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Hot Stamped Formed Body

A hot stamping, volume fraction technology, applied in heat treatment furnaces, furnace types, heat treatment equipment, etc., to achieve excellent corrosion resistance

Active Publication Date: 2022-05-31
NIPPON STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] On the other hand, molded objects produced by hot stamping are processed at high temperatures, so oxide scales are formed on the surface

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0221] Hereinafter, the present invention will be specifically described by way of examples. The present invention is not limited to the following examples.

[0222] First, a base material constituting a hot stamped body is prepared. That is, using the chemical composition shown in Table 1 and the balance of Fe

and impurities in molten steel, slabs are produced by continuous casting. Next, the slab is hot-rolled to produce a hot-rolled steel sheet, and further hot-rolled

The steel sheet is pickled and then cold-rolled to manufacture a cold-rolled steel sheet. Use the manufactured cold-rolled steel sheet as plated steel for hot stamping

The base metal of the plate (plate thickness: 1.4mm or 0.8mm).

[Table 1]

Table 1

[0225]

Balance: Fe and impurities

Next, use the base material of manufacture, use the batch type hot-dipping apparatus of Lesca company system, use and contain table 2 and table 3

The plating baths of the indicated components were used to manufactur...

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Abstract

A hot stamped formed body comprising a steel base material and a metal layer formed on the surface of the steel base material, the metal layer comprising: an interface layer containing Al: 30.0 in mass % ~36.0%, with a thickness of 100nm~5μm, located at the interface with the steel base material; and the main layer, wherein MgZn 2 phase and island FeAl 2 The phases are mixed, the thickness is 3 μm-40 μm, and they are located on the interface layer.

Description

hot stamping technical field [0001] The present invention relates to a hot stamped body. Background technique [0002] In order to improve both strength and dimensional accuracy of structural parts (molded bodies) used in automobiles and the like, thermal Stamping (hot pressing) to manufacture. In the production of the formed body by hot stamping, the steel sheet is heated to Ac 3 above the point, press with a mold processing and rapid cooling. That is, in this production, press working and quenching are simultaneously performed. High ruler can be made by hot stamping Dimensionally accurate and high-strength molded body. On the other hand, the molded body produced by hot stamping is processed at a high temperature, so the surface into oxide skin. Patent Documents 1 to 5 propose to suppress the formation of scale by using a plated steel sheet as a steel sheet for hot stamping. technology to improve corrosion resistance. [0004] For example, Japanese Patent ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C2/28B21D22/20B32B15/01C22C18/00C22C21/00C22C30/06C22C38/00C23C2/06C23C2/12
CPCB32B15/01C22C18/00C22C30/06C23C2/06C23C2/12C23C2/28C23C28/025C23C28/023C22C38/04C22C38/02C22C38/28C22C21/10B32B15/013B32B15/012C22C30/00C22C18/04C22C38/001C22C38/32C22C38/06C21D1/673C21D1/76C21D1/40C21D1/34C21D1/18C21D2211/008C23C28/02C23C2/261C23C2/29C23C18/04B21D22/20C22C21/00C22C38/00C23C8/12C23C28/021C23C28/321C23C28/3225C23C28/345C23C30/005B21D22/022B32B15/043B32B15/18B32B15/20C22C30/02C22C38/002B32B2311/30B32B2311/20B32B2311/22B32B2311/12B32B15/04B32B2311/24C23C30/00C23C28/322C22C38/004C23C28/32Y10T428/12958Y10T428/12743Y10T428/12951Y10T428/2495Y10T428/12757Y10T428/12972Y10T428/1259Y10T428/263Y10T428/12736Y10T428/12799Y10T428/264Y10T428/12979C21D8/005Y10T428/26Y10T428/1275Y10T428/12611Y10T428/24967C21D9/0068Y10T428/12618Y10T428/12792Y10T428/265Y10T428/1266Y10T428/12764
Inventor 德田公平光延卓哉仙石晃大松村贤一郎
Owner NIPPON STEEL CORP
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