Some radical new approaches to producing pressed and sintered components such as valve seat inserts for heavy duty engines have led to products capable of displacing the traditional cast materials. Details of patented products based on a full density modified M42 composition are described, including variants incorporating solid lubricant for valve compatibility. These products have been proven in long term durability testing. A totally new innovative concept for sintering other high speed steel compositions to full density is revealed for the first time, and some product properties discussed. Automotive components, especially valve seat inserts, can be readily and cost effectively manufactured from full density high speed tool steel based materials. Heat treatment can be altered to suit the application. In many cases a simple post sinter tempering treatment is sufficient to produce a material with an excellent compromise between the strength, wear resistance and machinability. These products can incorporate machinability aids and solid lubricant phases. An innovative high speed tool steel liquid sintering route has been developed. This can yield cost effective high density products, properties of which show potential for a wide range of applications.
New processes and products for high speed steel valve seat inserts at near full density
Neue Verfahren und Erzeugnisse für Schnellstahl-Ventilsitzringe bei nahezu voller Dichte
2000
7 Seiten, 4 Bilder, 3 Tabellen, 5 Quellen
Aufsatz (Konferenz)
Englisch
New Processes and Products for High Speed Steel Valve Seat Inserts at Near Full Density
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