Mitsubishi Hitachi Power Systems, Ltd. (MHPS) has established an alloy design method
capable of reducing the time and cost required to develop Ni-base superalloys used in thermal
power plants, as well as mitigating the risks resulting from the trial manufacturing of large items.
By using this method, we have developed a highly-manufacturable material available for
800°C-class steam turbines, and large Ni-base disk material used for gas turbines. An examination
of their applicability to actual equipment is now under way. By controlling their metallographic
structure, we have also developed a manufacturing process to dramatically improve the
manufacturability of high-strength superalloys. Based on this process, the applicability of
high-strength wrought alloy for aircraft engines to thermal power plants is presently under
examination.
