METHOD FOR PRODUCING A VALVE SEAT RING

摘要

A valve seat ring and a method for producing the same may include a first material and a second material. The first material may be composed of approximately 15 to 30% by weight of Mo, approximately 5 to 30% by weight of chromium, approximately 0 to 5% by weight of Si, approximately 0 to 2% by weight of C, and up to 5% by weight of other elements and a portion of Co. The second material may be composed of approximately 10 to 12% by weight of Cr, approximately 0.5 to 0.8% by weight of Mn, approximately 0.5 to 1% by weight of Si, approximately 0.5 to 0.9% by weight of C, up to approximately 3% by weight of other elements and a reminder of Fe.

主权项

1. A method for producing a valve seat ring, comprising: providing a first material composed of approximately 15 to 30% by weight of molybdenum, approximately 5 to 30% by weight of chromium, approximately 0 to 5% by weight of silicon, approximately 0 to 2% by weight of carbon, and up to 5% by weight of other elements and a proportion of cobalt, and a second material composed of approximately 10 to 12% by weight of chromium, approximately 0.5 to 0.8% manganese, approximately 0.5 to 1% by weight of silicon, approximately 0.5 to 0.9% by weight of carbon, up to approximately 3% by weight of other elements and a remainder of iron,
processing the first materials and the second material to form a powder by atomising a metal melt so that the first material and the second material have a mean particle size of approximately 5 to 13 μm, processing the powder of each of the first material and the second materials into a flowable granulate with a granulate size of substantially smaller than 300 μm and greater than 15 μm, admixing a proportion of 1 to 5% by weight of an organic pressing additive, filling the granulates of the first material and of the second material into a press tool one after the other and subsequently uniaxially pressing the granulate in the press tool with a pressing pressure of 400