Transactions of Materials and Heat Treatment

Title：Hot upsetting process of supersized superalloy GH4169 bolts for aerospace

Authors： Jin Hong Yin Yinyin Liu Le1 Liu Dan

Unit： 1.Henan Provincial Key Laboratory of Fastening Technology 2.Henan Aerospace Precision Manufacturing Co. Ltd. 3.Zhengzhou Research Institute of Mechanical Engineering Co. Ltd.

KeyWords： super\|sized bolts superalloy GH4169 high\|temperature compression experiment deformation resistance hot upsetting process

ClassificationCode：TG314.3

year,vol(issue):pagenumber：2022,47(6):55-60

Abstract：

In order to study the hot upsetting process of super\|sized GH4169 superalloy bolts for aerospace, the high\|temperature compression experiment of material was carried out by the thermal simulation testing machine, and the influences of different deformation temperatures and strain rates on the deformation resistance of material were analyzed. Then, the hot upsetting process of superalloy GH4169 bolts was numerically simulated, and the influences of the distributions of equivalent stress field, damage value and metal streamline, and friction factor on forming load during the forming process were analyzed. Finally, the process experiment was carried out. The results show that when the strain rate is constant, the deformation resistance of material decreases gradually with the increaseing of deformation temperature. When the deformation temperature is constant, the deformation resistance of material increases gradually with the increaseing of strain rate. When the friction factor μ=0.3, the maximum load in the forming process is 3.56×106 N，and when the friction factor μ=0.5, the maximum load in the forming process is 4.11×106 N. The superalloy GH4169 bolt forgings obtained by the process experiment are fully filled, the sizes meet the requirements, and no forging defects are found, which meets the using needs of aerospace field.

Funds：

国家科技重大专项资助项目（2013ZX04002081）

金宏（1989-），男，学士，工程师 Email：jin_hong@casic694.com

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