Ti6Al4V激光选区熔化成形悬垂结构的质量研究

摘要/Abstract

摘要： 为了减小成形误差，提高激光选区熔化成形复杂特征结构件的能力，实验采用Ti6Al4V金属粉末，设计了不同倾斜角度的悬垂结构模型，研究了倾斜角度、扫描策略对悬垂结构SLM成形质量的影响。结果表明：倾斜角度越小，悬垂面的边缘线宽度误差越大（>80μm），表面粗糙度值越大（>20μm），翘曲变形越严重；岛形随机扫描策略的整体成形质量要低于Z形正交扫描策略，但对不同角度的悬垂结构影响不同。结合QM-Meltpool监控系统，从熔池的角度分析了倾斜角度和扫描策略的影响，为悬垂结构SLM成形提供了参考依据。

关键词: Ti6Al4V金属粉末, 激光选区熔化, 悬垂结构, 成形质量

Abstract: In order to reduce forming errors and improve the ability of forming complex structures by SLM, the impacts of inclinable angle, scanning strategy and supporting structure for forming quality of overhanging structure by SLM were studied herein, where the Ti6Al4V metal powder was used and an overhanging structural model with different angles was designed. Results show that the smaller the inclinable angle, the bigger the width errors of draping the edge lines (>80μm) and surface roughness (>20μm), and the more serious of warp and deformation; the overall forming quality of random scanning strategy within island-type is poorer than that of orthogonal scanning strategy within Z-type, but the influences on different overhanging structures are not the same. A reference was provided for SLM forming overhang feature structures, combining the QM-Meltpool monitoring system, and the impact analyses of inclinable angle and scanning strategy were completed based on the perspective of meltpool.

Key words: Ti6Al4V metal powder, selective laser melting(SLM), overhanging structure, forming quality

中图分类号:

TN201

吴根丽, 刘婷婷, 张长东, 廖文和. Ti6Al4V激光选区熔化成形悬垂结构的质量研究[J]. 中国机械工程.

Wu Genli, Liu Tingting, Zhang Changdong, Liao Wenhe. Research on Forming Quality of Overhanging Structure by Selective Laser Melting[J]. China Mechanical Engineering.

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