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Research and Manufacture of Short-Flow Hot Extrusion Forming and Seamless Pipe for GH3625 Superalloy

  • Yubi Gao
  • Yutian Ding
  • Bin Meng
  • Zhengyi Dou
  • Xin Gao
  • Zhi Jia
Conference paper

Abstract

In order to obtain GH3625 superalloy seamless pipe, the GH3625 superalloy seamless pipe with Φ28 × 5.5 mm was developed through short-flow hot extrusion forming and cold rolling molding process. And a comprehensive evaluation for the microstructure and mechanical properties of GH3625 superalloy seamless pipe was conducted. The results showed that the hollow tube has been successfully extruded the GH3625 superalloy tube with Φ43 × 9.5 mm under the condition of fixed extrusion speed of 50 mm/s, preheating temperature of 1150 °C and extrusion ration of 7.4. The alloy tube was composed of a small amount of deformation twin and a large number of equiaxed crystal mixed crystal structure, the average grain size was about 8.6, and the tensile strength at room temperature and elongation at break were 771 MPa and 52.33%, respectively, showing good cold working performance and mechanical properties. The performance of GH3625 superalloy seamless pipe after cold rolling and annealing is in accordance with ASTM-B163-04 international standard.

Keywords

GH3625 superalloy Short-flow Hot extrusion Cold rolling deformation Seamless pipe 

Notes

Acknowledgements

This study was funded by the National Natural Science Foundation of China (No. 51661019), The Science and Technology Projects of Gansu Province (No. 145RTSA004), the State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology.

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Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  • Yubi Gao
    • 1
  • Yutian Ding
    • 1
  • Bin Meng
    • 1
  • Zhengyi Dou
    • 1
  • Xin Gao
    • 1
  • Zhi Jia
    • 1
  1. 1.State Key Laboratory of Advanced Processing and Recycling of Nonferrous MetalsLanzhou University of TechnologyLanzhouChina

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