MUMBAI, India, Nov. 2 -- Intellectual Property India has published a patent application (202617094352 A) filed by Jfe Steel Corporation on August 04, 2026, for High-Strength Steel Sheet And Method For Manufacturing Same.
Inventor includes Takajo Shigehiro.
The application for the patent was published on October 30, 2026, under issue no. 44/2026.
Abstract: Provided are a high-strength steel sheet and a method for manufacturing same, the high-strength steel sheet having a tensile strength of 980MPa or more and excellent hydrogen embrittlement resistance of a bent part, wherein: a steel structure at a 1/4 plate thickness position and in an outermost layer contains 0%-20% by area ratio of (ferrite + bainite), 4%-20% by volume ratio of residual ?, 70% or more by area ratio of tempered martensite, and 0%-20% by area ratio of fresh martensite; and when the texture of the tempered martensite in a plate thickness cross section in the rolling direction is evaluated by a SEM-EBSD method, in an orientation distribution function represented in the Euler space of 0 = f1 = 90°, f2 = 45°, and 0 = F = 90° expressed by the Bunge's method, the maximum ODF of {111} grains represented by the maximum intensity value with f1 = 5 × n°, f2 = 45°, and F = 55° (n is an integer of 0-18) at the 1/4 plate thickness position is 2.0 or more, and the maximum ODF of {100} grains represented by the maximum intensity value with f1 = 5 × n°, f2 = 45°, and F = 0° (n is an integer of 0-18) in the plate thickness surface layer is 1.0 or more.
Disclaimer: Curated by HT Syndication.
