Huntington Alloys Corporation

Inco Alloys International, Inc.

The International Nickel Company, Inc.

Edward F Clatworthy

Darrell F Smith, Jr

Herbert L Eiselstein

Donald Edward Wenschhof, Jr

Jerry A Harris

Pasupathy Ganesan

Jeffrey M Davidson

Thomas H Bassford

Stephen Floreen

David G Tipton

Nickel-base alloys containing special and correlated percentages of chromium, iron, molybdenum, titanium, columbium, aluminum etc. (i) provide an attractive combination of strength, ductility, resistance to environmental media and other desirable characteristics, (ii) can be processed by cold working and age hardening to achieve yield strengths of 150,000 psi (1034 MPa) to 200,000 psi (1379 MPa) together with tensile elongations of 10% to 20%, (iii) are resistant to such corrosive media as hydrogen sulphide and acid chloride solutions, and to hydrogen embittlement, and (iv) are useful for, inter alia, petroleum production tubing and sulfur dioxide gas scrubber applications.

Corrosion resistant high-strength nickel-base alloy

A process for heat treating alloy objects which comprises solution treating a nickel-base alloy containing chromium, molybdenum, copper, titanium, aluminum and iron at a temperature in excess of 955.degree. C. and then aging the alloy without intervening cold work at a temperature in the range of 700.degree. C. to 720.degree. C. This treatment provides non-cold worked structure which is tough, not susceptible to stress corrosion cracking in a test environment simulating a sour gas well environment and which exhibits high level of fracture energy in a slow strain rate tensile test in that environment.

Heat treated alloy

A nickel-chromium-molybdenum base alloy characterised by exceptional structural stability when exposed at temperatures upwards of 1800.degree. F. for prolonged periods of time, such as 10,000 hours.

High temperature nickel base alloy with improved stability

Directed to an overaging heat treatment applied to age-hardenable nickel-iron controlled expansion alloys so as to contribute high notch strength at temperatures on the order of about 1000.degree. F. thereto.

Heat treatments of low expansion alloys

Directed to an overaging heat treatment applied to age-hardenable nickel-cobalt-iron controlled expansion alloys so as to contribute high notch strength at temperatures on the order of about 1000.degree. F. thereto.

An apparatus (10) and method for fabricating tubes (26) from powders (32). A retractable, rotating mandrel (18) is disposed within a powder hopper (12) and circumscribed by a plurality of swaging dies (20). A flexible iris (14), disposed between the hopper (12) and the dies (20), reduces powder (32) loss. As the mandrel (18) is withdrawn from the hopper (12), the dies (20) alternatingly expand and contract compacting the powder (32) in a compaction zone (48) about the mandrel (18) to form a tube (26). The resultant continuous tube (26) is withdrawn along with the mandrel (18).

Apparatus and method for fabricating tubes from powder

Directed to a nickel-chromium-molybdenum alloy containing about 1.3% to about 3% of aluminum plus titanium, which is particularly useful where corrosion resistance, strength and ductility are required, such as in oil well tubing.

Tube material for sour wells of intermediate depths

Nickel-iron base alloy characterized by controlled thermal expansion coefficient and inflection temperature and by desirable high strength in age-hardened condition has composition specially restricted to overcome detrimental sensitivity to stress-concentrating geometries and aid resistance to long-enduring stress in heated oxidizing atmospheres. The alloy contains, by weight, 34% to 55.3% nickel, up to 25.2% cobalt, 1% to 2% titanium, 1.5% to 5.5% of columbium plus 1/2 the weight percent of any tantalum, up to 1% chromium, not more than 0.2% aluminum and the balance essentially iron.

Heat resistant low expansion alloy

Iron-nickel-chromium alloy wherein other elements, including columbium and titanium, are specially controlled has high strength and long-time stability for extended service at intermediate temperatures, such as automotive turbine service for 5000 hours at 1200.degree. F.

Intermediate temperature service alloy

Nickel-iron and nickel-iron-cobalt alloys contain chromium and gamma-prime hardening elements in proportions balanced according to special compositional relationships providing desired thermal expansion, inflection temperature, strength and ductility characteristics, particularly including notch strength needed in machinery and structures subjected in use to varying temperatures and thermal gradients where operating temperatures become elevated above 500.degree. F.

Production of low expansion superalloy products

Low expansion superalloy

Matrix-stiffened nickel-iron-chromium-columbium solid-solution alloy with excellent metallurgical stability has heat-resistant and corrosion resistant characteristics especially useful for articles needed to sustain stress in long-time service at elevated temperatures, particularly including superheater tubing in steam power plants. Alloy also has good workability and thermal response characteristics for commercial production of heat-treated wrought products.

Growing community of inventors

Huntington, WV, United States of America

Edward F Clatworthy