HOT-ROLLED STEEL PLATE

WIPO Patent Application WO/2023/063014

A1

This hot-rolled steel plate has a prescribed chemical composition, has a metal structure having, in area%, a total of martensite and tempered martensite at more than 92.0% but no more than 100.0%, retained austenite at less than 3.0%, and ferrite at less than 5.0%, and demonstrates an entropy value obtained by analyzing, by a gray level co-occurrence matrix method, a SEM image of the metal structure, of 11.0% or more, an inverse difference normalized value of less than 1.020, a cluster shade value of -8.0×105 to 8.0×105, an Mn concentration standard deviation of 0.60 mass% or less, and a tensile strength of 980 MPa or more.

JPH0297648	AUSTENITIC STAINLESS STEEL EXCELLENT IN CREEP RUPTURE STRENGTH AND ITS PRODUCTION
JPH0353019	MANUFACTURE OF STEEL HAVING EXCELLENT STRENGTH AND TOUGHNESS

TSUTSUI KAZUMASA (JP)
SHUTO HIROSHI (JP)

PCT/JP2022/034417

April 20, 2023

September 14, 2022

Click for automatic bibliography generation  

NIPPON STEEL CORP (JP)

C21D8/02; C21D9/46; C22C38/00; C22C38/58

WO2020184372A1	2020-09-17
WO2014166323A1	2014-10-16
WO2020044445A1	2020-03-05

JP2015214718A	2015-12-03
JP2015098629A	2015-05-28
JP2021166960A	2021-10-21

J. WEBELJ. GOLAD. BRITZF. MUCKLICH, MATERIALS CHARACTERIZATION, vol. 144, 2018, pages 584 - 596
D. L. NAIKH. U. SAJIDR. KIRAN, METALS, vol. 9, 2019, pages 546
K. ZUIDERVELD: "Graphics Gems IV", vol. 5, 1994, ACADEMIC PRESS, article "Contrast Limited Adaptive Histogram Equalization", pages: 474 - 485

MATSUNUMA Yasushi et al. (JP)

View/Download PDF      PDF Help

Previous Patent: REWARD GRANTING SYSTEM, REWARD GRANTING PROGRAM AND REWARD GRANTING METHOD

Next Patent: HETEROATOM-DOPED NANODIAMOND PARTICLE