The invention relates to a hybrid electroslag cladding method, comprising: providing a workpiece (6) to be cladded; guiding a strip electrode (4) onto the surface of the workpiece (6); cladding the strip electrode (4) onto the surface of the workpiece (6) using electroslag cladding; guiding a metal cored hybrid electroslag cladding wire (7) into the weld puddle (9) of the strip electrode (4) for controlling the chemical composition of the cladding. The invention further relates to hybrid electroslag cladding systems and wires.

Forming respective packets (20, 21, 46, 50, 52, 70, 82, 84) of filler metal powder (24) and flux powder (26) for adjacent placement on a working surface (30) for laser deposition of the metal. Each packet may be formed of a sacrificial sleeve (22) or adjacently seamed sheets (72A-D), which may include flux fibers such as alumina, zirconia, basalt, or silica. A packet (56) of flux may be disposed centrally inside a packet (56) of metal or vice versa. A connected stack (70, 82, 84) of three packets (74A-C, 86A-C) may be formed by seaming (76A-B) four stacked sheets (72A-D) around common edges and filling the three resulting spaces between the sheets with a respective vertical sequence of metal/flux/metal or flux/metal/flux powders. Quilting and intermediate stitching may provide for precise control of material distribution and facilitate feeding of material.

This welded metal contains C, Si, Mn, Ni, Cr, Mo, Ti, B, O, N and Nb+V in specific amounts, respectively, with the balance being made up of Fe and unavoidable impurities. In this welded metal, carbides having circle-equivalent diameters of less than 0.40 m have an average circle-equivalent diameter of 0.10 m or more, and intergranular carbides having circle-equivalent diameters of 0.40 m or more have an average circle-equivalent diameter of 0.75 m or less.

Systems and methods for low-manganese welding alloys are disclosed. An example arc welding consumable that forms a weld deposit on a steel workpiece during an arc welding operation, wherein the welding consumable comprises: less than 0.4 wt % manganese; strengthening agents selected from the group consisting of nickel, cobalt, copper, carbon, molybdenum, chromium, vanadium, silicon, and boron; and grain control agents selected from the group consisting of niobium, tantalum, titanium, zirconium, and boron, wherein the grain control agents comprise greater than 0.06 wt % and less than 0.6 wt % of the welding consumable, wherein the weld deposit comprises a tensile strength greater than or equal to 70 ksi, a yield strength greater than or equal to 58 ksi, a ductility, as measured by percent elongation, that is at least 22%, and a Charpy V-notch toughness greater than or equal to 20 ft-lbs at ?20? F., and wherein the welding consumable provides a manganese fume generation rate less than 0.01 grams per minute during the arc welding operation.

A precipitation strengthened nickel based welding material that comprises 5-15 wt. % Co, 5-25 wt. % Cr, 1-6 wt. % Al, 0.05-0.2 wt. % C, 0.015-0.4 wt. % B, 1-3 wt. % Si, chemical elements selected from among tungsten and molybdenum from about 1 to 20 wt. %, chemical elements selected from among titanium, zirconium, hafnium, tantalum and rhenium from about 1 to 18 wt. % and nickel with impurities to balance, wherein the boron content is inversely proportional to silicon content and decreases from about 0.3 wt. % to about 0.015 wt. % when silicon content increases from about 1 wt. % to about 3 wt. % produces sound high strength and high oxidation resistance crack free welds on precipitation strengthened superalloys and single crystal materials.

A method of manufacturing a shroud segment, including separately molding at least first and second parts by powder injection molding. The first part has an inner surface and at least one fluid passage in communication with the inner surface. The second part has an outer surface complementary to the inner surface of the first part. At least one of the inner and outer surfaces is formed to define a plurality of grooves. A plurality of cooling passages in fluid communication with the at least one fluid passage are defined with the plurality of grooves by interconnecting the inner and outer surfaces while the first and second parts remain in a green state. The interconnected parts are debound and sintered to fuse the parts to define at least a portion of the shroud segment including the cooling passages.

The present invention relates to a rotary kiln made of a metal alloy. The alloy is preferably chosen from the group of Alloy 321, Alloy 321H, Alloy 347, Alloy 347H, Alloy 348 and Alloy 348H. An object of the present invention is to provide a rotary kiln that can be operated under the reducing gas conditions to be experienced by the kiln in a pyrolysis process of scrap rubber. The present invention furthermore relates to the use of such a rotary kiln in a process for the pyrolysis of tyres.

The present invention is a weld metal formed by gas shielded arc welding using a flux cored wire, the welded metal having a predetermined chemical composition, residual austenite particles being present in an amount of at least 2500 particles/mm.sup.2, and the volume fraction of residual austenite particles being at least 4.0%.

A new pre-alloyed metal based powder, intended to be used in surface coating of metal parts. The powder is deposited using e.g. laser cladding or plasma transfer arc welding (PTA), or thermal spray (e.g. HVOF). The powder is useful for reducing friction and improving wear reducing properties of the deposited coating. Such coatings may also improve machinability. As friction or wear reducing component, inclusions of manganese sulphide or tungsten sulphide in the pre-alloyed powder may be used.

The invention relates generally to welding and, more specifically, to electrodes for arc welding, such as Gas Metal Arc Welding (GMAW) or Flux Core Arc Welding (FCAW). In one embodiment, a tubular welding wire includes a sheath and a core. The core includes a carbon source and a potassium source that together comprise less than 10% of the core by weight. Furthermore, the carbon source is selected from the group: carbon black, lamp black, carbon nanotubes, and diamond.