Robert Boschgmbh

Robert Zeller

Friedrich J Esper

High strength ductile sintered iron alloy composition containing silicon and phosphorus with a total alloy content below 4% having a yield point above 400 N/mm.sup.2 and an impact strength of more than 40 J/cm.sup.2. The alloys contain between about 0.5 and 3% by weight silicon, and between about 0.2 and 0.7% phosphorus, with the balance being iron. These alloy compositions are made by sintering iron, iron-silicon and iron-phosphorus powders at temperatures between about 1050.degree. and 1200.degree. C.

High strength sintered alloy

To provide an alloy having high strength, toughness, and which is highly resistant to impact loading, the alloy has the following composition (all percentages by weight): 2-4.5 Mo, more than 2.5 to less than 3.5% Ni, more than 0.3 to less than 0.6% P, the rest iron; preferably, 3% Mo, 3% Ni, 0.45% P and the rest iron are used.

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Stuttgart, Germany

Robert Zeller