首页|激光熔化沉积Al-Mg-Sc-Zr合金晶粒尺寸预测及成形工艺优化

激光熔化沉积Al-Mg-Sc-Zr合金晶粒尺寸预测及成形工艺优化

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通过激光熔化沉积试验分析了工艺条件(送粉速度、扫描速度和激光功率)对Al-Mg-Sc-Zr合金晶粒尺寸的影响,构建了晶粒尺寸预测模型,优化了成形工艺参数,给出了工艺参数最佳区间.结果表明,相较于激光功率和扫描速度,送粉速度对晶粒尺寸的影响最为显著;随着成形能量密度的增加,合金晶粒尺寸呈现出先减小后增大的演变趋势;采用回归方程构建的晶粒尺寸-工艺参数关系模型能准确预测不同工艺条件下激光熔化沉积Al-Mg-Sc-Zr合金的平均晶粒尺寸,相对误差小于 2%;通过响应面分析得到工艺参数最佳区间为:送粉速度2.8～3 g·min-1、激光功率1000～1050 W、扫描速度4～5 mm·s-1.
Grain size prediction and forming process optimization of Al-Mg-Sc-Zr alloy by laser melt deposition
The influence of process conditions(powder feeding speed,scanning speed and laser power)on the grain size of Al-Mg-Sc-Zr alloy was investigated by laser melt deposition.The grain size prediction model was constructed,and the process parameters were opti-mized to determine the optimal range of process parameters.The results show that compared with laser power and scanning speed,powder feeding speed has the most significant impact on grain size.An evolution trend of decreasing followed by increasing of grain size was ob-served with the increase of forming energy density.The process parameters-grain size relationship model constructed by regression equa-tion can accurately predict the average grain size of Al-Mg-Sc-Zr alloy by laser melt deposition under different process conditions,and the relative error is less than 2%.Response surface analysis reveals that the optimum range for process parameters is as follows:powder feed-ing speed of 2.8-3 g·min-1,laser power of 1000-1050 W and scanning speed of 4-5 mm·s-1.

laser melt depositionAl-Mg-Sc-Zr alloygrain sizeprocess optimization

刘筱、谢莉、朱必武、李伟奇、肖罡、李落星、徐从昌

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湖南科技大学 机电工程学院,湖南 湘潭 411201

江西铜业技术研究院有限公司,江西 南昌 330096

湖南大学重庆研究院,重庆 410012

激光熔化沉积 Al-Mg-Sc-Zr合金 晶粒尺寸 工艺优化

国家自然科学基金资助项目国家自然科学基金资助项目湖南省自然科学基金资助项目湖南省自然科学基金资助项目湖南省自然科学基金资助项目江西省自然科学基金资助项目江西省高层次高技能领军人才培养工程项目重庆市自然科学基金资助项目

52075159520711392023JJ302522023JJ302622022JJ3001920224ACB218002CSTB2023NSCQ-MSX0886

2024

10.3969/j.issn.1007-2012.2024.08.011

塑性工程学报
中国机械工程学会

塑性工程学报

CSTPCD北大核心
影响因子：0.46
ISSN：1007-2012
年,卷(期)：2024.31(8)
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