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Laser shock peening was primarily adopted as a pretreatment prior to plasma nitriding for 42CrMo steel. It was found that laser shock peening had obvious enhancement effect on plasma nitriding. The thickness of compound layer and effective hardening layer could be effectively improved under the same plasma nitriding condition, which was about twice thicker as that of conventional plasma nitriding...
In this study, a novel duplex treatment (DT) combining plasma nitrocarburizing (PNC) and plasma nitriding (PN) was primarily developed for AISI 1045 steel. The modified samples were investigated by optical microscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), microhardness test, and pin-on-disk tribotest. The results showed that the nitriding efficiency was remarkably improved by...
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