MUMBAI, India, Aug. 10 -- Intellectual Property India has published a patent application (202617073954 A) filed by Jfe Steel Corporation on June 15, 2026, for Hot-Rolled Steel Sheet And Method For Producing Same.
Inventors include Matsui Yoichiro; Sumida Eisuke; and Kimura Hideyuki.
The application for the patent was published on July 31, 2026, under issue no. 31/2026.
Abstract: The purpose of the present invention is to provide: a hot-rolled steel sheet having excellent scale adhesion, in particular, having small variations in scale adhesion in the width direction of a coil, even in a hot-rolled steel sheet having a larger plate thickness; and a method for producing the same. The present invention provides a hot- rolled steel sheet having a prescribed component composition and having scale on the surface of the steel sheet, wherein: the scale in the width direction of the steel sheet has a structure including, in terms of area ratio, 20-60% of magnetite particles, at least 30% of an eutectoid transformation structure of iron and magnetite, where the magnetite comprises the magnetite particles and magnetite contained in the eutectoid transformation structure, and at most 15% of wustite, as well as at most 5% of hematite in terms of mass fraction; the average thickness of the scale in the width direction of the steel sheet is 5-20 µm; and the variation in the thickness of the scale in the width direction of the steel sheet is 4 µm or less.
Disclaimer: Curated by HT Syndication.
