李旭强,李文生,翟海民,汤鹏君.低温热循环处理Fe基非晶粉末对爆炸喷涂涂层摩擦学性能的影响[J].表面技术,2020,49(2):151-157.
LI Xu-qiang,LI Wen-sheng,ZHAI Hai-min,TANG Peng-jun.Effect of Cryogenic Thermal Cycling Treatment of Fe-based Amorphous Powder on Tribological Properties of Detonation Gun Sprayed Coatings[J].Surface Technology,2020,49(2):151-157 |
| 低温热循环处理Fe基非晶粉末对爆炸喷涂涂层摩擦学性能的影响 |
| Effect of Cryogenic Thermal Cycling Treatment of Fe-based Amorphous Powder on Tribological Properties of Detonation Gun Sprayed Coatings |
| 投稿时间：2019-08-16 修订日期：2020-02-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2020.02.018 |
| 中文关键词: 涂层 Fe基非晶 低温热循环 爆炸喷涂 摩擦 |
| 英文关键词:coating Fe-based amorphous cryogenic thermal cycling detonation spraying wear |
| 基金项目:国家自然科学基金（51674130）；国家重点研发计划国际科技合作项目（2016YFE0111400）；甘肃省国际科技合作特派员计划（17JR7WA017）；甘肃省重点研发计划项目（17YF1WA159） |
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| Author | Institution |
| LI Xu-qiang | State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China |
| LI Wen-sheng | State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China |
| ZHAI Hai-min | State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China |
| TANG Peng-jun | State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China |
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| 中文摘要: |
| 目的 提高爆炸喷涂Fe基非晶涂层的摩擦学性能。方法 采用液氮-室温循环处理喷涂粉末，通过爆炸喷涂制备原始粉末和处理粉末对应涂层。利用X射线衍射仪（XRD）检测涂层非晶相，用维氏显微硬度计和球-盘式摩擦试验机分别测试涂层的显微硬度和摩擦学性能，用附带能谱仪的扫描电子显微镜（SEM）表征样品的组织形貌及特征区域的元素含量。结果 粉末经低温热循环处理后，仍为非晶态组织，且未发生开裂和破碎现象。与原始粉末制备的涂层相比，低温热循环处理粉末制备的涂层孔隙率由1.0%降低至0.4%；未熔颗粒明显减少，粉末铺展更加充分；显微硬度略有降低（由845.4HV降至813.5HV），但测试误差明显减小，威布尔分布拟合直线斜率由7.1196升高至9.6414；摩擦系数由0.76降低至0.73，磨损更加稳定；磨损率相近，均在10-6次方数量级。结论 Fe基非晶粉末经低温热循环处理后，其对应涂层的组织更为均匀致密，显微硬度分布更为均匀，摩擦磨损性能更为稳定，磨损机制由原始粉末制备涂层的疲劳剥层磨损，转变为以氧化磨损和塑性变形主导。 |
| 英文摘要: |
| The work aims to improve the tribological properties of Fe-based amorphous coatings sprayed by detonation gun. Powder-original and powder-treated (liquid nitrogen-room temperature cycling) Fe-based amorphous coatings were deposited by detonation spraying successfully. The amorphous phases of the two coatings were measured by X-ray diffractometer (XRD). The hardness and tribological properties of the two coatings were tested by Vickers hardness tester and ball-disk friction tester, respectively. The morphology and element content in the characteristic region of the samples were characterized by scanning electron microscopy with energy dispersive spectrometer (SEM). The result shows that the powder was still in amorphous structure after cryogenic thermal cycling treatment, and no cracking and breakage occurred. Compared with the powder-original coating, the porosity of the powder-treated coating decreased from 1.0% to 0.4%. The unmelted particles decreased obviously, and the powder spreading was more sufficient. The microhardness decreased slightly from 845.4HV to 813.5HV, but the test error significantly reduced. The slope of Weibull distribution fitting line increased obviously from 7.1196 to 9.6414. The friction coefficient decreased from 0.76 to 0.73 and became more stable. The wear rate was similar, on the order of 10-6 power. Therefore, the microstructure of Fe-based powder-treated amorphous coating is more uniform and compact after cryogenic thermal cycling, the microhardness distribution is more uniform, the friction and wear properties are more stable, and the wear mechanism changes from fatigue delamination wear of the powder-original coating to dominant oxidative wear and plastic deformation. |
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