Enhancement of CP-titanum wear resistance using a two-step CO 2 laser-sustained plasma nitriding process

2017 ◽  
Vol 325 ◽  
pp. 229-238 ◽  
Author(s):  
Amar M. Kamat ◽  
Albert E. Segall ◽  
Stephen M. Copley ◽  
Judith A. Todd
Keyword(s):  
Wear Resistance ◽  
Plasma Nitriding ◽  
Nitriding Process

IMPROVEMENT OF WEAR RESISTANCE OF SHREDDER BLADES USED IN A REFUSE-DERIVED FUEL (RDF) FACILITY BY PLASMA NITRIDING

2019 ◽  
Vol 27 (04) ◽  
pp. 1950131
Author(s):  
HAKAN AYDIN ◽  
FURKAN BOSTANCI
Keyword(s):  
Wear Resistance ◽  
Working Conditions ◽  
Plasma Nitriding ◽  
Surface Hardness ◽  
Service Condition ◽  
Case Depth ◽  
Nitriding Process ◽  
Nitriding Time ◽  
Refuse Derived Fuel ◽  
Hardness Values

Refuse-derived fuel (RDF) is a kind of renewable energy source to produce energy for replacement of fossil fuels. Aggressive working conditions in RDF facilities cause the shredder blades to wear out quickly. So, the purpose of this paper was to study the effect of plasma-nitriding process on wear resistance of shredder blades made of AISI D2 tool steel in the service condition of RDF facility. Shredder blades were commercially available from two different suppliers (A and B suppliers). These hardened shredder blades were plasma-nitrided in the mixed nitrogen and hydrogen atmosphere at a volume ratio of 3:1 at 450∘C for 12, 18 and 24[Formula: see text]h at a total pressure of 250 Pa. Characterisation of plasma-nitrided layers on the shredder blades was carried out by means of microstructure and microhardness measurements. Wear tests of plasma-nitrided shredder blades were performed under actual working conditions in the RDF facility. Wear analysis of these shredder blades was conducted using three-dimensional (3D) optical measuring instrument GOM ATOS II. The compositional difference of the shredder blades provided by A and B suppliers played an important role on the nitrided layer. The case depth of A-blades significantly increased with increasing plasma-nitriding time. However, the case depth of B-blades was fairly lower at the same nitriding time and only slightly increased with increasing plasma-nitriding time. Plasma-nitriding process significantly improved the surface hardness of the shredder blades. Maximum surface hardness values were achieved at nitriding time of 18 h for both blades. In this case, this increase in surface hardness values was above 100%. At nitriding time of 24[Formula: see text]h, the maximum surface hardness of A-blades significantly decreased, whereas this decrease in surface hardness of B-blades was the negligible value. The wear test results showed that plasma-nitriding process significatly decreased the wear of shredder blades; 18 h nitriding for A-blades and 24[Formula: see text]h nitriding for B-blades had better wear-reducing ability in the service condition of RDF facility. In these cases, the decreases in the total volume wear loss for A- and B-blades were 53% and 60%, respectively.

Study on W-Mo-Y Multi-Elements Alloying and Plasma Nitriding on Q235 Steel

2011 ◽  
Vol 687 ◽  
pp. 745-749
Author(s):  
Yuan Gao ◽  
Bing Li ◽  
Xuan Nan Chen ◽  
Xue Feng Huang ◽  
Wei Zhang ◽  
...  
Keyword(s):  
Solid Solution ◽  
Wear Resistance ◽  
Process Parameters ◽  
Plasma Nitriding ◽  
Nitriding Process ◽  
Micro Hardness ◽  
Columnar Crystal ◽  
Q235 Steel ◽  
Wear Tests ◽  
Microhardness Tester

Using plasma alloying technique, Q235 steel was firstly treated by W-Mo-Y Multi-elements alloying followed by plasma nitriding process. The effects of process parameters on alloying layer were studied. The structure, composition, phase and micro-hardness of alloying layer were analyzed by metalloscope, XRD, SEM and microhardness tester. Results show that the microstructure of W-Mo-Y alloying layer is columnar crystal, and W, Mo contents decrease from the outside to the inside. The element Y is distributed mainly at the grain boundaries. The phase of alloying layer consisted of Fe, Fe3Mo, Fe17Y2 and the solid solution of (W, Mo, Y) in α-Fe. After plasma nitriding process, the co-diffusion layer is strengthened and large amounts of nitrides form and dispersedly distribute in the alloying layer. The phase of alloying layer consist of Fe4N, Fe3Mo, Fe, MoN, Mo2N, W2N, WN. The average micro-hardness of alloying layer is 850HV0.05. And then the wear tests were conducted. Compared with untreated samples, the wear resistance of alloying layer is improved by 2 times under abrasive wear conditions.

scholarly journals Plasma Nitriding Process of Cast Camshaft to Improve Wear Resistance

2019 ◽  
Vol 135 (4) ◽  
pp. 793-799 ◽  
Author(s):  
A. Dayanç ◽  
B. Karaca ◽  
L.C. Kumruoğlu
Keyword(s):  
Wear Resistance ◽  
Plasma Nitriding ◽  
Nitriding Process ◽  
Improve Wear Resistance

Material condition tailored to plasma nitriding process for ensuring corrosion and wear resistance of austenitic stainless steel

2013 ◽  
Vol 228 ◽  
pp. S615-S618 ◽  
Author(s):  
Katharina Köster ◽  
Peter Kaestner ◽  
Günter Bräuer ◽  
Holger Hoche ◽  
Torsten Troßmann ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Wear Resistance ◽  
Austenitic Stainless Steel ◽  
Plasma Nitriding ◽  
Corrosion And Wear ◽  
Nitriding Process ◽  
Material Condition

Performance characteristics of steel 1.2842 after nitridation

2021 ◽  
Vol 16 (1) ◽  
pp. 43-48
Author(s):  
Michal Krbaťa ◽  
◽  
Jana Escherová ◽  
Keyword(s):  
Mechanical Properties ◽  
Surface Roughness ◽  
Wear Resistance ◽  
Chemical Composition ◽  
Plasma Nitriding ◽  
Cutting Tools ◽  
Operating Costs ◽  
Mechanical And Tribological Properties ◽  
Structure Thickness ◽  
Pin On Disc

The paper deals with the change in mechanical properties and wear of 1.2842 universal tool steel after plasma nitriding, which is widely used to produce cutting tools with good durability and low operating costs. Plasma nitriding was performed at a temperature of 500 °C for 10-hour period in a standard N2 /H2 atmosphere with 1:3 gases ratio. Microstructure, phase structure, thickness of a nitriding layer and surface roughness of samples were measured with optical microscopes and a profilometer. Verification of a chemical composition was carried out on the BAS TASMAN Q4 device. Wear resistance was measured on a universal TRIBOLAB UTM 3 tribometer, through a, “pin on disc“ method. The results of experiments have shown that plasma nitriding process, significantly improves the mechanical and tribological properties of selected materials.

EFFECT OF NITROGEN AMOUNT ON TRIBOLOGICAL BEHAVIOR OF PLASMA NITRIDED 31CrMoV9 STEEL

2019 ◽  
Vol 26 (07) ◽  
pp. 1850217 ◽  
Author(s):  
O. ÇOMAKLI ◽  
A. F. YETIM ◽  
B. KARACA ◽  
A. ÇELIK
Keyword(s):  
Wear Resistance ◽  
Tribological Behavior ◽  
Wear Behavior ◽  
Plasma Nitriding ◽  
Surface Hardness ◽  
Compound Layer ◽  
Gas Mixture ◽  
X Ray Diffraction ◽  
X Ray ◽  
Pin On Disk

The 31CrMoV9 steels were plasma nitrided under different gas mixture ratios to investigate an influence of nitrogen amount on wear behavior. The structure, mechanical and tribological behavior of untreated and nitrided 31CrMoV9 steels were analyzed with X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), microhardness device, 3D profilometer and pin-on-disk wear tester. The analysis outcomes displayed that the compound layer consists of nitride phases (Fe2N, Fe3N, Fe4N and CrN). Additionally, the thickness of the compound layers, surface hardness and roughness increased with increasing nitrogen amount in the gas mixture. The highest friction coefficient value was obtained at nitrogen amount of 50%, but the lowest value was seen at nitrogen amount of 6%. It was observed that wear resistance of 31CrMoV9 steel improved after plasma nitriding, and the best wear resistance was also obtained from plasma nitrided sample at the gas mixture of 94% H[Formula: see text]% N2.

Modeling of the Plasma Nitriding Process

1990 ◽  
pp. 155-158
Author(s):  
J. L. Marchand ◽  
H. Michel ◽  
D. Ablitzer ◽  
M. Gantois ◽  
A. Ricard ◽  
...  
Keyword(s):  
Plasma Nitriding ◽  
Nitriding Process

scholarly journals X-Ray Phase Analysis Of Nitrided Layers Of X2CrNiMo17-12-2 Austenitic Steel

2015 ◽  
Vol 60 (3) ◽  
pp. 2005-2012 ◽  
Author(s):  
T. Frączek ◽  
M. Olejnik ◽  
M. Pilarska
Keyword(s):  
Austenitic Steel ◽  
Phase Analysis ◽  
Plasma Nitriding ◽  
Subsurface Layer ◽  
Nitrogen Plasma ◽  
Nitriding Process ◽  
X Ray ◽  
Temperature Range ◽  
Chromium Nitrides

Abstract This work presents the results of diffraction analyses carried out using X-ray phase analyses (XRD and GIXRD) of nitrided layers of X2CrNiMo17-12-2 austenitic steel. Plasma nitriding process was c arried out in the temperature range of 325 ÷ 400 °C and time of 2 ÷ 4 h. Hydrogen-nitrogen plasma was used as reactive atmosphere (H2 75% + N2 25%) with pressure of 150 Pa. On the basis of the X-ray analyses it was stated that the obtained nitrided layers consisted of a subsurface layer of chromium nitrides and a zone of nitrogen saturated austenite.

Adhesive Wear of Duplex-Treated Tool and Structural Steels

2008 ◽  
Author(s):  
Jan Sucha´nek ◽  
Peter Jurcˇi
Keyword(s):  
Wear Resistance ◽  
High Speed ◽  
Plasma Nitriding ◽  
Processing Parameters ◽  
Ceramic Coatings ◽  
Pulse Plasma ◽  
High Wear Resistance ◽  
Pvd Coatings ◽  
Pvd Coating ◽  
Subsurface Layers

Thin ceramic coatings deposited on the surface of tools and machine parts by PVD methods improve considerably their tribological properties. However these hard brittle coatings can be damaged rapidly if plastic deformation initiates in the substrate near the coating-substrate interface when subject to a relatively high load. The logical way how to treat such problems is improvement of the mechanical characteristics of subsurface layers by heat treatment or thermo-chemical treatment such as plasma nitriding. The typical duplex process involves plasma nitriding and PVD coating treatment of steels. Thickness of the nitride layers depends on the activity of nitrogen in the plasma, process temperature and time. The type and thickness of nitrides can influence considerably the quality of the deposited PVD coatings and their adhesion to a nitrided substrate. High-speed steels and Cr-V ledeburitic steels were plasma nitrided and duplex-coated (pulse plasma nitriding + PVD TiN or CrN coating) at various combinations of processing parameters. The wear resistance of the non-nitrided, PVD coated and duplex-coated steel surface was examined by ring-on-plate and plate-on-plate tribological testers. The effect of subsequent PVD–coating performed on plasma nitrided specimens can be considered as very positive when the specimens were severe loaded. The tested duplex treated low-alloy steel 31CrMoV9 was pulse plasma nitrided and then coated by different PVD coatings (TiN, CrN, TiAlN and (CrN-TiN)x3). The results of tribological tests (ring-on-plate tribometer) confirmed the high wear resistance of duplex treated steels.

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