Method for producing a moulded body from sintered steel
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United States of America Patent
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Issued Date -
Jul 27, 2006
app pub date -
Sep 30, 2003
filing date -
Oct 1, 2002
priority date (Note) -
Abandoned
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Abstract
The invention relates to a method for producing a molded body made of sintered steel, with a sintering powder on the basis of iron being mixed with a master alloy powder containing nickel, boron and iron, and with the powder mixture being pressed into a formed body before the formed body is sintered under the conditions of a liquid-phase sintering with a volume share of liquid phase up to 15%. In order to improve the impact strength, it is proposed that the boron content of the powder mixture is between 0.03% and 0.2% by weight at a boron share of the master alloy powder of less than 10% by weight, that the weight ratio between the nickel and the boron share of the powder mixture exceeds 5 and that the master alloy powder has an average particle size of between 10 and 90 .mu.m.
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