Abrégé

A method for preparing a 1Cr25Ti high-chromium ferrite stainless steel seamless pipe, comprising steps of tube blank heating, punching, finishing, cold drawing, thermal treatment, refinishing, and finished tube inspection, wherein cold drawing comprises: first performing low-temperature baking on a tubular billet obtained in the finishing step to obtain a tubular billet to be cold-drawn; then performing low-speed small-deformation cold drawing on the tubular billet to be cold-drawn; entering cold drawing of the next cycle in the same manner after cold drawing is completed until the wall thickness required by a process is met, and then obtaining a tube to be subjected to thermal treatment.

Classes IPC  ?

• B21C 37/06 - Fabrication de tôles, barres, fils, tubes ou profilés métalliques ou de produits semi-finis similaires, non prévue ailleursFabrication de tubes de forme particulière des tubes ou tuyaux métalliquesProcédés combinés pour fabriquer des tubes, p. ex. pour fabriquer des tubes à parois multiples
• B21B 19/04 - Laminage de matériaux de structure pleine, c.-à-d. non évidéePerçage
• C22C 38/18 - Alliages ferreux, p. ex. aciers alliés contenant du chrome
• C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
• C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
• C22C 38/28 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du titane ou du zirconium

Abrégé

Provided is a preparation method of a 1Cr17 ferritic stainless steel pipe. The method comprises the following steps: preheating a 1Cr17 ferritic stainless steel pipe billet and keeping at the temperature; perforation to obtain a hot-rolled perforated tube, wherein the chemical element and mass % ratio of the steel pipe is as follows: 0.08-0.12% of carbon, ≤0.04% of silicon, ≤0.70% of manganese, 16.40-17.00% of chrome, ≤0.035% of phosphorus, ≤0.010% of sulfur and the balance iron; performing thermal refining on the obtained hot-rolled perforated pipe to obtain a perforated pipe; performing normal-temperature cold rolling on the obtained perforated pipe to obtain a cold rolled pipe; and performing thermal treatment on the cold rolled pipe, cooling the same to normal temperature after thermal treatment is finished, and a finished product is obtained.

Classes IPC  ?

• B21C 37/06 - Fabrication de tôles, barres, fils, tubes ou profilés métalliques ou de produits semi-finis similaires, non prévue ailleursFabrication de tubes de forme particulière des tubes ou tuyaux métalliquesProcédés combinés pour fabriquer des tubes, p. ex. pour fabriquer des tubes à parois multiples
• B21B 19/04 - Laminage de matériaux de structure pleine, c.-à-d. non évidéePerçage
• C22C 38/18 - Alliages ferreux, p. ex. aciers alliés contenant du chrome
• C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
• C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
• C22C 38/28 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du titane ou du zirconium