The present application relates to a gas control system and method for a reflow soldering furnace, comprising: an oxygen detecting device, capable of coming into contact with a gas in a furnace chamber, for detecting an oxygen concentration in the furnace chamber; an intake valve device, for controllably establishing fluid communication between a working gas source and the furnace chamber, thereby inputting the working gas into the furnace chamber; and a controller, for controlling the opening extent of at least one intake valve device based on an oxygen concentration signal, thereby regulating a flow rate of the working gas inputted into the furnace chamber. With a gas control system and method according to the present application, an oxygen concentration in a furnace chamber is detected in real time, and a gas control valve is automatically regulated on the basis of a predetermined set value or target value to control input of a working gas, achieving precise control and fast regulation; in addition, when work is stopped or during work intermissions, a gas control valve can be closed in a timely manner, thereby preventing waste and reducing costs.

A solid wire according to an aspect of the present invention contains, as a chemical composition: C: 0.003% to 0.080%; Si: 0.0010% to 0.50%; Mn: 0.050% to 1.80%; Al: 0.030% to 0.500%; Ni: 8.0% to 16.0%; P: 0.0200% or less; S: 0.0100% or less; O: 0.050% or less; Ta: 0% to 0.1000%; Cu: 0% to 0.5%; Cr: 0% to 0.5%; Mo: 0% to 0.5%; V: 0% to 0.20%; Ti: 0% to 0.10%; Nb: 0% to 0.10%; B: 0% to 0.010%; Mg: 0% to 0.80%; REM: 0% to 0.050%; and a remainder: Fe and impurities, a is 1.35% to 5.50%, and Ceq is 0.250% to 0.520%.

A portable jobsite skid system, including a skid-mounted enclosure made of formed sheet and structural metal, comprising a roof, side panels, and two doors, a first microbulk vessel containing a first pressurized gas, and a second microbulk vessel containing a second pressurized gas, a gas mixer configured to mix the first pressurized gas and the second pressurized gas, and quick disconnect ports configured to connect a gas mixture to the end user. The system may include between two and four doors. The system may include at least one self-contained welding machine, and a means for providing the pressurized gas to the self-contained welding machine.

A turbomachine diaphragm including a sealing section having a first end portion that extends to a second end portion through an intermediate portion; and at least one rail member including a first end section that extends from the first end portion of the sealing section to a second end section through an intermediate section having an inner surface section and an outer surface section, the second end section including multiple weld passes disposed on opposed sides of the second end section for mitigation of thermal tensions on the diaphragm, the multiple weld passes forming a cladding welded to the diaphragm, wherein the cladding includes a stainless austenitic steel.

Properties and performance of weld material between metals in a weldment is controlled by modifying one or more of the nitrogen content and the carbon content to produce carbide (e.g. MC-type), nitride and/or complex carbide/nitride (e.g. MX-type) type precipitates. Fusion welding includes (i) adjusting shield gas composition to increase nitrogen/carbon gas and nitride/carbide species, (ii) adjusting composition of nitrogen/carbon in materials that participate in molten welding processes, (iii) direct addition of nitrides/carbides (e.g. powder form), controlled addition of nitride/carbide forming elements (e.g. Ti, Al), or addition of elements that increase/impede solubility of nitrogen/carbon or nitride/carbide promoting elements (e.g. Mn), and (iv) other processes, such as use of fluxes and additive materials. Weld materials have improved resistance to different cracking mechanisms (e.g., hot cracking mechanisms and solid state cracking mechanisms) and improved tensile related mechanical properties.

A container for distilled spirits includes a stainless steel body, stainless steel top element and stainless steel bottom element wherein the body, top element and body element are joined together without solder such that the flavor of the distilled spirits therein is preserved. A method of making the container is also disclosed.

A pre-coated steel substrate coated with: —optionally, an anticorrosion coating and —a flux including at least one titanate and at least one nanoparticle chosen from: TiO2, SiO2, Yttria-stabilized zirconia (YSZ), Al2O3, MoO3, CrO3, CeO2 or a mixture thereof, the thickness of the flux being between 30 and 95 μm.

A solid-bowl centrifuge screw with a screw flight is provided. The screw flight has at least a first welding layer on a base body of the solid-bowl centrifuge and at least a second welding layer on the first welding layer. Thus, plural welding layers are disposed successively on one another and are applied by shaping build-up welding.

A ceramic-copper composite having a flat plate shape, including: a ceramic layer; a copper layer; and a brazing material layer present between the ceramic layer and the copper layer, in which a specified Expression (1) is satisfied in a cut surface of the copper layer obtained when the ceramic-copper composite is cut at a plane perpendicular to a main surface of the ceramic-copper composite, where S(102)% is an area ratio occupied by copper crystals having a crystal orientation of which an inclination from a crystal orientation of (102) plane is within 10°, S(101)% is an area ratio occupied by copper crystals having a crystal orientation of which an inclination from a crystal orientation of (101) plane is within 10°, S(111)% is an area ratio occupied by copper crystals having a crystal orientation of which an inclination from a crystal orientation of (111) plane is within 10°, and S(112)% is an area ratio occupied by copper crystals having a crystal orientation of which an inclination from a crystal orientation of (112) plane is within 10°.

The present invention relates to a flux-cored wire for positive polarity gas-shielded arc welding use, in which a flux contains a metal powder and also contains BaF.sub.2 and SrF.sub.2 and AlF.sub.3 and/or CaF.sub.2 as fluorides wherein the content of BaF.sub.2 is 1.0 to 4.5%, the content of SrF.sub.2 is 2.0% or less, the content of CaF.sub.2 is 0.45% or less and the content of AlF.sub.3 is 0.70% or less, at least one of metal elements constituting the flux and the fluorides is a strong deoxidizing metal element having a specified standard formation Gibbs energy, and the content of each of an oxide and a carbonate in the flux is 0.5% or less.