蒸気タービンローター用1Cr-Mo-V鍛鋼の実機条件下クリープ疲労寿命の予測

抄録

Isothermal long term creep-fatigue and combined temperature-strain cycling tests under simulated thermal stresses of high temperature components were carried out with newly developed testing machines suitable to long running. Materials examined were three heats of turbine rotor 1Cr-Mo-V forged steel with different impurity contents. The obtained results were evaluated by the life prediction method proposed by the authors which was based on the linear damage rule looking at the creep rupture ductility of materials after long exposure at high temperatures.