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A cryogenic treatment is the process of treating workpieces to cryogenic temperatures (typically around -300°F / -184°C, or as low as −190 °C (−310 °F)) in order to remove residual stresses and improve wear resistance in steels and other metal alloys, such as aluminum.
Cryogenic hardening is a cryogenic treatment process where the material is cooled to approximately −185 °C (−301 °F), typically using liquid nitrogen. It can have a profound effect on the mechanical properties of certain steels , provided their composition and prior heat treatment are such that they retain some austenite at room temperature.
This is a list of Superfund sites in Oklahoma designated under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) environmental law. The CERCLA federal law of 1980 authorized the United States Environmental Protection Agency (EPA) to create a list of polluted locations requiring a long-term response to clean up hazardous material contaminations. [1]
Cryogenic grinding of plant and animal tissue is a technique used by microbiologists. Samples that require extraction of nucleic acids must be kept at −80 °C or lower during the entire extraction process. For samples that are soft or flexible at room temperature, cryogenic grinding may be the only viable technique for processing samples. [2]
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Tulsa, Oklahoma 74103 United States: Circulation: 33,565 Daily 36,484 Sunday (as of 2023) [1] ISSN: 2330-7234: Website: tulsaworld.com: The Tulsa World is an American ...
This was one of many innovations in the OHC six-cylinder engine. The crankshaft was strengthened by Tufftriding in a unique salt bath for two hours at 1,025 °F (552 °C) that, according to Kaiser-Jeep, increased engine life by 50% and also made the journal surfaces hard enough to be compatible with heavy-duty tri-metal engine bearings. [32]
The Tulsa Tribune was an afternoon daily newspaper published in Tulsa, Oklahoma from 1919 to 1992. Owned and run by three generations of the Jones family, the Tribune closed in 1992 after the termination of its joint operating agreement with the morning Tulsa World .