TA15合金表面Ni-SiC复合镀层的摩擦磨损性能

doi:10.15541/jim20150350

摘要/Abstract

摘要：

采用共沉积法在TA15合金表面制备了Ni-SiC复合镀层, 分析了Ni-SiC复合镀层对基体合金硬度和磨擦磨损性能的影响, 并对其摩擦磨损机制进行了讨论。结果表明: 所制备的Ni-SiC复合镀层组织致密且与基体结合紧密, 硬度明显高于TA15合金基体。摩擦磨损实验结果表明, Ni-SiC复合镀层能为TA15合金提供良好的摩擦磨损抗力, 在相同的摩擦条件下, Ni-SiC复合镀层的磨损率明显低于TA15合金。TA15合金与GCr15球和Al₂O₃球对磨的磨损机制均主要为犁削磨损、粘着磨损, 同时伴随有氧化磨损和轻微的磨粒磨损; Ni-SiC复合镀层与GCr15磨球对磨的磨损机制主要为镀层组织的拔出及GCr15钢球在其表面上的涂抹, 与Al₂O₃磨球对磨时的磨损机制主要为疲劳磨损和削层磨损。

关键词: TA15合金, Ni-SiC复合镀层, 摩擦磨损, 磨损机制

Abstract:

Ni-SiC composite coatings were prepared on TA15 alloy by composite electroplating technology. The effects of the coating on friction and wear behavior of the substrate were investigated. The results show that the obtained coating is dense and compact, and possesses higher micro-hardness than the substrate. The coatings have superior friction and wear resistance than the substrate, as the mass losses of the coatings are much lower than those of the substrate under the same sliding conditions. The main wear mechanisms of the substrate sliding against both GCr15 and Al₂O₃ balls can be concluded as plough wear, adhesive wear accompanied by minor oxidation and abrasive wear. The main wear mechanisms of the Ni-SiC composite coating sliding against GCr15 ball can be set as extractions of the coating tissues and swear of the GCr15 ball on the coating surface, while the predoninate wear mechanisms of the coating sliding against Al₂O₃ ball could be fatigue wear and delamination abrasion.

Key words: TA15 alloy, Ni-SiC composite coating, friction and wear, wear mechanisms

中图分类号:

TQ174

郭温, 米国际, 张金龙, 王振亚. TA15合金表面Ni-SiC复合镀层的摩擦磨损性能[J]. 无机材料学报, 2016, 31(2): 195-200.

GUO Wen, MI Guo-Ji, ZHANG Jin-Long, WANG Zhen-Ya. Friction and Wear Behavior of Ni-SiC Composite Coating Prepared on TA15 Alloy[J]. Journal of Inorganic Materials, 2016, 31(2): 195-200.

图/表 7

图1 经30 min共沉积制备的Ni-SiC复合镀层的表面和截面BSE形貌

Fig. 1 Surface and cross-sectional BSE images of Ni-SiC composite coating after electroplating for 30 min (a) Surface morphologies; (b) Cross-sectional morphology

图2 Ni-SiC复合镀层的表面XRD图谱

Fig. 2 XRD pattern conducted on the surface of the Ni-SiC composite coating after electroplating for 30 min

图3 Ni-SiC复合镀层沿截面的硬度分布

Fig. 3 Micro-hardness distribution profile of the Ni-SiC composite coating from its surface to substrate

图4 基体合金和Ni-SiC复合镀层分别与GCr15(a)和Al2O3(b)球对磨时的摩擦系数

Fig. 4 Friction coefficients of the base alloy and the Ni-SiC composite coating sliding against (a) GCr15 ball and (b) Al2O3 ball

图5 摩擦载荷为300 g, 基体合金和Ni-SiC复合镀层分别与GCr15和Al2O3球对磨60 min的磨损失重

Fig. 5 Mass losses of the base alloy and Ni-SiC composite coating after sliding against GCr15 and Al2O3 balls for 60 min, under the load of 300 g

图6 基体合金(a, b)和Ni-SiC复合镀层试样(c, d)在常温下与GCr15球对磨60 min后, 试样磨损面的SEM照片

Fig. 6 Wear morphologies of (a, b) base alloy and (c, d) the Ni-SiC composite coating after sliding against GCr15 ball for 60 min

图7 基体合金(a,b)和Ni-SiC复合镀层试样(c,d)与Al2O3球对磨60 min后, 试样磨损面的SEM照片

Fig. 7 Wear morphologies of (a, b) base alloy and (c, d) Ni-SiC composite coating after sliding against Al2O3 ball for 60 min

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