Al-fe-alloy plated steel sheet for hot forming, having excellent twb welding characteristics, hot forming member, and manufacturing methods therefor

A technology of welding characteristics and alloying, applied in chemical instruments and methods, forming tools, welding equipment, etc., can solve the problems of increasing the corrosion resistance and defects of the removed coating, and achieve the effect of uniform hardness and excellent welding characteristics.

Pending Publication Date: 2021-01-12
浦项股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, Patent Document 2 has the problem that in order to commercially apply the technology of Patent Document 2, it is necessary to introduce additional equipment to remove a part of the Al plating before TWB welding, and the area of ​​the removed plating is wider than the area of ​​the actual welded portion, Thus ultimately increasing the risk of poor corrosion resistance where the plating is removed

Method used

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  • Al-fe-alloy plated steel sheet for hot forming, having excellent twb welding characteristics, hot forming member, and manufacturing methods therefor
  • Al-fe-alloy plated steel sheet for hot forming, having excellent twb welding characteristics, hot forming member, and manufacturing methods therefor
  • Al-fe-alloy plated steel sheet for hot forming, having excellent twb welding characteristics, hot forming member, and manufacturing methods therefor

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Embodiment Construction

[0136] Hereinafter, the present invention will be described more specifically by way of examples. However, it should be noted that the following examples are only used to illustrate the present invention for more detailed description, and are not intended to limit the scope of rights of the present invention. This is because the scope of rights of the present invention is determined by the content described in the claims and the content reasonably derived therefrom.

[0137] (Example)

[0138] A slab having the composition shown in Table 1 below was heated to 1100°C, hot finish rolled at 900°C, and coiled at 650°C. Afterwards, plating was carried out by immersing in a plating bath containing Si: 8%, Fe: 2%, the balance of Al and unavoidable impurities in % by weight, and then carried out under the conditions described in Table 2 below Batch annealing to produce Al-Fe alloyed plated steel sheets.

[0139] The Al-Fe alloyed layers of the Al-Fe alloyed coated steel sheets were...

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Abstract

One preferred aspect of the present invention provides: an Al-Fe-alloy plated steel sheet for hot forming, having excellent TWB welding characteristics since excellent hardness uniformity of a TWB weld zone after hot forming is obtained by suitably controlling a batch annealing condition, after plating Al, such that an Al-Fe-alloy layer is formed; a hot forming member; and manufacturing methods therefor.

Description

technical field [0001] The present invention relates to an Al-Fe alloyed plated steel sheet for thermoforming with excellent TWB welding properties, a thermoformed part, and a method for producing the same. Background technique [0002] In recent years, in order to improve fuel efficiency by reducing the weight of automobiles, and for the purpose of protecting passengers, etc., ultra-high-strength thermoformed parts have been widely used in structural parts of automobiles. Further, in order to absorb energy during collisions, it has been proposed to use A technology for thermoforming a tailor welded blank (TWB) of a combination of different kinds of materials or different thicknesses, etc., and various related researches are underway. [0003] There is Patent Document 1 as a representative technique related to such a thermoforming technique. Patent Document 1 discloses that an Al-Si plated steel sheet is heated to 850 degrees or higher, and the structure of the part is form...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/12C23C2/40C23C2/28B21D22/00B21D37/16
CPCC23C2/28C23C2/40C23C2/12C22C38/14C22C38/04C22C38/02C22C38/12C22C38/32C21D6/005C22C38/22C22C38/38C22C38/26C22C38/28B32B15/012C21D1/673C21D8/005C21D8/0426C21D8/0447C21D8/0463C21D9/505C21D9/48C21D9/0068C21D9/50C21D1/76C21D2211/002C21D2211/005C21D2211/001C21D2211/008B21D35/006B21D22/022C23C2/02C23C2/261C23C2/29C23C2/0224B23K2103/20B23K2103/166B23K35/0238B23K35/3086C21D8/0205C21D8/0226C21D8/0236C21D9/46C22C38/06
Inventor 金圣祐吴振根赵悦来慎贤贞
Owner 浦项股份有限公司
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