scholarly journals Comparison of the Friction and Wear Characteristics between Copper and Paper Based Friction Materials

Materials ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 2988 ◽  
Author(s):  
Yu ◽  
Ma ◽  
Chen ◽  
Li ◽  
Ma ◽  
...  
Keyword(s):  
Ambient Temperature ◽  
Friction And Wear ◽  
Applied Load ◽  
Friction Material ◽  
Wear Depth ◽  
Friction Materials ◽  
Wear Characteristics ◽  
Rotating Speed ◽  
Ambient Temperatures ◽  
Friction And Wear Characteristics

Copper-based friction material (CFM) and paper-based friction material (PFM) are the two most commonly used clutch friction materials. The friction and wear characteristics of these two kinds of friction materials under dry conditions were investigated by the pin-on-disc test over a broad range of applied loads, rotating speeds and ambient temperatures. Before experiments, the running-in test was conducted to stabilize the coefficient of friction (COF) and wear amount of the test samples. After experiments, the metallographic micrographs of the tested samples were presented to investigate the wear mechanisms. Experimental results showed that both the COF and wear depth of the CFM are much greater than these of PFM. The COF of CFM decreases with the increase of applied load, and changes slightly with the variation of rotating speed, whereas it increases first and then decreases with the increase of ambient temperature. However, the COF of PFM decreases dramatically with the increase of the rotating speed and ambient temperature, while it remains stable at first and then decreases slowly as the applied load increases. Additionally, under such three working conditions, the wear depth of CFM changes linearly, while the wear depth of PFM varies greatly. This study can be used as a guide for selecting friction materials for clutches with different applications.

Friction and Wear Characteristics of Cu-Based P/M Brake Friction Materials with Addition of Fe and C

2014 ◽  
Vol 661 ◽  
pp. 21-26 ◽  
Author(s):  
Talib Ria Jaafar ◽  
Mohd Asri Selamat ◽  
Z.J. Rusila ◽  
M.F. Ismail
Keyword(s):  
Powder Metallurgy ◽  
Friction Coefficient ◽  
Wear Mechanisms ◽  
Friction And Wear ◽  
Volume Loss ◽  
Friction Materials ◽  
Wear Characteristics ◽  
Weight Percentage ◽  
Two Samples ◽  
Friction And Wear Characteristics

Cu-based powder metallurgy friction materials were prepared by varying of Fe and C (% weight) in the friction components. The samples were compacted under the load of 24 metric tonnes and sintered at a temperature of 950 °C for 45 minutes. The friction and wear characteristics the materials developed were studied using Chase machine. The results show that Fe and C have different friction and wear characteristics. The friction coefficient of Cu-30%Fe-15%C sample maintained to be high and slightly increased after the drum temperature of 350°C and subsequently stable throughout tests. The friction of Cu-20%Fe-10%C stable until the drum temperature of 450°C and then its start to decay slightly until the end of the test. On the hand, the friction of Cu-10%Fe-5%C start to decay after sliding a few minutes at the drum temperature of 230°C. Thus, it could be postulated that the friction coefficient increased with increasing weight percentage of Fe and C in the friction components. However, the volume loss shows that there is no direct correlation with the Fe and C content. The volume loss of Cu-10%Fe-5%C was higher than the two samples which had the lowest hardness. On the hand, the volume loss of the Cu-30%Fe-15%C was slightly higher than Cu20%Fe-10%C as result of higher porosity and lower hardness. Wear mechanisms of abrasion, adhesion and thermal were observed to be operated during sliding process.

scholarly journals Friction and Wear Characteristics of Rubber Resin-Bonded Metallic Brake Pad Materials

2019 ◽  
Vol 8 (6) ◽  
pp. 1312-1316
Keyword(s):  
Friction And Wear ◽  
Physical And Mechanical Properties ◽  
Friction Material ◽  
Brake Disc ◽  
Brake Pad ◽  
Sliding Velocity ◽  
Wear Characteristics ◽  
Pin On Disc ◽  
Set Up ◽  
Friction And Wear Characteristics

This paper aims to present comparative study of friction and wear characteristics of non-asbestos rubber resin bonded metallic based brake pad material. Friction material was compression moulded and machined to a sample size. Their physical and mechanical properties were studied. Experiments were conducted using Pin-on-disc test set-up against EN31 disc. Coefficient of friction and wear was measured for metallic based brake materials at varying conditions of temperature, sliding velocity, pressure and sliding distance. When brake pads are in contact with brake disc, heat is generated hence thermal behaviour of metallic based brake material and its impact on friction and wear were studied. Experiments, based on Taguchi’s analysis technique, using L9 orthogonal array were performed. On the basis of experimental results and S/N ratio analyses, ranking of the parameters have been done. It was found that temperature (95.37 %) and sliding velocity (2.99 %) are most affecting parameters in friction, However temperature (82.96 %) and pressure (6.80) in wear. The elemental composition of metallic based brake material was measured by EDS technique. SEM micrographs of brake pad samples were tested at different magnifications. Further detailed studies are suggested to evaluate wear rate, stopping distance under simulative test conditions alternate to asbestos based brake pad material.

Friction and wear properties of three different steels against paper-based friction material

2019 ◽  
Vol 71 (10) ◽  
pp. 1206-1212
Author(s):  
Jianpeng Wu ◽  
Biao Ma ◽  
Heyan Li ◽  
Chengnan Ma
Keyword(s):  
Working Conditions ◽  
Friction And Wear ◽  
Friction Material ◽  
Wear Depth ◽  
Wear Properties ◽  
Heavy Load ◽  
Friction Materials ◽  
Content Type ◽  
Light Load ◽  
Friction And Wear Properties

Purpose The purpose of this paper is to study friction and wear properties of three types of steels against paper-based friction disc, including 65Mn, 20#steel and 30CrAl, so as to obtain the appropriate working conditions for different friction materials in the transmission system. Design/methodology/approach Based on actual working conditions, pin-on-disc tests are conducted on a universal material tester. The two evaluation indexes, including average friction coefficient and variation coefficient, are introduced to analyze the different friction properties among three types of steel. Furthermore, the temperature-dependent wear pattern and wear depth are subsequently studied. Findings The results show that 65Mn is more suitable for working under heavy load and low velocity, but 30CrAl and 20#steel are suitable for working under light load and high velocity. Moreover, wear primarily occurs on paper-based material and peaks at about 325. Practical implications This research of different materials and friction property for friction pairs is helpful to improve the performance and prolong the service life of transmission systems. Originality/value Suitable working conditions of different friction materials are obtained, and the correlation between wear and decomposition in high temperature is verified.

A preliminary investigation on the use of the pin-on-disc test to simulate off-brake friction and wear characteristics of friction materials

Wear ◽  
2018 ◽  
Vol 410-411 ◽  
pp. 202-209 ◽  
Author(s):  
Matteo Federici ◽  
Stefano Gialanella ◽  
Mara Leonardi ◽  
Guido Perricone ◽  
Giovanni Straffelini
Keyword(s):  
Friction And Wear ◽  
Preliminary Investigation ◽  
Friction Materials ◽  
Wear Characteristics ◽  
Pin On Disc ◽  
Friction And Wear Characteristics

scholarly journals Wear and Friction Characteristics of 65Mn Steel for Spike-Tooth Harrow

Coatings ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 319
Author(s):  
Zhiguo Lu ◽  
Chuanyu Du ◽  
Qingcai Chen ◽  
Tianying Niu ◽  
Na Wang ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Working Environment ◽  
Manganese Steel ◽  
Wear Loss ◽  
Variable Parameters ◽  
Wear Characteristics ◽  
Before And After ◽  
Set Up ◽  
Worn Surface ◽  
Friction And Wear Characteristics

The friction and wear characteristics of spike-tooth material (65Mn steel) of Spike-Tooth Harrow in a two-stage peanut harvester were studied in this paper. The friction and wear tests of pin and disc on 65 manganese steel were carried out on the tribometer, then the wear loss and the friction coefficient were studied. The wear loss of the pin was acquired by calculating the mass of the pin before and after the experiment using an electronic balance. According to the actual working environment of peanut spring-finger, four variable parameters are set up: load, speed, soil moisture and soil type. The friction and wear characteristics of pins were studied under different loads, speeds and different soil environments. After wearing, the worn surface of the material was observed by scanning microscope and the wear mechanism was studied. The experimental results show that the wear of the pin increases with the increase of load and decreases with the increase of rotational speed in the same rotation number. Especially in the case of the sandy soil with 20% in moisture, a maximum wear loss of the pin is achieved.

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