The effect of forming parameter on multi-stage cold forging with 20MnTiB steel

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• 作者：Zhiling Xiao ; Hua Liu ; Baixuan Liu…
• 关键词：20MnTiB steel ; Strain rate ; Deformation degree ; Multi ; stage cold forging ; Adiabatic thermal temperature
• 刊名：The International Journal of Advanced Manufacturing Technology
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：83
• 期：5-8
• 页码：1189-1197
• 全文大小：2,661 KB
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• 作者单位：Zhiling Xiao (1)
  Hua Liu (2)
  Baixuan Liu (2)
  Hongxing Sun (2)
  Dan Liu (2)
  Guanghui Liu (2)
  
  1. School of Mechanical and Electrical Engineering, Zhengzhou University of Light Industry, No. 5 Dongfeng Road, Zhengzhou, Henan Province, 450002, People’s Republic of China
  2. Zhengzhou Research Institute of Mechanical Engineering, Zhengzhou, Henan, China
  
• 刊物类别：Engineering
• 刊物主题：Industrial and Production Engineering
  Production and Logistics
  Mechanical Engineering
  Computer-Aided Engineering and Design
  
• 出版者：Springer London
• ISSN：1433-3015

文摘

The study aims to obtain the effect of forming parameters on multi-stage cold forging with 20MnTiB steel by performing a series of physical simulation and then verified by producing experiment of high-strength bolt. Physical simulation was performed through Gleeble 3500 compression tests; the mainly forming parameters such as strain rate (100∼101), deformation degree (20∼80 %), and number of stages were discussed. The results showed that the strain rate has little effect on the microstructure and the mechanical property. However, the number of stages and the deformation degree have an appreciable effect on the sample microstructure, of which the pearlite grain is fined and ferrite grain is elongated as fiber. The adiabatic thermal temperature rises from 20 to 142 °C with a 60 % deformation degree at a strain rate of 10 s−1. Finally, the deformation properties of bolts can compare with the physical simulation results.