2195铝锂合金半球壳对流换热系数数值计算及淬火模拟  

Numerical calculation of convective heat transfer coefficient and quenching simulation of 2195 Al-Li alloy hemispherical shell

作　　者：宋科锦 杜玥 付雪松[1] 康黎[2] 杜宝宪[2] 周文龙[1] Song Kejin;Du Yue;Fu Xuesong;Kang Li;Du Baoxian;Zhou Wenlong(School of Materials and Engineering,Dalian University of Technology,Dalian Liaoning 116081,China;Beijing Aerospace Materials and Technology Research Institute,Beijing 100076,China)

机构地区：[1]大连理工大学材料科学与工程学院,辽宁大连116081 [2]北京航天材料及工艺研究所,北京100076

出　　处：《金属热处理》2025年第1期243-249,共7页Heat Treatment of Metals

摘　　要：采用分析法和数值法相结合的方法,对2195铝锂合金半球壳的对流换热系数近似计算,分析空冷和水冷情况下对流换热系数随温度的变化规律。用ABAQUS有限元模拟软件,通过构建热力耦合模型,采用有限元方法对φ200 mm和φ100 mm的2195铝锂合金半球壳淬火过程进行模拟,分析淬火过程中的应力应变规律。结果表明,水冷过程中,铝锂合金半球壳的换热系数随工件表面温度由低到高,呈先增后降的趋势,并且峰值点出现在175℃左右;空冷过程中,对流换热系数随工件温度的升高而增大。淬火过程模拟结果表明,在半球壳口部产生应力集中现象,塑性应变主要发生在半球壳口部表面处,并且不同尺寸半球壳不同入水温度冷却后的应力、应变分布规律相似。By combining analytical and numerical methods,the convective heat transfer coefficient of 2195 aluminum lithium alloy hemispherical shell was approximately calculated,and the variation law of convective heat transfer coefficient with temperature under air cooling and water cooling conditions was analyzed.Using ABAQUS finite element simulation software,a thermo-mechanical coupling model was constructed,and the quenching process of the 2195 aluminum lithium alloy hemispherical shells with diameters of φ200 mm and φ100 mm was simulated by finite element method,and the stress and strain laws during the quenching process were analyzed.The results show that during the water cooling process,the heat transfer coefficient of the aluminum lithium alloy hemispherical shell increases first and then decreases with the surface temperature of the workpiece from low to high,and the peak point appears at around 175 ℃.During the air cooling process,the convective heat transfer coefficient increases with the increase of workpiece temperature.The simulation results of the quenching process indicate that stress concentration occurs at the mouth of the hemispherical shell,and plastic strain mainly occurs at the surface of the hemispherical shell mouth.The stress and strain distribution patterns of hemispherical shells with different sizes after cooling at different inlet water temperatures are similar.

关 键 词：对流换热系数 2195铝锂合金 热力耦合 有限元模拟 淬火 

分 类 号：TG441.8[金属学及工艺—焊接]