Steel Rolling Doors and Shutters

1902 ◽  
Vol 34 (2build) ◽  
pp. 40-40
Keyword(s):  
Steel Rolling

scholarly journals Performance Evaluation and Lubrication Mechanism of Water-Based Nanolubricants Containing Nano-TiO2 in Hot Steel Rolling

Lubricants ◽  
2018 ◽  
Vol 6 (3) ◽  
pp. 57 ◽  
Author(s):  
Hui Wu ◽  
Jingwei Zhao ◽  
Liang Luo ◽  
Shuiquan Huang ◽  
Lianzhou Wang ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Lubrication Mechanism ◽  
Nano Tio2 ◽  
Steel Rolling ◽  
Water Based

Investigation of Efficiency of Use of High-Temperature Greases in Steel Rolling - Part 1

2015 ◽  
Vol 806 ◽  
pp. 3-9 ◽  
Author(s):  
Anatoly P. Avdeenko ◽  
Mitar Lutovac ◽  
Svetlana A. Konovalova ◽  
Mykhailo V. Fedorynov
Keyword(s):  
High Temperature ◽  
Medium Temperature ◽  
Friction Coefficients ◽  
Steel Rolling

It has been shown the efficiency of use of high-temperature greases “Natol-H-1(2)” in steel rolling in the result of research of friction coefficients (steel-to-steel) for various rolling pressures on application of greases “Natol”. Medium-temperature putted greases Natol-M-1(2) and pumpable consistent greases “Natol-Р-1(2, 3)” are not suitable for steel rolling. The influence of various components and their percentages in greases on magnitude of friction coefficients was found.

Experimental Investigation Into Improved Wrapper Control of Hot Strip Steel Rolling Mill Downcoilers

2009 ◽  
Author(s):  
D. Ll. Davies ◽  
J. Watton ◽  
Y. Xue ◽  
G. A. Williams
Keyword(s):  
Rolling Mill ◽  
New Technologies ◽  
Position Control ◽  
Steel Production ◽  
Rolling Process ◽  
Steel Rolling ◽  
Hot Strip ◽  
Accurate Position ◽  
Manufacturing Techniques ◽  
Coiling Process

With increasing international competition in steel production mainly from developing nations, it is important for steel plants to keep up to date with new technologies, and continuously improve on current practices and manufacturing techniques to remain competitive. This paper looks specifically at improvements to the hot rolling mill downcoilers, which is where the strip is coiled at the end of the rolling process. Hydraulic and pneumatic technology is combined to give accurate position control of guide wrappers that aid the initial coiling process. The paper presents an experimental test rig, using an actual wrapper guide, constructed to evaluate the specific design approach.

Energy Based Control of Hydraulic Actuators in Steel Rolling Mills

2004 ◽  
Vol 37 (15) ◽  
pp. 29-34 ◽  
Author(s):  
Gemot Grabmair ◽  
Kurt Schlacher ◽  
Georg KeintzeP
Keyword(s):  
Steel Rolling ◽  
Rolling Mills ◽  
Hydraulic Actuators

Study on Dynamic Characteristics of Hydraulic Pressure System of MPM Tube Rolling Mill

2013 ◽  
Vol 706-708 ◽  
pp. 1580-1584
Author(s):  
Gui Hua Fang ◽  
Jian Bo Wang ◽  
Wen Shuai Zheng
Keyword(s):  
Dynamic Characteristics ◽  
Response Speed ◽  
Pipe Production ◽  
Hydraulic Pressure ◽  
Hydraulic Control ◽  
Pressure System ◽  
Steel Rolling ◽  
Hydraulic Servo ◽  
Tube Rolling Mill ◽  
The Impact

Now MPM mill is widely used in hydraulic servo control technology in the field of seamless steel pipe production. But the hydraulic control system has the defect of complex control, bigger load power, more disturbance factors, higher response speed requirement and so on, which are unfavorable for analyzing the impact of factors of steel rolling precision. The conclusions show that: the system model is conducive to the analysis of the factors that affect the rolling accuracy, and it provides a theoretical basis for study the dynamic characteristics of the system, the optimal design and so on.

Crystallographic Texture Control Helps Improve Pipeline Steel Resistance to Hydrogen-Induced Cracking

2010 ◽  
Author(s):  
V. Venegas ◽  
O. Herrera ◽  
F. Caleyo ◽  
J. M. Hallen ◽  
T. Baudin
Keyword(s):  
Grain Boundaries ◽  
Crystallographic Texture ◽  
Pipeline Steel ◽  
Low Carbon Steel ◽  
Rolling Process ◽  
Warm Rolling ◽  
American Petroleum Institute ◽  
Low Carbon ◽  
Steel Rolling ◽  
Hydrogen Induced Cracking

Low-carbon steel specimens, all within API (American Petroleum Institute) specifications, were produced following different thermomechanical paths. After austenization, the samples were rolled and recrystallized. The rolling process was carried out using different reduction-in-thickness degrees and finishing temperatures. The investigated steels showed similar microstructural features but differed considerably in their crystallographic textures and grain boundary distributions. After cathodic hydrogen charging, hydrogen-induced cracking (HIC) was detected in the hot-rolled recrystallized steels, whereas the cold and warm-rolled recrystallized steels proved resistant to this damage. Among the investigated specimens, the HIC-stricken show either the strongest {001}ND texture fiber, the smallest fraction of low-angle grain boundaries, or the weakest {111}ND (γ) texture fiber ({hkl}ND representing crystallographic orientations with {hkl} planes parallel to the steel rolling plane). In contrast, the HIC-resistant steels show the weakest {001}ND texture fiber, the largest fraction of low-angle grain boundaries, and the strongest γ fiber. These results support the hypothesis of this and previous works, that crystallographic texture control, through warm rolling schedules, helps improve pipeline steel resistance to hydrogen-induced cracking.

scholarly journals Electrical Discharges in Oil-Lubricated Rolling Contacts and Their Detection Using Electrostatic Sensing Technique

Sensors ◽  
2022 ◽  
Vol 22 (1) ◽  
pp. 392
Author(s):  
Kamran Esmaeili ◽  
Ling Wang ◽  
Terry J. Harvey ◽  
Neil M. White ◽  
Walter Holweger
Keyword(s):  
High Current Density ◽  
Rolling Contact ◽  
Voltage Measurement ◽  
Electrical Discharges ◽  
Steel Rolling ◽  
Bearing Life ◽  
Wide Range ◽  
Robust Techniques ◽  
Rolling Elements ◽  
Current Densities

The reliability of rolling element bearings has been substantially undermined by the presence of parasitic and stray currents. Electrical discharges can occur between the raceway and the rolling elements and it has been previously shown that these discharges at relatively high current density levels can result in fluting and corrugation damages. Recent publications have shown that for a bearing operating at specific mechanical conditions (load, temperature, speed, and slip), electrical discharges at low current densities (<1 mA/mm2) may substantially reduce bearing life due to the formation of white etching cracks (WECs) in bearing components, often in junction with lubricants. To date, limited studies have been conducted to understand the electrical discharges at relatively low current densities (<1 mA/mm2), partially due to the lack of robust techniques for in-situ quantification of discharges. This study, using voltage measurement and electrostatic sensors, investigates discharges in an oil-lubricated steel-steel rolling contact on a TE74 twin-roller machine under a wide range of electrical and mechanical conditions. The results show that the discharges events between the rollers are influenced by temperature, load, and speed due to changes in the lubricant film thickness and contact area, and the sensors are effective in detecting, characterizing and quantifying the discharges. Hence, these sensors can be effectively used to study the influence of discharges on WEC formation.

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