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.

Structural Changes of UHV Deposited Titanium Thin Films in Presence of Oxygen Flow and Temperature

2011 ◽  
Vol 110-116 ◽  
pp. 1094-1098
Author(s):  
Haleh Kangarlou ◽  
Mehdi Bahrami Gharahasanloo ◽  
Akbar Abdi Saray ◽  
Reza Mohammadi Gharabagh
Keyword(s):  
Room Temperature ◽  
Structural Changes ◽  
Annealing Temperature ◽  
Annealing Process ◽  
Oxygen Flow ◽  
Glass Substrates ◽  
Annealing Temperatures ◽  
Titanium Thin Films ◽  
Deposition Angle ◽  
Ti Films

Ti films of same thickness, and near normal deposition angle, and same deposition rate were deposited on glass substrates, at room temperature, under UHV conditions. Different annealing temperatures as 393K, 493K and 593K with uniform 8 cm3/sec, oxygen flow, were used for producing titanium oxide layers. Their nanostructures were determined by AFM and XRD methods. Roughness of the films changed due to annealing process. The gettering property of Ti and annealing temperature can play an important role in the nanostructure of the films.

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.

Effect of Annealing Temperature on Dislocation Loop Absorption And Evolution in Fe by Molecular Dynamics Study

2021 ◽  
Author(s):  
Pandong Lin ◽  
Junfeng Nie ◽  
Meidan Liu
Keyword(s):  
Molecular Dynamics ◽  
Dislocation Loop ◽  
Room Temperature ◽  
Annealing Temperature ◽  
Annealing Process ◽  
Basic Material ◽  
Absorption Process ◽  
Annealing Rate ◽  
Dynamics Method ◽  
Reactor Pressure

Abstract As the basic material in reactor pressure vessel (RPV), Fe endures amounts of irradiation in the entire lifetime. Many irradiation defects such as dislocation loop are generated which affect the macroscopic mechanical properties. In this paper, we use the molecular dynamics method to investigate the effect of annealing temperature on dislocation loop absorption and evolution. The annealing process contains four steps: At first, the temperature increases from room temperature (300K) to annealing temperature. The annealing temperature is set as 600K, 700K, 800K, 900K and 1000K respectively. Then the system maintains at annealing temperature for adequate time to evolve. After that, the temperature recovers to room temperature. Finally, the system evolves at room temperature to get the final configuration. The diameters of 1/2 &lt;111&gt; and &lt;100&gt; dislocation loop are 5.1 nm and 1.2 nm, respectively. The dimension of simulation cell is defined as 29.6nm × 20.2nm × 21.0nm with 1080455 atoms. Based on annealing simulation, we could obtain and analyze the microstructure evolution of dislocation loop. Apart from that, we also investigate the effect of annealing rate (4.29 K/ps, 6.00 K/ps, 10.00 K/ps and 30.00 K/ps) on the number of defect atoms and dislocation length during annealing process. Here under periodic boundary conditions the system is allowed to relax in all three directions independently. Results show that temperature has significant impact on the absorption and evolution of dislocation loop. However, temperature can improve the maximum values of defect atoms and accelerate absorption process from stage II to stage I when temperature is 900 K and 1000 K. In contrast, annealing rate has negligible impact on whether the number of defect atoms or dislocation length during the absorption and evolution of dislocation loop. These results are meaning for understanding the temperature effect on dislocation loop.

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.

Annealing Effect on the Thermoelectric Properties of Hot Extruded Bi2(Te0.94Se0.06)3+0.07wt%I+0.03wt%CuBr+0.02wt%Te Compound

2006 ◽  
Vol 15-17 ◽  
pp. 404-409
Author(s):  
Wang Kee Min ◽  
Sung Doo Hwang ◽  
Chang Ho Lee ◽  
Young Do Park ◽  
Yang Do Kim ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
Figure Of Merit ◽  
Room Temperature ◽  
Annealing Temperature ◽  
Raw Materials ◽  
Extrusion Process ◽  
Annealing Process ◽  
Annealing Effect ◽  
Z Value

The n-type Bi2(Te0.94Se0.06)3 thermoelectric compound was prepared by the direct extrusion process using the powder as raw materials. Hot extruded specimens were annealed at 200°C and 350°C for 2hrs. The electrical conductivity, thermoelectric power and thermal conductivity of hot extruded and annealed specimens were measured at room temperature. The fractographs of the specimens showed that the grain size became coarser and a lot of porosities were generated during annealing process. The power factor value (PF) decreased with increasing the annealing temperature. The electric conductivity and thermal conductivity of the specimens also decreased with the increase of annealing temperature. This may be reasoned that the generated porosities affect the thermal conductivity of the specimens prepared in this study. The figure of merit (Z) value of the annealed specimens at 350°C was improved about 10%. The highest Z value of the specimens annealed at 350°C was 2.0 x 10-3/K among the prepared specimens.

Effect of Different Annealing Process for Microstructure and Properties of 1200MPa HSLA Steel

2015 ◽  
Vol 713-715 ◽  
pp. 2653-2657
Author(s):  
Yu Pei ◽  
Zhe Gao ◽  
Yi Liu ◽  
Shi Qian Zhao ◽  
Chang Yu Xu ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Room Temperature ◽  
Annealing Temperature ◽  
Hsla Steel ◽  
High Strength ◽  
Annealing Process ◽  
Air Cooling ◽  
Low Carbon ◽  
Slow Cooling ◽  
Microstructure And Properties

For C-Si-Mn low carbon HSLA(High Strength Low Alloyed) steel, the influence of microstructure and properties were researched on the different annealing processes. The result showed that the microstructure at room temperature of the steel were polygonal ferrite, island martensite and punctate bainite. With the increase of the annealing temperature, the content of martensite and bainiteincreased and the content of ferrite decreased. Accordingly, tensile strengthincreased from 1069MPa to 1498MPa, and the elongation decreased from 13.8% to 5.1%. With the increase of the overaging temperature, tensile strength decreased from 1315MPa to 1152MPa, and the elongationincreased from8.5% to9.8%. Finally, the optimum annealing process obtained that the annealing temperature was 820°C for 80s, slow cooling to 680°C, water quenching to room temperature, the overaging temperature was 280°C for 300s and air cooling to room temperature. The material obtained higher tensile strength and better elongation.

Diffusional Analysis in Al-Ni Cold Rolled Strip during Annealing Process

2012 ◽  
Vol 487 ◽  
pp. 710-713
Author(s):  
Guo Hui Zhu ◽  
Feng Li Sui ◽  
Qi Wei Chen
Keyword(s):  
Solid Solution ◽  
Annealing Temperature ◽  
Annealing Process ◽  
Rolled Strip ◽  
Diffusion Annealing ◽  
Diffusion Layers ◽  
Diffusion Speed ◽  
Cold Rolled ◽  
Annealing Experiments

Diffusion annealing experiments in Al-Ni cold rolled strip was conducted in nitrogen protection. The characterization of diffusion layers between pure Al and pure Ni metals has been analyzed. The analysis results show that the diffusion layers would be composed of solid-solution of Al in Ni marked as Ni (Al), Ni3Al and Ni5Al3 compounds. During diffusion processing, the diffusion speed of Al to Ni was faster than that of Ni to Al. This implied a possibility to form chemical connection of Al-Ni by solid-solution without intermetallic compounds formation to obtain good mechanical and electric properties through optimizing annealing temperature and holding time.

Comprised of the Organization and Performance of Non-Oriented Electrical Steel with Cold and Heat Slab

2016 ◽  
Vol 852 ◽  
pp. 181-186
Author(s):  
Tie Ye ◽  
Zhen Yu Gao ◽  
Zhi Wen Lu ◽  
Zhi Guo Zhong
Keyword(s):  
Grain Size ◽  
Magnetic Properties ◽  
Cold Rolling ◽  
Electrical Steel ◽  
Annealing Process ◽  
Rolled Plate ◽  
Continuous Annealing ◽  
Production Test ◽  
Second Phase ◽  
Hot Rolled

The structure, texture, second phase and magnetic properties of non-oriented electrical steel with cold and heat slab were comprised through the production test. The research result shows that the grain size of hot rolled plate by cold slab is less than that of hot rolled plate by hot slab. But after cold rolling and annealing process, the grain size is consistent. Microstructure of hot rolled coil is recrystallized microstructure and the dispersion degree of texture orientation is high. Deformation makes the texture enhancement in cold rolling which become the strong texture based on {001} {111} and <110> texture. The Ti element has aggregation which can form hard impurities as TiN and TiSN to obstruct the recrystallization. Micro fine TiC formed in the annealing process which would block magnetic domain movement and reduce the magnetic properties of the product. MnS is precipitated impurities and the coarsening of MnS phase can reduce the domain block by improving the continuous annealing temperature and the magnetic field would be optimization.

Effect of Rolling on Microstructure and Room Temperature Tensile Properties of Newly Developed Mg-4Li-1Ca Alloy

2014 ◽  
Vol 922 ◽  
pp. 537-542 ◽  
Author(s):  
Saurabh Nene ◽  
Bhagwati Prasad Kashyap ◽  
Nityanand Prabhu ◽  
T. Al-Samman ◽  
Yuri Estrin
Keyword(s):  
Tensile Strength ◽  
Room Temperature ◽  
Tensile Elongation ◽  
Rolled Plate ◽  
Thick Sheet ◽  
Cast Material ◽  
Average Grain Size ◽  
Master Alloys ◽  
Rolled Condition ◽  
Hot Rolled

Mg-30Ca and Mg-14Li (wt %) master alloys were melted successively in the induction furnace to obtain a Mg-Li-Ca ternary alloy containing 3.99 % Li and 1 % Ca. The as-cast material of thickness 4 mm was homogenised at 350° C for 120 mins and subsequently rolled to 62.5 % reduction in thickness at 300 °C to get 1.5 mm thick sheet. The microstructures of hot rolled samples were examined in as-rolled condition as well as after annealing at 350° C for various lengths of time. The presence of deformation twins was clearly seen in the as-rolled structure, whereas equiaxed twin-free grains were observed in the annealed condition. The average grain size was found to increase from 10 μm to 18 μm by annealing, according to the kinetics that follows a parabolic law. Tensile samples taken from rolled plate were deformed to failure at room temperature and a strain rate of 10-4 s-1. Ultimate tensile strength of as-rolled material increased to 213 MPa, while tensile elongation dropped to 6.5 % from the initial values of 134 MPa and 8.5 %, respectively. Annealing after rolling offered a good compromise between the enhanced tensile strength (160 MPa) and tensile ductility (9 %) suggesting viability of the proposed thermomechanical treatment as a means for enhancing both strength and ductility of Mg-4Li-1Ca alloy.

Rapid Thermal Annealing of Al and P Implanted Single Crystal Beta Silicon Carbide Thin Films

1985 ◽  
Vol 52 ◽  
Author(s):  
J. A. Edmond ◽  
H. J. Kim ◽  
R. F. Davis
Keyword(s):  
Thin Films ◽  
Thermal Annealing ◽  
Rapid Thermal Annealing ◽  
Room Temperature ◽  
Annealing Temperature ◽  
Compound Semiconductors ◽  
Annealing Process ◽  
Capacitance Voltage ◽  
P Type ◽  
Sic Films

ABSTRACTIon implantation of 27Al+ and 31p+ ions into monocrystalline s-SiC films was conducted in order to acquire p-type and n-type conducting layers, respectively. Implant energies ranging from 110 to 190 keV and fluences from 7 × 1013 to 9 × 1014 cm-2 were used. In order to activate each dopant specie, rapid thermal annealing (RTA) was employed. A decrease in sheet resistance with increasing annealing temperature for both type layers was observed up to 1800°C. After annealing at this highest temperature for 300 s in 1 atm. Ar, the percent of activated and ionized n-type and p-type dopant was ≅20% and ≅0.5%, respectively, as determined by room temperature capacitance-voltage measurements. Recrystallization of both heavily damaged and amorphized layers occurred as a result of the use of the aforementioned annealing process. Unlike SPE regrowth in other compound semiconductors, no microtwins were present in the regrown bulk as observed by XTEM. SIMS analyses also showed that there was essentially no redistribution of P and moderate redistribution of Al from the corresponding as-implanted profiles after annealing.

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