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

Ferrite-based hot-rolled stainless steel sheet, hot-rolled annealed sheet, and method for manufacturing said sheets

A technology of hot-rolled steel sheet and manufacturing method, applied in manufacturing tools, heat treatment furnaces, heat treatment equipment, etc., can solve the problems of corrosion, worry about exhaust gas, etc., and achieve the effect of sufficient corrosion resistance and restraint of deflection

Active Publication Date: 2018-03-23
JFE STEEL CORP
View PDF10 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for components such as the EGR system through which exhaust gas passes, there is concern about corrosion caused by exhaust gas

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
  • Ferrite-based hot-rolled stainless steel sheet, hot-rolled annealed sheet, and method for manufacturing said sheets
  • Ferrite-based hot-rolled stainless steel sheet, hot-rolled annealed sheet, and method for manufacturing said sheets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0106] Hereinafter, the present invention will be described in detail through examples.

[0107] Molten stainless steel having the chemical composition shown in Table 1 was smelted by a converter with a capacity of 150 tons and refined by strong stirring and vacuum oxygen decarburization treatment (SS-VOD), and a steel billet with a width of 1000 mm and a thickness of 200 mm was produced by continuous casting. After heating this billet at 1200° C. for 1 hour, reverse rough rolling using a three-stage stand was performed as hot rolling to produce a steel plate of about 40 mm, and then a finish consisting of 7 passes was performed under the conditions described in Table 2. The final 3 passes of rolling (5th pass, 6th pass, 7th pass) are made into hot-rolled steel sheets. In addition, a part of the hot-rolled steel sheets (No. 25, 26, and 38 in Table 2) were hot-rolled and held for 8 hours under the conditions described in Table 2, followed by furnace-cooled hot-rolled sheet anne...

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
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

Provided are a ferrite-based hot-rolled stainless steel sheet and a hot-rolled annealed sheet that are adequately resistant to corrosion and are capable of inhibiting deflection and distortion following shaping. The ferrite-based hot-rolled stainless steel sheet contains 0.005-0060% by mass of C, 0.02-0.50% by mass of Si, 0.01-1.00% by mass of Mn, 0.04% or less of P, 0.01% or less of S, 15.5-18.0%by mass of Cr, 0.001-0.10% by mass of Al, 0.005-0.100% by mass of N, and 0.1-1.0% by mass of Ni, the remainder comprising Fe and inevitable impurities, and the absolute value of the in-plane anisotropy of the longitudinal modulus as calculated from formula (1) below being 35 GPa or less. the absolute value of [delta]E=the absolute value of (EL-28ED+EC) / 2 ... (1) (where EL is the longitudinal modulus (GPa) for the direction parallel to the rolling direction, ED is the longitudinal modulus (GPa) for the direction 45 degrees from the rolling direction, and EC is the longitudinal modulus (GPa) for the direction perpendicular to the rolling direction)

Description

technical field [0001] The present invention relates to ferritic stainless steel hot-rolled steel sheets and hot-rolled annealed sheets having sufficient corrosion resistance and excellent rigidity, and methods for producing them. Background technique [0002] In recent years, the strengthening of laws and regulations related to automobile exhaust gas has been promoted, and the improvement of fuel economy has become a top priority. Therefore, the application of an exhaust gas recirculation (Exhaust Gas Recirculation, EGR) system that uses the exhaust gas generated by the engine of the vehicle again as intake air for the engine is advancing. Exhaust gas generated by the engine is supplied to the engine again after passing through an EGR cooler for lowering the gas temperature. When circulating the exhaust gas, it is necessary to provide flanges between the components in order to prevent gas leakage. Among them, for flanges used in the connection with parts such as EGR coole...

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): C22C38/00C21D9/46C22C38/40C22C38/54
CPCC22C38/00C22C38/40C22C38/54C21D9/46C21D8/0205C21D8/0226C21D8/0263C21D2211/005C22C38/001C22C38/002C22C38/005C22C38/02C22C38/04C22C38/06C22C38/42C22C38/46C22C38/48C22C38/50C22C38/52C22C38/44
Inventor 吉野正崇藤泽光幸上力
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