Abstract:
A part includes a three-dimensional porous metallic workpiece printed via an additive manufacturing process and subsequently subjected to a diffusion-based process to convert at least a portion of the porous metallic workpiece to a ceramic workpiece or an intermetallic workpiece.
Abstract:
The invention relates to a method for hot forming a part, wherein the hot forming is performed starting with a metal coated steel blank, which is heated to a temperature between the Ac3-temperatur of the steel and 1000° C in a furnace, after which the heated blank is transported to a hot forming press, and the heated blank is pressed in the hot forming press to form a part. According to the invention, the steel has the following composition in weight%: C: 0.10 - 0.25, Mn: 1.6 - 2.6, Si:
Abstract:
Bei einem Verfahren zur Warmblechumformung erfolgt die Erwärmung eines Blechs in einem ersten Schritt durch induktive Erwärmung mittels einer ersten Induktionserwärmungsvorrichtung auf eine Temperatur kleiner oder gleich der Curie-Temperatur, und in einem zweiten Schritt erfolgt die Erwärmung auf Temperaturen größer 800 °C mittels konventioneller Erwärmung in einem Ofen oder mittels induktiver Erwärmung in einer zweiten, von der ersten verschiedenen Induktionserwärmungsvorrichtung.
Abstract:
An inlet valve is partially coated with a protective coating to resist corrosion and gas impingement when used in an internal combustion engine. The inlet valve has a hard cladding that is shaped to function as a valve seat. The hard cladding forms an interface with the valve head body, which is typically made of a softer metallic mierial than the hard cladding. The protective coating is bonded to the inlet valve and covers the cladding-body interface. The protective coating is resistant to corrosion, wear from gas impingement, and can withstand the high temperatures reached in internal combustion engines. A method for making the inlet valves generally includes masking a portion of the valve stem and the valve seat, applying a protective coating to cladding-body interface, and curing the protective coating or otherwise bonding the protective coating to the inlet valve.
Abstract:
Disclosed is a method for producing an abradable coating for a part of a turbo-machine. Said method comprises the following steps: a) a powdery material is pretreated; b) a processable preliminary product is produced which is to be applied to a part that is to be coated; c) the preliminary product is applied to the part that is to be coated; d) a synthetic binder contained in the preliminary product is burned off; e) the part is sintered; f) the part is finished. Said improved method for producing an abradable coating for a turbo-machine eliminates the drawbacks of the solutions known from prior art. In particular, said method is inexpensive, can be easily combined with other production process steps, e.g. thermal treatments that have to be carried out anyway, and is also suitable as a method for repairs.
Abstract:
An inlet valve is partially coated with a protective coating to resist corrosion and gas impingement when used in an internal combustion engine. The inlet valve has a hard cladding that is shaped to function as a valve seat. The hard cladding forms an interface with the valve head body, which is typically made of a softer metallic material than the hard cladding. The protective coating is bonded to the inlet valve and covers the cladding-body interface. The protective coating is resistant to corrosion, wear from gas impingement, and can withstand the high temperatures reached in internal combustion engines. A method for making the inlet valves generally includes masking a portion of the valve stem and the valve seat, applying a protective coating to cladding-body interface, and curing the protective coating or otherwise bonding the protective coating to the inlet valve. An apparatus for coating the valves includes a movable track, a plurality of attachment apparatus for holding a plurality of valves on the track, a spraying device for applying the coating, and an infrared lamp for curing the coating.
Abstract:
A corrosion resistant iron-based substrate such as a valve disc, having a zinc/aluminum diffusion layer and a polymeric coating applied thereon, and articles-of- manufacturing containing same, are provided herein, as well as processes of preparing same. The substrates and articles-of-manufacturing are characterized as capable of withstanding intense flow of salt water and high hydraulic pressure.