Cast CrMoV steel alloys and the method of formation and use in turbines thereof

US9206704B2 · kind B2 · utility

Assignee

• General Electric Company · US

Inventors

• Deepak Saha · Worcester, US
• Subrahmanyam Thangirala · Schenectady, US
• Jeffrey Michael Breznak · Cohoes, US
• Steven Louis Breitenbach · Scotia, US

Key dates

• Filing date: Jul 11, 2013
• Grant date: Dec 8, 2015
• Expiry date: Jan 25, 2034

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/12
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A cast alloy is generally provided, along with methods of forming the cast alloy and components constructed from the cast alloy (e.g., stationary components of a turbine). The cast alloy can include, by weight, 0.12% to 0.20% carbon, 0.50% to 0.90% manganese, 0.25% to 0.60% silicon, 0.10% to 0.50% nickel, 1.15% to 1.50% chromium, 0.90% to 1.50% molybdenum, 0.70% to 0.80% vanadium, 0.0075% to 0.060% titanium, 0.008% to 0.012% boron, the balance iron, optionally low levels of other alloying constituents, and incidental impurities.