Evolution Behavior of Sunking Defect in Forging Rolling Process of Bearing Ring

2014 ◽  
Vol 50 (14) ◽  
pp. 118
Author(s):  
Shiyuan LUO
Keyword(s):  
Rolling Process ◽  
Bearing Ring ◽  
Evolution Behavior

Simulative Study of Evolution Behavior of Transverse Surface Crack in Rolling Process

2011 ◽  
Vol 403-408 ◽  
pp. 88-92
Author(s):  
Ya Gao ◽  
Jian Lin Sun ◽  
Bing Yun
Keyword(s):  
Tensile Stress ◽  
Surface Crack ◽  
Rolling Direction ◽  
Crack Tip ◽  
Element Model ◽  
Rolling Process ◽  
Friction Coefficients ◽  
High Crack ◽  
Explicit Finite Difference ◽  
Evolution Behavior

Based on explicit finite difference algorithm, finite element model of steel plate with transverse surface crack in rough rolling was found. The evolution regularity of transverse surface crack in rolling process was calculated with the model, and effect of different crack sizes, different friction coefficients and different roll diameters on crack evolution were studied. The research indicated that, in rolling direction, the crack tip stress changed from tensile stress to compression stress and then tensile stress again; length and depth of crack both had effect on the healing and propagation of the crack, and mostly in the way of influencing displacement of freedom surface of the crack; different friction coefficients showed no effect on crack tip propagation, but low friction coefficient would be in favor of crack healing at crack bottom; small roll diameter would lead to high crack tip tensile stress and more propagation at crack tip.

Analysis of the evolution behavior of voids during the hot rolling process of medium plates

2015 ◽  
Vol 221 ◽  
pp. 121-127 ◽  
Author(s):  
Bo Wang ◽  
Jiongming Zhang ◽  
Chao Xiao ◽  
Wei Song ◽  
Shunxi Wang
Keyword(s):  
Hot Rolling ◽  
Rolling Process ◽  
Hot Rolling Process ◽  
Evolution Behavior
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