Transactions of Materials and Heat Treatment

Title：Numerical simulation and parameter optimization on hot upsetting for GH4169 alloy dodecagonal head bolt

Authors： Tang Tao Wang Rong

Unit： AVIC Zhuzhou Aviation Parts Manufacturing Co. Ltd.

KeyWords： GH4169 alloy dodecagonal head bolt orthogonal experiment hot upsetting multi-objective optimization

ClassificationCode：TG311

year,vol(issue):pagenumber：2021,46(12):20-26

Abstract：

To optimize the hot upsetting parameters of GH4169 alloy dodecagonal head bolts and reduce the problems of overheating and overburning, folding, cracking and mold cracking, an orthogonal experimental optimization scheme was established for the key parameters of hot upsetting such as billet heating temperature, upsetting speed and friction factor, and a Deform-3D numerical simulation thermal coupling model for the hot upsetting of GH4169 alloy dodecagonal head bolt was established. Then, the multi-objective optimization of upsetting force, damage value, equivalent force and equivalent strain was carried out. The optimized hot upsetting parameters are the billet heating temperature of 1020 ℃, the upsetting speed of 300 mm·s-1 and the friction factor of 0.3. Compared with the original hot upsetting parameters, the hot upsetting load, damage value of part, equivalent stress, equivalent strain and upsetting rate are improved, and the forming quality and efficiency are improved. The production practice results show that the simulation results match well with the actual production results, the product quality is improved well, there are no defects such as cracks, folds, defects etc. in the microscopic inspection, and the metallographic grade meets the technical requirements.

Funds：

企业级攻关项目基金（T21012，K21029）

汤涛（1985-），男，硕士，工程师 E-mail：nbvcx163@163.comGH4169

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