公开(公告)号：US20240424611A1

公开(公告)日：2024-12-26

申请号：US18697517

申请日：2022-09-07

Applicant: HITACHI, LTD.

Inventor： Makoto OGATA ,  Naoki MORIHIRA

IPC: B23K31/02 ,  B23K9/095 ,  B23K9/127 ,  B23K37/02

Abstract: The welding path autonomous optimization system includes a quality—welding-condition correlation database in which a constraint condition of welding by a welding robot that operates a welding torch is stored, an interference analysis part configured to determine a welding path that does not interfere with an object to be welded based on three-dimensional CAD data of the object to be welded and the constraint condition stored in the quality—welding-condition correlation database, and a welding-robot-operation/welding-condition output part configured to output welding process information based on the welding path.

公开(公告)号：US20190100825A1

公开(公告)日：2019-04-04

申请号：US16086331

申请日：2017-01-19

Applicant: HITACHI, LTD.

Inventor： Tomonori KIMURA ,  Yasuhisa AONO ,  Makoto OGATA ,  Naoya TOKOO ,  Yasuo KONDO ,  Masafumi NOUJIMA

IPC: C22C27/06 ,  C22C30/04 ,  C22C30/02

Abstract: There is provided a Cr-based two-phase alloy including two phases of a ferrite phase and an austenite phase that are mixed with each other. A chemical composition of the Cr-based two-phase alloy consists of a main component, an auxiliary component, impurities, a first optional auxiliary component, and a second optional auxiliary component. The main component consists of 33-61 mass % Cr, 18-40 mass % Ni and 10-33 mass % Fe, and a total content of the Ni and the Fe is 37-65 mass %. The auxiliary component consists of 0.1-2 mass % Mn, 0.1-1 mass % Si, 0.005-0.05 mass % Al, and 0.02-0.3 mass % Sn. The impurities include 0.04 mass % or less of P, 0.01 mass % or less of S, 0.03 mass % or less of C, 0.04 mass % or less of N, and 0.05 mass % or less of O.

公开(公告)号：US20190071754A1

公开(公告)日：2019-03-07

申请号：US16084299

申请日：2017-01-30

Applicant: HITACHI, LTD.

Inventor： Tomonori KIMURA ,  Masafumi NOUJIMA ,  Yasuhisa AONO ,  Makoto OGATA ,  Naoya TOKOO

IPC: C22C27/06 ,  C22C30/02

Abstract: An object of the invention is to provide a two-phase alloy which contains inexpensive Cr as a main component, and which is superior in strength properties including corrosion resistance and toughness, and in abrasion resistance to conventional ones under a high corrosion circumstance such as in an oil well. The invention is a Cr based two-phase alloy including two phases of a ferrite phase and an austenite phase in a mixed state, in which a chemical composition of the Cr based two-phase alloy consists of a major component, an accessory component, impurities, a first optional accessory component, and a second optional accessory component, and the major component consists of 33% by mass or more and 65% by mass or less of Cr, 18% by mass or more and 40% by mass or less of Ni, and 10% by mass or more and 33% by mass or less of Fe.

公开(公告)号：US20240100615A1

公开(公告)日：2024-03-28

申请号：US18265092

申请日：2021-10-27

Applicant: Hitachi, Ltd.

Inventor： Naoki MORIHIRA ,  Kazutoshi SUGIE ,  Makoto OGATA ,  Seunghwan PARK

IPC: B23K9/095 ,  B23K9/12

CPC classification number: B23K9/0956 ,  B23K9/126

Abstract: A welding system includes: a setting apparatus configured to move a material to be welded to a desired welding position according to a disturbance condition of the material to be welded 1; a welding robot configured to weld, according to a working condition, the material to be welded moved by the setting apparatus; an inspection apparatus configured to inspect a welding quality of the material to be welded that is welded at a current time; a storage apparatus configured to store the working condition for the current time, the disturbance condition for the current time, and the welding quality of the current time in association with one another; and a determination unit configured to change, when the welding quality of the current time stored in the storage apparatus satisfies a predetermined required quality, the corresponding disturbance condition for the current time and set the changed disturbance condition as a disturbance condition for a next time.

公开(公告)号：US20170292175A1

公开(公告)日：2017-10-12

申请号：US15510322

申请日：2015-09-28

Applicant: HITACHI, LTD.

Inventor： Masafumi NOUJIMA ,  Yasuhisa AONO ,  Naoya OKIZAKI ,  Yusaku MARUNO ,  Tomonori KIMURA ,  Makoto OGATA

IPC: C22C30/00 ,  C22F1/11 ,  C22F1/00 ,  C22C27/06

Abstract: An object of the invention is to provide: a two-phase alloy as a metal material that can be preferably utilized under circumstances of a temperature range and a high corrosion as in an oil well, the two-phase alloy having a high corrosion resistance and good mechanical properties that are equivalent or more than those of conventional ones, and saving a cost; a product of the two-phase alloy; and a method for producing the product. There is provided a two-phase alloy containing Cr as a major component and including two phases of an austenite phase and a ferrite phase in a mixed state. The alloy has a chemical composition containing: 34-70 mass % of Cr; 17-45 mass % of Ni; 10-35 mass % of Fe; 0.1-2 mass % of Mn; 0.1-1 mass % of Si; and impurities. The total content of the Ni and the Fe is 30-65 mass %.