摘 要
随着现代制造业的发展，模具作为关键工艺装备，其修复技术备受关注。激光熔覆修复技术凭借高精度、低热输入等优势成为模具修复的重要手段，但其工艺稳定性及修复后性能强化的研究仍需深入。本研究旨在探究激光熔覆修复模具的工艺稳定性及性能强化机制，以期为实际应用提供理论依据和技术支持。通过分析激光功率、扫描速度、粉末粒度等因素对熔覆层质量的影响，采用正交实验设计结合响应曲面法优化工艺参数，建立预测模型并验证其准确性。结果表明，在最优工艺参数下，熔覆层与基体结合良好，无明显缺陷，且硬度、耐磨性等力学性能显著提升。创新点在于引入多因素耦合分析方法，揭示各因素交互作用规律，提出基于神经网络的在线监测系统，实现对熔覆过程的实时监控与调控，确保工艺稳定性。该研究不仅丰富了激光熔覆修复理论体系，还为提高模具使用寿命、降低生产成本提供了有效途径，具有重要的学术价值和工程应用前景。
关键词：激光熔覆修复 模具修复 工艺稳定性
Abstract
With the development of modern manufacturing, molds, as critical process equipment, have garnered significant attention regarding their repair technologies. Laser cladding repair technology has emerged as an important method for mold repair due to its advantages of high precision and low heat input; however, further research is needed on the process stability and performance enhancement after repair. This study aims to investigate the process stability and performance enhancement mechanisms of laser cladding repair for molds, providing theoretical basis and technical support for practical applications. By analyzing the effects of factors such as laser power, scanning speed, and powder particle size on the quality of the cladding layer, orthogonal experimental design combined with response surface methodology was employed to optimize process parameters, establish predictive models, and verify their accuracy. The results indicate that under optimal process parameters, the cladding layer exhibits good bonding with the substrate without noticeable defects, and mechanical properties such as hardness and wear resistance are significantly improved. An innovation of this study lies in introducing a multi-factor coupling analysis method to reveal the interaction rules among various factors, proposing a neural network-based online monitoring system to achieve real-time monitoring and control of the cladding process, thereby ensuring process stability. This research not only enriches the theoretical fr amework of laser cladding repair but also provides an effective approach to extending mold service life and reducing production costs, demonstrating significant academic value and engineering application prospects.
Keyword:Laser Cladding Repair Mold Repair Process Stability
目 录
1绪论 1
1.1研究背景与意义 1
1.2国内外研究现状综述 1
1.3本文研究方法与技术路线 2
2激光熔覆工艺参数优化 2
2.1激光功率对熔覆层的影响 2
2.2扫描速度与熔覆质量的关系 3
2.3粉末粒度对工艺稳定性的作用 3
2.4工艺参数的综合优化策略 4
3模具修复后的性能强化 4
3.1熔覆层微观组织分析 4
3.2耐磨性能的提升机制 5
3.3抗腐蚀性能的改善研究 5
3.4力学性能的全面评价 6
4工艺稳定性的控制措施 6
4.1熔覆过程中的热应力分析 6
4.2缺陷形成机理及预防 7
4.3工艺稳定性的在线监测 7
4.4提高工艺稳定性的改进方案 8
结论 9
参考文献 10
致谢 11
随着现代制造业的发展，模具作为关键工艺装备，其修复技术备受关注。激光熔覆修复技术凭借高精度、低热输入等优势成为模具修复的重要手段，但其工艺稳定性及修复后性能强化的研究仍需深入。本研究旨在探究激光熔覆修复模具的工艺稳定性及性能强化机制，以期为实际应用提供理论依据和技术支持。通过分析激光功率、扫描速度、粉末粒度等因素对熔覆层质量的影响，采用正交实验设计结合响应曲面法优化工艺参数，建立预测模型并验证其准确性。结果表明，在最优工艺参数下，熔覆层与基体结合良好，无明显缺陷，且硬度、耐磨性等力学性能显著提升。创新点在于引入多因素耦合分析方法，揭示各因素交互作用规律，提出基于神经网络的在线监测系统，实现对熔覆过程的实时监控与调控，确保工艺稳定性。该研究不仅丰富了激光熔覆修复理论体系，还为提高模具使用寿命、降低生产成本提供了有效途径，具有重要的学术价值和工程应用前景。
关键词：激光熔覆修复 模具修复 工艺稳定性
Abstract
With the development of modern manufacturing, molds, as critical process equipment, have garnered significant attention regarding their repair technologies. Laser cladding repair technology has emerged as an important method for mold repair due to its advantages of high precision and low heat input; however, further research is needed on the process stability and performance enhancement after repair. This study aims to investigate the process stability and performance enhancement mechanisms of laser cladding repair for molds, providing theoretical basis and technical support for practical applications. By analyzing the effects of factors such as laser power, scanning speed, and powder particle size on the quality of the cladding layer, orthogonal experimental design combined with response surface methodology was employed to optimize process parameters, establish predictive models, and verify their accuracy. The results indicate that under optimal process parameters, the cladding layer exhibits good bonding with the substrate without noticeable defects, and mechanical properties such as hardness and wear resistance are significantly improved. An innovation of this study lies in introducing a multi-factor coupling analysis method to reveal the interaction rules among various factors, proposing a neural network-based online monitoring system to achieve real-time monitoring and control of the cladding process, thereby ensuring process stability. This research not only enriches the theoretical fr amework of laser cladding repair but also provides an effective approach to extending mold service life and reducing production costs, demonstrating significant academic value and engineering application prospects.
Keyword:Laser Cladding Repair Mold Repair Process Stability
目 录
1绪论 1
1.1研究背景与意义 1
1.2国内外研究现状综述 1
1.3本文研究方法与技术路线 2
2激光熔覆工艺参数优化 2
2.1激光功率对熔覆层的影响 2
2.2扫描速度与熔覆质量的关系 3
2.3粉末粒度对工艺稳定性的作用 3
2.4工艺参数的综合优化策略 4
3模具修复后的性能强化 4
3.1熔覆层微观组织分析 4
3.2耐磨性能的提升机制 5
3.3抗腐蚀性能的改善研究 5
3.4力学性能的全面评价 6
4工艺稳定性的控制措施 6
4.1熔覆过程中的热应力分析 6
4.2缺陷形成机理及预防 7
4.3工艺稳定性的在线监测 7
4.4提高工艺稳定性的改进方案 8
结论 9
参考文献 10
致谢 11
