New Groove Design and Forming Simulation of Uniform Severe Strain of Bar Rolling

LI Xue-tong,CAO Lei,WANG Min-ting,DU Feng-shan

Physics Examination and Testing ›› 2013, Vol. 31 ›› Issue (2) : 21-25.

Physics Examination and Testing ›› 2013, Vol. 31 ›› Issue (2) : 21-25.
Test and Research

New Groove Design and Forming Simulation of Uniform Severe Strain of Bar Rolling

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Abstract

Through the discussion of the traditional caliber and the analysis of simulation result, a new groove design method for bar rolling of uniform severe strain was proposed based on the principle of severe plastic deformation to manufacture ultra-fine grain(UFG),and flat-oval groove type with the characteristic of multidirectional severe deformation was developed. The warm rolling numerical model of bar was established and analyzed by nonlinear finite element method. The laws of plastic strain distribution in cross-section of bar were analyzed between the new caliber and traditional caliber. The simulated results indicated that the new flat-oval caliber can be better to introduce the plastic strain to the center of cross section and get uniform severe strain under the condition of qualified size. The largest strain was more than 5.0 at the center of cross section, which meets the severe deformation condition to produce ultra-fine grain.

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LI Hua-Tong. New Groove Design and Forming Simulation of Uniform Severe Strain of Bar Rolling[J]. Physics Examination and Testing, 2013, 31(2): 21-25

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