工艺参数对HVOF喷涂WC-Co涂层磨损性能的影响

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Influence of Spraying Parameter on Wear Performance of High Velocity Oxy-fuel Flame Spraying WC-Co Coats

1. Scientific & Technical Center of Petrochina Pipeline Company, Langfang, 065000, China;
2. China Petroleum Pipeline Coating Engineering Co. Ltd, Langfang, 065000, China;
3. China Petroleum Pipeline Engineering Corporation, Langfang, 065000, China

摘要: 采用滑动磨损试验机对不同工艺参数下HVOF喷涂WC-Co涂层进行滑动磨损试验,并分析了涂层的表面失效行为。氧气流量和燃气流量对涂层磨损性能的影响呈不同的变化规律,较小的氧气流量、适中的燃气流量和喷涂距离条件下制备的涂层磨损率较低。涂层滑动磨损失效具有解理断裂特征。失效过程中碳化物颗粒的剥落对涂层磨损起关键作用,涂层中的粘结相、孔隙对疲劳裂纹的扩展有很大的影响。
- 超音速火焰喷涂 /
- 涂层 /
- 滑动磨损 /
- 耐磨性
Abstract: Sliding wear performances of WC-Co coats was investigated through sliding wear abrasive test.The result shows that spraying parameters such as flow rate of O₂ and combusting gas C₃H₈ has influence on the wear weight loss of the coats.The failure of the coats in the process of sliding wear is characterized by cleavage crack.The peeling carbide particles is a dorminent fator to cause the wear of the coats in the course of failure.Binder phase,oxides and pores in the coats have a great influence on the extension of the crack.
- High velocity oxy-fuel flame spraying /
- Coating /
- Sliding wear /
- Wear resistance