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Patent Agency Ranking
公开(公告)号：US20180051975A1
公开(公告)日：2018-02-22
申请号：US15554319
申请日：2016-03-02
Applicant: NETUREN CO., LTD. , OITA UNIVERSITY
Inventor： Yoshitaka MISAKA , Kazuhiro KAWASAKI , Kenta SAKURAI , Yuji GOTOH
Abstract: An apparatus is provided to measure a depth of a hardened layer formed at a surface layer of a quenched workpiece. The apparatus includes an exciting coil configured to generate a magnetic flux to magnetize the workpiece and a detecting coil configured to detect the magnetic flux generated by the exciting coil. The exciting coil has a U-shaped excitation core portion and an excitation coil portion wound on the excitation core portion. The excitation core portion is arranged such that distal ends of magnetic poles of the excitation core portion face the workpiece. The detecting coil has a detection core portion and a detection coil wound on the detection core portion. The detection core portion is arranged between the magnetic poles of the excitation core portion and along a surface of the workpiece.
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公开(公告)号：US20180155816A1
公开(公告)日：2018-06-07
申请号：US15569988
申请日：2016-04-27
Applicant: KEIO UNIVERSITY , NETUREN CO., LTD.
Inventor： Jun KOMOTORI , Shumpei OTA , Kengo FUKAZAWA , Yoshitaka MISAKA , Kazuhiro KAWASAKI
IPC: C23C8/24
Abstract: An object of the present invention is to provide, as a simple method, a surface nitriding treatment method of a titanium material, forming a hardened nitrided layer excellent in abrasion resistance on the surface of a titanium material in a shorter time. In order to achieve the object, the present invention adopts a surface nitriding treatment method of a titanium material, wherein a hardened nitrided layer is formed on the surface of the titanium material, by blowing nitrogen gas at a flow rate of 10 L/min or more to the surface of the titanium material while the titanium material is being heated to 800° C. to 1000° C. in an inert gas atmosphere.
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公开(公告)号：US20190021140A1
公开(公告)日：2019-01-17
申请号：US16132600
申请日：2018-09-17
Applicant: NETUREN CO., LTD.
Inventor： Tetsuya ONO , Masato SUGIMOTO , Yutaka KIYOSAWA , Toshihiro AIBA , Kazutomi OKA , Kunihiro KOBAYASHI , Fumiaki IKUTA , Kazuhiro KAWASAKI
Abstract: An induction heating system includes induction heating apparatuses, each including a high-frequency current transformer, a low-frequency current transformer and a heating coil, a high-frequency input switch connected to the high-frequency current transformer, a low-frequency input switch connected to the low-frequency current transformer, a first power source to output a high-frequency electric power and a low frequency electric power, a second power source, a first power source output switch connectable to the first power source, a second power source output switch connectable to the second power source, and a switch controller. Each induction heating apparatus includes a heater controller to send a signal to the switching controller to turn on one of the first power source output switch and the second power source output switch, to turn off the other, and to switch on or off each of the high-frequency input switch and the low-frequency input switch.
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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.
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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。
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