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Steel 45 (AISI 1045) is studied after a sandblasting treatment and plasma nitriding. The corrosion resistance of the steel is determined by measuring the electrochemical polarization and electrochemical impedance. The optimum time of sandblasting yielding the thickest and densest nitride layer is determined.
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...
Plasma nitriding was conducted at low gas pressure and low temperature of 400 °C for 304 austenitic stainless steel. The combined performance of the treated specimens was evaluated by scanning electronic microscopy (SEM), X-ray diffractometer (XRD), microhardness tester, ball-on-disc tribometer and electrochemical polarization. The results showed that an expanded austenite (γN), also called S phase...
A two-step plasma treatment (TSPT) combining plasma nitrocarburizing (PNC) and plasma nitriding (PN) was developed for AISI 1045 steel, and also compared with PNC-only and PN-only treatment. The microstructure and related properties were investigated by means of scanning electron microscopy (SEM), X-ray diffraction (XRD), Vickers hardness tester and pin-on-disk tribotester. The results showed that...
In this study, low temperature plasma nitriding (LPN) was primarily used in 38CrMoAl hydraulic plunger to overcome the peeling problem of the compound layer in real application. The cross-sectional microstructures of the treated samples were observed by optical metallography, phase constituents were determined by X-ray diffraction (XRD), the microhardness profile and brittleness of surface were measured...
In this study, sand blasting was conducted as a pretreatment prior to plasma nitriding, and the effect of sand blasting on plasma nitriding was evaluated by means of scanning electron microscopy (SEM), optical microscopy, X-ray diffraction (XRD), electrochemical polarization and pin-on-disk tribotester etc. The results showed that sand blasting could enhance the nitriding efficiency and bring about...
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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