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Abstract: On the basis of Yu’s empirical electron theory of solids
and molecules, the valence electron structures of Fe2B phase and
Cr-containing Fe2B phase (known as boride layers) are researched. At the
same time, the effect on decreasing the eigen-brittleness of the boride
layer, by pack RE-chrome-boronizing, on its friction and wear behavior
is studied using an MM—200 wear tester. Compared with that of Fe2B
phase, the valence electron structure of Cr-containing Fe2B phase has
been changed, which results in the improvement of the eigen-brittleness
of the boride layer and the enhancement of the weak bond B—B in the Fe2B
phase. The drop of eigen-brittleness of boride layer can increase its
load bearing capacity, wear resistance and friction-reducing. The
friction and wear mechanism of the boride layers is too analyzed.
Key words: Boride layer RE-chrome-boronizing Eigen-brittleness
Valence electron structure Friction and wear
CLC No: TG156.8
山东省自然科学基金(Y98F11092)资助项目. Received 20010618, received in revised form
20020528
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