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Plated steel sheet for hot stamping, method of manufacturing plated steel sheet for hot stamping, method of manufacturing hot-stamped component, and method of manufacturing vehicle

a technology of hot stamping and plated steel, which is applied in the direction of heat treatment apparatus, superimposed coating process, furnace, etc., can solve the problems of reducing the weight of the steel sheet, reducing the processing itself, and preventing the possibility of reducing the weight of the vehicle body. , to achieve the effect of suppressing the occurren

Inactive Publication Date: 2020-01-23
NIPPON STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes a way to make a plated steel sheet that can be used for hot stamping. This sheet helps to prevent wear and damage to the part that is being hot stamped. Additionally, the text describes methods for making a Hot-stamped product and a vehicle that uses this plated steel sheet.

Problems solved by technology

However, in automobiles, simply realizing weight reduction of vehicle body is not permitted due to product quality, and it is necessary to ensure adequate safety.
However, as mentioned above, simply reducing the weight of the steel sheet is not permitted, and it is also demanded to ensure the mechanical strength of the steel sheet.
In general, materials having high mechanical strength tend to have lower shape freezing properties in forming such as bending processing, and when such materials are processed into complicated shapes, processing itself becomes difficult.
Therefore, it is necessary to perform a process (descaling process) for removing this scale after performing hot stamping, resulting in a decrease in productivity.
For a member or like that requires corrosion resistance, it is necessary to subject the surface thereof to rust prevention treatment or metal coating after processing, which requires a surface cleaning step and a surface treatment step, reducing the productivity as well.
Therefore, when heated for hot stamping, a plating layer on the surface evaporates, which may be a cause of remarkable deterioration of surface properties.

Method used

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  • Plated steel sheet for hot stamping, method of manufacturing plated steel sheet for hot stamping, method of manufacturing hot-stamped component, and method of manufacturing vehicle
  • Plated steel sheet for hot stamping, method of manufacturing plated steel sheet for hot stamping, method of manufacturing hot-stamped component, and method of manufacturing vehicle
  • Plated steel sheet for hot stamping, method of manufacturing plated steel sheet for hot stamping, method of manufacturing hot-stamped component, and method of manufacturing vehicle

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examples

[0154]The disclosure will be further described with reference to Examples. The disclosure is not limited to the following embodiments.

examples 1 to 4

, Comparative Examples 5 to 6

[0156]Both sides of a cold-rolled steel sheet having a thickness shown in Table 1 (based on % by mass, C: 0.21%, Si: 0.12%, Mn: 1.21%, P: 0.02%, S: 0.012%, Ti: 0.02%, B: 0.03%, Al: 0.04%, and the balance: Fe and impurities) were Al plated by a Sendzimir process. The annealing temperature was about 800° C., an Al plating bath contained 9% Si and further contained Fe eluted from the cold-rolled steel sheet. The Al basis weight after plating was adjusted by a gas wiping method, the Al basis weight per one side shown in Table 1 was obtained, and the sheet was then cooled. Thereafter, a chemical solution (nanotek slurry manufactured by C. I. Kasei Co., Ltd., particle size of zinc oxide particles=70 nm) was coated on the Al plating layer thus formed with a roll coater and baked at about 80° C., and a ZnO film having an adhesion amount (based on Zn amount) shown in Table 1 was formed. Next, zinc bis-octanoate (Zn-OCTOATE 22% solvent-free “manufactured by DIC Co...

examples 5 to 8

, Comparative Examples 7 to 8

[0157]Both sides of a cold-rolled steel sheet having a thickness shown in Table 1 (based on % by mass, C: 0.21%, Si: 0.12%, Mn: 1.21%, P: 0.02%, S: 0.012%, Ti: 0.02%, B: 0.03%, Al: 0.04%, and the balance: Fe and impurities) were Al plated by a Sendzimir process. The annealing temperature was about 800° C., an Al plating bath contained 9% Si and further contained Fe eluted from the cold-rolled steel sheet. The Al basis weight after plating was adjusted by a gas wiping method, the Al basis weight per one side shown in Table 1 was obtained, and the sheet was then cooled. Thereafter, zinc bis-octanoate (“Zn-OCTOATE 22% solvent-free” manufactured by DIC Corporation) as zinc-based metal soap was coated on the Al plating layer thus formed with a roll coater, and a zinc-based metal soap film having an adhesion amount shown in Table 1 was formed. In this way, a test material of a plated steel sheet was obtained.

[0158]

[0159]Characteristics of the test material of ...

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Abstract

Provided are a plated steel sheet for hot stamping including: a plated steel sheet body including a steel sheet and an aluminum plating layer provided on one side or both sides of the steel sheet; and a zinc-based metal soap film provided on a surface of the plated steel sheet body on a side of the aluminum plating layer and having an adhesion amount of from 7.1 to 19.8 g / m2 based on a Zn amount (when, in the plated steel sheet body, a zinc oxide film is on the surface of an aluminum plating layer, the total adhesion amount of the zinc oxide film and the zinc-based metal soap film is from 7.1 to 19.8 g / m2 based on a Zn amount.), and a method of manufacturing such a sheet. Also provided are a method of manufacturing a hot-stamped component using the plated steel sheet for hot stamping, and a method of manufacturing a vehicle using a stamped component manufactured by a method of manufacturing a hot-stamped component.

Description

TECHNICAL FIELD[0001]The present disclosure relates to a plated steel sheet for hot stamping, a method of manufacturing a plated steel sheet for hot stamping, a method of manufacturing a hot-stamped component, and a method of manufacturing a vehicle.BACKGROUND ART[0002]In recent years, there has been a growing demand for suppressing consumption of chemical fuels in order to protect the environment and to prevent global warming, and this demand has influence on a variety of manufacturing industries. For example, automobiles that are indispensable to daily life and activities as a means of transportation are no exception, and improvements in fuel economy, such as weight reduction of the car body, or the like is required. However, in automobiles, simply realizing weight reduction of vehicle body is not permitted due to product quality, and it is necessary to ensure adequate safety.[0003]Many of the structures of automobiles are formed of iron, in particular steel sheets, and it is impo...

Claims

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Application Information

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IPC IPC(8): C23C28/02C22C38/00C23C2/12C23C2/06C23C22/66B21D22/00
CPCB21D22/00C23C28/025C23C2/06C23C2/12C23C22/66C22C38/00B21D22/20B21D22/26C21D1/18C21D9/00C23C28/345C23C2/26C23C2/40C23C28/321C23C2/28C23C2/29C23C28/34C23C18/1216B21D22/022B21D22/208C21D9/52C22C21/02C23C28/00
Inventor KUBO, MASAHIRONAKAZAWA, YOSHIAKISUZUKI, TOSHIYANOMURA, NARIHIKOFUJITA, SOSHIIRIKAWA, HIDEAKI
Owner NIPPON STEEL CORP
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