Method of infiltrating a tubular component.

摘要

A valve guide (10) and a method for the manufacture thereof are described. The valve guide is a tubular article having a length to outer diameter ratio greater than about 1.5 and is made of a ferrous material by a PM route. The pressed guide is infiltrated by preparing a sheet (14) of the infiltrant alloy, rolling the sheet into a cylinder and inserting it into the guide bore (12) followed preferably by, simultaneous sintering and infiltration.