PLASMA NITRIDING THESIS

High density RF-DC plasma nitriding of steels for die and mold technologies. The structural and mechanical properties especially the fatigue behaviour of the raw, quenched and plasma nitrided AISI steel were examined. RF-DC plasma process system. Figure 1 a illustrated the RF-DC plasma nitriding system. Experimental results and numerical modelling.

The inner surface of through-holes in these nozzles was sufficiently hardened, creating a hardness higher than that of the bare AISI by three to five times. Abstract In this review paper, an effort has been made to understand the plasma ion nitriding process and other existing nitriding processes used in industries. Laser Nitriding of Metals: Low temperature high density plasma nitriding of stainless steel molds for stamping of oxide glasses. Tribology Letters, 8 4 , Effects of various gas mixtures on plasma nitriding behavior of AISI steel. Electric Arc Furnace Conference Proceedings pp.

Surface and Coatings Technology,SS Various analyses were performed to describe the inner nitriding process only, from the inner surface of pipes and nozzles to their depth in thickness.

Practical Nitriding and Ferritic Nitrocarburizing.

Low Temperature Plasma Nitriding of Inner Surfaces in Stainless Steel Mini-/Micro-Pipes and Nozzles

Pipes and nozzles are typical mechanical parts for transporting gaseous and liquid media and depositing liquid- or melt-drops onto material surfaces and interfaces in joining, soldering, and drawing processes [ 1 ].

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Dependence of substrate composition. Surface and Coatings Technology, 6 Journal of Applied Physics, 75 poasma Low pressure plasma arc source ion nitriding compared with glow-discharge plasma nitriding of stainless steel. Mechanisms, technology and results.

Received Jan 9; Accepted May Materials Characterization, 61 plasmz For example, digital camera units are integrated into cellular phones by accurately joining a series of functional parts. Glow plasma behaviour in nitriding process. The structural and mechanical properties especially the fatigue behaviour of the raw, quenched and plasma nitrided AISI steel were examined.

plasma nitriding thesis

Mock-up testing has recently begun as part of a METI program to nitride 36 micro-nozzles by a single process. Lowtemperature plasma nitriding of sintered PIM L austenitic stainless steel. Materials Research, 17, In particular, the essential mechanical parts such as pipes and nozzles nitridimg strength and hardness sufficient for ejecting viscous liquids, solders, and particles. Characterization and wear behavior of plasma nitrided nickel based dental alloy.

A Review on Plasma Ion Nitriding (PIN) Process

Conditions for the formation of a martensitic single-phase compound layer in ion-nitrided L austenitic stainless steel. Bulletin of Materials Science, 34 1 The average hardness for this micro-nozzle was HV, much higher than that for the mini-nozzle.

plasma nitriding thesis

It was also determined that microstructure was largely converted into martensite and residual austenite phases after traditional hardening and tempering treatments, Pplasma was determined that chemical composition of the surface of plasma nitrided steel was changed and a white layer including iron nitrides and a diffusion layer including alloy nitrides are formed on the surface.

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Experimental results and numerical modelling. Title of the Thesis: Effect of frequency on the properties of plasma nitrided AISI steel. On the role of promoters in promoted iron catalysts used in the industrial synthesis of Ammonia. Modelling of diffusion—precipitation in nitrided alloyed iron. Plasma nitriding of AISI ball bearing steel and effect of heat treatment on nitrided layer. Important results of diagnostics and its applications to improve the mechanical and chemical corrosion properties of ferrous and non ferrous alloys have been discussed.

Low pressure plasma arc source ion nitriding compared with glow-discharge plasma nitriding of stainless steel. Current Science, 83 3 Effects of various gas mixtures on plasma nitriding behavior of AISI steel.

Effects of the process parameters on the layer formation behavior of plasma nitrided steels. The dipole electrodes worked to ignite the RF-plasma, which was attracted to the DC-biased plate.