Method for welding two stainless steel sheets of thickness (e) 0.10 to 6.0 mm and having a particular composition having: a first welding step lasting a time (t) in ms: 0.10 to 0.50 mm, t=(40×e+36)±10%; 0.51 to 1.50 mm: t=(124×e 13)±10%; 1.51 to 6.0 mm: t=(12×e+47)±10%; with clamping force (F) in daN: 0.10 to 1.50 mm: F=(250×e+90)±10%; 1.51 mm to 6.0 mm: F=(180×e+150)±10%; appling a current between the welding electrodes, of intensity between 80 and 100% the maximum permissible intensity corresponding to expulsion of molten metal; a second step with an intensity between zero and 1 kA; and a third step with an intensity of 3.5 kA to 4.5 kA, for a time of at least 755 ms.

A laser cutting system for cutting articles, such as tubes, and method of using the same. The laser cutting system can cut slots, holes, and/or pores into each article or tube to form filtration tubes, for example. The system includes a delivery system for delivering a laser beam from a laser source, at least one mirror, a focusing objective lens, a gas source, and a delivery nozzle. A first stage holds each article in a longitudinal direction, and may rotate the article axially during delivery of the gas and laser beam towards the article and move the article longitudinally relative to the delivery nozzle. A second stage is provided in the system for moving the delivery nozzle relative to the article being held by the first stage. A controller controls actuation of the laser beam and the gas source, and movement of the first stage and the second stage.

A weld structure includes a first stainless steel member and a second stainless steel member. A crevice made by welding is defined by welding an end of the first stainless steel member and a portion other than an end of the second stainless steel member. A portion close to the end of the first stainless steel member is formed as a weld metal portion by performing welding heat input on the portion close to the end of the first stainless steel member. In the crevice made by welding, a length L.sub.B from a boundary between the weld metal portion and a raw material portion to a crevice deepest portion and a crevice length L.sub.C from the crevice deepest portion to a 40 μm-width position satisfy L.sub.C<L.sub.B.

Drill collars may be constructed using solid-state welding processes. Solid-state welding produces robust drill collars with high fatigue lifespans and permits individual segments of the drill collar to be optimized based on their intended use. A drill collar may be formed of a first segment with a different material, density, modulus of elasticity and/or geometry than an adjacent second segment fused thereto. If a segment of a drill collar is damaged in use, the damaged segment may be removed and replaced, possibly without de-rating the drill collar. Methods of forming the solid-state welds may include friction welding adjacent segments to one another such that features in each segment are circumferentially aligned when the weld is formed. Supplemental energy sources may provide additional heat at the welded surfaces to ensure the segments are effectively fused.

Provided is an austenitic stainless steel weld joint that is excellent in polythionic acid SCC resistance and naphthenic acid corrosion resistance, and is also excellent in creep ductility. An austenitic stainless steel weld joint includes a base material and a weld metal. The weld metal has a chemical composition at its width-center position and at its thickness-center position consisting of, in mass %, C: 0.050% or less, Si: 0.01 to 1.00%, Mn: 0.01 to 3.00%, P: 0.030% or less, S: 0.015% or less, Cr: 15.0 to 25.0%, Ni: 20.0 to 70.0%, Mo: 1.30 to 10.00%, Nb: 0.05 to 3.00%, N: 0.150% or less, and B: 0.0050% or less, with the balance: Fe and impurities.

A filter, a manufacturing method for a filter, and an air conditioner are provided. The filter includes a casing (10), a transition tube (20), and a filter screen assembly (30). The filter screen assembly (30) is provided in the casing (10), fitted with and connected to an inner wall of the casing (10), the casing (10) is an integrally formed piece, and two axial ends of the casing (10) have neck sections (11), and two neck sections (11) are both fixedly connected to the transition tube (20).

A process for producing a protective coating on a brake side of a brake disk main element includes using a laser powder build-up welding process. An NbC metal matrix powder or a Cr.sub.3C.sub.2 metal matrix powder is produced by agglomeration and sintering of NbC particles or Cr.sub.3C.sub.2 particles with particles of a metallic matrix composed of a stainless steel. During the laser powder build-up welding process, the NbC metal matrix powder or the Cr.sub.3C.sub.2 metal matrix powder and an aluminum alloy powder is supplied simultaneously to a molten surface region of the brake disk main element which has been melted by a laser.

A fill tool system that fills, seals, and inspects a heat pipe array, which includes one or more heat pipes with heat pipe working fluid.

The present invention discloses a method for welding Fe—Al intermetallic compound microporous material and a welded part made thereby, and the present invention relates to the field of welding technology. For the problem in the prior art that there is great difficulty in welding between Fe—Al microporous material and dense stainless steel, the method for welding Fe—Al intermetallic compound microporous material, in accordance with the present invention, comprises the following steps: turning on “welding torch fuel-gas” of a fusion-welding machine, and turning on welding shielding gas in a shield; adjusting welding parameters of the welding machine and parameter of the welding shielding gas in the shield for a fusion welding process; switching on the welding machine, and using welding wire as welding filler for welding Fe—Al intermetallic compound microporous material to dense stainless steel; and, cooling after completion of the welding.

A cap tip assembly for spot welding is disclosed. The cap tip assembly for spot welding is configured to spot-weld a first base material in which a flange is formed and a second base material overlapping the flange in a vertical direction. The cap tip assembly for spot welding includes a tip body provided in a shape of a rectangular block in which a round-shaped welding section is formed on a front side of a top surface, and a collet member coupled to the tip body to guide a conductive tape to the welding section.