摘要
切削加工中,材料在经历了瞬态机械载荷和热载荷的剧烈冲击作用后,快速冷却为室温,导致工件表层材料的物理力学性能发生变化,严重影响其使役性能。本文通过DEFORM仿真软件实现7075铝合金晶粒尺寸演化过程预测,揭示应力、应变和温度对晶粒尺寸的影响机制,考虑切削速度对微观组织的结果,构建瞬时高载荷影响下的晶粒尺寸演化预测模型,并进行试验验证,结果表明仿真与实验结果保持一致,最大误差为2.4%。
In cutting process,the material is rapidly cooled to room temperature after experiencing the violent impact of transient mechanical load and thermal load,which leads to the change of physical and mechanical properties of the surface material of the workpiece,and seriously affects its service performance.In this paper,DEFORM simulation software is used to realize the prediction of 7075 aluminum alloy grain size evolution process,reveal the influence mechanism of stress,strain and temperature on grain size,consider the results of cutting speed on microstructure,build a prediction model of grain size evolution under the influence of transient high load,and carry out experimental verification.The results show that the simulation and experimental results are consistent,with the maximum error of 2.4%.
作者
付宏鸽
刘孟阳
黄留洋
张嘉慧
Fu Hongge;Liu Mengyang;Huang Liuyang;Zhang Jiahui(School of Mechanical and Electrical Engineering,North China Institute of Aerospace Engineering,Langfang 065000,China)
出处
《北华航天工业学院学报》
CAS
2024年第2期12-14,20,共4页
Journal of North China Institute of Aerospace Engineering
基金
北华航天工业学院重点项目(ZD202302)
北华航天工业学院创新资助项目(YKY-2022-03)
河北省研究生建设项目(KCJSX2024110)。
