表面技术2025，Vol.54Issue(13)：43-50,8.DOI:10.16490/j.cnki.issn.1001-3660.2025.13.004
42CrMo合金钢织构表面复合固体润滑剂摩擦学性能研究
Tribological Properties of Composite Solid Lubricants for 42CrMo Alloy Steel Texture Surface
摘要
Abstract
42CrMo,widely utilized in gears,bearings,connecting rods,and other automotive components,demonstrates significant potential for enhancing wear resistance and friction reduction performance.The work aims to introduce a composite surface modification technique combining laser processing surface weaving technology with solid lubricants to improve friction reduction and wear resistance without altering the base material. Rectangular blocks of 40 mm×40 mm×8 mm were cut from 42CrMo and polished with the sandpaper of varying grits before being cleaned in an ultrasonic cleaner.Laser weaving technology was employed to create triangular structures with surface densities of 16%,26%,and 36%on the specimen surfaces.A viscous composite lubricant,prepared by mixing MoS2 and epoxy resin E-51 at a 1∶2 volume ratio,was applied with a dust-free cloth and uniformly filled into the microstructures.Excess lubricant was removed by grinding and polishing with the sandpaper,and the blocks were subsequently heated and fixed to prepare friction wear specimens.The composite surface morphology was examined with a metallurgical microscope.Friction and wear experiments were conducted on an MRTR-1 multifunctional tester under dry friction conditions for 20 minutes,with data acquisition at 0.1-second intervals,a load of 20 N,and a rotational speed of 200 r/min.SEM and EDS analyses were performed to examine wear marks and elemental compositions,while stress simulation was used to investigate equivalent stress magnitudes and distributions for different weave densities and friction-wear patterns. Compared to textured surfaces,composite surfaces with varying texture densities exhibited differing levels of friction reduction.The composite surface with a texture density of 16%demonstrated the most effective friction reduction,achieving a friction coefficient of approximately 0.19 and a friction reduction rate of 77.65%.The friction coefficient increased with fabric density.The peak equivalent stress for the 16%density surface was 3.553 8 MPa,showing an initial increase followed by a decrease as fabric density continued to rise. Processing surface microstructures and incorporating MoS2 nanoparticles significantly enhance the tribological properties of 42CrMo alloy steel.Both the microstructures and the MoS2 nanoparticles contribute to a synergistic lubrication effect.The nanoparticles form a solid lubrication film on the friction surface,while the microstructures capture abrasive debris and store lubricants to replenish the lubrication film when it breaks.This mechanism effectively reduces friction and wear.Additionally,the stored lubricant supplements the broken lubrication film,achieving the dual goals of friction reduction and wear resistance.关键词
42CrMo合金钢/激光织构技术/复合润滑结构/MoS2/织构密度/摩擦学性能Key words
42CrMo alloy steel/laser texture technology/composite lubrication structure/MoS2/texture density/tribological property分类
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欧阳瑞,陈文刚,王海军,Dongyang Li,王文,王永康..42CrMo合金钢织构表面复合固体润滑剂摩擦学性能研究[J].表面技术,2025,54(13):43-50,8.基金项目
云南省教育厅面上项目(2022J0499) （2022J0499）
云南省Dongyang Li院士工作站(202305AF150019) （202305AF150019）
国家自然科学基金(51865053)Yunnan Provincial Department of Education General Project(2022J0499) （51865053）
Academician Dongyang Li Workstation of Yunnan Province(202305AF150019) （202305AF150019）
National Natural Science Foundation of China(51865053) （51865053）
