dej tee yaig, thaum tsiv cov hniav kuj tiv thaiv complex kev co quab yuam. Yog li ntawd, cov hlau siv rau turbine hniav yuav tsum ua tau raws li cov hauv qab no:
1. Txaus chav tsev kub thiab siab -kub txhua yam khoom thiab creep kuj;
2. Kev ua haujlwm siab rau kev co damping;
3. High structural stability;
4. Zoo corrosion thiab yaig tsis kam;
5. Kev ua tau zoo.