陈基容,张进,王伟,曹晓英,王勤英,袁豪贵.HVOF喷涂CoCrWSi和Stellite-6涂层的结构与高温摩擦学性能研究[J].表面技术,2024,53(19):212-222.
CHEN Jirong,ZHANG Jin,WANG Wei,CAO Xiaoying,WANG Qinying,YUAN Haogui.#$NPMicrostructure and High-temperature Tribological Properties of HVOF Sprayed CoCrWSi and Stellite-6 Coatings[J].Surface Technology,2024,53(19):212-222 |
| HVOF喷涂CoCrWSi和Stellite-6涂层的结构与高温摩擦学性能研究 |
| #$NPMicrostructure and High-temperature Tribological Properties of HVOF Sprayed CoCrWSi and Stellite-6 Coatings |
| 投稿时间：2023-11-20 修订日期：2024-05-08 |
| DOI：10.16490/j.cnki.issn.1001-3660.2024.19.020 |
| 中文关键词: CoCrWSi涂层 超音速火焰喷涂 高温摩擦 Stellite-6涂层 磨损机制 摩擦学性能 |
| 英文关键词:CoCrWSi coating high-velocity oxy-fuel spraying high temperature friction Stellite-6 coating wear mechanism tribological properties |
| 基金项目:长寿命高温材料国家重点实验室开放课题(DTCC28EE200794);四川省科技厅重点研发技术项目(2021YFG0266) |
| 作者 | 单位 |
| 陈基容 | 西南石油大学 新能源与材料学院，成都 610500 |
| 张进 | 西南石油大学 新能源与材料学院，成都 610500 |
| 王伟 | 清洁高效透平动力装备全国重点实验室，四川 德阳 618000;东方电气集团东方汽轮机有限公司，四川 德阳 618000 |
| 曹晓英 | 清洁高效透平动力装备全国重点实验室，四川 德阳 618000;东方电气集团东方汽轮机有限公司，四川 德阳 618000 |
| 王勤英 | 西南石油大学 新能源与材料学院，成都 610500 |
| 袁豪贵 | 西南石油大学 新能源与材料学院，成都 610500 |
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| Author | Institution |
| CHEN Jirong | School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, China |
| ZHANG Jin | School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, China |
| WANG Wei | State Key Laboratory of Clean and Efficient Turbomachinery Power Equipment, Sichuan Deyang 618000, China;Dongfang Electric Corporation Dongfang Turbine Co., Ltd., Sichuan Deyang 618000, China |
| CAO Xiaoying | State Key Laboratory of Clean and Efficient Turbomachinery Power Equipment, Sichuan Deyang 618000, China;Dongfang Electric Corporation Dongfang Turbine Co., Ltd., Sichuan Deyang 618000, China |
| WANG Qinying | School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, China |
| YUAN Haogui | School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, China |
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| 中文摘要: |
| 目的 提高F92耐热钢基体在600、630 ℃下的高温耐磨性能。方法 采用超音速火焰喷涂方法(High velocity oxy-fuel, HVOF)在F92表面制备CoCrWSi、Stellite-6两种涂层，利用扫描电子显微镜(Scanning electron microscope, SEM)和X射线衍射仪(X-ray diffraction, XRD)分析涂层的表面、截面形貌和物相组成，通过显微维氏硬度计(HV-1000STA)、高温摩擦磨损试验机(UMT-TRIBOLAB)、二维轮廓仪(TencorD-100)测定其显微硬度、高温摩擦学性能和磨痕体积。结果 采用超音速火焰喷涂技术制备的CoCrWSi、Stellite-6两种涂层表面较平整，与基体结合紧密，内部组织均匀无裂纹，涂层的厚度约为200 mm。XRD分析表明，CoCrWSi、Stellite-6涂层在室温下的物相都由γ(Co)、Cr7C3、CrSi2组成。硬度及耐磨性能测试显示，CoCrWSi、Stellite-6涂层的维氏硬度相较于F92基体分别提高了3.12、2.68倍，F92耐热钢在600、630 ℃时的平均摩擦因数分别为0.87、0.86，体积磨损率分别为0.49×10−4、1.11×10−4 mm3/(N.m)，其磨损机理主要为疲劳磨损、黏着磨损、氧化磨损。相较于基体，CoCrWSi涂层在2种温度下的平均摩擦因数分别降低了68%、71%，约为0.28、0.25，体积磨损率分别降低了约95%、97%，为0.20×10−5、0.30×10−5 mm3/(N.m)，这主要归功于内部的Cr2O3、γ(Co)、Co3O4相在高温摩擦过程中具有良好的润滑效果。Stellite-6涂层也能在一定程度上改善基体的高温耐磨性能，其平均摩擦因数为0.85、0.71，体积磨损率为0.32×10−4、0.57× 10−4 mm3/(N.m)。2种涂层的主要磨损机理均为磨粒磨损和黏着磨损。结论 采用超音速火焰喷涂制备的CoCrWSi、Stellite-6涂层可以改善F92耐热钢在600、630 ℃下的耐高温滑动磨损性能，且CoCrWSi涂层的防护效果更佳。 |
| 英文摘要: |
| To enhance the high-temperature wear resistance of F92 heat-resistant steel at 600 ℃ and 630 ℃, two kinds of CoCrWSi and Stellite-6 coatings were fabricated via high-velocity oxy-fuel (HVOF) spraying. The surface and cross-sectional characteristics, as well as the phase composition of the coatings, were examined by scanning electron microscopy (SEM) and X-ray diffraction (XRD). Micro-hardness measurements were conducted with a Microvickers hardness tester (HV-1000STA). The tribological properties and volumetric wear rates were evaluated with a high-temperature tribotester (UMT-TRIBOLAB) and a two-dimensional profilometer (TencorD-100), with wear morphology and phase analysis performed by SEM and XRD. The SEM revealed that both coatings were well-adhered to the substrate, with smooth surfaces, uniform internal structures, and no cracks, averaging a thickness of approximately 200 µm. XRD identified the main phases of the coatings as Co, Cr7C3, and CrSi2 at room temperature. The presence of Cr7C3 and CrSi2 phases in both coatings contributed to increasing hardness and wear resistance. The Co phase served as a lubricant, reducing the wear rate during sliding. Hardness and wear resistance tests indicated that the Vickers hardness of the CoCrWSi and Stellite-6 coatings were 3.12 and 2.68 times greater than that of the F92 substrate, respectively. The average friction coefficients for the F92 steel at 600 ℃ and 630 ℃ were 0.87 and 0.86, with corresponding volumetric wear rates of 0.49×10−4 mm3/(N.m) and 1.11×10−4 mm3/(N.m). The primary wear mechanisms for the F92 matrix were identified as fatigue, adhesive, and oxidation wear. Compared with the substrate, the CoCrWSi coating demonstrated a significant reduction in friction coefficients (68% and 71%) at two temperatures, which were about 0.28 and 0.25, respectively. The volumetric wear rates were reduced by about 95% and 97%, which were 0.20×10−5 mm3/(N.m) and 0.30×10−5 mm3/(N.m), at both temperatures, respectively. This was mainly attributed to the lubricating effects of internal Cr2O3, γ(Co), and Co3O4 phases. In contrast, the Stellite-6 coating exhibited a lesser improvement in wear resistance, with average friction coefficients of 0.85 and 0.71, and wear rates of 0.32×10−4 mm3/(N.m) and 0.57×10−4 mm3/(N.m). The Stellite-6 coating suffered from more severe wear, primarily adhesive wear, with substantial abrasive chip accumulation. The CoCrWSi coating showed minimal wear at 600 ℃ AND 630 ℃, with wear mechanisms dominated by abrasion and adhesion. The research findings indicate that HVOF-applied Stellite-6 and CoCrWSi coatings significantly improve the tribological properties of F92 steel at elevated temperatures, with CoCrWSi offering superior protective performance. This work employs high-velocity oxy-fuel spraying technology to deposit CoCrW coatings infused with a minor amount of Si onto the surface of F92 heat-resistant steel. It also conducts a comparative investigation into the tribological behavior of the F92 heat-resistant steel substrate, CoCrWSi, and Stellite-6 coatings under simulated actual working temperatures (600 ℃ and 630 ℃), analyzing the wear mechanisms involved. The objective of the findings is to supply substantiated data to enhance the knowledge base regarding the high-temperature durability of CoCrWSi coatings on F92 steel. |
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