Scientific journal
Scientific Review. Technical science
ISSN 2500-0799
ПИ №ФС77-57440

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IMPROVEMENT OF LARGE-SIZED DIES DURABILITY

Gotlib B.M. 1Sergeev R.F. 1
1 Ural state university of railway transport
A study on the precision of die forging of special steels and the durability of forming dies is presented for large-sized dies when forged on high-pressure vertical hydraulic presses. The precision is increased with a profiling of the die’s pressure face followed by a cyclic hardening. The die is hardened by the induction of residual stress, which allows the die to operate within elastic deformation instead of elastic-plastic deformation. Two 5HNM steel samples were hardened by the cyclic tension forces of 150 and 200 MPa under the temperature of 500 °C. From 10 to 20 cycles were required for the samples to start showing elastic deformation. When the temperature was raised to 600 °C no hardening was observed under the stress of 150 MPa. A technique for profiling and cyclic hardening of dies produced of 5HNM steel is proposed. The die was tested on an industry-grade 300 MN press by upsetting 300 mm disks of H15N5D2T steel. The plastic deformation of the die bed contour amounted to 1 mm.

Библиографическая ссылка

Готлиб Б.М., Сергеев Р.Ф. ПОВЫШЕНИЕ СТОЙКОСТИ КРУПНОГАБАРИТНЫХ ШТАМПОВ // Научное обозрение. Технические науки. 2015. № 1. С. 139-139;
URL: https://science-engineering.ru/en/article/view?id=952 (дата обращения: 31.05.2026).