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Properties of Nitrogen deep implanted industrial steels

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Abstract

Two types of steels, SKD11 and NAK55, with and without chromium were implanted with 30 keV nitrogen ions to a dose 2 × 1017 cm2 using the new deep implantation process after the preliminary surface treatment by a quasi-neutral intense nitrogen ion flux with the energy 300 eV up to the 1019 cm2. The thickness of the hardened layer significantly increased up to ~ 20 μm by 5 minutes irradiation with 300 eV nitrogen ions at temperatures between 250 and 300°C. The wear resistance of martensitic stee! SKD11 was drastically improved by a factor of 20 after pre-plasma irradiation. Deep implantation also reduces the wear of NAK55 by an order of magnitude, associated with an increase in hardness by a factor of 2.4 at an applied load of 50 gf due to the formation of Fe2.4N and CrN.

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Han, J.G., Choi, B.H., Kim, W. et al. Properties of Nitrogen deep implanted industrial steels. Metals and Materials 2, 179–182 (1996). https://doi.org/10.1007/BF03026092

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