No.3 Development of MHI's Own New Material
Regarding the material for GT hot parts, IN738LC was a popular Ni-base super alloy for the rotating blade, which requires superiority in creep strength, thermal fatigue life and high cycle fatigue strength, and Co-based X-45 or ECY-768 were regularly used for the stationary vanes for such high thermal fatigue strength and better weldability. For the combustor, Hastelloy X is the most famous material for its weldability, and anti-corrosive and anti-oxidization characteristics.
MHI decided to develop new material superior to these existing popular materials and, as a result, MGA1400 for the blade, MGA2400 for the vane, and Tomilloy for the combustor were developed. MGA1400 exhibits the same high temperature creep strength in 30 deg. C higher point than that of IN738LC, and if it is incorporated for the Directionally Solidified (DS) blade, it is 50 deg. C higher. Ni-based MGA2400 has the same high temperature creep strength in 20 deg. C higher than that of ECY-768, while maintaining weldability. (Click here)
Actual application of these new materials is not an easy process, requiring various tests during the R&D stage. In addition, MHI also applies the new materials to actual engines and verifies performance over long operations. MF-111 is the engine MHI has been applying these new materials to since 1994, together with Thermal Barrier Coating (TBC). And following excellent results, MHI started to apply the materials to both the F&G series. Currently, MGA1400 and MGA2400 are playing important rolls in the improvement of hot parts life, after being applied to the up-rated F series. (Click here)
MHI is also active in R&D for the casting process, such as with Directionally Solidified (DS) and Single Crystal (SC) processing, and improving the technology by casting through a company 100% owned by MHI. (Click here)
MHI decided to develop new material superior to these existing popular materials and, as a result, MGA1400 for the blade, MGA2400 for the vane, and Tomilloy for the combustor were developed. MGA1400 exhibits the same high temperature creep strength in 30 deg. C higher point than that of IN738LC, and if it is incorporated for the Directionally Solidified (DS) blade, it is 50 deg. C higher. Ni-based MGA2400 has the same high temperature creep strength in 20 deg. C higher than that of ECY-768, while maintaining weldability. (Click here)
Actual application of these new materials is not an easy process, requiring various tests during the R&D stage. In addition, MHI also applies the new materials to actual engines and verifies performance over long operations. MF-111 is the engine MHI has been applying these new materials to since 1994, together with Thermal Barrier Coating (TBC). And following excellent results, MHI started to apply the materials to both the F&G series. Currently, MGA1400 and MGA2400 are playing important rolls in the improvement of hot parts life, after being applied to the up-rated F series. (Click here)
MHI is also active in R&D for the casting process, such as with Directionally Solidified (DS) and Single Crystal (SC) processing, and improving the technology by casting through a company 100% owned by MHI. (Click here)
Business contact: Network
Business Segment: Power Systems
