scholarly journals Surface Modification and Wear Resistance of Electroless Ni-P Based Duplex Alloy Coating

2019 ◽  
Vol 1378 ◽  
pp. 042043
Author(s):  
O.R. Oloyede ◽  
A.S Afolalu ◽  
O.J. Adelakun ◽  
O.R. Adetunji ◽  
A.O. Adeodu ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Surface Modification ◽  
Alloy Coating ◽  
Duplex Alloy ◽  
Electroless Ni

The Compound Tribological Properties of Nano-Ceramic Lubricating Additives and Ni-W-P Alloy Coating

2010 ◽  
Vol 29-32 ◽  
pp. 624-629
Author(s):  
Min Chen ◽  
W.S. Cheng ◽  
Zu Xin Zhao ◽  
X.B. Huang
Keyword(s):  
Wear Resistance ◽  
Surface Modification ◽  
Friction Surface ◽  
High Hardness ◽  
Alloy Coating ◽  
Metal Substrate ◽  
High Wear Resistance ◽  
Lubricating Film ◽  
Material Wear

The major solving ways for the material wear are surface modification and lubrication. However, the application of only one solution can not achieve desirable effect. Ni–W–P alloy coating has high hardness and high wear resistance, and is an effect way of surface modification on the 45 steel. In the friction process, the nano ceramic lubricating additives deposited on the friction surface of Ni-W-P alloy coating so as to form a protective lubricating film, therefore realizing in-situ repair on the friction surface during operation. The nano ceramic particles achieve the antiwear and friction reducing effects by the micro polishing effect, the filling and repairing effects, ball bearing effect, multiphase microcrystal effect. Experiment results confirm that Ni-W-P alloy coating and nano ceramic lubricating additive have excellent synergistic effect, and form double protection for the metal substrate, e.g., the wear resistance of Ni-W-P alloy coating (with heat treatment and the oil with nano ceramic additives) has increased hundreds times than 45 steel as the metal substrate with basic oil, zero wear is achieved，which break through the bottleneck of previous separate research of the above-mentioned the two.

Laser Assisted High Entropy Alloy Coating on Low Carbon Steel

2019 ◽  
Vol 813 ◽  
pp. 159-164
Author(s):  
Carlos Alberto Souto ◽  
Gustavo Faria Melo da Silva ◽  
Laura Angelica Ardila Rodriguez ◽  
Aline C. de Oliveira ◽  
Kátia Regina Cardoso
Keyword(s):  
Wear Resistance ◽  
Carbon Steel ◽  
Low Carbon Steel ◽  
High Hardness ◽  
Alloy Coating ◽  
High Entropy Alloy ◽  
Nominal Composition ◽  
Low Carbon ◽  
High Entropy ◽  
Scan Speed

Coatings with high entropy alloys of the AlCoCrFeNiV system were obtained by selective laser melting on low carbon steel substrates. The effect of the variation of the Fe and V contents as well as the laser processing parameters in the development of the coating were evaluated. The coatings were obtained from the simple powder mixtures of the high purity elemental components in a planetary ball mill. The coatings were obtained by using CO2 laser with a power of 100 W, diameter of 0.16 mm, and scan speed varying from 3 to 12 mm/s. Phase constituents, microstructure and hardness were investigated by XRD, SEM, and microhardness tester, respectively. Wear resistance measurements were carried out by the micro-abrasion method using ball-cratering tests. The coatings presented good adhesion to the substrate and high hardness, of the order of 480 to 650 HV. Most homogeneous coating with nominal composition was obtained by using the higher scan speed, 12 mm/s. Vanadium addition increased hardness and gave rise to a high entropy alloy coating composed by BCC solid solutions. Ball cratering tests conducted on HEA layer showing improvement of material wear resistance, when compared to base substrate, decreasing up to 88% its wear rate, from 1.91x10-6 mm3/Nmm to 0.23x10-6 mm3/Nmm.

Improving surface finish and wear resistance of additive manufactured nickel-titanium by ultrasonic nano-crystal surface modification

2017 ◽  
Vol 249 ◽  
pp. 433-440 ◽  
Author(s):  
Chi Ma ◽  
Mohsen Taheri Andani ◽  
Haifeng Qin ◽  
Narges Shayesteh Moghaddam ◽  
Hamdy Ibrahim ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Surface Modification ◽  
Surface Finish ◽  
Crystal Surface ◽  
Nickel Titanium ◽  
Nano Crystal

The Study of Electroless Ni-P and Ni-P-PTFE Coating on Steel Tire Mold

2012 ◽  
Vol 501 ◽  
pp. 316-320
Author(s):  
Jian Zhang Guo ◽  
Bin Xu
Keyword(s):  
Wear Resistance ◽  
Corrosion Resistance ◽  
Pore Structure ◽  
Energy Dispersive Spectrometer ◽  
Salt Spray ◽  
Amorphous Structure ◽  
Carbon Steels ◽  
Electrochemical System ◽  
Electroless Ni ◽  
Scanning Electron

In order to improve the surface property of the steel tire mold, carbon steels were processed by electroless Ni-P and Ni-P-PTFE under contrast experiment. The coatings were characterized by Scanning Electron Microscopy (SEM) and Energy Dispersive Spectrometer (EDS). The wear resistance and corrosion resistance of the coatings were explored by tribometer, salt spray cabinet and advanced electrochemical system. The experimental results showed that the Ni-P coating was amorphous structure, and the Ni-P-PTFE coating was micro-pore structure; The wear resistance of Ni-P-PTFE coating was superior to Ni-P coating; In view of the micro-pore structure, the corrosion resistance of Ni-P-PTFE coating was worse than Ni-P coating, but they were all superior to carbon steels, and the service life of the steel tire mold were improved.

A study on the wear resistance of electroless Ni–P/Diamond composite coatings

Wear ◽  
2000 ◽  
Vol 239 (1) ◽  
pp. 111-116 ◽  
Author(s):  
V.V.N Reddy ◽  
B Ramamoorthy ◽  
P.Kesavan Nair
Keyword(s):  
Wear Resistance ◽  
Composite Coatings ◽  
Diamond Composite ◽  
Electroless Ni

Reduction in Wear Rate of α-Alumina and Silicon Nitride by Diffusional Surface Modification

1988 ◽  
Vol 140 ◽  
Author(s):  
A.K. Gangopadhyay ◽  
M.E. Fine ◽  
H.S. Cheng
Keyword(s):  
Wear Resistance ◽  
Thermal Expansion ◽  
Surface Modification ◽  
Silicon Nitride ◽  
Thermal Expansion Coefficient ◽  
Expansion Coefficient ◽  
Surface Region ◽  
Lattice Parameter ◽  
Lower Thermal Expansion ◽  
Wear Modes

AbstractThe surface regions of α-alumina and hot pressed silicon nitride were modified by suitable alloying in order to improve their wear resistance. The surface modification in polycrystalline α-alumina was done by diffusing chromia into the surface region which resulted in the formation of a thin layer of A12O3 - Cr9O3 solid solution which has a lower thermal expansion coefficient than pure α-alumina. Also Cr2O3 has a larger lattice parameter than α-alumina thus during cooling the surface was put into compression. The surface region of hot pressed silicon nitride was modified by diffusing α-alumina into the surface which resulted in the formation of a thin sialon layer. A surface compressive stress was again introduced due to the lower thermal expansion coefficient and larger latticeparameter of sialon compared to silicon nitride.Wear tests were conducted against 52100 steel under both lubricated and unlubricated sliding contact using a block on ring apparatus. The wear resistance of chromia surface alloyed α-alumina was improved considerably over unalloyed α-alumina under both lubricated and unlubricated conditions. The wear resistance of alumina surface alloyed silicon nitride was also improved over unalloyed silicon nitride under both lubricated and unlubricated conditions.Different wear modes were identified by examining the worn surfaces under the scanning electron microscope.

Investigations on microstructure and wear resistance of Fe-Mo alloy coating fabricated by plasma transferred arc cladding

2018 ◽  
Vol 350 ◽  
pp. 480-487 ◽  
Author(s):  
Xinke Deng ◽  
Guojun Zhang ◽  
Tao Wang ◽  
Shuai Ren ◽  
Zhonglian Bai ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Alloy Coating ◽  
Plasma Transferred Arc ◽  
Transferred Arc

Surface modification of die steels with B—Al-layers by thermal-chemical treatment

2021 ◽  
pp. 557-564
Author(s):  
N.S. Ulakhanov ◽  
U.L. Mishigdorzhiyn ◽  
A.G. Tikhonov ◽  
A.I. Shustov ◽  
A.S. Pyatykh
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Surface Layer ◽  
Surface Modification ◽  
High Temperature ◽  
Chemical Treatment ◽  
Quality Parameters ◽  
Processing Temperature ◽  
Die Steels ◽  
Composite Layers

The effect of diffusion high-temperature boroaluminizing (HBA) on the mechanical properties and quality parameters of the surface layer of stamp steels 5KhNM and 3Kh2V8F is shown. An analysis of the microstructure and composition of diffusion composite layers obtained as a result of thermal-chemical treatment (TCT) is presented and the distribution of microhardness in these layers is studied depending on the formed borides and carbides. The influence of processing temperature modes of on the parameters of roughness was experimentally established and the wear resistance characteristics of the processed surfaces of the investigated materials were determined.

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