Research on Phase Transformation Analysis and Process Optimization of Grinding Considering Microscopic Grains

doi:10.3901/JME.2022.11.269

Abstract

Abstract: The alternating forces and thermal loads during the grinding process can change the microscopic grains in the material, resulting in phase transformation that can affect the performance of high-end aerospace parts. In this article, the relationship between microscopic grains and phase transformation are taken as the entry point, and the influence of process parameters on the microscopic grain of the material is analyzed through grinding experiments on the maraging steel 3J33, which is a kind of materials for manufacture of inertial navigation components. The mechanism of grain size and orientation difference angle on the transformation ratio of different phase components is investigated, and the key process factors affecting phase transformation are discussed. Then a phase transformation prediction model considering microscopic grains is established, and the results shows that the proposed model can calculate the transformation ratio of the phases more accurately than traditional phase transformation model based on heating rate and strain rate. On this basis, the sensitivity of the process parameters to the transformation of each phase is quantitatively calculated, and a process optimization scheme for grain refinement and phase transformation control is proposed, which provides a theoretical basis and engineering guidance for high-performance grinding of maraging steel.

Key words: grinding, microscopic grains, phase transformation, process optimization

CLC Number:

TG580

GUO Weicheng, SUN Gaoxiang, DING Zishan, WU Chongjun, LIU Xiao. Research on Phase Transformation Analysis and Process Optimization of Grinding Considering Microscopic Grains[J]. Journal of Mechanical Engineering, 2022, 58(11): 269-281.

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