Transactions of Materials and Heat Treatment

Title：Numerical simulation analysis on wear and life of mold in bar extrusion process for GH4169 alloy blade

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ClassificationCode：TF823

year,vol(issue):pagenumber：2021,46(3):198-207

Abstract：

Rod extrusion process is the first process during the hot forming of GH4169 alloy blade. As a billet-making process, it not only ensures the accurate size and shape, but also ensures that the microstructure of workpiece meets the process requirements. However, the working condition of mold seriously affects the internal quality of workpiece. Therefore, based on the Archard wear theory, taking the lower mold as the research object, its wear process was simulated by finite element software Deform-2D, and the influences of process and mold parameters such as workpiece temperatures, mold hardness, speed of bar extrusion, friction coefficient and fillet radius of lower mold for workpiece on the lower mold wear were analyzed to obtain the influence laws of relevant factors on the lower mold wear. Furthermore, the wear amount was accumulated, and the mold life was predicted with the maximum wear amount of 0.2 mm according to the process requirements. The results show that the finite element method is used to simulate the bar extrusion process so as to analyze the force and wear of mold and the influences on the quality of workpiece and optimize the mold design and process parameters. While improving the quality of workpiece, the mold life is extended and the production cost is reduced.

Funds：

陕西省重点研发计划（2019KW-022）

杨红超（1979-），男，学士，工程师 E-mail：11478620@qq.com 通讯作者：和永岗（1978-），男，博士，高级工程师 E-mail:30149395@qq.com

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