TY - JOUR
T1 - The Running-in Micro-Mechanism and Efficient Work Conditions of Cu-Based Friction Material against 65Mn Steel
AU - Wu, J.
AU - Ma, B.
AU - Li, H.
AU - Stanciulescu, I.
N1 - Publisher Copyright:
© 2019, The Society for Experimental Mechanics, Inc.
PY - 2019/12/1
Y1 - 2019/12/1
N2 - In order to investigate the running-in process of a dry friction pair made of Cu-based powder metallurgy material and 65Mn steel, well designed pin-on-disc tests are carried out. According to the running-in mechanism of Cu-based powder metallurgy material in the tests, the running-in process is divided into two periods, namely, the interface matching period and the plastic deformation period. Then, two division indexes (the average height Sa and the root mean square height Sq) are introduced as basis for dividing this two periods, which originate from the extraction and analysis of surface morphology of asperities on the contacting surface. In the same way, two running-in recognition indexes, including equivalent changing rate H and coefficient of variation D, are further put forward as measures to characterize the running-in progress, and their effectiveness is verified by tests. Based on the recognition indexes H and D, the influence of temperature, rotation speed and load on the running-in duration of the dry friction pair is studied, and the efficient condition of running-in process is obtained. The results show that, when H ≤ 1.9 × 10−3 and D ≤ 4.2 × 10−2, we can recognise that the running-in process is completed. The running-in duration is almost the shortest under the condition of (40 N, 1400 r/min, 160 °C), which is called the efficient running-in condition.
AB - In order to investigate the running-in process of a dry friction pair made of Cu-based powder metallurgy material and 65Mn steel, well designed pin-on-disc tests are carried out. According to the running-in mechanism of Cu-based powder metallurgy material in the tests, the running-in process is divided into two periods, namely, the interface matching period and the plastic deformation period. Then, two division indexes (the average height Sa and the root mean square height Sq) are introduced as basis for dividing this two periods, which originate from the extraction and analysis of surface morphology of asperities on the contacting surface. In the same way, two running-in recognition indexes, including equivalent changing rate H and coefficient of variation D, are further put forward as measures to characterize the running-in progress, and their effectiveness is verified by tests. Based on the recognition indexes H and D, the influence of temperature, rotation speed and load on the running-in duration of the dry friction pair is studied, and the efficient condition of running-in process is obtained. The results show that, when H ≤ 1.9 × 10−3 and D ≤ 4.2 × 10−2, we can recognise that the running-in process is completed. The running-in duration is almost the shortest under the condition of (40 N, 1400 r/min, 160 °C), which is called the efficient running-in condition.
KW - Cu-based powder metallurgy
KW - Friction coefficient
KW - Pin-on-disc tests
KW - Running-in process
UR - http://www.scopus.com/inward/record.url?scp=85074193299&partnerID=8YFLogxK
U2 - 10.1007/s40799-019-00323-1
DO - 10.1007/s40799-019-00323-1
M3 - Article
AN - SCOPUS:85074193299
SN - 0732-8818
VL - 43
SP - 667
EP - 676
JO - Experimental Techniques
JF - Experimental Techniques
IS - 6
ER -
