激光熔化沉积30CrNi2MoVA温度场数值模拟研究  

Numerical simulation study of temperature field for laser melting deposition of 30CrNi2MoVA

作　　者：丁鑫钰 李伟[1] 张煜杭 陈龙庆[2] 王宗平 殷鸣[1] DING Xinyu;LI Wei;ZHANG Yuhang;CHEN Longqing;WANG Zongping;YIN Ming(School of Mechanical Engineering,Sichuan University,Chengdu 610065,CHN;Key Laboratory of Radiation Physics and Technology of Ministry of Education,Institute of Nuclear Science and Technology,Sichuan University,Chengdu 610000,CHN)

机构地区：[1]四川大学机械工程学院,四川成都610065 [2]四川大学原子核科学技术研究所教育部辐射物理与技术重点实验室,四川成都610000

出　　处：《制造技术与机床》2024年第1期19-25,共7页Manufacturing Technology & Machine Tool

基　　金：国家自然科学基金(52075352);四川省科技计划项目(2021YJ0055和2020ZDZX0014)。

摘　　要：30CrNi2MoVA钢被广泛用于军工炮管制备,由于工作环境恶劣,其零件表面易出现磨损、裂纹等损伤,常采用激光熔化沉积技术(laser melting deposition,LMD)完成表面修复工作。LMD过程中的热行为决定了材料组织演变从而影响零件的表面质量及力学性能。基于ABAQUS搭建LMD过程30CrNi2MoVA钢的温度场有限元模型。研究LMD过程中温度场的分布以及加工工艺参数对温度场的影响,分析了薄壁件沉积过程中的热历史及传热特征,并设计了相关实验验证模型的适用性。结果表明:LMD温度场沿扫描方向呈对称分布,激光功率每增大100 W,熔池最高温度增加约40℃,扫描速度则相反。随着沉积层数上升,热积累效应增大,熔池峰值温度升高,冷却速度降低。The 30CrNi2MoVA steel is commonly utilized in the manufacturing of military gun barrels.However,the harsh working conditions that these barrels are exposed to cause wear,cracks,and other types of damage to the surfaces of the steel parts.As a result,the laser melting deposition technology(LMD)is frequently implemented to repair these surfaces.The quality and mechanical properties of the parts are significantly influenced by the thermal behavior that occurs during the LMD process,as it affects the material structure evolution.To investigate these effects,a finite element model of the temperature field of 30CrNi2MoVA steel during the LMD process was developed using ABAQUS.This model was utilized to examine the temperature distribution law during the LMD process,and the influence of processing parameters on temperature field.The thermal history and heat transfer characteristics of thinwalled parts during deposition were analyzed,and relevant experiments were designed to verify the applicability of the model.The study revealed that the LMD temperature field has a comet-shaped pattern,and for every 100 W increase in laser power,the maximum temperature of the molten pool increases by about 40℃,while the scanning speed has an opposite effect.Moreover,as the deposition layers increase,the thermal accumulation effect intensifies,resulting in an increase in the peak temperature of the molten pool and a decrease in cooling rate.

关 键 词：激光熔化沉积 30CrNi2MoVA钢 数值模拟 温度场 

分 类 号：TG485[金属学及工艺—焊接]