Analysis of the Wedge Tip Fillet for Central Defeats in the Process of Cross Wedge Rolling 4Cr9Si2 Valve

Abstract:

Forming process of 4Cr9Si2 martensite refractory steel by cross wedge rolling was simulated by means of rigid-plastic finite elementDEFROM-3D software. From wedge tip angle to analyze the central defeats: The increase of maximum stress and its duration time is resulted from the rise of wedge tip fillet (R); the maximum shear stress and maximum shear strain did not change significantly, but its duration time will enlarge with increasing of wedge tip fillet; these factor will lead to the higher possibility of internal defeats. Rolling experiments are carried out to verify the correctness of the FEM and feasibility of simulation results by the experiment: internal defeats have appeared in the conditions of R=12mm.

• Periodical: Advanced Materials Research (Volumes 706-708)
• Pages: 3-6
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.706-708.3
• Online since: June 2013
• Authors: Feng Xian Zhao, Jin Ping Liu, Jiang Hua Huang, Zheng Huan Hu
• Keywords: 4Cr9Si2, Cross Wedge Rolling, Internal Defect, Valve, Wedge Tip Fillet

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