Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

High-mn steel and method for manufacturing same

A manufacturing method and billet technology, applied in the direction of manufacturing tools, furnaces, heat treatment equipment, etc., can solve the problems of destructive performance, deformation and deformation performance, etc., and achieve the effects of improved safety and service life, and excellent resistance to chloride stress corrosion cracking

Pending Publication Date: 2021-09-17
JFE STEEL CORP
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is because the deformation performance at the later stage of deformation is the performance of the final stage leading to the final failure

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High-mn steel and method for manufacturing same
  • High-mn steel and method for manufacturing same
  • High-mn steel and method for manufacturing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0087] Hereinafter, the present invention will be described in detail through examples. It should be noted that the present invention is not limited to the following examples.

[0088] Billets having the composition shown in Table 1 were produced into billet materials by a converter-ladle refining-continuous casting method. Next, the steel slab obtained was made into a steel plate with a maximum thickness of 32 mm by billet rolling and hot rolling under the conditions shown in Table 2. The steel sheets were evaluated for tensile properties, toughness, and structure in the following manner.

[0089] (1) Tensile test characteristics

[0090] From each steel plate obtained, if the steel plate is thicker than 15mm, take JIS No. 4 tensile test piece, and if the steel plate thickness is less than 15mm, take a round bar tensile test piece with a diameter of 6mm at the parallel part and a distance between punctuation points of 25mm, and perform tensile test. Tensile test to investi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
yield strengthaaaaaaaaaa
yield strengthaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

Provided is a high-Mn steel having high strength and excellent low-temperature toughness, as well as excellent ductility. This high-Mn steel has: a component composition which contains, in terms of mass%, 0.10% to 0.70% C, 0.10% to 0.90% Si, 20% to 30% Mn, no more than 0.030% P, no more than 0.0070% S, 0.01% to 0.07% Al, 1.8% to 7.0% Cr, 0.01% to less than 1.0% Ni, 0.0005% to 0.010% Ca, 0.0050% to 0.0500% N, no more than 0.0050% O, no more than 0.0050% Ti, and no more than 0.0050% Nb, and which satisfies the expression Ca / S >= 1.0, the remainder being Fe and unavoidable impurities; and a structure having austenite as the matrix phase; the yield strength of the high-Mn steel being 400 MPa or greater, and the average value of the Charpy impact absorption energy at -196 DEG C being 100 J or greater when a full-size test piece is used, and 20 J or greater when a half-size test piece is used.

Description

technical field [0001] The present invention relates to high Mn steel suitable for structures used in extremely low temperature environments such as liquefied gas storage tanks and a method for producing the same. Background technique [0002] Since the structure for liquefied gas storage tanks is used in an extremely low temperature environment, the steel plate used for this structure is required not only to have high strength, but also to be excellent in toughness at extremely low temperatures. For example, when using hot-rolled steel sheets for storage tanks of liquefied natural gas, it is necessary to ensure excellent toughness at extremely low temperatures below -164°C, which is the boiling point of liquefied natural gas. If the low-temperature toughness of the steel material is poor, it may not be possible to maintain the safety as a structure for an ultra-low temperature storage tank. Therefore, it is strongly required to improve the low-temperature toughness of the s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C21D8/02C22C38/00C22C38/58
CPCC22C38/58C21D6/005C21D6/002C21D2211/001C21D9/46C21D8/021C21D8/0247C21D8/0263C21D8/0226C21D1/02C22C38/002C22C38/06C22C38/02C22C38/005C21D8/02C21D8/0205C21D6/004C22C38/48C22C38/50C22C38/001C22C38/42C22C38/46C22C38/44
Inventor 中岛孝一植田圭治伊藤阳一伊木聪小野知宏
Owner JFE STEEL CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com