Transactions of Materials and Heat Treatment

Title：Research on precision die forging of steel brake discs for high-speed EMUs

Authors：

Unit：

KeyWords： steel brake disc precision die forging deformation force equivalent stress equivalent strain

ClassificationCode：TG312

year,vol(issue):pagenumber：2021,46(6):64-71

Abstract：

In order to develop precision die forgings of steel brake disc for high-speed EMUs on the existing die forging equipment, the process of precision die forging was simulated by software Deform-3D, and the structures and dimensions of precision die forgings for steel brake disc was optimized. On this basis, the numerical simulation of precision die forging process was conducted with the initial forging temperatures of 1150，1180 and 1200 ℃, the friction factors between die and billet of 0.25, 0.30 and 0.35, the loading speeds of 300, 400 and 500 mm·s-1 respectively on the basis of the other process parameters being the same. The analysis results show that with the increasing of initial forging temperature, the deformation force decreases, the maximum equivalent stress at the end of final forging increases, and the maximum equivalent strain decreases first and then increases. With the increasing of friction factor, the deformation force increases, and the maximum equivalent stress and the maximum equivalent strain at the end of final forging increase. With the increasing of loading speed, the maximum equivalent stress and the maximum equivalent strain increase. Finally, the accuracy of numerical simulation was verified by electric screw press of 220 MN.

Funds：

付传锋（1982-），男，硕士，高级工程师 E-mail：fcf1012@163.com

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