论文部分内容阅读
1. College of Science, Yanshan University, Qinhuangdao 066004, China
2. College of Materials Science and Engineering, Yanshan University, Qinhuangdao 066004, China
Received: October 08, 2011 / Accepted: November 25, 2011 / Published: April 25, 2012.
Abstract: The influence of loads and sliding speed on friction and wear properties of Cu-based alloy sliding against GCr15 steel were studied on a MMU-200 tester, and the worn surface morphologies were also analyzed by scanning electron microscope. The results show that as loads and sliding speed increase, the wear loss weight of the Cu alloy increases, and the friction coefficient of the Cu alloy slightly increase with the increase of loads and sliding speed, but less variation. As a result, the dominant wear forms was plough wear, and adhesive wear aggravated under high sliding speed and heavy load.
Key words: Cu alloy, friction and wear, loads and sliding speed.
GCr15 steel. Besides, the oxide layer caused by the friction heat can have the effect of lubricate, the result is that the degree of wear loss decreases and wear loss rate is low. The addition of rare earths can decrease the disadvantages including air hole, pin hole and loosen caused by impurity in structure of alloy, and can refine the structure of alloy, increase the strength of crystal boundary and enhance the resistance of the plastic deformation and the ability of load of the surface of wear loss metal [12, 13], which is beneficial to improve resistance wear of alloy. 4. Conclusions
When Cu-based alloy sliding against GCr15 steel in the sliding speed range of 0.056-0.448 m/s and the load range of 50-125 N, the wear loss weight increase with the increasing of the load and the sliding speed, the wear loss rate increases as the increase of the load and increase at first, then decreases with the increase of the sliding speed. When the sliding speed is 0.112 m/s, the wear loss rate of the alloy is maximum.
The friction coefficient of Cu-based alloy slightly increase with the increase of loads and sliding speed increase, as a results, the dominant wear forms was plough wear, and adhesion wear aggravated under high sliding speed and heavy load. Mortensen, Improvement of elevated temperature mechanical properties of Cu-Ni-Sn-Pb alloys, Materials Science and Engineering A 527 (2010) 4326-4333.
[2] H.T. Zhou, J.W. Zhong, X. Zhou, Z.K. Zhao, Q.B. Li, Microstructure and properties of Cu-1.0Cr-0.2Zr-0.03Fe alloy, Materials Science and Engineering A 498 (2008) 225-230.
[3] C.M. Liu, N. Liu, X.L. Zeng, Z.Y. Chen, H.Z. Li, L. Xu, Effects of deformation aging on mechanical properties and electricity conductivity of Cu-Ni-Be alloy, Journal of Central South University 41 (2010) 508-513.
[4] J.F. Wang, S.G. Jia, S.H. Chen , K.X. Song, P. Liu, G.J. Yu, Effect of aging precipitation on properties of Cu-Ni-Si-Mg alloy, Advanced Materials Research 197-198 (2011) 1315-1320.
[5] M.W. Tu, D.F. Wang, Effect of precipitates on recrystallization of Cu-Ni-Si alloy, Transactions of Materials and Heat Treatment 32 (2011) 47-51.
[6] D. Empl, V. Laporte, E. Vincent, N. Dewobroto, A. Mortensen, Improvement of elevated temperature mechanical properties of Cu-Ni-Sn-Pb alloys, Materials Science and Engineering A 527 (2010) 4326-4333.
[7] U. Sari, Influences of 2.5wt% Mn addition on the microstructure and mechanical properties of Cu-Al-Ni shape memory alloys, International Journal of Minerals, Metallurgy and Materials 17 (2010) 192-198.
[8] C. Watanabe, F. Nishijima, R. Monzen, K. Tazaki, Mechanical properties of Cu-4.0wt%Ni-0.95wt%Si alloys with and without P and Cr addition, Materials Science Forum561-565 (2007) 2321-2324.
[9] Y.T. Ning, X.H. Zhang, G.Y. Qin, Influence of cerium addition on microstructure and properties of Cu-Ag alloy in situ filamentary composites, Journal of Rare Earths 23(2005) 392-398.
[10] X.L. Lu, F. Chen, W.S. Li, Y.F. Zheng, Effect of Ce addition on the microstructure and damping properties of Cu-Al-Mn shape memory alloys, Journal of Alloys and Compounds 480 (2009) 608-611.
[11] P. Dang, L.S. Zhao, H.Y. Lu, D.X. Tang, Effect of rare earth on microstructure and properties of pure copper, Rare Metals12 (1993) 277-280.
[12] Z.W. Wu, Y. Chen, L. Meng, Effects of rare earth elements on annealing characteristics of Cu-6wt.%Fe composites, Journal of Alloys and Compounds 477 (2009) 198-204.
[13] X.Y. Mao, F. Fang, J.Q. Jiang, R.S. Tan, Effect of rare earth on the microstructure and mechanical properties of as-cast Cu-30Ni alloy, Rare Metals 28 (2009) 590-595.
2. College of Materials Science and Engineering, Yanshan University, Qinhuangdao 066004, China
Received: October 08, 2011 / Accepted: November 25, 2011 / Published: April 25, 2012.
Abstract: The influence of loads and sliding speed on friction and wear properties of Cu-based alloy sliding against GCr15 steel were studied on a MMU-200 tester, and the worn surface morphologies were also analyzed by scanning electron microscope. The results show that as loads and sliding speed increase, the wear loss weight of the Cu alloy increases, and the friction coefficient of the Cu alloy slightly increase with the increase of loads and sliding speed, but less variation. As a result, the dominant wear forms was plough wear, and adhesive wear aggravated under high sliding speed and heavy load.
Key words: Cu alloy, friction and wear, loads and sliding speed.
GCr15 steel. Besides, the oxide layer caused by the friction heat can have the effect of lubricate, the result is that the degree of wear loss decreases and wear loss rate is low. The addition of rare earths can decrease the disadvantages including air hole, pin hole and loosen caused by impurity in structure of alloy, and can refine the structure of alloy, increase the strength of crystal boundary and enhance the resistance of the plastic deformation and the ability of load of the surface of wear loss metal [12, 13], which is beneficial to improve resistance wear of alloy. 4. Conclusions
When Cu-based alloy sliding against GCr15 steel in the sliding speed range of 0.056-0.448 m/s and the load range of 50-125 N, the wear loss weight increase with the increasing of the load and the sliding speed, the wear loss rate increases as the increase of the load and increase at first, then decreases with the increase of the sliding speed. When the sliding speed is 0.112 m/s, the wear loss rate of the alloy is maximum.
The friction coefficient of Cu-based alloy slightly increase with the increase of loads and sliding speed increase, as a results, the dominant wear forms was plough wear, and adhesion wear aggravated under high sliding speed and heavy load. Mortensen, Improvement of elevated temperature mechanical properties of Cu-Ni-Sn-Pb alloys, Materials Science and Engineering A 527 (2010) 4326-4333.
[2] H.T. Zhou, J.W. Zhong, X. Zhou, Z.K. Zhao, Q.B. Li, Microstructure and properties of Cu-1.0Cr-0.2Zr-0.03Fe alloy, Materials Science and Engineering A 498 (2008) 225-230.
[3] C.M. Liu, N. Liu, X.L. Zeng, Z.Y. Chen, H.Z. Li, L. Xu, Effects of deformation aging on mechanical properties and electricity conductivity of Cu-Ni-Be alloy, Journal of Central South University 41 (2010) 508-513.
[4] J.F. Wang, S.G. Jia, S.H. Chen , K.X. Song, P. Liu, G.J. Yu, Effect of aging precipitation on properties of Cu-Ni-Si-Mg alloy, Advanced Materials Research 197-198 (2011) 1315-1320.
[5] M.W. Tu, D.F. Wang, Effect of precipitates on recrystallization of Cu-Ni-Si alloy, Transactions of Materials and Heat Treatment 32 (2011) 47-51.
[6] D. Empl, V. Laporte, E. Vincent, N. Dewobroto, A. Mortensen, Improvement of elevated temperature mechanical properties of Cu-Ni-Sn-Pb alloys, Materials Science and Engineering A 527 (2010) 4326-4333.
[7] U. Sari, Influences of 2.5wt% Mn addition on the microstructure and mechanical properties of Cu-Al-Ni shape memory alloys, International Journal of Minerals, Metallurgy and Materials 17 (2010) 192-198.
[8] C. Watanabe, F. Nishijima, R. Monzen, K. Tazaki, Mechanical properties of Cu-4.0wt%Ni-0.95wt%Si alloys with and without P and Cr addition, Materials Science Forum561-565 (2007) 2321-2324.
[9] Y.T. Ning, X.H. Zhang, G.Y. Qin, Influence of cerium addition on microstructure and properties of Cu-Ag alloy in situ filamentary composites, Journal of Rare Earths 23(2005) 392-398.
[10] X.L. Lu, F. Chen, W.S. Li, Y.F. Zheng, Effect of Ce addition on the microstructure and damping properties of Cu-Al-Mn shape memory alloys, Journal of Alloys and Compounds 480 (2009) 608-611.
[11] P. Dang, L.S. Zhao, H.Y. Lu, D.X. Tang, Effect of rare earth on microstructure and properties of pure copper, Rare Metals12 (1993) 277-280.
[12] Z.W. Wu, Y. Chen, L. Meng, Effects of rare earth elements on annealing characteristics of Cu-6wt.%Fe composites, Journal of Alloys and Compounds 477 (2009) 198-204.
[13] X.Y. Mao, F. Fang, J.Q. Jiang, R.S. Tan, Effect of rare earth on the microstructure and mechanical properties of as-cast Cu-30Ni alloy, Rare Metals 28 (2009) 590-595.