Location History:
- Osaka-fu, JP (2001 - 2002)
- Osaka, JP (2004)
- Sakai, JP (2007 - 2011)
Company Filing History:
Years Active: 2001-2011
Title: Innovations by Atsushi Andoh
Introduction
Atsushi Andoh is a notable inventor based in Sakai, Japan. He has made significant contributions to the field of materials engineering, particularly in the development of advanced welded structures and manufacturing processes. With a total of 5 patents to his name, Andoh continues to push the boundaries of innovation in his industry.
Latest Patents
One of his latest patents is for a steel/aluminum welded structure. This invention comprises a hot-dip Al-coated steel sheet that is spot welded with an aluminum or aluminum alloy sheet. The steel sheet is coated with a layer containing 3-12% of Si and 0.5-5% of Fe by mass. The area ratio of an Al-Fe binary alloy layer, formed at the joint boundary, is controlled to 90% or less. An unalloyed region exists between an Al-Fe-Si ternary alloy layer at the interface of a steel substrate with the coating layer interface and the Al-Fe binary alloy layer at the joint boundary. The steel substrate preferably contains 0.002-0.020% of N to form a N-enriched surface layer in contact with the coating layer. This N-enriched layer impedes the propagation of the brittle Al-Fe binary alloy layer throughout the joint boundary and enhances the joint strength of the steel/aluminum welded structure.
Another significant patent by Andoh is a method of manufacturing a zinc alloy ingot. In this process, a molten zinc alloy containing 4-22 mass % Al and 1-7 mass % Mg is held at a temperature higher than the solidification-beginning temperature plus 85°C for homogenization. It is then cooled down to a temperature equal to the solidification-beginning temperature plus 20-65°C. After pouring the molten alloy into a mold, it is naturally cooled and solidified into an ingot, while its upper part is heated. Once the upper surface of the zinc alloy in the mold begins to solidify, it can be optionally cooled with water. The resulting ingot has a structure free of cracks or cavities, making it suitable for safe feeding into a molten pool for replenishment.
Career Highlights
Atsushi Andoh is currently employed at Nisshin Steel Co., Ltd., where he continues to innovate and develop new technologies. His work has
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