基于遗传算法的钛合金SLM多目标优化  

Multi-Objective Optimization of Titanium Alloy SLM Based on Genetic Algorithm

作　　者：张鑫何 白海清[1,2] 杨思瑞 李超凡 贾宗强 Zhang Xinhe;Bai Haiqing;Yang Sirui;Li Chaofan;Jia Zongqiang(College of Mechanical Engineering,Shaanzi University of Technology,Hanzhong 72300l,Shaanxi,China;Shaanri Key Laboratory of Industrial Automation,Hanzhong 723001,Shaanzi,China)

机构地区：[1]陕西理工大学机械工程学院,陕西汉中723001 [2]陕西省工业自动化重点实验室,陕西汉中723001

出　　处：《应用激光》2023年第9期23-31,共9页Applied Laser

摘　　要：为了探究TC4钛合金选区激光熔化成形的最优工艺参数,以致密度与显微硬度为评价指标,分析了扫描速度、激光功率与扫描间距等工艺参数对其影响程度和规律。通过正交试验、极差分析和遗传算法对工艺参数进行了优化,结果表明,对致密度和显微硬度的影响,激光功率最大、扫描间距次之、扫描速度最小。当扫描速度处于980~1 024 mm/s,激光功率205 W,扫描间距0.05 mm时,所得TC4钛合金成形件致密度可达约95%,维氏显微硬度可达约420 HV,大于传统锻造件硬度。In order to explore the optimal process parameters of selective laser melting forming of TC4 titanium alloy,the effects of scanning speed,laser power,and scanning distance on the process parameters were analyzed with the densification degree and microhardness as evaluation indexes.The process parameters were optimized by orthogonal test,range analysis,and genetic algorithm.The results showed that the influence of laser power,scanning distance,and scanning speed on density and microhardness is the largest.At the same time,when the scanning speed is in the range of 9801024 mm/s,laser power is 205 W,and scanning distance is 0.05 mm,the density of TC4 titanium alloy forming parts can reach 95%and Vickers microhardness can reach 42o HV,which is higher than the hardness of traditional forging parts.

关 键 词：选区激光熔化 TC4钛合金 致密度 显微硬度 遗传算法 参数优化 

分 类 号：TG146[一般工业技术—材料科学与工程]