Etablissement Supervis

Karl Leithner

Molded articles, particularly cams for camshafts of internal combustion engines, are subjected to high wear conditions. In order to make them resistant to wear, they are produced from a sintered alloy, which has been fabricated by powder metallurgical means. The alloy has a hardened matrix with interstitial copper and consists of 0.5 to 16% by weight of molybdenum, 1 to 20% by weight of copper, 0.1 to 1.5% by weight of carbon and, optionally, of admixtures of chromium, manganese, silicon and nickel totalling, at most, 5% by weight, the remainder being iron.

Method for producing a cam

A highly wear-resistant sintered alloy is to be provided, with which, using conventional sintering technology and no additional hardening treatment, commodity parts are to be produced, which, in respect to their wear property are to be equivalent to chilled cast iron parts. They should have a surface roughness of approximately 50 Rockwell and only a slight shrinkage. This is accomplished with an iron-nickel-copper-molybdenum sintered alloy with addition of phosphorus, which contains a proportion of carbon, which exceeds the phosphorus added by at least a factor of 2. Essentially, the alloy has the following composition:

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Rankweil, Austria

Karl Leithner