Kobe Steel, Ltd.

Jfe Steel Corporation

Kabushiki Kaisha Kobe Seiko Sho

Keito Ishizaki

Tomoko Sugimura

Hidenori Nako

Mitsuhiro Okatsu

Fumimaru Kawabata

Shun Izutani

Yoshitomi Okazaki

Shigeki Nishiyama

Yoshihiko Kitagawa

Naoya Hayakawa

Takashi Yashima

Yimin Yuan

Makoto Ota

Shuichi Sakaguchi

Junichi Ono

Kaoru Nagatani

Naohide Furukawa

A flux-cored wire comprising a flux which is a core and a hoop which is an outer skin or sheath is described. The flux includes a strong deoxidizing metal element containing Mg and Al, and a fluoride powder. At least 60 mass % of a strong deoxidizing metal powder related to the strong deoxidizing metal element has a grain size of at most 150 μm. At least 60 mass % of the fluoride powder has a grain size of at most 75 μm. The flux is present at a concentration of 10-30 mass % relative to a total mass of the flux-cored wire. The flux-cored wire also requires a specific composition of elements.

Flux-cored wire and welding method

A sensor protecting case is provided with a case main body for housing a sensor main body and a sensor input portion, and a centralized cooling portion that is partitioned off by a partition so as to include at least part of the sensor input portion, and constitutes an independent space within the case main body. The case main body has a first gas inflow port for causing gas to flow into the case main body, and a first gas outflow port for causing the gas to flow out of the case main body. The partition has a second gas inflow port that is connected to the first gas inflow port to cause the gas to flow into the centralized cooling portion, and a second gas outflow port for causing the gas to flow out of the centralized cooling part into the case main body.

Sensor protecting case, imaging device, welding system, cooling method for sensor, and cooling control method for sensor

A solid wire for electroslag welding, including Fe and, by mass % based on a total mass of the wire: C: more than 0% and 0.03% or less; Si: more than 0% and 0.10% or less; Mn: more than 0% and 0.25% or less; Ni: 10.5%-14.0%; S: more than 0% and 0.010% or less; Al: more than 0% and 0.250% or less; REM: 0.002%-0.080%; and O: more than 0% and 0.0090% or less.

Solid wire for electroslag welding, and welding joint

Disclosed herein is an electroslag welding wire containing, by mass % based on total mass of the wire: C: more than 0% and 0.07% or less; Si: more than 0% and 0.50% or less; Mn: more than 0% and 1.0% or less; Ni: 6.0 to 15.0%; and Fe: 79% or more. The electroslag welding wire satisfies the following relationship (1): 0.150&#x2264;C+Si/30+Mn/20+Ni/60&#x2264;0.300 (1).

Wire for electroslag welding, flux for electroslag welding and welded joint

A high-strength steel pipe has a tensile strength of 800 MPa or more and includes a weld metal having high cold-cracking resistance and high low-temperature toughness, wherein the weld metal contains C: 0.04% to 0.09% by mass, Si: 0.32% to 0.50% by mass, Mn: 1.4% to 2.0% by mass, Cu: less than 0.5% by mass, Ni: more than 0.9% by mass but not more than 4.2% by mass, Mo: 0.4% to 1.5% by mass, Cr: less than 0.5% by mass, V: less than 0.2% by mass, and the remainder of Fe and incidental impurities, and CS values calculated from the weld metal components using the equation CS=5.1+1.4[Mo]&#x2212;[Ni]&#x2212;[Mn]&#x2212;36.3[C] are equal to zero or more at both an internal surface and an external surface.

High-strength welded steel pipe including weld metal having high cold-cracking resistance and method for manufacturing the same

Growing community of inventors

Kanagawa, Japan

Keito Ishizaki