-
公开(公告)号：US20180104761A1
公开(公告)日：2018-04-19
申请号：US15558745
申请日：2016-06-24
Applicant: NETUREN CO., LTD.
Inventor： Takashi HORINO , Akira TERAJIMA , Fumiaki IKUTA , Hiroki INOUE
Abstract: A direct resistance heating simulation method is provided. In this method, a welding region and its peripheral region of steel sheets to be welded by a pair of electrodes are divided into a plurality of elements. A coupled analysis is performed such that a temperature, a metal structure, stress and strain at each element are determine in a mutually associated manner based on Joule loss obtained through a current analysis and a magnetic field analysis for each element. The coupled analysis is repeated to predict an effect of one or more parameters, including at least one of a frequency, a magnitude and an application time of electric current to be applied to the electrodes, a cooling time, a pressure applied from the electrodes to the steel sheets and a shape of the electrodes, on welding quality after a post-heating by direct resistance heating and to improve weld strength.
-
公开(公告)号：US20190218635A1
公开(公告)日：2019-07-18
申请号：US16361813
申请日：2019-03-22
Applicant: NETUREN CO., LTD.
Inventor： Akira TERAJIMA , Kazuhiro KAWASAKI , Fumiaki IKUTA , Yasuyuki KOYATA , Yoshitaka MISAKA
IPC: C21D1/18 , C22C38/00 , C21D6/00 , B23K11/25 , B23K11/24 , C21D9/50 , B23K11/11 , C22C38/02 , C22C38/04
CPC classification number: C21D1/18 , B23K11/115 , B23K11/24 , B23K11/25 , B23K2101/18 , B23K2103/04 , C21D6/005 , C21D6/008 , C21D9/50 , C22C38/002 , C22C38/02 , C22C38/04
Abstract: Object of the present invention is to provide a welding method prevented the fracture at the spot welding zone by recovering the strength of a spot welding zone, namely, the ductility and the toughness in the spot welding zone, and a weld structure manufactured by the method. In the welding method, a spot welding zone provided with a weld nugget is formed by conducting spot welding on the heat treated steel sheets in a stack; the spot welding zone is tempering treated by the high-frequency electrical current application to make the weld nugget have a hardness of 150% or less of the hardness of the heat treated steel sheets, and the heat affected zone surrounding the weld nugget is made to have a hardness of 30% to 90% of the hardness at the weld nugget before the tempering treatment by the high-frequency electrical current application.
-
公开(公告)号：US20160076117A1
公开(公告)日：2016-03-17
申请号：US14848807
申请日：2015-09-09
Applicant: NETUREN CO., LTD.
Inventor： Akira TERAJIMA , Kazuhiro KAWASAKI , Fumiaki IKUTA , Yasuyuki KOYATA , Yoshitaka MISAKA
CPC classification number: C21D1/18 , B23K11/115 , B23K11/24 , B23K11/25 , B23K2101/18 , B23K2103/04 , C21D6/005 , C21D6/008 , C21D9/50 , C22C38/002 , C22C38/02 , C22C38/04
Abstract: Object of the present invention is to provide a welding method prevented the fracture at the spot welding zone by recovering the strength of a spot welding zone, namely, the ductility and the toughness in the spot welding zone, and a weld structure manufactured by the method. In the welding method, a spot welding zone provided with a weld nugget 13a is formed by conducting spot welding on the heat treated steel sheets in a stack; the spot welding zone is tempering treated by the high-frequency electrical current application to make the weld nugget have a hardness of 150% or less of the hardness of the heat treated steel sheets, and the heat affected zone surrounding the weld nugget is made to have a hardness of 30% to 90% of the hardness at the weld nugget before the tempering treatment by the high-frequency electrical current application.
Abstract translation: 本发明的目的是提供一种通过回收点焊区域的强度即点焊区域的延展性和韧性以及通过该方法制造的焊接结构来防止点焊区域的断裂的焊接方法 。 在焊接方法中，通过在堆叠处理的热处理钢板上进行点焊而形成设置有焊点13a的点焊区域， 点焊区域通过高频电流施加回火处理，使得焊点的硬度达到热处理钢板硬度的150％以下，焊接点周围的热影响区域为 在通过高频电流施加回火处理之前，在焊接熔核处具有硬度为30％至90％的硬度。
-
-
Search Results
3
records
(took 0.011 seconds)
