Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Patent
1982-12-22
1984-10-16
Rutledge, L. Dewayne
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
75126C, 75126J, 75128N, 75128W, 148 37, C22C 3806
Patent
active
044772807
ABSTRACT:
A heat resisting steel suitable for use as material of steam turbine parts. The steel has a substantially whole tempered martensite structure and consisting essentially of, by weight, 8 to 13% of Cr, 0.5 to 2% of Mo, 0.02 to 0.5% of V, 0.02 to 0.15% of Nb, 0.025 to 0.1% of N, 0.05 to 0.25% of C, not greater than 0.6% of Si, not greater than 1.5% of Mn, not greater than 1.5% of Ni, 0.0005 to 0.02% of Al, 0.1 to 0.5% of W and the balance substantially Fe, the ratio W/Al between W content and Al content ranging between 10 and 110.
REFERENCES:
patent: 2848323 (1958-08-01), Harris et al.
patent: 2880085 (1959-03-01), Kirby et al.
patent: 3139337 (1964-06-01), Boyle et al.
patent: 3767390 (1973-10-01), Hahn
Kirihara Seishin
Kuriyama Mitsuo
Sasaki Ryoichi
Shiga Masao
Yoshioka Takatoshi
Hitachi , Ltd.
Rutledge L. Dewayne
Yee Debbie
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