Preparation and Study of Cr-Nanodiamond Composite Co-Deposition

2011 ◽  
Vol 314-316 ◽  
pp. 160-164 ◽  
Author(s):  
En Zhong Li ◽  
Jiang Cun Li ◽  
Da Xiang Yang ◽  
Wei Ling Guo
Keyword(s):  
Composite Coating ◽  
Test Results ◽  
Maximum Hardness ◽  
Composite Plating ◽  
Plating Layer

The preparation of electrolyte and the technical flow were summarized, the chromium based nanodiamond composite coating was prepared by composite plating process. The metallography structure of plating layer was characterzied, and the hardness, the element of plating layer were tested, the test results and reaction principle were discussed. It was found that the addition of nanodiamond increased the hardness of the coatings. When the concentration of DND in electrolyte is 2.0-3.0g/L,the plating time is about 15-20min, the maximum hardness was obtained.

scholarly journals PENINGKATAN SIFAT MEKANIS BESI COR KELABU MELALUI PROSES TEMPERING

2018 ◽  
Vol 2 (2) ◽  
Author(s):  
A. Noor Setyo HD ◽  
Sri Widodo
Keyword(s):  
Cold Water ◽  
Hardness Test ◽  
Heating Time ◽  
Initial Energy ◽  
Test Results ◽  
Maximum Hardness ◽  
Quenching Temperature ◽  
Independent Variables ◽  
Hardness Tester ◽  
Water Media

This study aims to determine the Hardness and Toughness of cast iron after undergoing a Tempering process with independent variables heating time and dependent Hardness, microstructure and toughness Impack. Quenching was carried out at temperatures of 7750C, 8000C and 8250C in cold water media, while Tempering was carried out at temperatures of 2000C, 3000C and 4000C with a holding time of 15 minutes. Vickers Hardness test results using "Micro Hardness Tester" after Quenching have increased by an average of 95.6% at Quenching 7750C, 99.8% at Quenching 8000C and 107.1% at Quenching temperature 8250C from Hardness value of row material of 256.6 BHN or 260.8 VHN0,040. The maximum hardness value is obtained 531.4 BHN or 553.6 VHN 0,040 at Quenching temperature 8250C and the lowest Hardness of 501.8 BHN or 541,8 VHN0,040 at Quenching 7750C temperature, has Cementite phase as a matrix with little Martensite, is due to treatment The partial tempering of Martensite is replaced by the ferrite phase between Cementites. The results of the study concluded that at Tempering temperatures of 2000C, 3000C and 4000C, the toughness of FC 30 experienced an increase of 106.5%, 121.9% and 130.5% from the initial energy of 5.21 Joule / mm2, whereas violence decreased by 88, 6%, 80.8% and 40.4% of the original Hardness of 260.8 VHN 0,040

Friction Properties of Ni-P-SiC Composite Plating in Water

2019 ◽  
Vol 823 ◽  
pp. 117-122
Author(s):  
Norifumi Miyanaga ◽  
Jun Tomioka
Keyword(s):  
Wear Resistance ◽  
Composite Coating ◽  
Room Temperature ◽  
Frictional Coefficient ◽  
High Hardness ◽  
Wear Properties ◽  
Practical Applications ◽  
Composite Plating ◽  
Sic Particles ◽  
Plate Type

Electroless nickels have been used in practical applications as versatile materials for anti-wear. The wear resistance is well-improved as a composite coating by incorporating particles. Composite platting offers various mechanical and electoronic functions, depending on the combination of a material matrix and particles deposited. Among them Ni-P plating reinforced with SiC particles have been growing in importance owing to its high hardness and better anti-wear properties. In this study, a Ni-P-SiC/Ni-P-SiC system was evaluated using a ball-on-plate type reciprocating tester, and the results were compared with that of SiC/SiC system at room temperature. As the results, the Ni-P-SiC/Ni-P-SiC system with the surfaces where SiC particles were appeared in clumps had the low frictional coefficient around 0.1 even in water.

Development of Cu Brazing Sheet with Cu-P Composite Plating

2007 ◽  
Vol 353-358 ◽  
pp. 2025-2028 ◽  
Author(s):  
Ikuo Shohji ◽  
Susumu Arai ◽  
Naoki Kano ◽  
Noboru Otomo ◽  
Masahisa Uenishi
Keyword(s):  
Joint Strength ◽  
Composite Layer ◽  
Sulfate Solution ◽  
Copper Sulfate Solution ◽  
Composite Plating ◽  
Cu Alloys ◽  
Plating Method ◽  
Brazed Joint ◽  
Plating Layer ◽  
Start Temperature

A Cu brazing sheet has been developed using a Cu-P composite plating method. A Cu-P composite plating layer, which contains 7mass%P, was formed on a Cu plate with a copper sulfate solution including P particles. The melting start temperature of the Cu-P composite layer was determined to be approximately 765°C. Microstructure and joint strength of a brazed joint with the Cu-P composite layer were investigated and compared with those of the joint with a conventional Cu-7P filler foil. As the results of the study, it was clarified that the Cu-P composite layer developed is feasible to use as a brazing material for Cu and Cu alloys.

Research on Ni-P-Carbon-Nanotube Electro-Brush Plating Composite Coating Technology

2014 ◽  
Vol 940 ◽  
pp. 24-27
Author(s):  
Yu Feng Zhang ◽  
Jian Cheng Wang ◽  
Xue Bing Liao ◽  
Jie Lei
Keyword(s):  
Composite Material ◽  
Carbon Nanotube ◽  
Bond Strength ◽  
Composite Coating ◽  
Ph Value ◽  
Coating Technology ◽  
Composite Plating ◽  
Plating Solution ◽  
Carbon Nanotube Composite ◽  
Brush Plating

A film of Ni-P-Carbon-nanotube composite material is deposited on the surface of the metal substances by electro-brush plating. In this process, the composition of the Ni-P-Carbon-nanotube composite plating solution, the pretreatment on the carbon-nanotube and the effects on quality by the different brush plating technology conditions are investigated. The results shows that carbon-nanotube particles can be distributed uniformly in the coating by oxidizing, sensitizing and activating while the temperature of the plating solution should be controlled at 55°C, and PH value, 1.5~2.5. After the carbon-nanotube is added, the coating defects, such as the crack, the desquamation and the low bond strength, can be prevent effectively.

Study of Properties of Ni-Base Nano-ZrO2 Composite Plating Coatings

2011 ◽  
Vol 239-242 ◽  
pp. 1452-1456
Author(s):  
Lei Zhang ◽  
Ben Liang Sun ◽  
Lin Wang ◽  
Yang Xu ◽  
Yang Li ◽  
...  
Keyword(s):  
Current Density ◽  
Base Alloy ◽  
Bath Temperature ◽  
Cathode Current Density ◽  
Copper Plate ◽  
Optimum Process ◽  
Optimum Process Parameter ◽  
Composite Plating ◽  
Cathode Current ◽  
Plating Layer

The surface of copper plate of the mold need to be reinforced to obtain the plating coatings with high hardness and corrosion resistant properties. Nowadays, Ni-base alloy coatings is used widely in the industrial production. In order to raise the service life of mold, the experiments on the property of Ni-base nano ZrO2 composite plating coatings was done in this paper. The experiments were planned with the orthogonal test design method. The effective factors on the property of coatings, bath temperature, cathode current density, the distance between two electrodes and the magnitude of Nano-ZrO2,were experimentally studied. The optimum process parameter were obtained. The results show that the composite plating layer of Ni-base Nano ZrO2 with good properties can be obtained.The optimal conditions are as follows: the bath temperature is 40 °C, cathode current density is 3A/dm2, the distance between two electrodes is 12 cm, the magnitude of Nano-ZrO2 is 12g/L. In addition binding strength of the coatings were measured quantitatively, and the structure of the plating layer were observed with SEM. The layer with good properties can be obtained in this method.

scholarly journals Erosion Resistance Properties of Iron–Carbon Composite Plating to Molten Lead-Free Solder

2019 ◽  
Vol 9 (13) ◽  
pp. 2724 ◽  
Author(s):  
Jun Watanabe ◽  
Kenji Hatsuzawa ◽  
Shigeyuki Ogata ◽  
Shinichi Yoshida ◽  
Ikuo Shohji
Keyword(s):  
Erosion Resistance ◽  
Lead Free ◽  
Resistance Testing ◽  
Filler Materials ◽  
Lead Free Solder ◽  
Graphite Composite ◽  
Erosion Depth ◽  
Composite Plating ◽  
Free Solder ◽  
Plating Layer

The use of Sn-3mass%Ag-0.5mass%Cu lead-free solder (SAC305) has become common. Since SAC305 has a higher content of tin than conventional tin–lead eutectic solder, erosion of the Fe plating layer used in the solder iron tip and the point soldering machine nozzle frequently occurs. In this study, to prolong the life of the Fe plating layer, the applicability of composite plating in which a carbon-type filler is compounded with Fe was studied. Graphite and a multi-walled carbon nanotube (MWCNT) were used as filler materials in the composite plating layer. For both Fe-graphite and Fe-MWCNT composite plating layers, solderability testing and erosion-resistance testing were carried out. In the solderability test, although the spread rates of SAC305 to both Fe-graphite and Fe-MWCNT plating layers slightly decreased compared to the Fe plating layer, SAC305 solder was not repelled against both plating layers. In the erosion-resistance test, the Fe-MWCNT composite plating layer performed the best with the least erosion depth. The erosion depth of the Fe-graphite composite plating layer and the Fe plating layer were 10 and 100 times larger than that of the Fe-MWCNT composite plating layer, respectively. It was confirmed that the diffusion of Fe into molten SAC305 could be greatly reduced due to the composing carbon filler in Fe.

TiCN Cermet Composite Coating Prepared By Reaction Nitrogen Arc Welding Cladding Process

2012 ◽  
Vol 190-191 ◽  
pp. 581-584
Author(s):  
Jian Jun Hao ◽  
Lu Ping Ma ◽  
Liang Gao ◽  
Yue Jin Ma ◽  
Jian Guo Zhao
Keyword(s):  
Composite Coating ◽  
Arc Welding ◽  
Ball Mill ◽  
Steel Substrate ◽  
Frictional Coefficient ◽  
Test Results ◽  
X Ray ◽  
Microhardness Distribution ◽  
Electronic Microscope ◽  
Microhardness Tester

A TiCN cermet composite coating was fabricated on 45# steel substrate by reaction nitrogen arc welding cladding technique. The mixture powder of titanium and graphite was preplaced onto the 45# steel substrate after intensive mixing by star ball-mill and gluing with starch binder. The microstructures and phase of the coatings, interracial behavior between coatings and the substrate were investigated by scanning electronic microscope, X-ray diffractometer. The microhardness distribution of the coating section, frictional coefficient, abrasion loss and wearing surface morphology were investigated by microhardness tester, abrasion machine and scanning electronic microscope. The results show that an excellent bonding between the coatings and the 45# steel substrate is ensured by the strong metallurgical interface and phase of the coatings are mainly composed of TiCN. The highest microhardness of the coatings reaches HV 0.5 810, which is about 3 times more than that of the 45# steel substrate. The anti-abrasive test results show the coating has better anti-abrasive performance than the 45# steel substrate.

The Effect of Low-Intensity Static Magnetic Field on Ni-P-PTFE Electroless Composite Plating Coatings

2016 ◽  
Vol 717 ◽  
pp. 112-117
Author(s):  
Jun Ying Hou ◽  
Hong Jiang Gao ◽  
Xiao Lin Liu ◽  
Yu Jiao ◽  
Li Liu
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Field Strength ◽  
Composite Coating ◽  
Magnetic Field Strength ◽  
Composite Coatings ◽  
Magnetic Field Direction ◽  
Composite Plating ◽  
External Magnetic Field Strength ◽  
New Processing

A new processing concept has been developed to produce Ni-P-PTFE electroless composite coating. This method combines magnetic field and electroless composite plating techniques to prepare high-quality Ni-P-PTFE electroless composite coating. The influence of magnetic on composite plating process and coatings performance by changing some factors such as the plating time, magnetic field strength, magnetic field direction. The results indicate that the external magnetic field improved deposition rate and the PTFE particles content of composite coatings, meanwhile, some performances of composite coating like thickness, corrosion resistance, were effected by external magnetic field strength. Therefore, the method combines magnetic field and electroless completing techniques had a wide application prospect in the aspect of improving the properties of electroless composite coating.

Properties of Pulse Plating Ni-SiC Nano-Composite Coating

2011 ◽  
Vol 291-294 ◽  
pp. 228-232
Author(s):  
Ji Qun Zhang ◽  
Hui Ming Jin ◽  
Ji Cheng Gao ◽  
Jun Shi ◽  
Lu Li
Keyword(s):  
Grain Size ◽  
Electron Microscope ◽  
Composite Coating ◽  
Nickel Coating ◽  
Pure Nickel ◽  
Nano Composite ◽  
Composite Plating ◽  
Transmission Electron ◽  
Nano Composite Coating ◽  
Scanning Electron

A Ni-SiC nano-composite plating coating was prepared by using composite plating technology adding nano-SiC in the bath.Then the surface morphology was examined by scanning electron microscope (SEM), the transmission electron microscope (TEM) was used to study the grain size,the porosity, corrode-resistant, combines intensity and wearability of the composite plating coating were also tested and contrasted the result with the pure nickel coating. The results shows the surface of Ni-SiC composite coating are more uniform and compact for the adding of nano-Sic refined the grain, the wear resistance,microhardness and corrosion resistance of the composite coating are also significantly improved.

MICROSTRUCTURE PERFORMANCE OF La2O3-MODIFIED TUNGSTEN INERT GAS CLAD COMPOSITE COATING

2019 ◽  
Vol 27 (07) ◽  
pp. 1950182
Author(s):  
MO-LIN SU ◽  
JIA-NING LI ◽  
FEI-HU SHAN ◽  
KE-GAO LIU ◽  
HUI-LIN XU
Keyword(s):  
Wear Resistance ◽  
Composite Coating ◽  
Inert Gas ◽  
Hard Coating ◽  
Wear Property ◽  
Test Results ◽  
Alloy Substrate ◽  
Tc4 Alloy ◽  
Surface Performance

A hard coating free of obvious defects is produced on a Ti–6Al–4V (TC4) alloy substrate by means of tungsten inert gas clad (TIGC) of the Deloro22–WC–La2O3 mixed powders, which greatly increased the surface performance of the substrate. Test results indicated that large quantities of needle-shape precipitates were formed in the Deloro22–WC TIGC coating, increasing the microhardness significantly, and also lots of pores are produced in this coating, weakening the wear resistance. It was noted that a fine/compact microstructure is obtained in the Deloro22–WC–La2O3 TIGC coating, also the defects cannot be observed obviously. La2O3 addition can effectively improve the fluidity of melt and hinder the growth of grains in TIGC pool, favoring a fine/compact microstructure to be produced, and also improving the wear property of the TIGC coating.

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