ZINC-BASED PLATED STEEL SHEET HAVING EXCELLENT ROOM TEMPERATURE AGING RESISTANCE AND BAKE HARDENABILITY, AND METHOD FOR PRODUCING SAME

Title:

ZINC-BASED PLATED STEEL SHEET HAVING EXCELLENT ROOM TEMPERATURE AGING RESISTANCE AND BAKE HARDENABILITY, AND METHOD FOR PRODUCING SAME

Document Type and Number:

WIPO Patent Application WO/2019/124781

Kind Code:

A1

Abstract:

A zinc-based plated steel sheet having excellent room temperature aging resistance and bake hardenability according to an aspect of the present invention includes a base steel sheet and a zinc-based plating layer formed on the surface of the base steel sheet, wherein the base steel sheet contains, in wt%, no more than 0.005% (excluding 0%) of C, 0.1-1.0% of Mn, no more than 0.3% (excluding 0%) of Si, 0.01-0.08% of P, no more than 0.01% of S, no more than 0.01% of N, 0.01-0.06% of sol.Al, 0.002-0.02% of Nb, and 0.001~0.004% (excluding 0%) of B, with the remainder comprising Fe and inevitable impurities, and CS in formula 1 below can satisfy the range of 0.0002-0.002%. In formula 1, [C] and [Nb] represent the contents (wt%) of C and Nb, respectively, in the base steel sheet. [Formula 1] CS = [C]-(12/93)*[Nb]

Inventors:

LEE JE-WOONG (KR)
HAN SANG-HO (KR)

Application Number:

PCT/KR2018/014520

Publication Date:

June 27, 2019

Filing Date:

November 23, 2018

Export Citation:

Click for automatic bibliography generation Help

Assignee:

POSCO (KR)

International Classes:

C22C38/12; C21D8/02; C21D9/46; C22C38/04; C23C2/02; C23C2/06

Foreign References:

JPH07116581B2	1995-12-13
JPH07268544A	1995-10-17
JP2001200337A	2001-07-24
JP2002012920A	2002-01-15
JP2008110387A	2008-05-15
KR20000038789A	2000-07-05
JP2004292891A	2004-10-21
KR20020073564A	2002-09-27

Other References: