Alloys or metallic compositions – Ferrous – Chromium containing – but less than 9 percent
Patent
1989-12-18
1991-01-15
Yee, Deborah
Alloys or metallic compositions
Ferrous
Chromium containing, but less than 9 percent
420110, 148335, C22C 3844, C22C 3846
Patent
active
049852019
ABSTRACT:
A low-alloy steel suitable for use in generator rotors and having a combination of good strength and impact energy with a high magnetic permeability is disclosed. The low-alloy steels are comprised of in weight percent; about 3.5 to 5.25 percent nickel, about 0.75 to 2.0, percent chromium, about 0.3 to 0.8 percent molybdenum, about 0.05 to 0.15 percent vanadium, about 0.1 to 0.28 percent carbon, about 0.03 to 0.1 percent niobium or titanium, and the balance substantially iron, wherein nickel, chromium, and carbon additions are balanced.
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patent: 3954454 (1975-04-01), Shaw
patent: 4820486 (1989-04-01), Shimogori et al.
"Significant Progress in the Development of Large Turbine and Generator Rotors," Boyle, C. J., Curran, R. M. Deforest, D. R., Newhouse, D. L. Proceedings, American Society for Testing and Materials, vol. 62, pp. 1156-1175, 1962.
"Further Progress in the Development of Large Steam Turbine and Generator Rotors," Boyle, C. J., Curran, R. M., Deforest, D. R., Newhouse, D. L. Proceedings, General Electric Corp., 1965.
"Long Term Isothermal Embrittlement in 3.5Ni, 1.75Cr, 0.50Mo, 0.20C Steel," Gould, G. C., Temper Embrittlement in Steel, ASTM Technical Publication 407, pp. 90-105, 1967.
"Temper Embrittlement of Rotor Steels," Newhouse, D. L., Holtz, H. G., Temper Embrittlement in Steel, ASTM Technical Publication 407, pp. 106-126, 1967.
"Standard Specification for Vacuum-Treated Steel Forgings for Generator Rotors," A469, Annual Book of ASTM Standards, pp. 299-302, vol. 105, 1989.
Chang Keh-Minn
Vasatis Ioannis P.
Davis Jr. James C.
General Electric Company
Magee Jr. James
McGinness James E.
Yee Deborah
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