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| 激光熔覆中工艺参数对形成层几何特征及硬度的影响分析 |
| Effect analysis of process parameters on forming layer’s geometric characteristics and micro hardness in laser cladding |
| 投稿时间：2016-08-19 修订日期：2016-09-30 |
| DOI： |
| 中文关键词: 316L不锈钢 激光熔覆 工艺参数 几何特征 正交试验设计 |
| 英文关键词: 316L Stainless Steel Laser Cladding Process Parameters Geometric Characteristic Orthogonal Experimental Design |
| 基金项目:国家重点基础研究发展计划（973计划）;国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 中文摘要: |
| 激光熔覆技术的实质是合金粉末快速熔化和凝固的过程,其形成层的几何特征和硬度与工艺参数密切相关。为了满足形成层的性能要求与激光熔覆的工艺规划,必须了解工艺参数对激光熔覆形成层几何特征及硬度的影响规律。本文根据正交试验设计方法设计了研究工艺参数(激光功率、扫描速率、送粉速率)对单道单层熔覆层几何形状特征(熔覆层高度、宽度与熔池深度)与硬度影响的试验,根据试验结果归纳了工艺参数对单道单层熔覆层几何特征与硬度的影响规律,并解释了造成这些影响的原因。此外，使用了一个激光熔覆的几何特征模型对照验证了试验结果。 |
| 英文摘要: |
| Laser cladding is the process that alloy powders get melted and solidified rapidly. The shape and properties of forming layer are closely related to processing parameters. It’s necessary to do the effect analysis of laser cladding process parameters on forming layer’s shape and properties. This thesis designed an orthogonal experiment to explore the effect of laser power, scanning speed and powder feed rate on forming layer’s geometric characteristics, including the height and weight of the cladding layer, the depth of the melting pool and the micro hardness. The effect rules of those process parameters on forming layer’s geometric characteristic and hardness were concluded and rules’ underlying reasons were explained. A geometric model of laser cladding was used to validate the results of experiments. |
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