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.

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.

Multiphase Steels: Structure-Mechanical Properties Relationships in the Cold Rolled and Continuous Annealed Condition

2005 ◽  
Vol 500-501 ◽  
pp. 429-436 ◽  
Author(s):  
J.I. Verdeja ◽  
J.A. Pero-Sanz ◽  
J. Asensio
Keyword(s):  
Mechanical Properties ◽  
Annealing Process ◽  
Continuous Annealing ◽  
Microstructural Properties ◽  
Annealed Condition ◽  
Batch Annealing ◽  
Cold Rolled ◽  
Process Line ◽  
Mechanical And Microstructural Properties ◽  
Multiphase Steels

The present work describes the correlation between the microstructure and the mechanical properties of multiphase steels processed through a Continuous Annealing Process Line (CAPL). The mechanical and microstructural properties of one of the former experimental steel compositions was also processed via Batch Annealing (BA) and the results have been included for comparison reasons.

A Quantitative Study of Precipitation Evolution during Annealing Treatments of a Ti-IF Steel

2011 ◽  
Vol 228-229 ◽  
pp. 1156-1162
Author(s):  
Guo Ming Zhu ◽  
Chao Lu ◽  
Yong Lin Kang ◽  
Lu Feng Gao
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Annealing Temperature ◽  
Annealing Process ◽  
Continuous Annealing ◽  
If Steel ◽  
Batch Annealing ◽  
Tic Particle ◽  
Evolution Of Precipitates

The evolution of precipitates size distribution of Ti-IF steel during annealing process has been investigated by simulating different continuous annealing (CA) and batch annealing (BA) treatments. The size and distributions of the precipitates (TiC in particular) are obtained by TEM observation and measured image analysis. They are then fitted by log-normally distribution and a model demonstrating the relationships of particle size distribution with annealing process parameters has been developed and validated by experiment results. The fine TiC precipitates (< 30 nm) vary after different annealing treatments. The effects of annealing temperature and holding time on the evolution of TiC particle size distribution are discussed.

Effect of the Continuous Annealing Process on Microstructure and Mechanical Properties of DP590 Steel

2013 ◽  
Vol 395-396 ◽  
pp. 313-317 ◽  
Author(s):  
Hong Bin Wang ◽  
Rui Xing ◽  
Yi Yao Yu ◽  
Ji Guang Li ◽  
Ji Hong Yang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Annealing Temperature ◽  
Annealing Process ◽  
Continuous Annealing ◽  
Martensite Content ◽  
Microstructure And Mechanical Properties ◽  
Cold Rolled

The microstructure and mechanical properties of the continuous annealing DP590 steel produced by a cold rolled plant were studied by utilizing a Gleeble thermal simulator tested machine. The results show that, increasing annealing temperature can not effectively improve the martensite content in the steel and annealing temperature be set at 780 °C and 800 °C is rational. Martensite decomposition at high overaging temperature will decrease tensile strength of the samples. As the overaging temperature sets at 250 °C ~ 300 °C, the samples could achieve tensile strength more than 600 MPa, which meet the requirements of DP590.

Effect of Intercritical Annealing Temperature on Development of Cold Rolled Dual Phase Steel from Q345 Steel

2013 ◽  
Vol 313-314 ◽  
pp. 693-696
Author(s):  
Ji Yuan Liu ◽  
Fu Xian Zhu ◽  
Shi Cheng Ma
Keyword(s):  
Dual Phase Steel ◽  
Annealing Temperature ◽  
Simulation Experiment ◽  
Intercritical Annealing ◽  
Continuous Annealing ◽  
Dual Phase ◽  
Automotive Applications ◽  
Treatment Procedure ◽  
Annealing Temperatures ◽  
Cold Rolled

Cold rolled dual phase steel was developed from Q345 steel by heat treatment procedure for automotive applications. The ultimate tensile strength was improved about 100MPa higher than the traditional cold-rolled Q345 steel in the continuous annealing simulation experiment. The microstructure presented varied characteristics in different intercritical annealing temperatures; mechanical properties were changed correspondingly as well. The chief discussions are focus on the recrystallization, hardenability of austenite and martensite transformation in the experiment.

Effect of Annealing on Mechanical Properties of Copper Alloys Deformed at Cryogenic Temperature

2013 ◽  
Vol 745-746 ◽  
pp. 363-370 ◽  
Author(s):  
Xiao Xiang Wu ◽  
Yu Lan Gong ◽  
Shi Ying Ren ◽  
Jing Mei Tao ◽  
Yan Long ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Annealing Temperature ◽  
Uniform Elongation ◽  
Copper Alloys ◽  
Annealing Treatment ◽  
Annealing Process ◽  
Optimal Annealing Temperature ◽  
Elongation To Failure ◽  
Cold Rolled ◽  
Zn Alloys

The effect of annealing treatment on the mechanical properties and microstructure of cold-rolled Cu-20% Zn alloys was investigated in this work. Mechanical properties changed dramatically with the increase of temperature. According to the microhardness test, it can roughly concluded that 150 is the optimal annealing temperature for deformation, at which a uniform elongation increased from 1.4658% before annealing to about 6.89%, and the elongation to failure increased from 7.426% to 16.81% with the same strength almost retained. The changes of microstructure during the annealing process are mainly distributed to the improvement of mechanical properties.

Study on Direct Annealing Process of Hot-Rolled Plate

2011 ◽  
Vol 306-307 ◽  
pp. 535-538 ◽  
Author(s):  
Sheng Li Li ◽  
Xing Dong Peng ◽  
Yu Chen
Keyword(s):  
Room Temperature ◽  
Annealing Temperature ◽  
Annealing Process ◽  
Steel Grade ◽  
Rolled Plate ◽  
Measuring Instrument ◽  
R Value ◽  
Hot Rolled ◽  
Annealing Experiments ◽  
Room Temperature Tensile Test

To study the transmutation of organization and texture on direct annealing process of hot-rolled plate. Different annealing experiments were done in the lab. The annealed samples are from steel grade of SPHC. To check the organization of the annealed samples by optical microscopy, to measure grain size by Micro-image Analysis & process software. To measure the mechanical properties by the room temperature tensile test. To check AlN by TEM and EDX.To measure texture by texture measuring instrument, and the data was collected on a computer, using two-step calculation of ODF, measured with constant 45° section of graph. When annealing temperature of the samples reaches 875 °C or more, a relatively low strength , high n value, and high r value is received, but if the holding time is longer, grain coarsening occurs at the time,so the annealing temperature is not more than 925°C.When annealing temperature reaches 875 °C, AlN increased slightly, and the texture is not obvious.

scholarly journals Influence of Continuous Annealing Temperature on Mechanical Properties and Texture of Battery Shell Steel

Metals ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 52 ◽  
Author(s):  
Beijia Ning ◽  
Zhengzhi Zhao ◽  
Zhiying Mo ◽  
Hong Wu ◽  
Chong Peng ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Annealing Temperature ◽  
Electron Backscatter Diffraction ◽  
Continuous Annealing ◽  
Normal Anisotropy ◽  
Fracture Elongation ◽  
Anisotropy Index ◽  
R Value ◽  
Backscatter Diffraction ◽  
Annealing Experiments

To study the influences of continuous annealing temperature on microstructure, mechanical properties and textures of battery shell steel, continuous annealing experiments were conducted at 710 °C, 730 °C, 760 °C and 780 °C respectively. The mechanical properties and normal anisotropy index (r) were measured by tensile test and the textures were investigated using the method of electron backscatter diffraction (EBSD). The results show that as annealing temperature rose, the grain size, fracture elongation and r value increased, whereas the strength and yield ratio decreased. The yield strength was 122 MPa, the tensile strength was 286 MPa, meanwhile the elongation and r value arrived at 38.8% and 2.3 when the annealing temperature rose to 780 °C. After annealing, the main texture in battery shell steel is {111} <112>, followed by {111} <110>. With the increase of annealing temperature, textures in {001} crystallographic plane weakened while textures in {111} plane strengthened, which is beneficial to the deep drawability of the steel.

scholarly journals Factors Affecting the Mechanical Properties Variation after Annealing Of Cold Rolled Steel Sheet

2019 ◽  
Vol 95 ◽  
pp. 04003
Author(s):  
Ruangyot Wichienrak ◽  
Somchai Puajindanetr
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Yield Strength ◽  
Steel Sheet ◽  
Annealing Temperature ◽  
Rolled Steel ◽  
Soaking Time ◽  
Cold Rolled Steel ◽  
Batch Annealing ◽  
Cold Rolled

Cold rolled steel industry in type of batch annealing furnace, the mechanical properties of steel sheet have variation by each position. The parameters of annealing temperature and time were analysed to work out the source of mechanical properties variation. This experiment is using low-carbon steel sheet that were cold rolled at the same reduction ratio. Then annealed applying by different annealing temperature and soaking time in laboratory furnace. The mechanical properties which were examined. Yield strength, Tensile strength, %Elongation and Hardness. The result showed that (1) Increasing the annealing temperature could remarkably decrease the yield strength, tensile strength and hardness, whereas the %Elongation could be increased. (2) Increasing the soaking time could slightly effect on mechanical properties. (3) The annealing temperature of 650°C with soaking time of 2 hr should be applied to provide the mechanical properties close to target value (4) Grain size of the workpieces trended to be grown from the annealing temperature of 610°C.The experiment it can be concluded that annealing temperature and soaking time have significant effect on the mechanical properties variation in batch annealing.

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