| 摘要 |
This invention relates to a production method of a moving vane member having high durability and to the moving vane member. An impeller in which tensile residual stress remains is rotated at a rotating speed higher than an operation speed. Then, a high stress portion inside the impeller undergoes plastic deformation due to centrifugal force F. As a result, compressive residual stress remains in the high stress portion after the rotation is stopped, and the tensile residual stress is eliminated. Therefore, repeated tensile stress acting on the high stress portion can be reduced, and an impeller having higher durability can be acquired.
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