Title:
オーステナイトステンレス鋼管の製造方法
Document Type and Number:
Japanese Patent JP7058601
Kind Code:
B2
Abstract:
A process of producing an austenitic stainless steel tube comprises the steps of:a) producing an ingot or a continuous casted billet of the austenitic stainless steel,b) hot extruding the ingot or the billet obtained from step a) into a tube,c) cold rolling the tube obtained from step b) to a final dimension thereof.The outer diameter D of the cold rolled tube is 70-250 mm and the thickness t thereof is 6-25 mm, and the cold rolling step is performed such that the following formula is satisfied:(2.5×Rc+1.85×Rh−17.7×Q)=(Rp0.2target+49.3−1073×C−21Cr−7.17×Mo−833.3×N)±Z (1)wherein Rp0.2target is targeted yield strength and is 750≤Rp0.2target≤1000 MPa, 30≤Rc≤75%, 50%≤Rh≤90%, 1≤Q≤3.6, and Z is 65.
Inventors:
Quaneberg, Erik
Svedberg, Daniel
Svedberg, Daniel
Application Number:
JP2018534663A
Publication Date:
April 22, 2022
Filing Date:
December 28, 2016
Export Citation:
Assignee:
Sandvik Intellectual Property Actie Volag
International Classes:
B21B21/00; B21B3/02; C22C38/00; C22C38/58; C22C38/60
Domestic Patent References:
| JP2010163669A | ||||
| JP2015506415A |
Foreign References:
| CN104962836A | ||||
| WO2012128258A1 |
Attorney, Agent or Firm:
Sonoda/Kobayashi Patent Business Corporation