滕达,高珊,刘运峰,周秉文,张兴国.B4C-60Ni添加量对WC-B4C-Ni复合涂层耐磨性能的影响[J].表面技术,2025,54(1):110-119.
TENG Da,GAO Shan,LIU Yunfeng,ZHOU Bingwen,ZHANG Xingguo.Effect of B4C-60Ni Addition on the Wear Resistance of WC-B4C-Ni Composite Coating[J].Surface Technology,2025,54(1):110-119 |
| B4C-60Ni添加量对WC-B4C-Ni复合涂层耐磨性能的影响 |
| Effect of B4C-60Ni Addition on the Wear Resistance of WC-B4C-Ni Composite Coating |
| 投稿时间：2024-01-22 修订日期：2024-04-16 |
| DOI：10.16490/j.cnki.issn.1001-3660.2025.01.010 |
| 中文关键词: HVAF 钛合金 B4C-60Ni WC10Co4Cr涂层 磨损 磨损机制 |
| 英文关键词:HVAF titanium alloy B4C-60Ni WC10Co4Cr coating wear wear mechanism |
| 基金项目:国家重点研发计划(2018YFA0702900) |
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| Author | Institution |
| TENG Da | School of Materials Science and Engineering, Dalian University of Technology, Liaoning Dalian 116024, China |
| GAO Shan | School of Materials Science and Engineering, Dalian University of Technology, Liaoning Dalian 116024, China |
| LIU Yunfeng | Ningbo Institute of Dalian University of Technology, Zhejiang Ningbo 315016, China |
| ZHOU Bingwen | School of Materials Science and Engineering, Dalian University of Technology, Liaoning Dalian 116024, China;Ningbo Institute of Dalian University of Technology, Zhejiang Ningbo 315016, China |
| ZHANG Xingguo | School of Materials Science and Engineering, Dalian University of Technology, Liaoning Dalian 116024, China;Ningbo Institute of Dalian University of Technology, Zhejiang Ningbo 315016, China |
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| 中文摘要: |
| 目的 改善TC4钛合金表面的耐磨性能，延长其使用寿命。方法 通过超音速火焰喷涂(HVAF)技术在TC4钛合金上制备含不同质量分数B4C-60Ni的WC10Co4Cr-B4C-60Ni复合涂层，通过X射线衍射仪(XRD)、扫描电子显微镜(SEM)、能谱仪(EDS)、维氏硬度测试和摩擦磨损实验，分析B4C-60Ni含量对复合涂层的相组成、微观形貌、元素分布、显微硬度、耐磨性能的影响，以及复合涂层的磨损机制。结果 复合涂层的相组成相似，B4C-60Ni的添加使得复合涂层组织更加致密，涂层孔隙率小于1%;涂层硬度随着B4C-60Ni质量分数的增加而降低，其中B4C-60Ni的质量分数为10%的复合涂层具有最高的显微硬度(1 228HV0.3)，约为基体的4倍;涂层的摩擦因数均低于0.5，且涂层的磨痕深度小于15 μm，磨损量随着B4C-60Ni质量分数的增加而增大。其中，WC10Co4Cr-10B4C-60Ni涂层的耐磨性最好，其体积磨损率仅为4.588×10–7 mm3/(N.m)，相较于TC4基体(3.059×10–4 mm3/(N.m))降低了3个数量级。结论 适量添加B4C-60Ni可提高涂层的致密度，B4C-60Ni能够与金属黏结相相互支撑和填充，形成相互间钩爪式的锁定结构，涂层表现出优异的耐磨性。但是添加过量的B4C-60Ni会导致WC分解，摩擦性能下降。 |
| 英文摘要: |
| Hard wear-resistant coatings can enhance the wear resistance of TC4 titanium alloy surface and prolong its service life. In this study, the 100 mm×100 mm×6 mm TC4 titanium alloy plate was selected as the substrate, and the WC10Co4Cr powder was mixed with different mass fractions (10%, 20%, 30%, 40%) of B4C-60Ni powder for spraying. WC10Co4Cr-B4C- 60Ni composite coatings with varying mass fractions of B4C-60Ni were prepared on the TC4 titanium alloy by high velocity air fuel (HVAF) technology. XRD was employed to analyze the phase of the coatings. Morphological analysis was conducted by SEM and EDS to explore the element distribution and wear morphology of the coating. The hardness distribution of the coating was analyzed with a Vickers-1000A hardness tester. Friction and wear experiments were conducted to analyze the wear resistance and wear mechanism of the composite coating. According to the results, similarities were observed in the phase of the composite coating, mainly including WC, B4C, Co3W3C, W2CoB2, Ni4B3, and Al3Ni phases. The WC and B4C hard phases were dispersed in metal bonding phases such as Co, Cr, and Ni, forming a multiphase structure. The coating thickness was distributed between 330 μm and 360 μm. At the interface, a strong bonding was observed between the coating and substrate, while the addition of B4C-60Ni made the interior of the composite coating denser without obvious pores. The coating displayed overall porosity of less than 1%, and the surface roughness was less than 3 μm. The coating had good flatness and high density. Compared to the TC4 substrate, the coating had a higher microhardness, which was evenly distributed in the thickness direction of the coating. Among them, the composite coating with a B4C-60Ni mass fraction of 10% had the highest microhardness of 1 228HV0.3, which was approximately four times that of TC4. With the increase of B4C-60Ni, the proportion of hard phase decreased relatively, leading to a decrease in the coating hardness. High hardness ensured good wear resistance. Under dry friction conditions at room temperature, the average friction coefficient of the coating in the stable stage was less than 0.5, and the wear mark depth of the coating was less than 15 μm, far less than the wear depth of the substrate (203 μm). The width of the wear marks on the coating was less than one-third of that on the substrate. The wear amount of the coating increased with the increase of B4C-60Ni mass fraction. Among these, the WC10Co4Cr-10B4C-60Ni coating demonstrated the greatest wear resistance with a volume wear rate of only 4.588×10–7 mm3/(N.m), which was four orders of magnitude lower than that of the bare TC4 substrate (3.059×10–4 mm3/(N.m)). The primary wear mechanisms observed in the coating are adhesive wear and fatigue wear. This observation indicates that the inclusion of an appropriate quantity of B4C-60Ni improves the densification of the coating, support and fill with the metal bonding phase, forming a hook claw locking structure between each other, thereby exhibiting excellent wear resistance. However, excessive addition of B4C-60Ni can lead to the decomposition of WC, resulting in a decrease in friction performance. |
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