Research on the L2 Control Model Technology of Double Cold Reduction During Continuous Annealing Process

2019 ◽  
pp. 117-129
Author(s):  
Wei Guo ◽  
Hui Wang ◽  
Yanglong Li ◽  
Jie Wen ◽  
Meng Yu ◽  
...  
Keyword(s):  
Control Model ◽  
Annealing Process ◽  
Cold Reduction ◽  
Continuous Annealing

The Steady-State Model of Heating Process in Horizontal Continuous Annealing Furnace

2011 ◽  
Vol 233-235 ◽  
pp. 2428-2431
Author(s):  
Gang Zhou ◽  
Zhi Wen ◽  
Rui Feng Dou ◽  
Fu Yong Su ◽  
Xu Fang ◽  
...  
Keyword(s):  
Steady State ◽  
Physical And Mechanical Properties ◽  
Annealing Process ◽  
State Model ◽  
Heating Process ◽  
Continuous Annealing ◽  
Annealing Furnace ◽  
Heating Section ◽  
Steady State Model ◽  
New Varieties

The continuous annealing process of strip steel is aimed to archive the required physical and mechanical properties. During this process, strip temperature is of great importance for controlling metallurgical transformation and grain size. This paper describes the modeling of the heating process in a horizontal annealing furnace used for producing stainless steel. The steady-state model is designed to predict strip temperature in the heating section, so it can simulate the annealing process of new varieties of steel never been produces. The strip temperatures predicted by model well correspond to the field data. This confirms the correctness and accuracy of the model.

Study on Continuous Annealing Process for Ultrathin Cold-Rolled SPCC Steel

2015 ◽  
Vol 817 ◽  
pp. 268-272
Author(s):  
Wu Yan Fan ◽  
Ren Bo Song ◽  
Ru Wen Zheng ◽  
Pei Sheng Yao
Keyword(s):  
Annealing Temperature ◽  
Annealing Process ◽  
Continuous Annealing ◽  
Precipitation Behavior ◽  
Transmission Electron ◽  
Batch Annealing ◽  
Thin Steel ◽  
Cold Rolled ◽  
R Value ◽  
General Specification

The continuous annealing process was simulated on the heat treatment system for thin steel sheet (CCT-AY-II). As the recrystallization was known, the annealing temperature and holding time were taken into account to study the influence on microstructure and mechanical properties of 0.08mm ultrathin cold-rolled SPCC steel. Combined with transmission electron microscope (TEM), the precipitation behavior was analyzed. The optical micrographs show that the microstructure of the samples are more similar to batch-annealing steel rather than general specification SPCC steel through continuous annealing. With 5°C/s heating rate and annealed at 860°C for 80s, the sample performs best: the yield strength is 161MPa, the elongation is 29% and the r-value is 1.51. AlN and MnS precipitations are observed in the inner grain and at grain boundary. The annealed textures mostly composed of {111} texture. The highest intensity is centered around the {111}<110> orientation.

Modelling and simulation of residual stress of strip during continuous annealing process

2019 ◽  
Vol 37 (2) ◽  
pp. 664-681
Author(s):  
Chun-Jian Su ◽  
Yong Li ◽  
De-Xing Yang ◽  
Zhen-Hua Bai ◽  
Rui Wang ◽  
...  
Keyword(s):  
Residual Stress ◽  
Steel Strip ◽  
Finite Element Method Simulation ◽  
Calculation Model ◽  
Annealing Process ◽  
Continuous Annealing ◽  
Content Type ◽  
Influence Model ◽  
Stress And Deformation ◽  
The One

Purpose The purpose of this study is to solve the key problem of the residual stress of strip in buckling and deviation during the continuous annealing process (CAP). Design/methodology/approach Considering the one-to-one correspondence between deformation and residual stress, the strip was divided into multiple elements. To obtain the total deformation of each element, the influence model of some factors on the deformation of steel strip element was established. Then, according to the constitutive equation of residual stress and deformation, and the deformation coordination relation between strip elements, a set of calculation model, which is suitable for residual stress of strip during CAP was established, the model precision was verified by finite element method simulation, and the influences on residual stress of strip were also analyzed. Findings The weighted calculation of comparison between analytical results and simulation shows that the accuracy of the analytical method is within 10 per cent, which fully meets the requirements. Originality/value The different residual stress of steel strip can be displayed quickly and intuitively in the synchronous process segment according to this model, which is of great importance to the prevention of strip buckling and deviation.

Recrystallization Law of Ti-IF Steel During Annealing Process

2011 ◽  
Vol 399-401 ◽  
pp. 2301-2304
Author(s):  
Yan Qing Feng ◽  
Zhi Guo Gao ◽  
Fu Ming Wang
Keyword(s):  
Annealing Temperature ◽  
Secondary Recrystallization ◽  
Annealing Process ◽  
Recrystallization Temperature ◽  
Continuous Annealing ◽  
If Steel ◽  
Effect Factor ◽  
Batch Annealing ◽  
Main Effect ◽  
Different Temperatures

Recrystallization law was investigated at different annealing processes. The results showed that the annealing temperature was a main effect factor on the properties of Ti-IF steel. Nominal recrystallization temperature of the samples was evaluated as 620 °C. Simulated batch annealing was performed by two-stage heating. Determined recrystallization temperature was 660 °C, the recrystallization of samples heated at 660 °C was completed in 68min. For 800 °C, the equiaxial recrystallized grains were obtained. Simulated continuous annealing by rapidly heating to different temperatures, samples were held for 100s and then cooled in air. Recrystallization nucleation was not observed until 660 °C. The occurrence of secondary recrystallization was observed at 900 °C.

Microstructure Evolution and Mechanical Properties of 780 MPa Hot Dip Galvanized Dual-Phase Steel

2010 ◽  
Vol 146-147 ◽  
pp. 1331-1335 ◽  
Author(s):  
Guo Bin Li ◽  
Zheng Zhi Zhao ◽  
Di Tang
Keyword(s):  
Mechanical Properties ◽  
Microstructure Evolution ◽  
Dual Phase Steel ◽  
Total Elongation ◽  
Annealing Process ◽  
Continuous Annealing ◽  
Dual Phase ◽  
Dp Steel ◽  
Gleeble 3500 ◽  
Soaking Temperature

The microstructure evolution of 780 MPa hot dip galvanized dual-phase (DP) steel at heating stages of the annealing process was analyzed using a Gleeble−3500 thermal/mechanical simulator. A multifunction continuous annealing simulator was employed to investigate the effect of annealing process on microstructure and mechanical properties of hot dip galvanized DP steel. The experimental results show that ferrite recovery and recrystallization, pearlite dissolution and austenite nucleation and growth take place in the annealing process of hot dip galvanized DP steel. The hardenability can be significantly improved by trace addition of vanadium. When the soaking temperature reaches 780 °C, the tensile strength and total elongation of DP steel can reach 785MPa and 15%, respectively. The microstructure of DP steel mainly consists of a mixture of ferrite and martensite.

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