Abstract
The authors tried to develop a new ferrous alloy with high volume fraction of carbides under the concept that such alloys should reduce metallic adhesion between contacting parts, resulting in improved scuffing wear resistance. The alloy obtained using a co-reduced powder had volume fraction of carbides of about 72%, relative density of over 99%, hardness of about 69Rc and transverse-rupture strength of about lOOOMPa. According to a block-on-ring test, the alloy showed superior adhesion resistance to conventional one. In a firing engine test, the alloy presented improved wear resistance of both rocker arms and mating cams with no signs of scuffing wear.
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