Study on the relationship between the hardness and wear resistance of iron plating layer and the concentration of B 4 C in the plating solution

2020 ◽  
Vol 2 (1) ◽  
pp. 20-26
Author(s):  
Yang Lili ◽  
Zhang Xiaoshan
Keyword(s):  
Wear Resistance ◽  
Plating Solution ◽  
The Relationship ◽  
Plating Layer ◽  
Iron Plating

The Influences of the Plating’s Hardness, Abrasion and Antifriction Property Caused by the Adding of Nano- Al2O3 and PTFE

2012 ◽  
Vol 557-559 ◽  
pp. 1683-1686 ◽  
Author(s):  
Xiao Feng Xu ◽  
Wen Bin Yao ◽  
Jiu Hua Xu ◽  
Wei Zhang ◽  
Lin Yang ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Antifriction Property ◽  
Chemical Plating ◽  
Composite Plating ◽  
Plating Solution ◽  
Alloy Plating

Composite plating Ni-P-PTFE- nano- Al2O3was made by adding nano-scaled Al2O3and PTFE into chemical plating Ni-P alloy plating solution. The influences of the plating material’s hardness, abrasion and antifriction property caused by the additive amount of nano- Al2O3and PTFE were studied in the paper. The results indicate that the composite plating’s hardness, wear resistance and antifriction can be greatly improved by adding nano- Al2O3and PTFE into it.

Experimental Study on Friction and Wear between Drill Collar and Casing

2016 ◽  
Vol 847 ◽  
pp. 460-465
Author(s):  
Ben Sheng Huang ◽  
Yao Zhu
Keyword(s):  
Heat Treatment ◽  
Wear Resistance ◽  
Oil And Gas ◽  
Wear Test ◽  
Hardness Test ◽  
Oil And Gas Fields ◽  
Key Issues ◽  
Gas Fields ◽  
The Relationship ◽  
Drill Collar

Casing wear is one of the key issues in the development of oil and gas fields and in the process of drilling operations. In this study, the relationship between hardness and wear resistance of drill collar and casing was studied; thereby the wear conditions between the two materials were improved. Chemical analysis, optical microscopy, hardness test and friction wear test were conducted to study the effects of heat treatment on hardness of the drill collar 4145H and the casing 30Mn5V, and discuss the relationship between hardness and wear resistance of them. The results showed that the materials of drill collar and casing after different heat treatment had varying degrees of wear, both of the respective wear amounts were gradually increasing with the increase of hardness of them, the wear extent of casing material was greater than that of drill collar material. The hardness of casing material was the lowest and its wear resistance was the best when quenching at 880°C and tempering at 630°C. And when quenching at 900°C and tempering at 690°C, the hardness of drill collar material was the lowest and its wear resistance was the best. Therefore, the hardness of drill collar and casing can be improved by changing the heat treatment process to improve the wear resistance, thereby reducing the wear conditions between them.

scholarly journals Study on Tribological Properties and Mechanisms of Different Morphology WS2 as Lubricant Additives

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1522 ◽  
Author(s):  
Ningning Hu ◽  
Xiuheng Zhang ◽  
Xianghui Wang ◽  
Na Wu ◽  
Songquan Wang
Keyword(s):  
Wear Resistance ◽  
Optimum Condition ◽  
Lubricating Oil ◽  
Stribeck Curve ◽  
Extreme Pressure ◽  
Friction Process ◽  
Wide Range ◽  
The Coefficient Of Friction ◽  
The Relationship ◽  
Better Than

In the present work, the relationship curve of the coefficient of friction (COF) with varying loads of different morphology WS2 lubricating additives in the friction process at various sliding speeds was studied. On this basis, wear marks and elements on the wear surfaces after friction were analyzed, and then the anti-wear and mechanism effects of WS2 of different forms in the lubrication process were discussed. Meanwhile, the Stribeck curve was used to study the lubrication state of the lubricating oil in the friction process. It was revealed that the COF of lubricating oil containing lamellar WS2 decreased by 29.35% at optimum condition and the minimum COF was concentrated at around 100 N. The COF of lubricating oil containing spherical WS2 decreased by 30.24% and the minimum coefficient was concentrated at 120 N. The extreme pressure property of spherical WS2 was better than that of lamellar WS2, and the wear resistance of spherical WS2 was more stable when the load was over 80 N. The different morphology of WS2 additives can play anti-wear and anti-friction roles within a wide range of sliding speeds.

Preparation and properties of duplex NI-P-TIO2/NI nanocomposite coatings

2019 ◽  
Vol 33 (01n03) ◽  
pp. 1940019 ◽  
Author(s):  
Weihui Zhang ◽  
Di Cao ◽  
Yanxin Qiao ◽  
Yuxin Wang ◽  
Xiang Li ◽  
...  
Keyword(s):  
Mechanical Property ◽  
Wear Resistance ◽  
Corrosion Resistance ◽  
Porous Structure ◽  
Outer Layer ◽  
Nanocomposite Coating ◽  
Nanocomposite Coatings ◽  
Coating Properties ◽  
Duplex Coating ◽  
Plating Solution

Duplex Ni-P-TiO2/Ni coatings were deposited on the brass substrate by using two baths. Ni-P-TiO2 nanocomposite coatings were electroplated as the outer layer on the Ni-plated brass substrate by adding transparent TiO2 sol (0–50 mL/L) into the Ni-P plating solution. The microstructure, mechanical property and corrosion resistance of the duplex Ni-P-TiO2/Ni nanocomposite coatings were systemically investigated. The results show that the interface of duplex coating was uniform and the adhesion between two layers was extremely good. The microhardness of duplex Ni-P-12.5 mL/L TiO2 /Ni coating was [Formula: see text]616 HV[Formula: see text] compared to [Formula: see text]539 HV[Formula: see text] of Ni-P /Ni coating and [Formula: see text]307 HV[Formula: see text] of single Ni coating. Meanwhile, the wear resistance and the corrosion resistance of the duplex nanocomposite coating have also been improved remarkably compared with single Ni coating. However, adding excessive TiO2 sol (more than 12.5 mL/L) caused the agglomeration of TiO2 nanoparticles and led to a porous structure in the outer layer, resulting in the deterioration of coating properties.

The Relationship between Nanocrystalline Structure and Frictional Properties of Nanodiamond/Ni Composite Coatings by Brush Plating

2011 ◽  
Vol 80-81 ◽  
pp. 683-687 ◽  
Author(s):  
Ying Li ◽  
Bian Xiao Li ◽  
Wen Jun Zou
Keyword(s):  
Wear Resistance ◽  
Composite Coating ◽  
Composite Coatings ◽  
Nanocrystalline Structure ◽  
Work Piece ◽  
Reciprocating Motion ◽  
Frictional Properties ◽  
Second Phases ◽  
Brush Plating ◽  
The Relationship

Nanodiamond/Ni and Ni coatings were fabricated via brush plating. Nanocrystalline structure of the composite coating was investigated by SEM and XRD. The results showed that the composite coatings are nanocrystalline structure. The hardness of the nanodiamond/Ni composite coating is higher greatly than that of Ni coating. At same time, the reasons of formation nanocrystalline were discussed, which include the nucleation rate with the increase of a high over-potential, the reciprocating motion between brush and work piece, the heterogeneous nucleation of nanodiamond. The nanodiamonds as second phases make grain finer. The nanodiamonds of core-shell structure play the important role in wear resistance and antifriction. So the wear resistance of the composite coatings is significantly higher than nickel coating’s.

Preparation of WS2/MoS2/C Composite Films and their Tribological Properties

2009 ◽  
Vol 79-82 ◽  
pp. 711-714
Author(s):  
Lei Zhou ◽  
Gui Lin Yin ◽  
Yu Dong Wang ◽  
Zhen Yu ◽  
Dan Nong He
Keyword(s):  
Wear Resistance ◽  
Friction Coefficient ◽  
Room Temperature ◽  
Composite Films ◽  
Tribological Performance ◽  
Atmospheric Conditions ◽  
Composite Target ◽  
Mos2 Film ◽  
Order Of Magnitude ◽  
The Relationship

WS2/MoS2/C composite lubricating films were prepared in an Ar/C2H2 atmosphere by magnetron reaction-sputtering using a WS2/MoS2 composite target. The relationship between the microstructure and the tribological performance of the films was investigated. The composite film has a compact microstructure, which is shown to have much superior tribological performance with lower friction coefficient and better wear resistance than pure MoS2 film in humid atmospheric conditions at room temperature. An increase in hardness of nearly one order of magnitude was reached, too.

Nanostructured Cermet Coatings with Enhanced Properties Produced by HVOF Thermal Spray

2008 ◽  
Vol 587-588 ◽  
pp. 1024-1028 ◽  
Author(s):  
S. Dosta ◽  
J.R. Miguel ◽  
J.M. Guilemany
Keyword(s):  
Wear Resistance ◽  
Nanostructured Coating ◽  
Important Improvement ◽  
Hvof Thermal Spray ◽  
Enhanced Properties ◽  
Xrd Techniques ◽  
The Relationship ◽  
Oxygen Fuel ◽  
Spraying Process ◽  
Flight Measurements

There is an increasing interest in the last years for materials with nanometric grain size because of the enhanced properties that could be achieved when reducing to the nanometric scale. Three coatings using conventional, nanostructured and bimodal (mixture of conventional and nano) WC-Co powders were obtained through High Velocity Oxygen-Fuel (HVOF) technique. The powders were sprayed under different spraying conditions in order to improve trybological properties for nanostructured powders. The relationship between spraying conditions and decomposition has been studied using in-flight measurements and XRD techniques. The nanostructured coating showed more decomposition than the other ones during spraying process, but this decomposition was reduced through the new conditions. Nanostructured coating showed more hardness using producer conditions, but the bimodal coating showed better abrasive and friction wear resistance. Nanostructured and bimodal coatings also provided an enhanced corrosion protection to the substrate when compared with the conventional one. An important improvement in the abrasive wear resistance for the nanostructured coating was obtained with the new conditions, due to the reduction in the decomposition.

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