采用粉末冶金方法制备了Ni-Cr基自润滑复合材料,研究了Ni20Cr-石墨与Ni20Cr-10W-石墨复合材料中石墨含量和添加W后对材料力学性能和摩擦性能的影响.结果表明：随着石墨体积分数的增加,Ni20Cr-石墨复合材料的显微硬度和致密度不断降低;将石墨添加到Ni20Cr-10W复合材料中,材料摩擦系数明显降低,在每个试验温度下,复合材料的摩擦系数都随石墨含量的增加出现先增加后降低的变化规律;在Ni20Cr-石墨复合材料中添加体积分数10%的W后,复合材料显微硬度有所增加;当石墨体积分数为10%时,材料的摩擦系数在各个试验温度下均有所增加,当石墨体积分数为5%和15%时,复合材料的摩擦系数在整个温度范围内均有所降低;在整个温度范围内,Ni20Cr-10W-15石墨复合材料的摩擦系数最低.
The influences of graphite on the tribological properties of Ni - Cr - based and Ni - Cr - W-based self-lubricating composites content prepared by powder metallurgy were investigated. The results show that the micro-hardness and density of Ni20Cr - graphite composites gradually reduced with the increase of graphite. The micro-hardness of composites has increased after adding 10% of W into Ni20Cr - graphite composite mate- rials. Adding graphite into Ni20Cr - 10W composite, the friction coefficients have reduced to a great extent. With the increase of graphite, the friction coefficient first increased, and then reduced. The friction coefficients of composites increased at any temperature, when the graphite content was 10%. However, the friction coeffi- cient decreased at any temperature when the graphite content was 5% and 15%. The friction coefficient of Ni20Cr- 10W- 15graphite composite is the lowest.
参考文献
| [1] | 薛群基,吕晋军.高温固体润滑研究的现状及发展趋势[J].摩擦学学报,1999(01):91-96. |
| [2] | 李玉峰,欧阳家虎,周玉.高温固体润滑材料研究的发展现状[J].热处理技术与装备,2007(06):2-5,9. |
| [3] | 张祥林,乔晓勇,章小峰,王爱华.高温固体自润滑涂层的发展[J].新技术新工艺,2006(11):7-11. |
| [4] | C. Ferrer;M. Pascual;D. Busquets;E. Rayon .Tribological study of Fe-Cu-Cr-graphite alloy and cast iron railway brake shoes by pin-on-disc technique[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,2010(5/6):784-789. |
| [5] | Jian Liang Li;Dang Sheng Xiong .Tribological properties of nickel-based self-lubricating composite at elevated temperature and counterface material selection[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,2008(3/4):533-539. |
| [6] | C.M. Fernandes;A.M.R. Senos;M.T. Vieira .Control of eta carbide formation in tungsten carbide powders sputter-coated with (Fe/Ni/Cr)[J].International Journal of Refractory Metals & Hard Materials,2007(4):310-317. |
| [7] | B. Reichel;K. Wagner;D.S. Janisch;W. Lengauer .Alloyed W–(Co,Ni,Fe)–C phases for reaction sintering of hardmetals[J].International Journal of Refractory Metals & Hard Materials,2010(5):638-645. |
| [8] | Jiang X;Liu WJ;Dong SY;Xu BS .High temperature tribology behaviors of brush plated Ni-W-Co/SiC composite coating[J].Surface & Coatings Technology,2005(1):10-15. |
| [9] | Yang Q;Senda T;Hirose A .Sliding wear behavior of WC-12% Co coatings at elevated temperatures[J].Surface & Coatings Technology,2006(14/15):4208-4212. |
| [10] | Jianliang Li;Dangsheng Xiong .Tribological behavior of graphite-containing nickel-based composite as function of temperature, load and counterface[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,2009(1/2):360-367. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%