基于响应面法的镍基高温合金GH4169电弧增材工艺优化  

Optimization of Arc Additive Process for Nickel-based Superalloy GH4169 Based on Response Surface Methodology

作　　者：郭志永 李猛 张志强 路学成 张天刚 曹轶然 GUO Zhiyong;LI Meng;ZHANG Zhiqiang;LU Xuecheng;ZHANG Tiangang;CAO Yiran(School of Aeronautical Engineering,Civil Aviation University of China,Tianjin 300300,China)

机构地区：[1]中国民航大学航空工程学院,天津300300

出　　处：《材料导报》2024年第19期205-211,共7页Materials Reports

基　　金：天津市自然科学基金(22JCYBJC01280);中央高校基本科研业务费自然科学重点项目(3122023039);国家自然科学基金(51905536);航空科学基金(2020Z049067002)。

摘　　要：本工作以CMT-P复合电弧增材制造镍基合金GH4169为研究对象,综合考虑送丝速度、焊接速度和脉冲数量等工艺参数,以变形量和成形精度等成形质量为评价指标,采用中心复合响应面法进行工艺参数优化。建立变形量与成形精度的回归模型,分析工艺参数对成形质量的单体与交互效应。研究表明:对变形量影响最显著的因素是送丝速度,脉冲数量次之,焊接速度的影响最小。脉冲数量对成形精度的影响明显大于送丝速度和焊接速度,并且送丝速度和脉冲数量对其具有显著的交互作用;基于综合优化目标,获得了最优参数组合:送丝速度3.5 m/min、焊接速度5.8 mm/s、脉冲数量30;对比成形质量的模型预测与试验结果,变形量与成形精度的误差分别为10.3%和4%,验证了所建立成形质量模型的正确性。In this work,the CMT-P composite arc additive manufacturing nickel base alloy GH4169 was studied.The process parameters such as wire feeding speed,welding speed and pulse number were considered comprehensively,and the forming quality such as distortion and forming accuracy was taken as the evaluation index.The process parameters were optimized by using the central composite response surface method.The regression model of distortion and forming accuracy was established,and the monomer and interaction effects of process parameters on forming quality were analyzed.The results show that the most significant factor affecting the amount of distortion is the wire feed speed,followed by the number of pulses,and the welding speed has the least influence.The influence of pulse number on forming accuracy is obviously greater than that of wire feeding speed and welding speed,and the interaction between wire feeding speed and pulse number is significant.Based on the comprehensive optimization objective,the optimal parameter combination is obtained:wire feed speed 3.5 m/min,welding speed 5.8 mm/s,pulse number 30.The relative errors of distortion amount and forming precision are 10.3%and 4%,respectively,which shows that the model is correct.

关 键 词：电弧增材制造 CMT-P GH4169 响应面法 工艺优化 

分 类 号：TG444[金属学及工艺—焊接] V252.2[一般工业技术—材料科学与工程]