Hot Extruded High-Temperature Alloy Tubes and Some Mechanical Properties
Autor: | Herbert Aigner, H. Peter Degischer, Erich Hertner |
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Rok vydání: | 1984 |
Předmět: |
Nuclear and High Energy Physics
Materials science 020209 energy Metallurgy Alloy Titanium alloy Nimonic 02 engineering and technology engineering.material Condensed Matter Physics Microstructure Carbide 020303 mechanical engineering & transports Hot working 0203 mechanical engineering Nuclear Energy and Engineering Ultimate tensile strength 0202 electrical engineering electronic engineering information engineering engineering Extrusion |
Zdroj: | Nuclear Technology. 66:54-62 |
ISSN: | 1943-7471 0029-5450 |
DOI: | 10.13182/nt84-a33454 |
Popis: | Seamless hot extruded tubes serve as structural materials of high-temperature gas-cooled reactors and coal conversion systems with exposure temperatures up to 1000/sup 0/C. The tube dimensions ( about130- X 15-mm diam) were produced according to the proposed requirements for methane reformer heat exchangers of nuclear process gas production systems. The most sensitive extrusion parameter is the temperature of the expanded billet at the press, where it should reach 1140 to 1180/sup 0/C depending on the materials investigated: Incoloy-800H, Incoloy-802, Hastelloy-X, Inconel-617, and Nimonic-86. To qualify the extrusion products, the mechanical properties obtained from tensile tests at room temperature and temperatures up to 1000/sup 0/C are compared for tube products. Strengthening effects at 800/sup 0/C are explained by carbide precipitation during the test, especially of alloys 800H and 802. |
Databáze: | OpenAIRE |
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