Test Method for Calibration and Operation of the Falex Block-on-Ring Friction and Wear Testing Machine

The progressing cavity pump (PCP) always works in the waxy oil well. Therefore the research on the influence of various liquid paraffin contents in crude oil on the friction and wear behaviors of the progressing cavity pump`s stator is very important for choosing the best stator rubber and developing the service life of PCP. Wear behavior of nitrile butadiene rubber (NBR) and fluororubber (FKM) was investigated at room temperature using a reciprocating friction and wear testing machine under the various paraffin contents in crude oil (0%、10%、30%、50%、100%). The wear morphology of blend was analyzed through the stereomicroscope and the wear behavior of two blends was also discussed and compared. The results show that the wear resistance of FKM is better than that of NBR under the same paraffin content in crude oil; With the increase of the paraffin content, the wear and coefficient of friction also increase. When the paraffin content in crude oil is less than 30%, the wear loss of NBR and FKM are basically the same; When the paraffin content in crude oil is more than 30%, the wear loss of NBR is far more than that of FKM.

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Study on the friction characteristics of 304 steel with composite surface modification

Industrial Lubrication and Tribology ◽

10.1108/ilt-03-2016-0051 ◽

2017 ◽

Vol 69 (2) ◽

pp. 248-258 ◽

Cited By ~ 2

Author(s):

Wengang Chen ◽

Xueyuan Liu ◽

Lili Zheng

Keyword(s):

Surface Modification ◽

Friction And Wear ◽

Steel Surface ◽

Testing Machine ◽

Wear Testing ◽

Tribological Characteristics ◽

Textured Surface ◽

Content Type ◽

Good Basis ◽

Modified Surface

Purpose This paper aims to clarify the friction properties of 304 steel surface modification. The surface modification includes laser texturing processing and nitriding treatment on 304 steel surface, and then the friction properties’ test was conducted on different friction directions and different upper test samples by using microfriction and wear testing machine. Design/methodology/approach The diameter and spacing of 100-, 150-, 200-, 300-μm pit array on the surface of 304 steel were calculated using a M-DPSS-50 semiconductor laser device. Then, the textured surface was nitriding-treated using a nitriding salt bath device. The chemical composition, surface morphology and surface microhardness of the composite-modified surface were measured by X-ray diffraction and by using an optical microscope and a microhardness tester. The tribological characteristics of the composite-modified surface were tested by MRTR microcomputer-controlled multifunctional friction and wear testing machine. Findings The result showed that a rule pit texture surface was obtained by the texture processing. The microhardness of nitriding treatment surface reached 574.27HV0.1, which significantly higher than 222.58HV0.1 of 304 steel. The composite-modified surface has excellent anti-friction and wear resistance properties when the upper specimen was GCr15 steel and ZrO2, respectively. The composite-modified surface has excellent anti-friction and anti-wear properties after long time friction under different angles. However, the friction coefficient and wear morphology of the friction pairs are not affected by the friction angle. Research limitations/implications Because of the chosen research approach, the research results may lack generalizability. Therefore, researchers are encouraged to test the proposed propositions further. Practical implications The paper conducted a systematic study of the tribological characteristics of 304 steel composite modification surface and provided a good basis for the extensive application of 304 steel. Social implications The study provides a good basis for the extensive application of 304 steel. Originality/value This paper fulfils an identified need to study the extensive application of 304 steel.

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Research on the Friction and Wear Properties of the Copper Matrix Composites Reinforced with Copperized Carbon Fibers

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.556-562.624 ◽

2014 ◽

Vol 556-562 ◽

pp. 624-627 ◽

Cited By ~ 2

Author(s):

Ran Xu ◽

Yong Wang ◽

Run Hong Liu ◽

Hao Zou

Keyword(s):

Carbon Fiber ◽

Carbon Fibers ◽

Friction And Wear ◽

Testing Machine ◽

Copper Matrix ◽

Wear Testing ◽

Wear Property ◽

Vacuum Sintering ◽

Graphite Composites ◽

Coated Carbon

The aim of this paper is to develop a kind of copper matrix self-lubricious material with excellent friction and wear characteristics. The copper-graphite composites reinforced with short copper-coated carbon fibers (CF-C/Cu) were successfully developed using techniques of mechanical alloying, composite plating and hot press vacuum sintering. For comparison, copper-graphite composites without short copper-coated carbon fibers (C/Cu) were made under the same process. The wear testing was carried out using a rapid wear testing machine (M-200).Friction coefficient was measured by a micro-wear tester (UMT).The microstructure, abrasive dust and worn surface of the wear pins on the different condition such as load and wear time were examined by SEM. It was noted that the addition of copper-coated carbon fiber in the Cu-based composites can retard the transformation process which transforms from micro-cutting wear to adhesive wear and delamination. The abrasion loss of the composites with short copper-coated carbon fibers appeared a valley when the load increased from 10N to 30N. It showed that the addition of copper-coated carbon fiber enhanced the anti-friction and anti-wear property of copper matrix composite and better than the sample without carbon fibers.

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Study on the Wear-Resisting Property of Wood Cu/Ni Electroplate Coating

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.123-125.1055 ◽

2010 ◽

Vol 123-125 ◽

pp. 1055-1058 ◽

Cited By ~ 1

Author(s):

Jin Tian Huang ◽

Jin Jia ◽

Kun Ling Tie

Keyword(s):

Contact Angle ◽

Wood Surface ◽

Friction And Wear ◽

Testing Machine ◽

Friction Torque ◽

Wear Testing ◽

Metal Coatings ◽

Bonding Force ◽

Metal Processing ◽

Electroplate Coating

In this study, wood surface was treated in metal processing using Cu/Ni electroplate methods. The bonding force and surface morphology between metal coatings and wood pores were measured by SEM. The non-lubricated friction was tested using the MMW-1 vertical universal friction and wear testing machine. Then the waterproof performance was measured by contact angle tester. The results show that the wood still remained original pore structure after treated by copper electroplate and nickel electroplate, but the surface had been completely covered by metal coating. The dense of coating was compact and uniformly distributed, the interfacial bonding was well. After the wood treated by Cu/Ni, the friction coefficient declined from 0.04-0.12 to 0.004 and 0.003, and the friction torque decreased from 10-30N.mm to 1N.mm, at the same time the average of hardness increased from 6.42HV to 93.18HV and 226.86HV. The treated metal-wood surface has higher wear-resisting property and hardness.

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Study on Repair Techniques of Loader pin Based on Remanufacturing

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.220-223.83 ◽

2012 ◽

Vol 220-223 ◽

pp. 83-86

Author(s):

Yu Ling Wang ◽

Yin Xiang Kong ◽

Bao Hua Wu

Keyword(s):

Abrasion Resistance ◽

High Speed ◽

Friction And Wear ◽

Testing Machine ◽

Surface Hardness ◽

Wear Testing ◽

Arc Spraying ◽

Flame Spray ◽

Electrical Arc ◽

The Way

Pins of loader are damaged easily, and most of them have been abandoned every year. Remanufacturing for pins can reduce waste of natural resources and energy sources. In this paper, pins with different abrasion loss were selected and remanufactured by electrical arc spraying and oxy-acetylene flame spray welding, respectively. Then, the parameters of remanufactured pins such as dimension, surface roughness, surface hardness and crack were measured. Furthermore, the friction and wear characteristics of the repair coating/nickel coating pair were tested under dry lubrication condition with the MRH-3 high-speed ring-block friction and wear testing machine. With the help of SEM (scanning electron microscope) to observe the surface morphology of blocks, abrasion resistance of spray welding coating and spray coating were analyzed. Results indicate that two remanufacturing techniques both can make the scrap pins as new products, but pins which are remanufactured in the way of oxy-acetylene flame spray welding have better abrasion resistance than the way of electrical arc spraying.

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