| 摘要 |
<p>Process in which steel powders are prepared, are compressed into a blank, this blank is infiltrated with copper, thus obtaining an article (1), characterised in that the powders are chosen and the sintered blank is infiltrated so as to obtain either of the following two compositions (in mass %) in the case of the said article: either C 0.6 to 1.2, Ni 0 to 5, Mo 0.3 to 2, Cr 0 to 4, V 0 to 0.6, Ni + Mo + Cr + V + metallic impurities 0.1 to 5, infiltrated Cu 4 to 15, remainder essentially Fe, or C 0.6 to 1.5, Mo 0 to 10, Cr 2 to 5, W 0 to 15, V 0.2 to 6, Co 0 to 10, Mo + Cr + W + V + Co + metallic impurities 5 to 50, infiltrated Cu 7 to 20, remainder essentially Fe, the said article thus having a steel skeleton not broken by the infiltration of copper and having a good resistance to fatigue-wear and producing little or no wear on an antagonist article in repeated impacts or friction. Another subject of the invention is the use of the process for the manufacture of a distribution article (1) of a heat engine, and the articles obtained. <IMAGE></p> |
