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.

Bearing bushings which are exposed to highly elevated temperatures during operation, corresponding high-temperature-resistant bearing bushings and exhaust-gas turbochargers having at least one such bearing bushing, include an iron material having a material composition which, apart from iron, has at least carbon, silicon, manganese, nickel, chromium, molybdenum and tungsten alloy constituents in certain amounts. This material composition ensures sufficient temperature resistance and self-lubricating properties with simultaneously good machining properties and a moderate price.

There is provided an exhaust casing for a turbocharger that can be reduced in weight and can be easily machined. The exhaust casing (1) for the turbocharger includes an exhaust casing body (2) for the turbocharger that has a hollow structure and is made of a casting of iron-based metal, a light metal layer (3) that serves as an outer shell, and a heat insulating layer (4) that is provided between the exhaust casing body (2) and the light metal layer (3).

A method for manufacturing a planet gear or a sun gear of a gearbox of a wind turbine includes forming a base of the planet gear via at least one of casting or forging. The base of the planet gear includes an inner circumferential surface and an outer circumferential surface. Therefore, at least one of the inner circumferential surface or the outer circumferential surface of the planet gear includes a plurality of net or near-net gear teeth. The method also includes applying a coating material to at least a portion of the base of the gear and at least a portion of the plurality of gear teeth of the gear via an additive manufacturing process so as to increase a hardness of the portions of the base and the plurality of gear teeth that includes the coating material.

An exhaust gas turbine is provided. The exhaust gas turbine includes a first turbine housing part having insulating material extending along an interior surface and a second turbine housing part having insulating material extending along an interior surface, the second turbine housing part coupled to the first turbine housing part to form a volute directing exhaust gas to a turbine wheel.

A turbocharger, having a turbine and a compressor. The turbine comprises a turbine housing and a turbine rotor with turbine blades. Radially outer edges of the rotor blades and a portion of the turbine housing or a stator-side component connected to the turbine housing define a turbine-side gap. The compressor comprises a compressor housing and a compressor rotor with compressor blades. Radially outer edges of the compressor blades and a portion of the compressor housing facing the compressor blades or a stator-side component connected to the compressor housing define a compressor-side gap. The portion of the turbine housing facing the turbine rotor blades or the stator-side component connected to the turbine housing and/or the portion of the compressor housing facing the compressor rotor blades or the stator-side component connected to the compressor housing comprises a running-in structure comprising hollow spaces.

There is provided an exhaust casing for a turbocharger that can be reduced in weight and can be easily machined. The exhaust casing (1) for the turbocharger includes an exhaust casing body (2) for the turbocharger that has a hollow structure and is made of a casting of iron-based metal, a light metal layer (3) that serves as an outer shell, and a heat insulating layer (4) that is provided between the exhaust casing body (2) and the light metal layer (3).

A method of producing a composite metal article and/or a composite metal wear component. The method including the following steps: casting a component composed of a host metal composition wherein one or more cavities are formed in the component during casting; inserting a wear resistant composition in solid form into the one or more cavities formed in the component composed of the host metal composition; and, bonding the wear resistant composition into the one or more cavities of the component composed of the host metal composition to form the composite metal article.

A hub for a wind turbine which includes a hub body having a first blade bearing flange, a second blade bearing flange and a main bearing flange, and a stiffening structure stiffening a first portion of the hub body, wherein the first portion is arranged adjacent to the main bearing flange and between the first blade bearing flange and the second blade bearing flange. This hub has the advantage that a stiffness (or a rigidity) of the hub body can be increased close to the main bearing flange.

Embodiments of the present invention relate to an inner casing component configured to form part of a steam flow path of a last stage of an axial flow steam turbine, the steam turbine inner casing component having a base made of nodular cast iron and a coating, on the base, in a region exposed to the steam flow path, consisting of manganese austenitic steel.