In-Process Coating Layer Analysis of Galvannealed Steel Sheets with Monochromatic Incident X-Rays

1991 ◽  
Vol 35 (B) ◽  
pp. 1211-1218
Author(s):  
Hiroharu Kato ◽  
Kiyotaka Imai ◽  
Hideya Tanabe
Keyword(s):  
High Speed ◽  
Coating Layer ◽  
Statistical Error ◽  
Optical Systems ◽  
X Rays ◽  
Steel Sheets ◽  
Line Measurement ◽  
On Line ◽  
Coating Weight ◽  
Galvannealed Steel

AbstractA new method, for the on-line determination of the composition and the coating weight of galvannealed (Zn-Fe-alloy-coated) steel sheets using monochromatic incident x-rays with two optical systems, is described. In the case of galvannealed steel sheets, it is difficult to determine the composition and the coating weight precisely by simple XRF, because fluorescent x-rays of Iron are emitted not only from the coating layer but also from the underlying steel sheets. We have developed an on-line analyzer with two optical systems which are different in incident angles, take-off angles and wavelengths of monochromatic incident x-rays. We determine the composition and the coating weight by solving simultaneous equations of the data which we derive using two optical systems. Using monochromatic x-rays enabled us to obtain high precision with high speed. We considered en-or factors in on-line measurement such as statistical error or fluctuation of the distance between the sensor head and steel sheets. This on-line analyzer has been applied to the continuous galvanizing line in our Fukuyama works successfully. As a result, we have been able to significantly improve product quality.

Effect of Coating Layer on Advanced Stud Welding of 2024 Aluminum Alloy to Galvanized and Galvannealed Steel Sheet

2014 ◽  
Vol 794-796 ◽  
pp. 351-356
Author(s):  
Yohei Harada ◽  
Kozo Ishizuka ◽  
Shinji Kumai
Keyword(s):  
Aluminum Alloy ◽  
Steel Sheet ◽  
Coating Layer ◽  
Fracture Load ◽  
Tensile Fracture ◽  
2024 Aluminum Alloy ◽  
Steel Sheets ◽  
Sheet Surface ◽  
Stud Welding ◽  
Galvannealed Steel

High strength 2024 aluminum alloy studs were joined to galvanized, galvannealed and non-coated steel sheets by using an advanced stud welding method. Effect of the coating layer on the interfacial microstructure and the tensile fracture load of the joints were evaluated. A specially-designed stud having a circular projection at its bottom was pressed against a sheet surface. A discharge current was introduced from the upper part of the stud. Local heating could be achieved by a high current density at a contact point between the projection and sheet. The observation of joint area revealed the projection was severely deformed and spread along the sheet surface. The coating layer of the galvanized steel sheet was removed at the joint interface under the charging voltage of 200 V, while that of the galvannealed one locally remained on the steel surface even at 400 V. This would be strongly related to the melting or liquidus and solidus temperatures of each coating layer. Joining was not achieved at a low charging voltage in the non-coated and galvannealed steel sheets, while high tensile fracture load was obtained even at 200 V in the galvanized ones.

On-Line Measurement of Fiber Temperature in the Melt-Spinning Processes

2013 ◽  
Vol 821-822 ◽  
pp. 149-152
Author(s):  
Xin Wen ◽  
Sheng Lin Yang ◽  
Guang Li
Keyword(s):  
High Speed ◽  
Melt Spinning ◽  
Probe Field ◽  
Infrared Thermometer ◽  
Line Measurement ◽  
Measurement Results ◽  
On Line ◽  
Important Means ◽  
Method Of Measurement ◽  
Reliable Temperature

The online temperature detections of fiber along the spinning line should be the important means for the precise controlling of fiber higher order structures as well as fiber-final performance. In this paper, a method of measurement fiber temperature has been introduced which mainly use the instrument of monochromatic infrared thermometer to measure fiber temperature in the melt-spinning processes. Due to the probe field of view of monochromatic infrared thermometer being much larger than the fiber diameter, monochrome infrared thermometers can't be used to measure temperature of fibers directly, the measurement results is an average between the fiber and backgrounds, which can't be used to indicate the temperature of fibers directly and have to calibrated. The calibrated results of monochromatic infrared thermometer are compared to the measurement results of infrared thermography. It has been found that the on-line measurement with infrared thermometer could promise high-speed and highly reliable temperature testing for the fibers.

On-Line Paint Coating Weight Gauge Using Compton Scattered X-Rays

1992 ◽  
Vol 36 ◽  
pp. 111-120
Author(s):  
Naoki Matsuura ◽  
Shigetoshi Kurozumi ◽  
Tatsuo Fukuzaki ◽  
Tomoya Arai
Keyword(s):  
Laboratory Experiments ◽  
Zinc Coating ◽  
Fluorescence Analysis ◽  
Industrial Applications ◽  
Galvanized Steel ◽  
Coating Film ◽  
X Rays ◽  
X Ray ◽  
On Line ◽  
Coating Weight

Coating weight measurements by X-ray fluorescence analysis have been well established technology in industrial applications. The coating film measurements such as tin-plated steel and galvanized steel are carried out with an on-line gauge which is based on laboratory experiments. The approximate sample speed is 200m/min for a tin plate gauge, 150m/min for galvanized steel and 100m/min for electrolytic zinc coating steel.

On-Line Measurement of Fiber Diameters along Spinning Line

2013 ◽  
Vol 333-335 ◽  
pp. 394-399
Author(s):  
Xin Wen ◽  
Sheng Lin Yang ◽  
Guang Li
Keyword(s):  
High Speed ◽  
Polypropylene Fibers ◽  
Laser Sensor ◽  
Measurement Equipment ◽  
Diameter Measurement ◽  
Analog Signals ◽  
Line Measurement ◽  
Typical Experiment ◽  
On Line ◽  
Spinning Speed

A laser sensor based equipment was assembled for on-line measuring the fiber diameters during the polymer spinning. The analog signals come from laser sensor were detected by using a data acquisition instrument and transferred into digital ones, which were processed in time with Labview. In a typical experiment, the diameters of polypropylene fibers were tested under different spinning speed by means of that pre-calibrated on-line measurement equipment, and the testing results were compared with those obtained from the numerical simulation of spinning dynamics. It has been found the on-line diameter measurement could promise high-speed, highly reliable and flexible testing.

scholarly journals Analysis of Light Reflection from Cold-rolled Steel Sheets and Its Application to On-line Measurement of Surface Roughness

1984 ◽  
Vol 70 (9) ◽  
pp. 1095-1102 ◽  
Author(s):  
Yuichiro ASANO ◽  
Motoji SHIOZUMI ◽  
Kunio KURITA ◽  
Tadashi YABE ◽  
Susumu MORIYA
Keyword(s):  
Surface Roughness ◽  
Light Reflection ◽  
Rolled Steel ◽  
Cold Rolled Steel ◽  
Steel Sheets ◽  
Line Measurement ◽  
On Line ◽  
Cold Rolled
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