-
公开(公告)号：US20240198446A1
公开(公告)日：2024-06-20
申请号：US18287383
申请日：2022-03-31
Applicant: JFE STEEL CORPORATION
Inventor： Atsushi TAKADA , Atsushi ISHIGAMI , Kazufumi WATANABE
Abstract: A submerged arc welded joint having a weld metal formed by performing submerged arc welding with a heat input of 300 kJ/cm or more. The joint has a weld metal having a specified chemical composition, specified yield strength, and specified tensile strength. The weld metal has a specified absorbed energy vE0, as measured by a V-notch Charpy impact test performed at a testing temperature of 0° C. Ceq is in a range of 0.65 to 1.00, and a is 6.0 or less, as expressed by the equations below.
Ceq=[C]+0.17[Mn]+0.04[Si]+0.025[Ni]+0.2[Cr]+0.25[Mo] (1)
α=30[C]+0.7[Mn]+[Ni]−([Si]+0.5[Cr]+1.5[Mo]) (2)
Here, in the equation (1) and the equation (2), the expression “[element symbol]” denotes a content (mass %) of the corresponding element in the weld metal described above.-
公开(公告)号：US20240051070A1
公开(公告)日：2024-02-15
申请号：US18277833
申请日：2022-02-28
Applicant: JFE STEEL CORPORATION
Inventor： Kazufumi WATANABE , Atsushi TAKADA , Akiyoshi ANDO , Takatoshi OKABE , Keiji UEDA
CPC classification number: B23K35/3073 , B23K9/18 , B23K2103/04
Abstract: A submerged arc welded joint in a high-Mn content steel material that can be formed with reduced occurrence of hot cracking during the welding process and has high strength and excellent cryogenic impact toughness. In the welded joint, the high-Mn content steel material has a chemical composition including, by mass %, C: 0.10 to 0.80%, Si: 0.05 to 1.00%, Mn: 18.0 to 30.0%, P: 0.030% or less, S: 0.0070% or less, Al: 0.010 to 0.070%, Cr: 2.5 to 7.0%, N: 0.0050 to 0.0500%, and O: 0.0050% or less, the balance being Fe and incidental impurities, and a weld metal has a chemical composition including C: 0.10 to 0.80%, Si: 0.05 to 1.00%, Mn: 15.0 to 30.0%, P: 0.030% or less, S: 0.030% or less, Al: 0.100% or less, Cr: 6.0 to 14.0%, and N: 0.100% or less, the balance being Fe and incidental impurities.
-
公开(公告)号：US20210323101A1
公开(公告)日：2021-10-21
申请号：US17270045
申请日：2019-04-01
Inventor： Atsushi TAKADA , Daichi IZUMI , Ryo ARAO , Shohei KOZUKI , Keiji UEDA , Naoya HAYAKAWA , Ken YAMASHITA , Peng HAN
Abstract: Provided is a solid wire for gas metal arc welding, which has a small amount of fume during welding and is suitable as a welding material for high Mn steel materials. The wire has a chemical composition containing, in mass %, C: 0.2% to 0.8%, Si: 0.15% to 0.90%, Mn: 17.0% to 28.0%, P: 0.03% or less, S: 0.03% or less, Ni: 0.01% to 10.00%, Cr: 0.4% to 4.0%, Mo: 0.01% to 3.50%, B: less than 0.0010%, and N: 0.12% or less, with the balance consisting of Fe and inevitable impurities. It may contain at least one selected from V, Ti, Nb, Cu, Al, Ca and REM, if necessary. The wire has excellent manufacturability, can significantly suppress the amount of fume generated during gas metal arc welding, and can easily manufacture a weld joint having high strength and excellent impact toughness at cryogenic temperatures.
-
Patent Agency Ranking
公开(公告)号：US20240131632A1
公开(公告)日：2024-04-25
申请号：US18277837
申请日：2022-02-28
Applicant: JFE STEEL CORPORATION
Inventor： Kazufumi WATANABE , Atsushi TAKADA , Akiyoshi ANDO , Takatoshi OKABE , Keiji UEDA
CPC classification number: B23K35/3073 , B23K9/167 , B23K35/004 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/06 , C22C38/38
Abstract: A TIG welded joint in a high-Mn content steel material that can be formed with reduced occurrence of hot cracking during the welding process and has high strength and excellent cryogenic impact toughness. In the TIG welded joint, the high-Mn content steel material has a chemical composition including, by mass %, C: 0.10 to 0.80%, Si: 0.05 to 1.00%, Mn: 18.0 to 30.0%, P: 0.030% or less, S: 0.0070% or less, Al: 0.010 to 0.070%, Cr: 2.5 to 7.0%, N: 0.0050 to 0.0500%, and O: 0.0050% or less, the balance being Fe and incidental impurities, and a weld metal has a chemical composition including C: 0.10 to 0.80%, Si: 0.05 to 1.00%, Mn: 15.0 to 30.0%, P: 0.030% or less, S: 0.030% or less, Al: 0.100% or less, Cr: 6.0 to 14.0%, and N: 0.100% or less, the balance being Fe and incidental impurities.
-
公开(公告)号：US20240003367A1
公开(公告)日：2024-01-04
申请号：US18253839
申请日：2021-09-09
Inventor： Atsushi TAKADA , Peng HAN , Masamichi SUZUKI
Abstract: Provided is a weld joint having high strength and excellent hot crack resistance and low-temperature toughness. High Ni steel plates containing 6.5 mass % to 10.0 mass % of Ni are welded to form a weld metal to obtain a weld joint. The weld metal has a chemical composition containing Mn: 13.0% to 25.0%, Cr: 3.8% or less, Ni: 1.0% to 12.0%, Mo: 0.1% to 5.0%, N: % or less, and O: 0.100% or less, and the strength of the weld metal is adjusted so that the yield strength BYS of each steel plate and the 0.2% proof stress WPS of the weld metal satisfy
[WPS]≤[BYS]−100 MPa (1)
and the tensile strength BTS of the steel plate and the tensile strength WTS of the weld metal satisfy
[WTS]≤[BTS]+100 MPa (2).-
6.发明公开公开(公告)号：US20240351147A1
公开(公告)日：2024-10-24
申请号：US18684238
申请日：2022-07-28
Applicant: JFE STEEL CORPORATION
Inventor： Akiyoshi ANDO , Atsushi TAKADA , Kazufumi WATANABE , Takatoshi OKABE
IPC: B23K35/30 , B23K9/18 , B23K35/02 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/54 , C22C38/58
CPC classification number: B23K35/3073 , B23K9/186 , B23K35/0261 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/54 , C22C38/58
Abstract: A metal-cored wire for submerged arc welding having a composition including, in mass %: C: 0.20 to 0.80%, Si: 0.15 to 0.90%, Mn: 17.0 to 28.0%, P: 0.030% or less, S: 0.030% or less, Ni: 0.01 to 10.00%, Cr: 0.4 to 4.0%, Mo: 3.50 to 10.00%, B: 0.0010% or less, N: 0.200% or less, and the balance being Fe and incidental impurities.
-
公开(公告)号：US20240227088A9
公开(公告)日：2024-07-11
申请号：US18277837
申请日：2022-02-28
Applicant: JFE STEEL CORPORATION
Inventor： Kazufumi WATANABE , Atsushi TAKADA , Akiyoshi ANDO , Takatoshi OKABE , Keiji UEDA
CPC classification number: B23K35/3073 , B23K9/167 , B23K35/004 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/06 , C22C38/38
Abstract: A TIG welded joint in a high-Mn content steel material that can be formed with reduced occurrence of hot cracking during the welding process and has high strength and excellent cryogenic impact toughness. In the TIG welded joint, the high-Mn content steel material has a chemical composition including, by mass %, C: 0.10 to 0.80%, Si: 0.05 to 1.00%, Mn: 18.0 to 30.0%, P: 0.030% or less, S: 0.0070% or less, Al: 0.010 to 0.070%, Cr: 2.5 to 7.0%, N: 0.0050 to 0.0500%, and O: 0.0050% or less, the balance being Fe and incidental impurities, and a weld metal has a chemical composition including C: 0.10 to 0.80%, Si: 0.05 to 1.00%, Mn: 15.0 to 30.0%, P: 0.030% or less, S: 0.030% or less, Al: 0.100% or less, Cr: 6.0 to 14.0%, and N: 0.100% or less, the balance being Fe and incidental impurities.
-
公开(公告)号：US20250065432A1
公开(公告)日：2025-02-27
申请号：US18293892
申请日：2022-08-29
Applicant: JFE STEEL CORPORATION
Inventor： Akiyoshi ANDO , Atsushi TAKADA , Kazufumi WATANABE , Takatoshi OKABE , Keiji UEDA , Masamichi SUZUKI , Peng HAN
IPC: B23K9/18 , B23K35/30 , B23K103/04
Abstract: Provided is a submerged arc welding method that produces little fume, has good weldability, and is suitable for welding high-Mn-containing steel materials to be used in cryogenic environments. The method includes welding with a combination of a wire having a predetermined chemical composition and flux having a basicity [BL] of 1.5 to 2.4, while adjusting a welding heat input according to a groove cross-sectional area. In this way, a weld metal with high strength and excellent cryogenic impact toughness where the 0.2% proof stress at room temperature is 400 MPa or more and an absorbed energy (vE−196) in the Charpy impact test is 28 J or more can be easily manufactured.
-
-
-
-
-
-
-
Search Results
8
records
(took 0.014 seconds)
