Properties of TiN Coating Prepared on 3Cr2W8V by Electron Beam Surface Alloying Process

2011 ◽  
Vol 230-232 ◽  
pp. 698-703 ◽  
Author(s):  
Yuan Fang Chen ◽  
Xiao Dong Peng ◽  
Kang Chen ◽  
Jian Jun Hu ◽  
Hong Bin Xu ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Electron Beam ◽  
Friction Coefficient ◽  
Corrosion Potential ◽  
Corrosion Current ◽  
Surface Alloying ◽  
Tin Coating ◽  
Wear And Corrosion ◽  
Beam Surface ◽  
Wear And Corrosion Resistance

TiN coating was deposited on 3Cr2W8V alloy by PVD and then processed with electron beam surface alloying process. The microstructure, microhardness, friction coefficient, amount of wear and corrosion resistance of electron beam treated specimens were investigated. It is shown that the electron beam treated specimens can improve the properties of material. The coating has an average microhardness of approximately HV800, the friction coefficient of electron beam irradiation treated specimens is considerably lower than that of TiN coating. When the electron beam irradiate times is appropriate, the roughness of surface will much lower, and it will achieve polishing effects. The corrosion behavior of the composite coating in 3.5% Nacl solution at room temperature was also determined using a potentiont state system. In comparion with the corrosion potential for 3Cr2W8V alloy, the corrosion potentials of TiN coating and electron beam treated specimen are increased respectively. The electron beam treated specimen has the lowest corrosion current density as well as the highest corrosion potential showing an improved corrosion resistance compared with 3Cr2W8V alloy.

Study on the Properties of CrN Coating Prepared on 3Cr2W8V by Electron Beam Surface Alloying Process

2013 ◽  
Vol 319 ◽  
pp. 73-78
Author(s):  
Yuan Fang Chen ◽  
Hong Bin Xu ◽  
Jian Jun Hu ◽  
Liu Chun
Keyword(s):  
Electron Beam ◽  
Friction Coefficient ◽  
Room Temperature ◽  
Electron Beam Irradiation ◽  
Corrosion Current ◽  
Coating Film ◽  
Surface Alloying ◽  
Crn Coating ◽  
The Matrix ◽  
Beam Surface

CrN coating was deposited on 3Cr2W8V alloy by PVD and then processed with electron beam surface alloying process. The pulsed times of HCPEB was changed from 1 to 25 to prepare different specimens. Microstructures were investigated by optical metallurgical microscopy (OM), results show that the particles located in surface layer were obviously refined and the thickness of coating film has important influence to surface alloying . When the coating film is very thick, the heat-affect areas which are made by electron beam do not influence the matrix a lot. Microhardness, friction coefficient, amount of wear of electron beam treated specimens were determined. It is shown that the coating has an average microhardness of approximately HV630, the friction coefficient of electron beam irradiation treated specimens is considerably lower than that of CrN coating. When the electron beam irradiate times is appropriate, the roughness of surface will much lower, and it will achieve polishing effects. The corrosion behavior of the composite coating in 3.5% NaCl solution at room temperature was also determined using a potentiont state system. By comparing the electron beam treated specimen of 3Cr2W8V alloy to that of the primary 3Cr2W8V dendrites, the corrosion potentials of CrN coating and electron beam treated specimen are increased respectively. The electron beam treated specimen has the lowest corrosion current density as well as the highest corrosion potential showing an improved corrosion resistance compared with 3Cr2W8V alloy.

scholarly journals Characterization of Wear and Corrosion Resistance of Stellite 6 Laser Surfaced Alloyed (LSA) with Rhenium

Coatings ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 292
Author(s):  
Irina Smolina ◽  
Karol Kobiela
Keyword(s):  
Corrosion Resistance ◽  
Process Parameters ◽  
Corrosion Potential ◽  
Laser Surface ◽  
Stellite 6 ◽  
Wear And Corrosion ◽  
Study Results ◽  
Wear And Corrosion Resistance ◽  
Better Than

This paper presents the method of preparation and study results of the Stellite 6 laser surface alloyed (LSA) with rhenium using na LDF diode laser (4000 W). During this process, a rhenium powder was introduced onto the surface of the Co-based alloy. The possibility of improving wear and corrosion resistance properties is interesting and worth investigating. The selected process parameters: the laser power of 900 W, powder feed rate in the range 1.92–3.83 g/min, and necessarily preheating of the substrate up to 200 °C—allowing to obtain the LSA layers on the Stellite 6 substrate. Depending on the process parameters, it is possible to modify the substrate’s surface layer in terms of rhenium concentration and geometrical characteristics of the laser tracks. It was found that undissolved particles of rhenium in laser-alloyed layers have a non-significant effect on their hardness and abrasion resistance. The laser surface-alloyed corrosion potential is better than the corrosion potential of the Stellite 6 substrate, including reducing resistance to pitting corrosion with a high ability to repassivation.

TRIBOLOGICAL AND CORROSION BEHAVIOR OF SiC/TaXC BILAYER COATINGS PREPARED ON STAINLESS STEEL SURFACE BY DOUBLE GLOW PLASMA SURFACE ALLOYING TECHNIQUE

2020 ◽  
Vol 27 (10) ◽  
pp. 1950229
Author(s):  
SHENGWANG YU ◽  
YUEYUE WANG ◽  
JIE GAO ◽  
HONGJUN HEI ◽  
RONG WANG ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Reaction Temperature ◽  
Stainless Steel Surface ◽  
Surface Alloying ◽  
Wear And Corrosion ◽  
Glow Plasma ◽  
Wear And Corrosion Resistance ◽  
Plasma Surface Alloying Technique ◽  
Plasma Surface Alloying

In this work, SiC/TaxC bilayer coatings were prepared on stainless steel surface by double glow plasma surface alloying technique to improve the wear and corrosion resistance of the substrate. The effect of reaction temperature during the growth of SiC on the microstructure and property of the coating was investigated. The results showed that the surface topography of the coating could be regulated by the reaction temperature during the growth of SiC. Interactional flower-shaped rings, reticulate patterns, nanoparticles and microparticles were observed on the samples prepared at 750∘C, 800∘C, 850∘C and 900∘C, respectively. Tribological performance tests showed that the friction coefficient and specific wear rate of all the coated specimens were significantly decreased than the uncoated ones, indicating that the wear resistance of stainless steel was improved by the SiC/TaxC coating. The construction of the bilayer coating enhanced the corrosion resistance of stainless steel in terms of electrochemical tests. With an increase of the reaction temperature, the wear and corrosion resistance increased at first and then gradually decreased. SiC/TaxC coating prepared at 800∘C exhibited the best overall performance.

Effect of Pulsed High Energy Ion Beam on Surface Modification of AZ91 Magnesium Alloy

2005 ◽  
Vol 488-489 ◽  
pp. 701-704
Author(s):  
Hui Zhao ◽  
Zhong Han ◽  
Zhen Liu
Keyword(s):  
Corrosion Resistance ◽  
Surface Modification ◽  
Magnesium Alloy ◽  
Ion Beam ◽  
High Energy ◽  
Az91 Magnesium Alloy ◽  
Wear And Corrosion ◽  
Az91 Magnesium ◽  
Beam Surface ◽  
Wear And Corrosion Resistance

This study is concerned with the effect of high energy ion beam irradiation on surface properties of AZ91 magnesium alloy. The study included a characterization of ion beam surface modification zone in terms of microstructure, and mechanical properties like nanohardness, wear, and corrosion resistance of the surface layer were studied in details. Nanohardness of the modification layer was improved about 2 times as that of the as-received AZ91. The corrosion resistance of the modified layer was significantly improved in NaCl solution because of refined grains. The wear resistance of the modification layer was also improved as compared to as-received AZ91.

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