Abstract
The study aims at investigating the effect of auxiliary preparative and closing implantations in hardened tool steels on surface tribology modification. Samples of a martensitic tool steel, SKD11, are triply implanted with ions of N or Ar at higher energies, N at the normal energy, and N, BF and CO 2 at lower energies. The ion implantations result in dramatic increases of hardness and wear resistance to the samples in comparison with single N-ion implantation and double ion implantation. Analysis of ion depth profiles and surface compositions and microstructures is performed to reveal the mechanisms. It can be concluded that the improvement of the mechanical properties can be attributed to the deepening in the ion penetration and the forming of compound covers at the near surface region.
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