基于 STFT 的织构涂层硬质合金表面振动解析方法
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TH140. 7 TH117

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国家自然科学基金(52005140)项目资助


STFT-based surface vibration analysis method for textured coated cemented carbide
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    摘要:

    针对织构涂层复合工艺对硬质合金表面改性时存在消极振动的问题,提出一种基于织构涂层表面摩擦振动行为的解析 方法来探索织构涂层复合工艺改性效果。 因此,搭建了微织构 AlSiTiN 涂层硬质合金-钛合金磨盘摩擦磨损试验平台,基于短 时傅里叶变换(STFT)与灰度算法对摩擦振动变化规律性映射和振动行为平稳时段进行了获取,进而分析了微织构 AlSiTiN 涂 层工艺参数对硬质合金的改性效果。 试验研究得出了微织构及 AlSiTiN 涂层对硬质合金表面耐磨改性效果最为积极的时间 段,即自接触摩擦起第 5~ 25 min 的稳定作用时期,得出微织构及 AlSiTiN 涂层参数对硬质合金表面改性的影响机理,优选该复 合改性方法抑制硬质合金表面消极摩擦振动的工艺参数,为提升硬质合金表面性能研究提供新思路。

    Abstract:

    To address the problem of negative vibration in the surface modification of cemented carbide by textured coating composite process, an analytical method based on the friction vibration behavior of textured coating surface is proposed to explore the modification effect of textured coating composite process. Therefore, the friction and wear test platform of micro textured AlSiTiN coated cemented carbide-titanium alloy grinding disc is established. Based on the short-time Fourier transform (STFT) and the gray algorithm, the regular mapping of friction vibration change and the stable period of vibration behavior are obtained. Then, the modification effect of microtexture AlSiTiN coating process parameters on cemented carbide is analyzed. Experimental results show that the micro texture and AlSiTiN coating have the most positive effect on the wear resistance of cemented carbide surface. During the stable period of 5~ 25 min from self-contact friction, the influence mechanism of micro-texture and AlSiTiN coating parameters on the surface modification of cemented carbide is obtained. The process parameters of the composite modification method to suppress the negative friction vibration of the cemented carbide surface provide a new idea for improving the surface performance of cemented carbide.

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佟 欣,王守猛.基于 STFT 的织构涂层硬质合金表面振动解析方法[J].仪器仪表学报,2023,44(4):284-295

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  • 在线发布日期: 2023-07-12
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