刘晓明,高云鹏,闫侯霞.载荷和温度对 Fe-Al/Cr3C2 复合涂层摩擦磨损性能的影响[J].表面技术,2016,45(11):55-61. LIU Xiao-ming,GAO Yun-peng,YAN Hou-xia.Effects of Load and Temperature on the Frictional Wear Resistance of Fe-Al/Cr3C2 Composite Coating[J].Surface Technology,2016,45(11):55-61 |
载荷和温度对 Fe-Al/Cr3C2 复合涂层摩擦磨损性能的影响 |
Effects of Load and Temperature on the Frictional Wear Resistance of Fe-Al/Cr3C2 Composite Coating |
投稿时间:2016-04-06 修订日期:2016-11-20 |
DOI:10.16490/j.cnki.issn.1001-3660.2016.11.008 |
中文关键词: Fe-Al/Cr3C2 复合涂层 载荷 温度 摩擦磨损 |
英文关键词:Fe-Al/Cr3C2 composite coating load temperature frictional wear |
基金项目:内蒙古电力(集团)有限责任公司 2014 年第 1 批科技项目(201401032) |
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中文摘要: |
目的 研究不同载荷、不同温度下 Fe-Al/Cr3C2 复合涂层的摩擦磨损特性,为不同工况条件下应用该涂层实施抗摩擦磨损治理提供理论依据。 方法 采用 THT07-135 高温摩擦磨损试验机对Fe-Al/Cr3C2复合涂层的摩擦磨损特性进行测试,载荷分别选用 3、 5、 7 N,温度选择 25、 300、 450、550、 600 ℃ ,利用配有 EDAX 能谱仪的扫描电镜观察涂层磨痕表面形貌并进行元素分析,利用透射电镜对涂层的精细结构进行分析。 结果 同一温度下,涂层的摩擦因数随着载荷的增加而降低,磨损量随着载荷的增加而升高,载荷对磨损量的影响随温度的增加逐渐降低。载荷一定时,涂层的摩擦因数先增加后逐渐降低, 450 ℃ 时涂层的摩擦因数最高;涂层的磨损量整体呈下降的趋势, 450 ℃ 时涂层的磨损量最大。温度较低时,涂层磨损主要以脆性断裂的剥层磨损为主;温度升高至 450 ℃ ,涂层磨损主要是脆性断裂、塑性变形以及少量粘着磨损; 550 ℃ 以上时,涂层磨损主要是粘着磨损、塑性变形磨损。结论 Fe-Al/Cr3C2复合涂层具有较好的抗高温摩擦磨损性能, 氧化物的增加以及铁铝金属间化合物高温时, B3 相与 D03相之间的转变提高了涂层的抗高温摩擦磨损性能。 |
英文摘要: |
The work aims to study frictional wear resistance of Fe-Al/Cr3C2 composite coating under different load and temperature in order to provide theoretical basis for resolving frictional wear problems by using Fe-Al/Cr3C2 composite coating under different operation conditions. The frictional wear resistance of Fe-Al/Cr3C2 composite coating was tested by using THT07-135 high-temperature friction-abrasion testing machine at 3 N, 5 N, 7 N load and room temperature (25 ), 300 , 450 , 550 , 600 respectively. Wear scar images and composite ℃ ℃ ℃ in different regions were analyzed by SEM with EDAX. Microstructures were analyzed by TEM. Friction coefficient of coating decreased and wear loss of the coating increased as the load increased. Effects of the load to wear loss reduced gradually as the temperature increased. Under the same load, friction coefficient of the coating first increased and then decreased. Friction coefficient was the maximum at 450 . Overall, wear l ℃ oss of the coating showed a downtrend and was the minimum at 450 ℃ . At lower temperature, the main wear mechanism was delamination wear caused by brittle fracture. When the temperature was up to 450 , the main mechanisms were brittle fracture, ℃ plastic deformation and little adhesive wear. When the temperature was higher than 550 , the main mechanisms were adh ℃ esive wear and plastic deformation. The Fe-Al/Cr3C2 composite coating has better high-temperature frictional wear resistance. Transformation between B3 phase and D03 phase improves the high-temperature frictional wear resistance of the coating as the oxides increase and substrate Fe-Al intermetallics is at high temperature. |
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