Desired microstructure and surface integrity are critical to achieving the high performance of additively manufactured components.In the present work,the hybrid post-processes of magnetic abrasive finishing(MAF)and po...Desired microstructure and surface integrity are critical to achieving the high performance of additively manufactured components.In the present work,the hybrid post-processes of magnetic abrasive finishing(MAF)and post-heat treatment(HT)were applied to the additively manufactured Inconel718 superalloys.Their hybrid effects and influencing mechanism on the surface quality and mechanical properties of the additively manufactured samples have been studied comparatively.The results show that the MAF process effectively reduces the surface roughness by more than an order of magnitude due to the flexibility and geometric consistency of the magnetic particles and abrasives with the finished surfaces.The proper sequence of MAF and HT obtains enhanced mechanical properties for the homogenized-MAF-aged sample with the yield strength of 1147 MPa,the ultimate tensile strength of 1334 MPa,and the elongation of 22.9%,which exceeds the standard wrought material.The surface integrity,compressive residual stress field,and grain refinement induced by the MAF and subsequent aging heat treatment increase the cracking resistance and delay the fracture failure,which significantly benefits the mechanical properties.The MAF process combined with proper post-heat treatment provides an effective pathway to improve the mechanical properties of additively manufactured materials.展开更多
针对宝钢特殊钢事业部新建的国内首条合金板带热轧炉卷生产线热处理项目,采用Visual C++6.0,Siemens的WinCC 6.2和SQL Server 2005等开发了中厚板热处理加热过程在线控制应用软件.软件主要包括人机交互界面、过程计算模型、通信软件和...针对宝钢特殊钢事业部新建的国内首条合金板带热轧炉卷生产线热处理项目,采用Visual C++6.0,Siemens的WinCC 6.2和SQL Server 2005等开发了中厚板热处理加热过程在线控制应用软件.软件主要包括人机交互界面、过程计算模型、通信软件和实时数据管理系统,详细介绍了过程计算核心模型的建模原理.在线应用结果表明,该系统与基础自动化系统结合不仅降低了操作强度,而且大幅度提高了加热工艺的控制精度和钢板的加热质量.展开更多
基金financial support from the Fundamental Research Funds for the Central Universities in China(No.2021CDJQY-024)the Research Project from Chongqing Key Laboratory of Metal Additive Manufacturing(3D Printing)in Chongqing University(No.02090011044158)the National Natural Science Foundation of China(No.51975073)。
文摘Desired microstructure and surface integrity are critical to achieving the high performance of additively manufactured components.In the present work,the hybrid post-processes of magnetic abrasive finishing(MAF)and post-heat treatment(HT)were applied to the additively manufactured Inconel718 superalloys.Their hybrid effects and influencing mechanism on the surface quality and mechanical properties of the additively manufactured samples have been studied comparatively.The results show that the MAF process effectively reduces the surface roughness by more than an order of magnitude due to the flexibility and geometric consistency of the magnetic particles and abrasives with the finished surfaces.The proper sequence of MAF and HT obtains enhanced mechanical properties for the homogenized-MAF-aged sample with the yield strength of 1147 MPa,the ultimate tensile strength of 1334 MPa,and the elongation of 22.9%,which exceeds the standard wrought material.The surface integrity,compressive residual stress field,and grain refinement induced by the MAF and subsequent aging heat treatment increase the cracking resistance and delay the fracture failure,which significantly benefits the mechanical properties.The MAF process combined with proper post-heat treatment provides an effective pathway to improve the mechanical properties of additively manufactured materials.
文摘针对宝钢特殊钢事业部新建的国内首条合金板带热轧炉卷生产线热处理项目,采用Visual C++6.0,Siemens的WinCC 6.2和SQL Server 2005等开发了中厚板热处理加热过程在线控制应用软件.软件主要包括人机交互界面、过程计算模型、通信软件和实时数据管理系统,详细介绍了过程计算核心模型的建模原理.在线应用结果表明,该系统与基础自动化系统结合不仅降低了操作强度,而且大幅度提高了加热工艺的控制精度和钢板的加热质量.
