Research on Effect of Ion Nitriding Temperature on Wear Resistance of 40Cr Steel

2011 ◽  
Vol 291-294 ◽  
pp. 101-104
Author(s):  
Guo Xing Pang ◽  
Zhong Lei Li ◽  
Zhi Yong Chen ◽  
Yan Jie Wang
Keyword(s):  
Wear Resistance ◽  
Surface Hardness ◽  
Nitriding Process ◽  
Micro Hardness ◽  
Nitriding Temperature ◽  
Ion Nitriding ◽  
Metallographic Observation ◽  
40Cr Steel

The main purpose of this paper is to research on the different ion nitriding temperatures of 40Cr effect on the surface hardness, wear resistance of the workpiece. With series of experiment and test of micro-hardness, ring-block wear, metallographic observation, to select the optimization temperature for the ion nitriding process of 40Cr steel.

Research on Ion Nitriding Temperature Effect on Wear Resistance of 35CrMo Steel

2011 ◽  
Vol 341-342 ◽  
pp. 128-132 ◽  
Author(s):  
Guo Xing Pang ◽  
Zhi Yong Chen ◽  
Zhong Lei Li ◽  
Yan Jie Wang
Keyword(s):  
Wear Resistance ◽  
Temperature Effect ◽  
Surface Hardness ◽  
Nitriding Process ◽  
Micro Hardness ◽  
Nitriding Temperature ◽  
Ion Nitriding ◽  
35Crmo Steel ◽  
Metallographic Observation

The main purpose of this paper is to research on the different ion nitriding temperatures of 35CrMo effect on the surface hardness, wear resistance of the workpiece. With series of experiment and test of micro-hardness, ring-block wear, metallographic observation, to select the optimization temperature for the ion nitriding process of 35CrMo steel.

A combined Tem/Apfim study of precipitation in ion-nitrided ultra-low carbon bainitic steel

1987 ◽  
Vol 45 ◽  
pp. 224-225
Author(s):  
M.G. Burke ◽  
E.J. Palmiere ◽  
A.J. DeArdo
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Surface Properties ◽  
Fatigue Behavior ◽  
Cost Effective ◽  
Nitriding Process ◽  
Bainitic Steel ◽  
Low Carbon ◽  
Ion Nitriding ◽  
Nitride Precipitation

Ion-nitriding represents an attractive and cost-effective process for improving the surface properties (hardness, wear resistance) and fatigue behavior of ultra-low carbon bainitic (ULCB) steels (1). Although the improvements in mechanical properties of nitrided steels are well-documented, precipitation in these steels during the nitriding process has not been studied extensively. The precipitation in ULCB steels is complex due to the presence of Mo, Mn, and Ni. Therefore, to investigate nitride precipitation in these steels, we have employed both TEM and APFIM in order to characterize the ultra-fine precipitates.The material employed in this study was a fully bainitic ULCB steel (0.021C- lMn- 1.4Ni- 1.5Mo- 0.016Ti- 0.05 2Nb -0.001B). Ion-nitriding was performed at 466°C for 14 hours using a mixture of 75% H2 - 25% N2 at a pressure of 2500 millitorr.

Using the Vacuum Ion Nitriding Process to Improve the Quality of 38CrMoAIA Cylinder

2015 ◽  
Vol 1089 ◽  
pp. 93-96
Author(s):  
Liang Zhi Zhang ◽  
Han Zhang ◽  
Lin Yao Ding
Keyword(s):  
Mass Production ◽  
Surface Hardness ◽  
Cylinder Liner ◽  
Nitriding Process ◽  
Good Effect ◽  
Ion Nitriding ◽  
Size Change ◽  
Gas Nitriding ◽  
Hardness Gradient

In order to replace traditional gas nitriding with vacuum ion nitriding process, the 38CrMoAIA cylinder is used for the experimental research. Based on the 10 groups of cylinder specimen analysis of experimental results, surface hardness, hardness gradient, brittleness levels, nitriding depth and size change all meet the requirements of the technology of the cylinder liner. Aiming at the important link in the experiment, some problems needing attention in the process of nitride are put forward. Vacuum ion nitriding due to mature technology, good effect of nitride can be applied to mass production.

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.

Treatment of Surface Properties of Titanium with Plasma (Ion) Nitriding

2009 ◽  
Vol 283-286 ◽  
pp. 401-405 ◽  
Author(s):  
H. Yilmazer ◽  
S. Yilmaz ◽  
M.E. Acma
Keyword(s):  
Wear Resistance ◽  
Titanium Alloys ◽  
Surface Properties ◽  
Surface Hardness ◽  
Hardened Layer ◽  
Ion Nitriding ◽  
Nitriding Time ◽  
X Ray ◽  
Nitrided Surface ◽  
Nitrided Titanium

In order to improve the poor surface hardness and the wear resistance, titanium has been nitrided with plasma (ion) nitriding which is one of the methods to treat surface properties of titanium alloys. The increment at surface hardness and so the wear resistance of nitrided titanium alloys has been provided by means of compound layer (ε-Ti2N+δ-TiN) and diffusion zone (α-Ti) occurred by plasma ion nitriding. The goal of the present paper is to investigate effects of nitriding temperature and nitriding time on the microstructure and hardness value of nitrided surface layers. A systematic study was undertaken with specimens of commercial pure Ti and Ti-6Al-4V alloy. As treatment parameters, we have used; nitriding time (from 2 to 9 hour), nitriding atmosphere (H2-80%N2), total pressure (1 kPa) and cathode temperature (from 600 to 800 oC). The Vickers indenter was used for analysis of the micro hardness measurements. The thin hardened layer at the nitrided surface was characterized by glancing-angle X-ray difractometer. X-ray diffraction analysis has confirmed the formation of ε-Ti2N and δ-TiN phases on the nitrided specimens. Experimental details and characterization of plasma (ion) nitrided titanium have reported and discussed.

Wear Resistance of Ion Implanting Tungsten Carbide on 65Mn Steel Used as Harrow Disk

2014 ◽  
Vol 1030-1032 ◽  
pp. 259-262 ◽  
Author(s):  
Hai Yang ◽  
Ren Bao Jiao ◽  
Shu Yang Wang
Keyword(s):  
Wear Resistance ◽  
Phase Composition ◽  
Tungsten Carbide ◽  
Sandy Soil ◽  
Surface Hardness ◽  
Working Life ◽  
Optical Microscope ◽  
Micro Hardness ◽  
Hardness Tester ◽  
Carbide Layer

To improve the harrow disk made of 65Mn steel working life, an ion implanting metal in order to obtain tungsten carbide treatment was proposed in this work. Microstructure and phase composition of 65Mn steel obtained by ion implanting tungsten carbide process were analyzed by optical microscope and XRD, respectively. The surface hardness was tested by microscopic hardness tester, and the wear resistant performance of the wear layer was tested by abrader abrasor. The results showed that the micro-hardness of ion implanting tungsten carbide layer can be reached 1100 HV0.2, higher than that of 65Mn steel, the thickness of tungsten carbide layer was 400μm, which greatly improve the wear resistance. Harrow disk after the ion implanting tungsten carbide exhibited the excellent wear resistance in the sandy soil, and its working life was more than twice the length of the genera treatment harrow disk.

Characteristics of Laser Cladded Nickel-Based Chromic Carbide Composite Coatings

2017 ◽  
Vol 893 ◽  
pp. 340-344
Author(s):  
Sheng Dai ◽  
Dun Wen Zuo ◽  
Xian Rui Zhao ◽  
Jin Fang Wang
Keyword(s):  
Wear Resistance ◽  
Carbon Steel ◽  
Composite Coating ◽  
Steel Substrate ◽  
Composite Coatings ◽  
Surface Hardness ◽  
Micro Hardness ◽  
Wear Properties ◽  
Hardness Tester ◽  
Metallurgical Bonding

To improve the surface hardness and wear resistance of metal parts. Ni-based chromic carbidecomposite coating was prepared on the carbon steel (0.45 mass% C) substrates by laser cladding. Microstructure and wear properties of composite coatings were investigated by SEM, EDS, XRD, Vickers micro-hardness tester and wear machine. The results show that good metallurgical bonding between the Ni-based chromic carbidecomposite coating and carbon steel substrate. Micro-hardness of Ni-based Cr3C2 composite coating along the layer depth presents an evident stepladder distribution. The average micro-hardness of the laser clad coating is about 950 HV. The result of wear experiment shows that Ni-based Cr3C2 composite coating processes good wear resistance.

Surface Layers Produced by Modified Floe Ferritic Nitrocarburising

2015 ◽  
Vol 812 ◽  
pp. 253-258
Author(s):  
Andrea Szilagyine Biro ◽  
Endre Szabo ◽  
Miklos Tisza
Keyword(s):  
Wear Resistance ◽  
White Layer ◽  
Nitrided Layer ◽  
High Surface ◽  
Surface Hardness ◽  
Structural Steels ◽  
Surface Alloying ◽  
Tool Steels ◽  
Micro Hardness ◽  
Surface Layers

Ferritic nitrocarburising is a surface alloying heat treatment, which can provide to components high surface hardness, thus improved wear resistance. In structural steels the porosity of white layer has a key role in wear resistance: the porosity is undesirable. For tool steels the absence of white layer is undesirable. Floe process is one way to decrease the porosity of white layer. During our experiments we applied a modified Floe process on two different steels. The acontol of this process is simpler than conventional process. We measured the micro-hardness as a function of depth from the surface, and we made microscopic examination to analyse the structure of nitrided layer.

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.

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