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《电镀与精饰》[ISSN:1001-3849/CN:12-1096/TG]

卷:

期数:

2026年06

页码:

79-88

栏目:

出版日期:

2026-06-30

文章信息/Info

Title:

Construction of anti-friction and wear-resistant composite film layers on titanium alloy surfaces and its mechanism for enhancing bonding strength

作者:

王建邦

(廊坊职业技术学院 汽车工程系,河北 廊坊 06500 1)

Author(s):

WANG Jianbang

(Department of Automotive Engineering, Langfang Polytechnic Institute, Langfang 06500 1, China)

关键词:

钛合金; 复合膜层; 减摩耐磨; 汽车部件

Keywords:

titanium alloy;  composite film;  antifriction and wear resistance;  automobile components

分类号:

TQ150 TG174.4

文献标志码:

A

摘要:

为增强钛合金耐磨性及结合强度，研究将微弧氧化(MAO)与复合电镀技术联用。经打磨、清洗、酸碱活化预处理的Ti-6Al-4?V合金基体，在硅酸盐电解液中微弧氧化形成多孔粗糙底层。然后以该底层为阴极，在含不同SiC含量镀液中复合电镀，通过调控电流密度与SiC含量，制备出MAO-Ni-SiC复合膜层，并设置无Ni中间层的MAO-SiC对照组，系统探究各因素对膜层性能的影响。结果表明，随着电流密度增大，Ni相结晶度和沉积量增加，SiC嵌入量提升，当电流密度为10 A?dm–2时，SiC相对含量达40%；SiC含量增至20 g/L时，其相对含量达50%，但Ni相含量因沉积受阻略有下降。在摩擦性能方面，6 A?dm–2电流密度和15 g/L SiC含量时综合表现最优，5 N载荷下平均摩擦系数低至0.39，20 N载荷下磨损率较对照组降低40%～56%。结合强度测试显示，10 A?dm–2时临界载荷Lc2达23.5 N，较最低电流密度组提升85%，且SiC含量15 g/L时划格评级为1级(无脱落)。最优工艺参数为电流密度6 A?dm–2、SiC含量15 g/L，此时膜层致密性与颗粒嵌入量平衡，减摩耐磨性能与结合强度最佳。结合强度增强机制中，MAO底层多孔结构机械锚固贡献40%，Ni基质的机械锚固、冶金结合及内聚强度贡献合计70%，SiC颗粒嵌入贡献35%，三者协同强化界面与内部结构。研究所得的复合膜层通过多相协同显著提升钛合金的减摩耐磨性能与界面结合强度，有助于延长汽车零部件服役寿命。

Abstract:

To enhance the wear resistance and bonding strength of titanium alloys, the combination of Micro-arc oxidation (MAO) and composite electroplating technology was studied. The Ti-6Al-4?V alloy matrix, which has undergone pretreatment such as grinding, cleaning and acid-base activation, is subjected to micro-arc oxidation in silicate electrolyte to form a porous and rough bottom layer. Then, using this bottom layer as the cathode, composite electroplating was carried out in plating solutions with different SiC contents. By regulating the current density and SiC content, MAO-Ni- SiC composite film layers were prepared, and a MAO- SiC control group without a Ni intermediate layer was set up to systematically explore the influence of various factors on the performance of the film layers. The results show that with the increase of current density, the crystallinity and deposition amount of the Ni phase increase, and the SiC embedding amount increases. When the current density is 10 A?dm–2, the relative content of SiC reaches 40%. When the content of SiC increased to 20 g/L, its relative content reached 50%, but the content of the Ni phase slightly decreased due to deposition obstruction. In terms of friction performance, the comprehensive performance is the best at A current density of 6 A?dm–2 and a SiC content of 15 g/L. The average friction coefficient is as low as 0.39 under a 5 N load, and the wear rate under a 20 N load is 40% to 56% lower than that of the control group. The combined strength test shows that at 10 A?dm–2, the critical load Lc2 reaches 23.5 N, which is 85% higher than that of the lowest current density group, and when the SiC content is 15 g/L, the division rating is grade 1 (no detachment). The optimal process parameters are A current density of 6 A?dm–2 and a SiC content of 15 g/L. At this time, the film layer density is balanced with the particle embedding amount, and the anti-friction, wear resistance performance and bonding strength are the best. In the mechanism of enhancing bonding strength, the mechanical anchoring of the porous structure at the bottom layer of MAO contributes 40%, the mechanical anchoring, metallurgical bonding and cohesive strength of the Ni matrix contribute a combined 70%, and the embedding of SiC particles contributes 35%. The three work together to strengthen the interface and internal structure. The composite film layer constructed by the research institute significantly enhances the anti-friction, wear-resistant performance and interfacial bonding strength of titanium alloys through multiphase synergy, which is conducive to extending the service life of automotive parts.

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更新日期/Last Update: 2026-06-12