Texture evolution and formability under different hot rolling conditions in ultra purified 17%Cr ferritic stainless steels

2013 ◽  
Vol 75 ◽  
pp. 93-100 ◽  
Author(s):  
Fei Gao ◽  
Zhenyu Liu ◽  
Haitao Liu ◽  
Guodong Wang
Keyword(s):  
Stainless Steels ◽  
Hot Rolling ◽  
Texture Evolution ◽  
Ferritic Stainless Steels ◽  
Hot Rolling Conditions

Influence of Hot Rolling Finishing Temperature on Texture and Ridging Resistance in Stabilized Ferritic Stainless Steels

2021 ◽  
pp. 2000695
Author(s):  
Suresh Kodukula ◽  
Heikki Kokkomäki ◽  
Esa Puukko ◽  
David Porter ◽  
Jukka Kömi
Keyword(s):  
Stainless Steels ◽  
Hot Rolling ◽  
Ferritic Stainless Steels

scholarly journals Mechanisms of Sticking Phenomenon Occurring during Hot Rolling of Two Ferritic Stainless Steels

2007 ◽  
Vol 38 (11) ◽  
pp. 2776-2787 ◽  
Author(s):  
Chang-Young Son ◽  
Chang Kyu Kim ◽  
Dae Jin Ha ◽  
Sunghak Lee ◽  
Jong Seog Lee ◽  
...  
Keyword(s):  
Stainless Steels ◽  
Hot Rolling ◽  
Ferritic Stainless Steels

Sticking Mechanisms Occurring during Hot Rolling of Ferritic Stainless Steels

2007 ◽  
Vol 26-28 ◽  
pp. 3-6 ◽  
Author(s):  
Jong Seog Lee ◽  
Chang Young Son ◽  
Chang Kyu Kim ◽  
Dae Jin Ha ◽  
Sung Hak Lee ◽  
...  
Keyword(s):  
High Temperature ◽  
Stainless Steels ◽  
Hot Rolling ◽  
Material Surface ◽  
Test Results ◽  
Simulation Test ◽  
Ferritic Stainless Steels ◽  
Oxide Layers ◽  
Rolled Material ◽  
Nucleation Sites

Sticking phenomenon occurring during hot rolling of ferritic stainless steels, STS 430J1L and STS 436L, was investigated in this study. The simulation test results at 900 oC and 1000 oC revealed that STS 430J1L had a smaller number of sticking nucleation sites than the STS 436L. When the test temperature was 1070 oC, the sticking hardly occurred in both stainless steels as Fe- Cr oxide layers were formed on the surface of the rolled materials. These findings suggested that the improvement of high-temperature properties of stainless steels and the appropriate rolling conditions for readily forming oxide layers on the rolled material surface were required in order to prevent or minimize the sticking.

scholarly journals Defect Reduction in Ferritic Stainless Steels through Modelling Plastic Deformation and Metallurgical Evolution

2021 ◽  
Vol 3 (1) ◽  
pp. 22
Author(s):  
Silvia Mancini ◽  
Luigi Langellotto ◽  
Andrea Di Schino
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Microstructural Evolution ◽  
Stainless Steels ◽  
Hot Rolling ◽  
Hot Deformation ◽  
Rolling Process ◽  
Process Conditions ◽  
Ferritic Stainless Steels ◽  
Damage Models

Steel products made of ferritic steel can show some defects, such as jagged edges, following the hot rolling process. Aiming to identify the origin of this type of defect in order to help their reduction, an in-depth study has been carried out considering the hot rolling conditions of flat bars made of EN 1.4512 steel. A wide number of references to austenitic stainless steel can be found in literature: almost all the semi-empirical models describing the microstructural evolution during hot deformation refer to austenitic stainless steel. In this work, a comprehensive model for recrystallization and grain growth of the ferritic stainless steel grade EN 1.4512 is proposed, enriching the literature and works regarding ferritic stainless steels. Thermomechanical and metallurgical models have been implemented. The microstructural evolution and the damage of the material were calculated through the coupling of metallurgical and damage models. In the thermomechanical simulations of the roughing passes, three granulometry levels (PFGS) and three heating furnace temperatures were considered. The ferritic grain evolution metallurgical model was obtained by introducing apposite equations. The results highlight that the defect could be produced by process conditions that spark abnormal heating and consequently uncontrolled growth of the grains. The work-hardened grains undergo elongation during hot deformation without recrystallizing. Those grains “squeeze” the surrounding recrystallized grains towards the edges. Thus, on the edges occurs a series of cracks that macroscopically manifest themselves as jagged edges.

Sticking Mechanisms Occurring during Hot Rolling of Ferritic Stainless Steels

2007 ◽  
pp. 3-6
Author(s):  
Jong Seog Lee ◽  
Chang Young Son ◽  
Chang Kyu Kim ◽  
Dae Jin Ha ◽  
Sung Hak Lee ◽  
...  
Keyword(s):  
Stainless Steels ◽  
Hot Rolling ◽  
Ferritic Stainless Steels

Texture Evolution during Direct and Reversed Hot Torsion Tests of Stabilized Ferritic Stainless Steels

2005 ◽  
Vol 495-497 ◽  
pp. 477-482 ◽  
Author(s):  
Tarcisio R. Oliveira ◽  
Frank Montheillet
Keyword(s):  
Texture Component ◽  
Stainless Steels ◽  
Volume Fraction ◽  
Texture Evolution ◽  
Boundary Migration ◽  
Solute Drag ◽  
Shear Direction ◽  
Ferritic Stainless Steels ◽  
Simplified Approach ◽  
Hot Torsion

The study was carried out to understand the mechanisms occurring during the direct (negative shear direction) and reversed (positive shear direction) hot torsion of 11% chromium stabilized ferritic stainless steels. The behaviours induced by various types of stabilization, i.e., when either niobium, or titanium, or both niobium and titanium are used were compared. It was observed that continuous dynamic recrystallization (CDRX) operates in all materials starting at the onset of straining. Niobium has a more pronounced influence on hardening than titanium during hot deformation, which is due to solid solution strengthening and also to the reduction or stopping of grain boundary migration by solute drag effect. The D2 component, {112} < 111 > , was the major texture component at the steady state for the torsion tests carried along the negative shear direction. It was likely to be formed by a combination of strain and the growth of grains exhibiting both low stored energy and low rotation rate of the crystallographic axes. After reversion of the shear direction, i.e. during positive shear, the above major texture component is gradually changed into the D1 component, {112} < 111 > . Using the CMTP method (Continuum Mechanics of Textured Polycrystals), the stress evolution is explained by the volume fraction changes of each component at various strains, associated with their respective Taylor factors. Such simplified approach leads to a good agreement with experimental results.

Effects of high-temperature hardness and oxidation on sticking phenomena occurring during hot rolling of two 430J1L ferritic stainless steels

2008 ◽  
Vol 492 (1-2) ◽  
pp. 49-59 ◽  
Author(s):  
Dae Jin Ha ◽  
Chang-Young Son ◽  
Joon Wook Park ◽  
Jong Seog Lee ◽  
Yong Deuk Lee ◽  
...  
Keyword(s):  
High Temperature ◽  
Stainless Steels ◽  
Hot Rolling ◽  
Ferritic Stainless Steels
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