Mitsubishi Heavy Industries Limited

Mitsubishi Jukogyo Kabushiki Kaisha

Koji Fujimoto

Toshio Yonezawa

Toshihiko Iwamura

Koji Takahashi

Ikumasa Koshiro

Takashi Shige

Hiroshi Kanasaki

Mitsuhiro Nakamura

Kazuhide Ajiki

Shizuo Nakada

An austenitic stainless steel having resistance to neutron-irradiation-induced deterioration obtained by subjecting a stainless steel consisting of not more than 0.08% by weight of C, not more than 2.0% by weight of Mn, not more than 1.5% by weight of Si, not more than 0.045% by weight of P, not more than 0.030% by weight of S, 8.0 to 22.0% of by weight Ni, 16.0 to 26.0% of by weight Cr and the balance as Fe; to thermal solid solution treatment at a temperature of 1,000&deg; C. to 1,180&deg; C. and then subjecting the so-treated steel to aging treatment at a temperature in the range of 600&deg; C. to 750&deg; C.

Austenitic stainless steel resistant to neutron-irradiation-induced deterioration and method of making thereof

This invention relates to a spray coating powder material which, when applied to gas turbines using a crude low-quality fuel oil as fuel, has sufficiently higher corrosion resistance to sulfur, vanadium, sodium and other substances that accelerate corrosion in a high-temperature service environment, than conventional materials such as Ni-50 Cr and MCrAlY materials, as well as high-temperature components coated therewith. Specifically, this invention relates to a spray coating powder material comprising, on a weight percentage basis, greater than 45% and up to 60% of chromium, 5 to 15% of aluminum, 0.5 to 10% of zirconium, and the balance comprising cobalt or iron, or both, and incidental impurities, as well as high-temperature components coated therewith. This material can yield a sprayed coating having high corrosion resistance to sulfur, vanadium, sodium and other substances that accelerate corrosion in a high-temperature service environment.

Spray coating powder material and high-temperature components coated therewith

High-nickel austenitic stainless steel resistant to degradation by

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Takasago, Japan

Koji Fujimoto