Tribological behaviors of DLC film deposited on female die used in strip drawing
Tribological behaviors of DLC film deposited on female die used in strip drawing
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带材拉拔凹模上沉积的 DLC 薄膜的摩擦学行为
DOI：
10.1016/j.jmatprotec.2012.10.011
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发表时间：
2013-03
影响因子：
6.3
通讯作者：
C.J. Wang, B. Guo, D.B. Shan, X.M. Bai
中科院分区：
文献类型：
--
作者：
C.J. Wang, B. Guo, D.B. Shan, X.M. Bai
随着零件的小型化，采用液体润滑剂时，零件尺寸对微成形过程中的摩擦有明显的影响。为了消除摩擦的尺寸效应，利用类金刚石（DLC）薄膜优良的上级摩擦学特性，在凹模和压边保持器表面沉积DLC薄膜。在不同润滑剂的条件下进行了拉深试验，并利用凸模载荷评价了类金刚石薄膜在凹模表面的摩擦学行为。结果表明，试样尺寸和表面形貌对类金刚石薄膜的摩擦学性能影响较小，而对蓖麻油薄膜的摩擦学性能影响较小。DLC膜在小尺寸、大变形时具有较低的摩擦系数。随着试验次数的增加，DLC膜发生磨损。拉曼光谱分析表明，随着试验次数的增加，D峰和G峰的积分强度之比（ID/IG）逐渐增大，表明DLC膜在摩擦作用下温度升高，发生石墨化。有趣的是，H含量随着测试次数的增加而增加，特别是对于高接触载荷，其通过拟合线性背景的斜率m与G峰强度的比率（m/IG）来评估。H含量的增加意味着摩擦功导致CH键断裂，自由氢原子数增加。石墨化和CH键的断裂对微成形DLC膜的摩擦学性能有明显的影响。
With the miniaturization of parts, dimensions of parts have obvious effects on friction in microforming processes when liquid lubricants are applied. To eliminate size effects of friction, diamond-like carbon (DLC) film was deposited on the surface of female die and blank holder for its superior tribological characteristics. Strip drawing tests were carried out on conditions of different lubricants, and tribological behaviors of DLC film at female die surface were evaluated using punch load. The results reveal that the specimen dimensions and surface topography of specimen have a little effect on tribological behaviors of DLC film than castor oil. DLC film shows lower coefficient of friction (COF) in large deformation and small dimension. With the increasing of test times, wear of DLC film occurs. Raman spectra indicates that the ratio between integrated intensities of D and G peaks (ID/IG) increases with the increasing of tests times, which means that graphitization of DLC film occurs for the rise of temperature induced by the friction at contact surface. The interesting thing is that H content increases with the times of tests especially for high contact load, which is evaluated by the ratio of the slope m of fitted linear background to the intensity of the G peak (m/IG). The increase of H content means that the number of free hydrogen atoms becomes larger for the breakage of CH bonds induced by the friction work. The graphitization and breakage of CH bonds may have an obvious effect on the tribological behaviors of DLC film in microforming.
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影响因子：
5.4
作者：
M. Murakawa;M. Jin;M. Hayashi
通讯作者：
M. Murakawa;M. Jin;M. Hayashi
影响因子：
4.1
作者：
Xinluo Zhao;M. Ohkohchi;S. Inoue;Tomoko Suzuki;Takenori Kadoya;Y. Ando
通讯作者：
Xinluo Zhao;M. Ohkohchi;S. Inoue;Tomoko Suzuki;Takenori Kadoya;Y. Ando
DOI：
10.1115/1.2386207
发表时间：
2007-08-01
影响因子：
4
作者：
Krishnan, Neil;Cao, Jian;Dohda, Kuniaki
通讯作者：
Dohda, Kuniaki
影响因子：
4.1
作者：
X. D. Yang;T. Saito;Y. Nakamura;Y. Kondo;N. Ohtake
通讯作者：
X. D. Yang;T. Saito;Y. Nakamura;Y. Kondo;N. Ohtake
影响因子：
4.1
作者：
Bay, N.;Azushima, A.;Yoshida, M.
通讯作者：
Yoshida, M.