公开(公告)号：EP3365172A1

公开(公告)日：2018-08-29

申请号：EP16787376.9

申请日：2016-10-19

申请人： Salzgitter Flachstahl GmbH

发明人： PALZER, Peter ,  KÖHLER, Kai ,  DEBEAUX, Marc ,  GEORGEOU Zacharias

IPC分类号： B32B15/01 ,  B21C37/06 ,  B21C37/15 ,  B32B1/08 ,  C22C38/04 ,  C22C38/18 ,  C22C38/34 ,  C22C38/38 ,  C22C38/40 ,  C22C38/58 ,  F16L58/00

CPC分类号： F16L9/18 ,  B21C37/154 ,  B21D26/051 ,  B21D26/053 ,  B32B1/08 ,  B32B15/01 ,  B32B15/011 ,  B32B15/013 ,  B32B15/015 ,  C22C38/04 ,  C22C38/08 ,  C22C38/18 ,  C22C38/34 ,  C22C38/38 ,  C22C38/40 ,  C22C38/58 ,  F16L9/02 ,  F16L58/08

摘要： The invention relates to a composite pipe consisting of a carrier pipe (2) and at least one protective pipe (3), wherein the carrier pipe (2) is produced from a non-corrosion resistant steel, which has at least a partially austenitic structure, with the following chemical composition (in wt.%): C: 0.005 to 1.4; Mn: 5 to 35; the remainder being iron including unavoidable elements accompanying steel, with the optional alloying of the following elements (in wt.%): Ni: 0 to 6; Cr: 0 to 9; Al: 0 to 15; Si: 0 to 8; Mo: 0 to 3; Cu: 0 to 4; V: 0 to 2; Nb: 0 to 2; Ti: 0 to 2; Sb: 0 to 0.5; B: 0 to 0.5; Co: 0 to 5; W: 0 to 3; Zr: 0 to 4; Ca: 0 to 0.1; P: 0 to 0.6; S: 0 to 0.2; N: 0.002 to 0.3. The invention also relates to a method for producing such a composite pipe (1) of this type, wherein the carrier pipe (2) and the at least one protective pipe (3) are mechanically or metallurgically connected to one another.