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Material for hot stamping and method for producing same

A hot stamping and reheating technology, which is applied in the manufacture of tools, metal rolling, heat treatment furnaces, etc., can solve the problems of uncontrollable hydrogen delayed fracture and achieve excellent mechanical and physical properties and excellent hydrogen-induced delayed fracture characteristics.

Pending Publication Date: 2022-05-10
HYUNDAE STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since it is impossible to completely prevent the introduction of hydrogen, there is concern that hydrogen-induced delayed fracture may result due to the uncontrollable hydrogen introduction.

Method used

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  • Material for hot stamping and method for producing same
  • Material for hot stamping and method for producing same
  • Material for hot stamping and method for producing same

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Embodiment Construction

[0028] As the invention allows for various changes and has many embodiments, specific embodiments will be shown in the drawings and described in detail. The effects and features of the present invention and methods for achieving the effects and features will become more apparent with reference to the embodiments described in detail below and the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various forms.

[0029] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, and when describing with reference to the accompanying drawings, the same reference numerals will be assigned to the same or corresponding technical features, and repeated descriptions thereof will be omitted.

[0030] In the following embodiments, the terms "first", "second", etc. are used to distinguish one component from other components, and do not have a lim...

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Abstract

Provided are: a material for hot stamping, which is capable of ensuring excellent mechanical and physical properties and hydrogen-induced delayed fracture characteristics of a hot-stamped member, and which comprises a steel sheet and fine precipitates distributed in the steel sheet; and a method for producing the material for hot stamping. The steel sheet contains 0.28 wt% to 0.50 wt% of carbon (C), 0.15 wt% to 0.70 wt% of silicon (Si), 0.5 wt% to 2.0 wt% of manganese (Mn), equal to or less than 0.05 wt% of phosphorus (P), equal to or less than 0.01 wt% of sulfur (S), 0.1 wt% to 0.5 wt% of chromium (Cr), 0.001 wt% to 0.005 wt% of boron (B), equal to or less than 0.1 wt% of additives, and a remainder of iron (Fe) and other unavoidable impurities, wherein the additive includes at least one of titanium (Ti), niobium (Nb), and vanadium (V), and wherein the fine precipitate includes a nitride or carbide of at least one of titanium (Ti), niobium (Nb), and vanadium (V), and captures hydrogen.

Description

technical field [0001] Embodiments of the present invention relate to a material for hot stamping and a manufacturing method thereof, and more particularly, to a material for hot stamping capable of securing excellent mechanical physical properties and hydrogen-induced delayed fracture characteristics of a hot stamping part and a manufacturing method thereof. Background technique [0002] High-strength steels used to reduce weight and ensure stability are used in parts such as cars. However, high-strength steel can ensure high-strength characteristics compared to its weight, but as its strength increases, its press-formability deteriorates, and material fracture or springback occurs during processing, making it difficult to form complex shapes. And accurate products. [0003] As a method for improving these problems, the hot stamping method is the most representative, and as interest in it has increased, research on materials for hot stamping has been actively carried out. ...

Claims

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Application Information

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IPC IPC(8): C22C38/32C22C38/38C22C38/28C22C38/26C22C38/24C22C38/04C22C38/02C21D8/02B21B1/26
CPCC22C38/32C22C38/38C22C38/28C22C38/26C22C38/24C22C38/04C22C38/02C21D8/0226C21D8/0242B21B1/26C21D9/46C21D8/0273C21D8/0236C21D1/02C21D8/0205C21D8/021C21D2211/004B21D22/022C21D6/002C21D6/005C21D6/008C21D6/02C22C38/002
Inventor 辛努利康熏哲孙志熙金昞勋
Owner HYUNDAE STEEL CO LTD
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