Lubrication Properties of 40Cr Surface Teardrop-shaped and Its Composite Texture

DU Shiyuan; LIN Bingjing; JIANG Zhiyao; ZHAO Zijie

doi:10.16490/j.cnki.issn.1001-3660.2025.21.019

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Surface Technology ›› 2025, Vol. 54 ›› Issue (21) : 263-273. DOI: 10.16490/j.cnki.issn.1001-3660.2025.21.019

Friction, Wear and Lubrication

Lubrication Properties of 40Cr Surface Teardrop-shaped and Its Composite Texture

DU Shiyuan, LIN Bingjing^*, JIANG Zhiyao, ZHAO Zijie

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Abstract

Surface texture is a technology that combines bionics and tribology to improve the tribological properties of parts. This study uses 40Cr as the base material and proposes a symmetrical teardrop-shaped surface micro-texture to systematically explore the regulation mechanism of its geometric parameters (depth, aspect ratio, circumferential density) and composite auxiliary units on tribological behaviors.
First, a unit teardrop-shaped texture fluid domain model is established, and its depth, aspect ratio and circumferential density (unit length) are changed for fluid mechanics simulation. The fluid dynamic pressure performance is analyzed by calculating the oil film pressure and flow field traces in the vertical direction of the upper wall of the model. Afterwards, a picosecond laser is used to prepare a teardrop-shaped surface texture with corresponding geometric parameters on the surface of a treated 40Cr disc sample with a diameter of 32 mm and a depth of 10 mm. A pin-disc friction test was carried out on a 40Cr disc by MVF-2A multifunctional vertical friction and wear testing machine, and the friction coefficient of teardrop-shaped textures with different parameters is obtained through the experiment. The optimal geometric parameters and circumferential density are obtained by combining fluid simulation and friction experiment. After that, the teardrop-shaped texture is combined with V-shaped, arc-shaped and rectangular auxiliary units to obtain a composite teardrop-shaped texture. The lubrication and anti-friction performance is also studied and analyzed.
The geometric parameters of the teardrop-shaped texture have a significant effect on its lubrication and friction reduction performance. The fluid dynamic pressure performance and friction coefficient of the teardrop-shaped texture first increase and then decrease with the increase of depth, and increase with the increase of aspect ratio. In the simulation, the fluid dynamic pressure performance of the teardrop-shaped texture decreases with the increase of circumferential density. When the circumferential density is too large (m=48), the positive and negative pressure zones of the texture and adjacent textures interact, weakening the fluid dynamic pressure performance. In the friction experiment, when the circumferential density is 48, the texture friction coefficient shows unstable fluctuations, which is consistent with the simulation results. Finally, it is concluded that the friction coefficient of the teardrop-shaped texture reaches the minimum value when the depth is 25 μm, the aspect ratio is 3∶1, and the circumferential density is 36, which is 45.5% lower than that of the non-textured surface; the composite teardrop-shaped texture shows poor fluid dynamic pressure performance compared with the single teardrop-shaped texture in the simulation. However, in the friction experiment, the composite texture auxiliary unit provides additional chip storage and oil storage space, and the ZH type and ZV type flow guide structures reduce the friction coefficient by 3.7% and 12.1% respectively compared with the single teardrop-shaped texture, showing better friction reduction performance.
This study confirms that the dynamic pressure and friction reduction performance of the teardrop-shaped texture can be improved by optimizing the geometric parameters. When the combined composite texture has low fluid dynamic pressure performance, the wear debris storage and lubricating oil guiding capabilities are enhanced by optimizing the auxiliary unit geometry, which shows better comprehensive performance than the single drop-shaped texture.

Key words

40Cr / teardrop-shaped / geometric parameters / hydrodynamic effect / coefficient of friction / composite texture

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DU Shiyuan, LIN Bingjing, JIANG Zhiyao, ZHAO Zijie. Lubrication Properties of 40Cr Surface Teardrop-shaped and Its Composite Texture[J]. Surface Technology. 2025, 54(21): 263-273 https://doi.org/10.16490/j.cnki.issn.1001-3660.2025.21.019

References

[1] HOLMBERG K, ANDERSSON P, ERDEMIR A.Global Energy Consumption Due to Friction in Passenger Cars[J]. Tribology International, 2012, 47: 221-234.
[2] 苏永生, 齐国良, 李亮, 等. 齿轮仿生织构特征设计及有限元分析[J]. 润滑与密封, 2021, 46(6): 65-70.
SU Y S, QI G L, LI L, et al.Design of Bionic Texture Features of Gear and Its Finite Element Analysis[J]. Lubrication Engineering, 2021, 46(6): 65-70.
[3] 徐劲力, 余千, 刘伟腾, 等. 基于CFD的齿面微凹坑润滑特性研究[J]. 液压与气动, 2020, 44(3): 76-83.
XU J L, YU Q, LIU W T, et al.Lubrication Characteristics Research Based on CFD for Tooth Surface Micro- Dimple[J]. Chinese Hydraulics & Pneumatics, 2020, 44(3): 76-83.
[4] 何国旗, 邓澍杰, 何瑛, 等. 齿面上不同直径圆形凹坑对面齿轮传动误差的影响分析[J]. 机械设计与研究, 2016, 32(4): 59-63.
HE G Q, DENG S J, HE Y, et al.Analysis on the Influence of Different Diameter Circular Pits on Tooth Surface for the Face-Gear Transmission Error[J]. Machine Design & Research, 2016, 32(4): 59-63.
[5] PETARE A C, MISHRA A, PALANI I A, et al.Study of Laser Texturing Assisted Abrasive Flow Finishing for Enhancing Surface Quality and Microgeometry of Spur Gears[J]. The International Journal of Advanced Manufacturing Technology, 2019, 101(1): 785-799.
[6] 王丽丽, 张伟, 葛雪, 等. 复合微织构排列方式对轴承润滑性能的影响[J]. 中国表面工程, 2023, 36(1): 145-155.
WANG L L, ZHANG W, GE X, et al.Effect of Compound Micro Texture Arrangement on Journal Bearing Lubrication Performance[J]. China Surface Engineering, 2023, 36(1): 145-155.
[7] 赵远方, 杨建玺, 毛亚洲, 等. 织构排列形式对滑动轴承摩擦磨损特性的影响[J]. 轴承, 2020(9): 33-37.
ZHAO Y F, YANG J X, MAO Y Z, et al.Effect of Texture Arrangement on Friction and Wear Characteristics of Sliding Bearings[J]. Bearing, 2020(9): 33-37.
[8] FILGUEIRA FILHO I C M, BOTTENE A C, SILVA E J, et al. Static Behavior of Plain Journal Bearings with Textured Journal-Experimental Analysis[J]. Tribology International, 2021, 159: 106970.
[9] 屠春娟, 郭旭红, 郭大林, 等. 不同形貌微织构自润滑陶瓷刀具切削性能的对比[J]. 机械工程材料, 2018, 42(11): 47-51.
TU C J, GUO X H, GUO D L, et al.Comparison of Machinability of Self-Lubrication Ceramic Tools with Different Morphological Micro-Textures[J]. Materials for Mechanical Engineering, 2018, 42(11): 47-51.
[10] 潘有崇, 曹春宜, 冯洋. 三维微坑织构刀具耐磨损性能研究[J]. 机械设计与制造, 2018(8): 206-208.
PAN Y C, CAO C Y, FENG Y.Study on Wear Resistance of Three-Dimensional Micro-Texture Tool[J]. Machinery Design & Manufacture, 2018(8): 206-208.
[11] WU Z, BAO H, XING Y Q, et al.Tribological Characteristics and Advanced Processing Methods of Textured Surfaces: A Review[J]. The International Journal of Advanced Manufacturing Technology, 2021, 114(5): 1241-1277.
[12] LI K M, YAO Z Q, HU Y X, et al.Friction and Wear Performance of Laser Peen Textured Surface under Starved Lubrication[J]. Tribology International, 2014, 77: 97-105.
[13] LIEM N V, WU Z P, JIAO R Q.Effect of Shape/Size and Distribution of Microgeometries of Textures on Tribo- Performance of Crankpin Bearing[J]. Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 2022, 236(3): 421-433.
[14] HU S, ZHENG L, GUO Q G, et al.Influence of Cross- Grooved Texture Shape on Tribological Performance under Mixed Lubrication[J]. Coatings, 2022, 12(3): 305.
[15] WANG H H, LIN N M, YUAN S, et al.Numerical Simulation on Hydrodynamic Lubrication Performance of Bionic Multi-Scale Composite Textures Inspired by Surface Patterns of Subcrenata and Clam Shells[J]. Tribology International, 2023, 181: 108335.
[16] 汪国庆, 曹鑫鑫, 赵盖, 等. 铜表面纳尺度沟槽织构的摩擦学性能[J]. 表面技术, 2023, 52(3): 134-142.
WANG G Q, CAO X X, ZHAO G, et al.Effect of Groove on the Tribological Properties of Copper from a Nanoscale[J]. Surface Technology, 2023, 52(3): 134-142.
[17] YU H, DENG H, HUANG W, et al.The Effect of Dimple Shapes on Friction of Parallel Surfaces[J]. Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 2011, 225(8): 693-703.
[18] LI P Y, ZHANG F, ZHANG H, et al.Lubrication Performance of Kite-Shaped Microtexture under Hydrodynamic Lubrication[J]. Tribology International, 2023, 179: 108144.
[19] HUA X J, PUOZA J, ZHANG P Y, et al.Experimental Analysis of Grease Friction Properties on Sliding Textured Surfaces[J]. Lubricants, 2017, 5(4): 42.
[20] 周涛涛, 宋晨飞, 钱志源, 等. 铜表面织构密度对铜/碳配副载流摩擦性能的影响[J]. 表面技术, 2024, 53(17): 41-49.
ZHOU T T, SONG C F, QIAN Z Y, et al.Effect of Copper Surface Texture Area Density on Current-Carrying Tribological Properties of Copper/Carbon Pair[J]. Surface Technology, 2024, 53(17): 41-49.
[21] 王鹏洋, 龙威, 赵章行, 等. SiC表面水滴型微织构的水润滑特性研究[J]. 表面技术, 2024, 53(1): 96-104.
WANG P Y, LONG W, ZHAO Z X, et al.Water Lubrication Characteristics of Droplet Texture on SiC Surface[J]. Surface Technology, 2024, 53(1): 96-104.
[22] ZHONG Y H, ZHENG L, GAO Y H, et al.Numerical Simulation and Experimental Investigation of Tribological Performance on Bionic Hexagonal Textured Surface[J]. Tribology International, 2019, 129: 151-161.
[23] YIN H, YANG J G, GU Q L.Numerical Study on the Hydrodynamic Lubrication Performance Improvement of Bio-Inspired Peregrine Falcon Wing-Shaped Microtexture[J]. Tribology International, 2024, 191: 109049.
[24] 郭志远, 崔晓斌, 燕凯. 仿生微坑-槽复合织构陶瓷刀具硬车削性能研究[J]. 工具技术, 2019, 53(1): 25-30.
GUO Z Y, CUI X B, YAN K.Study on Hard Turning Performance of Bionic Micro-Dimple-Groove Composite Textured Ceramic Cutting Tools[J]. Tool Engineering, 2019, 53(1): 25-30.
[25] SEGU D, HWANG P.Friction Control by Multi-Shape Textured Surface under Pin-on-Disc Test[J]. Tribology International, 2015, 91: 111-117.
[26] LU P, WOOD R J K, GEE M G, et al. The Use of Anisotropic Texturing for Control of Directional Friction[J]. Tribology International, 2017, 113: 169-181.