Analysis of ZDDP Films on Sticking Defects by FEM during Hot Rolling of Ferritic Stainless Steel Strips

2016 ◽  
Vol 846 ◽  
pp. 96-101
Author(s):  
Liang Hao ◽  
Zheng Yi Jiang ◽  
Dian Yao Gong ◽  
Dong Bin Wei ◽  
Xia Wei Cheng ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Stainless Steel ◽  
Ferritic Stainless Steel ◽  
Hot Rolling ◽  
Steel Strip ◽  
Crack Size ◽  
Surface Characterisation ◽  
Fem Model ◽  
Steel Strips ◽  
Simulation Results

The aim of this study is to understand the effect of zinc dialkyl dithio phosphate (ZDDP) films on sticking defects during the hot rolling of ferritic stainless steel strips. The surface characterisation and crack propagation are very important for the sticking defects of ferritic stainless steel strip. A finite element method (FEM) model is constructed with different crack size ratios, in which the profile of the strip roughness and ZDDP films are taken into consideration. Simulation results show that the widths of cracks tend to be reduced with the introduction of ZDDP films, improving the sticking defects, which is confirmed by the hot rolling trials.

scholarly journals Experimental and Numerical Study on the Effect of ZDDP Films on Sticking During Hot Rolling of Ferritic Stainless Steel Strip

2016 ◽  
Vol 47 (10) ◽  
pp. 5195-5202 ◽  
Author(s):  
Liang Hao ◽  
Zhengyi Jiang ◽  
Dongbin Wei ◽  
Dianyao Gong ◽  
Xiawei Cheng ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Ferritic Stainless Steel ◽  
Hot Rolling ◽  
Numerical Study ◽  
Steel Strip

Analysis and prevention of sticking occurring during hot rolling of ferritic stainless steel

2009 ◽  
Vol 507 (1-2) ◽  
pp. 66-73 ◽  
Author(s):  
Dae Jin Ha ◽  
Hyo Kyung Sung ◽  
Sunghak Lee ◽  
Jong Seog Lee ◽  
Yong Deuk Lee
Keyword(s):  
Stainless Steel ◽  
Ferritic Stainless Steel ◽  
Hot Rolling

scholarly journals Recrystallization of niobium stabilized ferritic stainless steel during hot rolling simulation by torsion tests

2016 ◽  
Vol 5 (1) ◽  
pp. 92-99 ◽  
Author(s):  
Flávia Vieira Braga ◽  
Diana Pérez Escobar ◽  
Thompson Junior Ávila Reis ◽  
Nilton José Lucinda de Oliveira ◽  
Margareth Spangler Andrade
Keyword(s):  
Stainless Steel ◽  
Ferritic Stainless Steel ◽  
Hot Rolling

An Experimental Investigation of Surface Pit Evolution During Cold-Rolling or Drawing of Stainless Steel Strip

2000 ◽  
Vol 123 (1) ◽  
pp. 1-7 ◽  
Author(s):  
R. Ahmed ◽  
M. P. F. Sutcliffe
Keyword(s):  
Experimental Investigation ◽  
Stainless Steel ◽  
Hydrodynamic Lubrication ◽  
Steel Strip ◽  
Similar Rate ◽  
Steel Strips ◽  
Strip Drawing ◽  
Hot Band ◽  
Cold Rolled

This paper presents an experimental investigation of the mechanisms of pit elimination in strip drawing and rolling of stainless steel strips. Strip drawing tests with artificial indents confirm the role of micro-plasto-hydrodynamic lubrication (MPHL) in allowing pits to be reduced in size and depth. The similarity of results for two oils, which differ in viscosity by a factor of 10, is attributed to the fact that oil is drawn out of the pits rather easily, so that the behavior tends to the unlubricated case. Similar behavior is observed for strip drawing of shot blast white hot band. For much smoother bright anneal strip, it is suggested that the presence of an oil film in the unpitted region prevents generation of pressure differences between the pits and the unpitted regions. A comparison of strip-drawn and cold-rolled stainless steel samples show that the change in pit area and Rq roughness varies with overall reduction in a remarkably similar way. The reason for such similar behavior is attributed to the absence of hydrodynamic action in preventing pit elimination, albeit for opposite reasons. The similar rate of pit evolution in both cases confirms the usefulness of the strip drawing rig as a tool to model the change of surface topography during rolling, as long as care is taken in matching the regimes of lubrication.

scholarly journals Study on Surface Roughness and Friction during Hot Rolling of Stainless Steel 301

2012 ◽  
Vol 500 ◽  
pp. 403-409
Author(s):  
Dong Bin Wei ◽  
Zheng Yi Jiang ◽  
Jun Xia Huang ◽  
Ai Wen Zhang ◽  
Xu Shi ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Stainless Steel ◽  
Oxide Scale ◽  
Hot Rolling ◽  
Steel Strip ◽  
Forming Process ◽  
Metal Forming Process ◽  
Gleeble 3500 ◽  
Short Time ◽  
Deformation Surface

A well-defined boundary condition is important for generating an accurate model for simulating metal forming process. It is important to characterize the features of the oxide scale in hot rolling of stainless steel strip. Short time oxidation tests in humid air with water vapor content of 7.0 vol. % were carried out using Gleeble 3500 thermo-mechanical simulator. The deformation, surface morphology of oxide scale, and the friction in hot rolling were studied by conducting hot rolling tests. The results show that the surface roughness decreases with an increase of reduction. The effect of oxide scale on friction and surface roughness transfer in hot rolling depends on oxide scale generated during reheating. When reheating time is increased, the average thickness of oxide scale increases and a relatively rough surface was obtained after hot rolling. Thick oxide scale of 301 steel shows the high lubricative effect.

Hot deformation behavior of a ferritic stainless steel stabilized with Nb during hot rolling simulation at different temperature ranges

2016 ◽  
Vol 31 (5) ◽  
pp. 635-645 ◽  
Author(s):  
Flávia Vieira Braga ◽  
Diana Pérez Escobar ◽  
Nilton José Lucinda de Oliveira ◽  
Margareth Spangler Andrade
Keyword(s):  
Stainless Steel ◽  
Ferritic Stainless Steel ◽  
Hot Rolling ◽  
Hot Deformation ◽  
Deformation Behavior ◽  
Hot Deformation Behavior ◽  
Temperature Ranges ◽  
Image Position

Abstract

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