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.

A joining outer diameter portion located at an axial-direction intermediate portion and fitting tapered outer diameter portions located on both axial-direction sides across the joining outer diameter portion are formed on an outer peripheral face portion of an inner metal member. A joining inner diameter portion corresponding to the joining outer diameter portion and having a smaller diameter than the joining outer diameter portion so as to overlap with the joining outer diameter portion, and fitting tapered inner diameter portions corresponding to the fitting tapered outer diameter portions are formed on an inner peripheral face portion of an outer metal member. The joining portions are joined by means of resistance heating generated by conducting electricity while they are pressurized in the axial direction. The fitting tapered portions are brought into a fitted state in association with the joining.

The disclosure relates to a friction brake body for a friction brake of a motor vehicle, in particular a brake disc, wherein the friction brake body comprises a base body made from gray cast iron, and at least one wear resistant layer formed at least in areas on the base body. The wear resistant layer is a laser alloyed or laser dispersed edge layer of the base body and comprises at least one additive.

A method of making an enhanced cast iron workpiece having increased oil retention is provided. The method comprises providing a laser tool arranged to emit a laser to perform carbon burn-off from a cast iron workpiece. The cast iron workpiece comprises cast iron and having a first surface with carbon microstructures thereon. The method further comprises selectively laser burning-off carbon microstructures from the first surface of the workpiece to form a pattern on the first surface. The pattern has separate pockets by the laser burn-off of carbon microstructures on the first surface. Each separate pocket is separate from and free of fluid communication with any other pocket relative to the first surface to provide enhanced lubricant retention in each pocket on the first surface. The method further comprises heating the workpiece to between about 200° C. and about 400° C. to temper the first surface and cooling the workpiece to ambient temperature.

A method of refurbishing worn diaphragm rails for turbo machines. This method comprises machining the worn part of the diaphragm rails such that a clean and geometrically exact machined surface is achieved. Welding one or more layers on these machined surfaces builds up a cladding that overtops the nominal dimensions of new diaphragm. The method further comprises machining the cladding such that it has the nominal dimensions of a new diaphragm.

A weldment includes a first component, a second component, and a weld joint coupling the first and second components together. The weld joint forms a heat affected zone in the first component and creates residual tensile stress in the first component. The first and second components cooperate to define a pocket configured to position a highest magnitude of the residual tensile stress in the first component in a location that is outside of the heat affected zone of the first component.

A clamping platen for a die casting machine has a base plate body of a cast iron material, a surface layer of a stainless steel material welded onto at least one plate side of the base plate body, and a transitional layer between the base plate body and the surface layer. The surface layer is applied as a laser weld application layer.

A joining connection with a weld seam running between a first metal component and a second metal component and produced by a beam welding method. The weld seam has a weld seam main section extending along a joining gap formed between the metal components, the weld seam has a weld seam starting section leading from the direction of the joining gap into the first or second component. The first or second component has a recess in the region of the weld seam starting section that is lowered in relation to the upper edges of the two components forming the joining gap, and/or the weld seam has a weld seam end section leading from the direction of the joining gap into the first or second component.

To provide a cast product having an alumina barrier layer and method for producing the same. A cast product having an alumina barrier layer of the present invention is a cast product in which an alumina barrier layer containing Al.sub.2O.sub.3 is formed on the surface of a cast body, and the cast body contains C: 0.3 mass % to 0.7 mass %, Si: 0.1 mass % to 1.5 mass %, Mn: 0.1 mass % to 3 mass %, Cr: 15 mass % to 40 mass %, Ni: 20 mass % to 55 mass %, Al: 2 mass % to 4 mass %, rare earth element: 0.005 mass % to 0.4 mass %, W: 0.5 mass % to 5 mass % and/or Mo: 0.1 mass % to 3 mass %, and 25 mass % or more of Fe in the remainder and an inevitable impurity, and 80 mass % or more of the rare earth element is La.

A method for producing a surface of a base material, wherein the base material has spheroidal graphite cast iron, wherein firstly a partial surface is located, in a further step a two-ply buffer layer is used by means of TIG welding with the welding additive NiFe, wherein in a further step a fill layer is applied to the buffer layer, wherein the MIG welding method is used in conjunction with NiFe-2 in accordance with EN ISO 107 as welding additive material.