C - Chemistry – Metallurgy – 21 – D
Patent
C - Chemistry, Metallurgy
21
D
C21D 9/08 (2006.01) C21D 1/25 (2006.01) C21D 6/00 (2006.01) C21D 9/14 (2006.01) C22C 38/04 (2006.01)
Patent
CA 2622410
A method is disclosed for manufacturing cold-formed, in particular cold-drawn, precision steel pipes for use, in particular, as cylinder pipes under pressure, with optimum admixture of one or more alloying elements, as well as impurities which result from the steel-making process. A soldered pipe blank which is seamlessly hot-formed or produced from a rolled strip, and has a defined initial state, is drawn into a finished pipe in one or more passes, and the pipe is tempered before the final pass.
L'invention concerne un procédé de fabrication de tubes d'acier de précision fabriqués à froid, notamment étirés à froid, notamment destinés à être employés en tant que tubes de cylindres sous pression, avec addition optimale d'un ou plusieurs éléments d'alliage et d'impuretés dues à la fusion. Une ébauche de tube continue fabriquée à chaud ou fabriquée par soudage à partir d'une bande à laminer est étirée à partir d'un état initial défini, dans une ou plusieurs phases d'étirage, de manière à obtenir un tube fini, et le tube est soumis à un traitement de finition avant la phase d'étirage finale.
Herzig Sven
Mussmann Wolfgang
See Lothar
Siekmeyer Josef
Fetherstonhaugh & Co.
Mannesmann Praezisrohr Gmbh
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