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Open AccessArticle

Finite Element Analysis of Extrusion Process for Magnesium Alloy Internal Threads with Electromagnetic Induction-Assisted Heating and Thread Performance Research

by Meng Liu 1,2, Zesheng Ji 1,*, Rui Fan 2 and Xingguo Wang 2
1
Departments of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 100080, China
2
Departments of Mechanical and Electrical Engineering, Qiqihar University, Qiqihar 161006, China
*
Author to whom correspondence should be addressed.
Materials 2020, 13(9), 2170; https://doi.org/10.3390/ma13092170
Received: 24 March 2020 / Revised: 19 April 2020 / Accepted: 27 April 2020 / Published: 8 May 2020
(This article belongs to the Special Issue Machining and Manufacturing of Alloys and Steels)
The casting magnesium alloy AZ91D cannot be extruded at room temperature. This paper presents a process for extruding internal threads using AZ91D heated by electromagnetic induction. The feasibility of the process is verified by finite element simulation and experiments. Using DEFORM-3D to simulate the process of extruding a M12 × 1.25 mm threaded hole by electromagnetic induction-assisted heating, the equivalent stress-strain and material flow law in the process of thread deformation was analyzed and verified by experiments. Three parameters—hole diameter, machine speed and heating temperature—were considered to study the influence of different process conditions on the forming torque. The results show that a heating temperature above 523 K can improve the plasticity of AZ91D. The hole diameter has an important influence on the forming torque. The forming process is not suitable for high-speed machining. The surface metal of the thread formed by this process has a strong deformation layer, which can improve the strength and hardness of the thread. View Full-Text
Keywords: electromagnetic induction; DEFORM-3D; Material flow; hole diameter; heating temperature electromagnetic induction; DEFORM-3D; Material flow; hole diameter; heating temperature
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MDPI and ACS Style

Liu, M.; Ji, Z.; Fan, R.; Wang, X. Finite Element Analysis of Extrusion Process for Magnesium Alloy Internal Threads with Electromagnetic Induction-Assisted Heating and Thread Performance Research. Materials 2020, 13, 2170.

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