Steel sheet having hot-dip galvanized layer and exhibiting superior plating wettability and plating adhesion, and production method thereof

A hot-dip galvanized steel sheet, hot-dip galvanized technology, applied in hot-dip galvanizing process, manufacturing tools, chemical instruments and methods, etc. Excellent effect of excellent plating wettability

Active Publication Date: 2014-05-28
NIPPON STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, even with this method, plating adhesion is not sufficient

Method used

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  • Steel sheet having hot-dip galvanized layer and exhibiting superior plating wettability and plating adhesion, and production method thereof
  • Steel sheet having hot-dip galvanized layer and exhibiting superior plating wettability and plating adhesion, and production method thereof
  • Steel sheet having hot-dip galvanized layer and exhibiting superior plating wettability and plating adhesion, and production method thereof

Examples

Experimental program
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Effect test

Embodiment

[0112] Hereinafter, the present invention will be specifically described by way of examples.

[0113] As mentioned above, the usual casting, hot rolling, pickling, and cold rolling are carried out by the continuous hot dip galvanizing equipment equipped with a full radiant tube heating furnace, which is a relatively high-productivity heating method that is less likely to cause sticking. Samples 1 to 72 of the 1 mm-thick cold-rolled sheet shown in Table 1 were annealed and plated. By using the full radiant tube type, as mentioned above, roll sticking is less likely to occur, and productivity is also good.

[0114] Table 1-1

[0115] Table 1 Composition and thickness of cold-rolled steel sheets

[0116]

[0117] Table 1-2

[0118]

[0119] Nitrogen gas containing hydrogen and water vapor was introduced into the heating furnace and the soaking furnace, respectively. Tables 2 to 7 show the conditions in the heating furnace and the soaking furnace, and the logarithm log(P...

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Abstract

Provided are a steel sheet that has a hot-dip galvanized layer and that exhibits superior plating wettability and plating adhesion, and a production method thereof. A steel sheet containing readily oxidizable elements including Si and Mn is used as a base material. The hot-dip galvanized steel sheet has a hot-dip galvanized layer (A) on the surface of the steel sheet and is characterized by having a (B) layer that is directly under the surface of and inside of the steel sheet. The (B) layer has a thickness of 0.001 [mu]m to 0.5 [mu]m. By mass, the (B) layer contains 50 mass% or more of unoxidized Fe, less than 50 mass% total of one or more oxides of Fe, Si, Mn, P, S, and / or Al, and contains unoxidized C, Si, Mn, P, S, and / or Al in the following quantities: less than 0.05 mass% of C; less than 0.1 mass% of Si; less than 0.5 mass% of Mn; less than 0.001 mass% of P; less than 0.001 mass% of S; and less than 0.005 mass% of Al.

Description

technical field [0001] The present invention relates to a hot-dip galvanized steel sheet and a method for producing the same. Zinc-coated steel sheet and method for producing the same. Background technique [0002] Surface-treated steel sheets imparted with antirust properties are used for components in the fields of automobiles, home appliances, and building materials. Among them, hot-dip galvanized steel sheets that can be manufactured at low cost and have excellent antirust properties have been used. [0003] In general, hot-dip galvanized steel sheets can be manufactured using continuous hot-dip galvanizing equipment in the following ways. First, the thin steel plate obtained by hot rolling, cold rolling or heat treatment of the slab is used, and the pretreatment process is used for degreasing and / or pickling for the purpose of cleaning the surface of the base metal steel plate, or the pretreatment process is omitted. In the hot furnace, the oil on the surface of the b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/06C22C18/00C22C38/00C22C38/06C22C38/58C23C2/02C23C2/40
CPCC22C18/00C23C2/40C23C2/06C22C38/00C22C38/04C22C38/06C23C2/02C22C38/58C21D9/46B32B15/013C22C38/02C21D1/74C21D8/0226C21D8/0236C21D8/0278Y10T428/12799C23C2/0222C23C2/0038C23C2/024C23C2/0224
Inventor 藤田宗士山中晋太郎佐藤浩一
Owner NIPPON STEEL CORP
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