A Study of High-Temperature Imperfections Detected on Light-Gauge Coated Sheet Steel

2019 ◽  
Author(s):  
A. Bader ◽  
D. Pole ◽  
C. DeMark ◽  
M. Roach ◽  
J. Dyar ◽  
...  
Keyword(s):  
High Temperature ◽  
Sheet Steel ◽  
Coated Sheet

Electro-Spark Deposition of Composite TiB2-TiC on Electrodes’ Surface

2012 ◽  
Vol 602-604 ◽  
pp. 1680-1684
Author(s):  
Fen Fang Tan ◽  
Luo Ping ◽  
Zhi Xiong Xie
Keyword(s):  
High Temperature ◽  
Composite Coating ◽  
Resistance Spot Welding ◽  
Spot Welding ◽  
Coating Layer ◽  
Sheet Steel ◽  
Resistance Spot ◽  
Copper Electrodes ◽  
Coating Time ◽  
Coated Sheet

In order to improve the defects of multi-layer Ni/(TiCP/Ni)/Ni composite coating and only TiB2 layer.TiB2-TiC composite coating is a good way. Because TiB2-TiC composite coating layer has well stability in high temperature conditions, high conductivity and TiB2-TiC composite coating layer has better wetting with the surface of copper electrodes in resistance spot welding of Zn-coated sheet steel. The TiB2-TiC composite coating electrodes were investigated by electronic balance, SEM, and microscope during different coating parameters. The best coating parameters include：coating voltage is 24V、coating capacitance is 3000μf、coating time about 2~3 minutes.

WEIRKOTE PLUS

Alloy Digest ◽  
1987 ◽  
Vol 36 (6) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Aluminum Alloy ◽  
Carbon Steel ◽  
Physical Properties ◽  
Deep Drawing ◽  
Sheet Steel ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
Steel Corp ◽  
Coated Sheet

Abstract WEIRKOTE PLUS is a Galfan-coated sheet steel. The sheet is conventional low-carbon steel normally used for galvanized sheets and strip. This digest will concentrate on the characteristics and properties of the Galfan coating which is nominally a 95% zinc-5% aluminum alloy. The coating on Weirkote Plus is ideal for a variety of tough applications. It is excellent for products that require deep drawing and it combines extra corrosion resistance with superior formability. This datasheet provides information on composition and physical properties. It also includes information on corrosion resistance as well as forming, joining, and surface treatment. Filing Code: Zn-41. Producer or source: Weirton Steel Corp.

HIGH TEMPERATURE CORROSION OF THIN SHEET STEEL 08KP IN AIR

2021 ◽  
Vol 11 (2) ◽  
pp. 48-55
Author(s):  
Nikolay M. BOCHAROV
Keyword(s):  
Thermal Analysis ◽  
High Temperature ◽  
Elevated Temperatures ◽  
Sheet Steel ◽  
Thin Sheet ◽  
High Temperature Corrosion ◽  
Metal Base ◽  
Processing Modes ◽  
Temperature Time ◽  
Thin Sheet Steel

The study of the nature of high-temperature corrosion of metals is one of the tasks in substantiating the relevance of the use of corrosion-resistant, heat-resistant coatings and barrier layers obtained on the basis of the natural oxidation process. The article presents the gradation of oxidation of surfaces of 08kp thin-sheet steel at diff erent temperature-time parameters of one cycle “heating-cooling”. To regulate the processing modes and register thermal eff ects, a diff erential thermal analysis device was used. It is shown that the eff ect of elevated temperatures on steel in air at atmospheric pressure triggers an intensive growth of scale, which peels off from the metal base and breaks down. After descaling on the steel surface, in addition to blue tarnishing, in some cases, fi lms of a red tint were found. Based on the data of diff erential thermal analysis, an att empt was made to separate and interpret transformations related directly to steel and to reactions in scale associated with iron oxides.

scholarly journals Tracing Phase Transformation and Lattice Evolution in a TRIP Sheet Steel under High-Temperature Annealing by Real-Time In Situ Neutron Diffraction

Crystals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 360 ◽  
Author(s):  
Dunji Yu ◽  
Yan Chen ◽  
Lu Huang ◽  
Ke An
Keyword(s):  
Phase Transformation ◽  
High Temperature ◽  
Neutron Diffraction ◽  
Real Time ◽  
Retained Austenite ◽  
Sheet Steel ◽  
Carbon Diffusion ◽  
Structure Evolution ◽  
In Situ Neutron Diffraction

Real-time in situ neutron diffraction was used to characterize the crystal structure evolution in a transformation-induced plasticity (TRIP) sheet steel during annealing up to 1000 °C and then cooling to 60 °C. Based on the results of full-pattern Rietveld refinement, critical temperature regions were determined in which the transformations of retained austenite to ferrite and ferrite to high-temperature austenite during heating and the transformation of austenite to ferrite during cooling occurred, respectively. The phase-specific lattice variation with temperature was further analyzed to comprehensively understand the role of carbon diffusion in accordance with phase transformation, which also shed light on the determination of internal stress in retained austenite. These results prove the technique of real-time in situ neutron diffraction as a powerful tool for heat treatment design of novel metallic materials.

Mechanism of Zn Vapour Suppressed by Al In Laser Lap Welding of High Strength Zinc Coated Sheet Steel

2010 ◽  
Vol 37-38 ◽  
pp. 634-642 ◽  
Author(s):  
Shi Quan Zhou ◽  
Zhen Guo Peng
Keyword(s):  
Binary Alloy ◽  
Sheet Steel ◽  
Travel Speed ◽  
Laser Fusion ◽  
Single Beam ◽  
Dual Beam ◽  
Beam Method ◽  
Laser Lap Welding ◽  
Lap Welding ◽  
Coated Sheet

The basic feasibility of laser fusion welding for prefabrication and assembly of zinc-coated sheet steel auto body components has been demonstrated in a significant number of prior studies. For trouble-free high volume manufacturing, however, one leading key technical concern remains incompletely resolved. In lap or similar weld joint geometries, venting of trapped Zn vapour can seriously disturb the molten weld pool and give rise to gross fusion defects. In this paper, the technical status of the issue has been reviewed, and various experiments were planned to explore Al foil as an interlayer and dual beam laser for suppressing Zn vapour. The results have shown that the welding processing is very sTable when the lap 1+1 mm sheet steel is welded by using Nd-Yag laser at 3KW power and 4m/min travel speed (defined as single beam) with 75μm Al foil as interlayer. However, if first using 2KW power and 4m/min travel speed, secondly using 3KW power and4m/min travel speed (defined as dual beam), only 25 μm Al foil can stabilize welding fusion pool. It is found that Al foil just store the Zn vapour in the single beam method and cannot mix with Zn to form Al-Zn binary alloy, because the laser heating is too fast that Zn has been vaporized before Al was melted. But Al can mix with Zn to form Al-Zn binary alloy in the dual beam method, therefore, the boiling temperature is raised to about 1600°C. So that, in laser lap welding of Zn coated (galvanized) sheet steel, the Al-Zn alloy will be more effective than Al metal for stabilizing welding process.

Zinc Transport Phenomena in Laser Welding of Coated Sheet Steel in Overlap Configuration

2008 ◽  
Vol 52 (7-8) ◽  
pp. 33-41
Author(s):  
R. R. G. M. Pieters ◽  
C. Goos ◽  
B. Rietman ◽  
I. M. Richardson
Keyword(s):  
Laser Welding ◽  
Transport Phenomena ◽  
Sheet Steel ◽  
Zinc Transport ◽  
Coated Sheet
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