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

Hot-dip al-plated steel sheet production method, and hot-dip al-plated steel sheet

Inactive Publication Date: 2021-01-07
NIPPON STEEL CORP
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes a method for making a hot-dip Al-based metal-plated steel sheet with a plated layer that has fine spangles on its surface. The technical effect of this invention is that it enables the stable formation of fine spangles on the surface of a hot-dip Al-based metal-plated steel sheet.

Problems solved by technology

This causes each spangle to have a minute size.

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
  • Hot-dip al-plated steel sheet production method, and hot-dip al-plated steel sheet
  • Hot-dip al-plated steel sheet production method, and hot-dip al-plated steel sheet
  • Hot-dip al-plated steel sheet production method, and hot-dip al-plated steel sheet

Examples

Experimental program
Comparison scheme
Effect test

embodiment 1

[0065]The following description will discuss an embodiment of the present invention. Note that (i) a hot-dip Al-based metal-plated steel sheet in accordance with an embodiment of the present invention and (ii) a method for producing the hot-dip Al-based metal-plated steel sheet have configurations similar to the configurations of the comparative example (described earlier) unless otherwise stated. Note that, unless otherwise specified, the present invention is not limited to the following description, which is provided so that subject matters of the present invention are better understood. Note also that a numerical expression such as “A to B” as used herein means “not less than A and not more than B”.

[0066]The following description will schematically discuss knowledge of the present invention before discussing (i) a hot-dip Al-based metal-plated steel sheet in accordance with an embodiment of the present invention and (ii) a method for producing the hot-dip Al-based metal-plated st...

example 1

[0120]An Al-20 mass % Si master alloy was used to adjust an Si concentration in an aluminum plating bath to 9 mass %. Then, an Al-4 mass % B master alloy was added, in a predetermined amount, to the aluminum plating bath so that a B concentration in the aluminum plating bath was adjusted to 0% to 1%. Table 1 shows a result obtained by carrying out a chemical analysis with respect to a composition of the Al-4 mass % B master alloy added. Each figure shown in Table 1 indicates mass %.

TABLE 1Chemical composition (mass %)BSiFeK4.20.130.160.20

[0121]Assuming that Fe coming from, for example, a substrate steel sheet and a member of a pot would be unavoidably mixed in the aluminum plating bath during continuous production, cast iron that was made of a material of which the pot was made was melted so that an Fe concentration in the aluminum plating bath was adjusted to 2.0 mass %.

[0122]By thus adjusting the composition, Al-based hot-dip plating baths indicated by plating bath Nos. 1 to 10 sh...

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
Percent by massaaaaaaaaaa
Percent by massaaaaaaaaaa
Percent by massaaaaaaaaaa
Login to View More

Abstract

Provided is a method for producing a hot-dip Al-based metal-plated steel sheet including a plated layer having a surface on which fine spangle are stably formed. A method for producing a hot-dip Al-based metal-plated steel sheet, includes a composition adjusting step of adding a B-containing master alloy so as to adjust a composition of an Al-based hot-dip plating bath (3) containing aluminum as a main component, the composition being adjusted so that the Al-based hot-dip plating bath has a B concentration of not less than 0.005 mass % and a K concentration of more than 0 mass % and less than 0.0005 mass %, the K concentration being reduced in the Al-based hot-dip plating bath by supplying gas into the Al-based hot-dip plating bath so as to remove a suspended matter on a surface of the Al-based hot-dip plating bath.

Description

TECHNICAL FIELD[0001]The present invention relates to a method for producing a hot-dip Al-based metal-plated steel sheet that has fine spangles.BACKGROUND ART[0002]A hot-dip aluminum-based metal-plated steel sheet (hereinafter referred to as a “hot-dip Al-based metal-plated steel sheet”) is a steel sheet whose surface is plated with metal, containing aluminum as a main component, by a hot-dip method so that the steel sheet can have higher corrosion resistance and higher heat resistance. Such a hot-dip Al-based metal-plated steel sheet has been widely used mainly for members that are required to have heat resistance, such as exhaust gas members of automobiles and members of combustion devices.[0003]Note that a hot-dip Al-based metal-plated steel sheet includes a plated layer having a surface on which a spangle pattern appears, the spangle pattern being formed due to dendrites, which are structures obtained by solidification of aluminum. The spangle pattern is a characteristic geometr...

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
IPC IPC(8): C23C2/12C23C2/40
CPCC23C2/12C23C2/40C22C21/04C22C1/03C22C3/005C23C2/00344C23C2/004C23C2/325C22C21/02
Inventor FURUKAWA, SHINYAISHII, KOUTAROUHATTORI, YASUNORI
Owner NIPPON 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