Structure formation during recrystallization of cold-rolled sheet steel 06Kh18ch

1985 ◽  
Vol 27 (9) ◽  
pp. 685-688
Author(s):  
A. N. Babitskaya ◽  
V. G. Mishchenko ◽  
V. S. Movshovich
Keyword(s):  
Structure Formation ◽  
Sheet Steel ◽  
Rolled Sheet ◽  
Cold Rolled

scholarly journals Formable Cold Rolled Sheet Steel with Ultra-High Lankford Value by Elevating {111} Intensity Extremely.

1992 ◽  
Vol 31 (6) ◽  
pp. 535-537 ◽  
Author(s):  
Kazuo Koyama ◽  
Yoshikazu Matsumura ◽  
Shiroh Sanagi ◽  
Nobuhiko Matsuzu ◽  
Nobuyuki Kino
Keyword(s):  
Sheet Steel ◽  
Rolled Sheet ◽  
Cold Rolled

On the disappearance of fine, disc-like features from thin foils of steel

1991 ◽  
Vol 49 ◽  
pp. 608-609
Author(s):  
S. W. Thompson
Keyword(s):  
Room Temperature ◽  
Sheet Steel ◽  
Rolled Sheet ◽  
Steel Company ◽  
Thin Foils ◽  
Transmission Electron ◽  
Fine Carbide ◽  
Iced Water ◽  
Cold Rolled ◽  
Carbide Particles

Fine carbide particles form in quenched-and-aged specimens of iron containing a small amount of carbon. Similar precipitation occurs in ferrite grains within dual-phase steels. The particles have been described as discs or loops, typically about 20 run in diameter and 2 nm thick, which lie on ﹛100﹜ planes within ferrite grains. The precipitates are believed to form in association with vacancies and produce increases in hardness and yield strength. Two studies showed that these features disappeared after heating specimens in the transmission electron microscope (TEM), and this note reports further on this phenomenon.Continuously annealed and cold-rolled sheet steel (provided by Inland Steel Company) contained (in wt pet) 0.087 C, 0.97 Mn, 0.27 Si, 0.034 Al, 0.008 S, and 0.005 N. Specimens were intercritically annealed at 770°C for five minutes and quenched in iced water. Tensile testing was conducted within one day of heat treatment, and then specimens were stored at room temperature for about six months. Thin foils were produced by conventional thinning methods and jet polished at 75 V and 80 mA in an electrolyte containing 95% acetic acid and 5% perchloric acid. Specimens were examined in a Philips EM400 operated at 120 kV.

Continuous Cooling Transformation Behavior of High Strength Low-Alloyed Cold Rolled Sheet Steel

2007 ◽  
Vol 26-28 ◽  
pp. 27-31 ◽  
Author(s):  
Hao Liu ◽  
Ding Zhong Zhong ◽  
Long Qi Zhao ◽  
Tao Peng ◽  
Li Xin Wu ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Sheet Steel ◽  
High Strength ◽  
Deformation Condition ◽  
Rolled Sheet ◽  
Transformation Temperatures ◽  
Continuous Cooling Transformation ◽  
Continuous Cooling ◽  
Critical Phase ◽  
Cold Rolled

The dilatometry curves and the critical phase transformation temperatures of high strength low-alloyed (HSLA) cold rolled sheet steel were determined by thermal simulation test machine. The samples were austenitized at 900°C,deformed at 40% of deformation and cooled at different rates of 0.1°C/s~ 60°C/s. The continuous cooling transformation (CCT) diagram under deformation condition can be drawn. The results showed that the critical phase transformation temperatures are as follows: Ac3=900°C, Ac1=735°C, Ar3=825°C, Ar1=695°C. A few amount of martensite in high strength low-alloyed cold rolled steel can be obtained at the cooling rate of 60°C/s. The experimental data provide the technical references for rolling control, cooling control and heat treatment in real production.

scholarly journals Formable Cold Rolled Sheet Steel with Ultra-High Lankford Value by Lubricant Hot Rolling in Ferrite Region.

Materia Japan ◽  
1997 ◽  
Vol 36 (4) ◽  
pp. 376-378 ◽  
Author(s):  
Kei Sakata ◽  
Saiji Matsuoka ◽  
Takashi Obara ◽  
Kozo Tsunoyama ◽  
Masaji Shiraishi
Keyword(s):  
Hot Rolling ◽  
Sheet Steel ◽  
Rolled Sheet ◽  
Cold Rolled ◽  
Ferrite Region

scholarly journals Texture Distributions Through the Thickness of an ELC-BH Sheet With Very High r¯-Value Produced by a New Technology

1998 ◽  
Vol 30 (3-4) ◽  
pp. 229-245
Author(s):  
Xiaojun Guan ◽  
Jiajuan Zhou ◽  
Xiaojun Hu ◽  
Qiulin Wu
Keyword(s):  
New Technology ◽  
Sheet Steel ◽  
High Strength ◽  
Fiber Axis ◽  
Rolled Sheet ◽  
Low Carbon ◽  
Annealing Texture ◽  
Cold Rolling And Annealing ◽  
Cold Rolled ◽  
Very High

Effects of a new technology which made r¯-value increase remarkably on the distributions of the cold rolling and annealing textures through the thickness of an extra low-carbon and high strength bake-hardening sheet steel have been researched by means of the method of ODF. The results are expressed as follows: (1) γ-fiber axis texture in the ELC-BH sheet obtained by the new technology develops so strongly and purely, especially within the sheet. This is the essential cause why r¯-value of the sheet remarkably increases. (2) The very strong γ-fiber axis texture of being completely different from conventional one is closely related to the cold rolled sheet supplied by the new technology which benefits to develop {111} annealing texture strongly. The inside of the cold rolled sheet is far more favorable than its surface to the development of the γ-fiber axis texture.

How the Material Thickness Affects 0.08% Carbon Cold-Rolled Sheet Steel

2020 ◽  
Vol 299 ◽  
pp. 409-417
Author(s):  
Vladislav B. Beluosov ◽  
Sergey A. Tipalin ◽  
Yili G. Kalpin
Keyword(s):  
Comparative Analysis ◽  
Material Properties ◽  
Deformation Process ◽  
Tensile Strain ◽  
Sheet Steel ◽  
Rolled Sheet ◽  
Software Simulation ◽  
Material Thickness ◽  
Cold Rolled ◽  
Hardening Curve

The authors hereof have studied how the thickness of 0.08% carbon cold-rolled sheet steel affects its properties. They experimented with tensioning such sheets and plotted the metal hardening curves. The paper presents comparative analysis of how the material thickness affects the coefficients approximating the hardening curves. A comparison of the hardening curves of control and annealed specimens is given. Experiments have identified the effects that the pre-accumulated plastic strain has on the material properties. It is revealed that lower thickness alters the force parameters of the process and affects the ultimate tensile strain. The paper formulates recommendations on using the estimates obtained by the software simulation of the deformation process. Hardening-curve coefficients approximation functions are proposed in order to predict how changing the thickness would affect the material properties.

scholarly journals In-plane Biaxial Compression Test on 780MPa Cold Rolled Sheet Steel

2020 ◽  
Vol 47 ◽  
pp. 1429-1433
Author(s):  
Yuki Ogihara ◽  
Toru Minote ◽  
Akinobu Ishiwatari ◽  
Yoshikiyo Tamai
Keyword(s):  
Compression Test ◽  
Sheet Steel ◽  
Biaxial Compression ◽  
Rolled Sheet ◽  
Cold Rolled

α→γ→α Transformation Texture Formation at Cold-Rolled Ultra Low Carbon Steel Surfaces

2005 ◽  
Vol 495-497 ◽  
pp. 1267-1272 ◽  
Author(s):  
Naoki Yoshinaga ◽  
Leo Kestens ◽  
Bruno C. De Cooman
Keyword(s):  
Carbon Steel ◽  
Surface Texture ◽  
Alternative Hypothesis ◽  
Sheet Steel ◽  
Low Carbon Steel ◽  
Rolled Sheet ◽  
Texture Formation ◽  
Low Carbon ◽  
Ultra Low Carbon Steel ◽  
Cold Rolled

The influence of Mn on the surface texture formation through a®g®a transformation was investigated. After the a®g®a transformation, a weak texture was formed at the surface of ultra low carbon cold-rolled sheet steel without Mn. In contrast, a sharp <100>//ND cube texture was observed in Mn alloyed ultra low carbon steel. In order to interpret the effect of Mn two alternative mechanisms were considered : (i) one assumption attributes the occurrence of the specific surface texture to the effect of outer-surface energy (ii) and according to an alternative hypothesis the release of elastic work parallel to ND in the surface area is responsible for the observed <100>//ND surface texture.

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