公开(公告)号：EP1717328B1

公开(公告)日：2018-09-12

申请号：EP04801614.1

申请日：2004-12-01

申请人： JFE Steel Corporation

发明人： MIYATA, Yukio ,  KIMURA, Mitsuo ,  ITAKURA, Noritsugu ,  MASAMURA, Katsumi

IPC分类号： C22C38/06 ,  C22C38/40 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/02 ,  C22C38/04 ,  C22C38/44 ,  C21D6/00 ,  C21D9/14 ,  C21D1/25 ,  C22C38/00

CPC分类号： C22C38/44 ,  C21D1/25 ,  C21D6/004 ,  C21D9/14 ,  C22C38/002 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/40 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  Y10T428/13

摘要： A martensitic stainless steel pipe having a heat-affected zone with high resistance to intergranular stress corrosion cracking is provided. In particular, the martensitic stainless steel pipe contains less than 0.0100% of C; less than 0.0100% of N; 10% to 14% of Cr; and 3% to 8% of Ni on a mass basis. Alternatively, the martensitic stainless steel pipe may further contain Si, Mn, P, S, and Al within an appropriate content range. The martensitic stainless steel pipe may further contain one or more selected from the group consisting of 4% or less of Cu, 4% or less of Co, 4% or less of Mo, and 4% or less of W and one or more selected from the group consisting of 0.15% or less of Ti, 0.10% or less of Nb, 0.10% or less of V, 0.10% or less of Zr, 0.20% or less of Hf, and 0.20% or less of Ta on a mass basis. The content C sol defined by the following equation is equal to less than 0.0050%: C sol = C - 1/3 × C pre , wherein C pre = 12.0 {Ti/47.9 + 1/2 (Nb/92.9 + Zr/91.2) + 1/3 (V/50.9 + Hf/178.5 + Ta/180.9) - N/14.0} or C pre = 0 when C pre

公开(公告)号：EP2857119B1

公开(公告)日：2018-05-02

申请号：EP12877718.2

申请日：2012-05-29

申请人： JFE Steel Corporation

发明人： KATSUMURA, Tatsuro ,  ITAKURA, Noritsugu ,  NAMBU, Seiichiro ,  ISHIKAWA, Kazutoshi

IPC分类号： B21D39/20 ,  B21D41/02

CPC分类号： B21D39/20 ,  B21C1/24 ,  B21C3/16 ,  B21D41/026 ,  G06F17/5018

摘要： In Tube expanding manufacturing using only an internal tool, it conventionally takes a long time and is expensive to determine manufacturing conditions. Thus specifically, through a tube expanding processing simulation, a workpiece shape in a state where a tip of a workpiece 10 has advanced by 1.0 m or more after passing through a shoulder portion 3 of a tool 1 is evaluated. A hollow piece shape and a tool shape such that the external diameter is within ±1% of the target, the thickness is within ±7.5% of the target, and the internal gap between the hollow piece and the tool is 1.0 mm or less are obtained by repeated calculation, and thereby actual tube expanding manufacturing conditions are determined.

公开(公告)号：EP2857119A1

公开(公告)日：2015-04-08

申请号：EP12877718.2

申请日：2012-05-29

申请人： JFE Steel Corporation

发明人： KATSUMURA, Tatsuro ,  ITAKURA, Noritsugu ,  NAMBU, Seiichiro ,  ISHIKAWA, Kazutoshi

IPC分类号： B21D39/20 ,  B21D41/02

CPC分类号： B21D39/20 ,  B21C1/24 ,  B21C3/16 ,  B21D41/026 ,  G06F17/5018

摘要： In Tube expanding manufacturing using only an internal tool, it conventionally takes a long time and is expensive to determine manufacturing conditions. Thus specifically, through a tube expanding processing simulation, a workpiece shape in a state where a tip of a workpiece 10 has advanced by 1.0 m or more after passing through a shoulder portion 3 of a tool 1 is evaluated. A hollow piece shape and a tool shape such that the external diameter is within ±1% of the target, the thickness is within ±7.5% of the target, and the internal gap between the hollow piece and the tool is 1.0 mm or less are obtained by repeated calculation, and thereby actual tube expanding manufacturing conditions are determined.

摘要翻译： 在仅使用内部工具的管扩径制造中，通常需要很长时间并且确定制造条件是昂贵的。 因此，通过管扩径处理模拟，评价在通过工具1的肩部3之后，工件10的前端前进1.0m以上的状态下的工件形状。 中空件形状和工具形状使得外径在目标的±1％以内，厚度在目标的±7.5％以内，中空件与工具之间的内部间隙为1.0mm以下 通过重复计算获得，从而确定实际的管膨胀制造条件。