Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
METHOD FOR PRODUCING STEEL SHEET FOR HOT STAMPING AND HOT STAMP MOLDED BODY, AND HOT STAMP MOLDED BODY
Document Type and Number:
WIPO Patent Application WO/2022/176851
Kind Code:
A1
Abstract:
This method for producing a steel sheet for hot stamping comprises a hot dip galvanizing process step in which a galvanizing layer is formed on the surface of a base material to form a plated steel sheet, and a surface grinding step in which surface grinding is carried out on the plated steel sheet. In the hot dip galvanizing process step, the average cooling speed from when the galvanizing layer is formed to when the temperature at the surface of the galvanizing layer reaches 400°C is set at 10°C/s or higher, a plating deposition amount M in terms of zinc content in the galvanizing layer is set at 65−150 g/m2, and the aluminum content A in the galvanizing layer is set at 0.20−0.70 mass%. In the surface grinding step, surface grinding is carried out under conditions in which the grinding amount G satisfies L ≤ G ≤ 10L (where L = 0.0048 × A × M + 0.138).

Inventors:
TAKEBAYASHI HIROSHI (JP)
AKIBA KOJIRO (JP)
SENGOKU AKIHIRO (JP)
Application Number:
PCT/JP2022/005936
Publication Date:
August 25, 2022
Filing Date:
February 15, 2022
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C23C2/26; B21D22/20; C23C2/02; C23C2/06; C23C2/40
Foreign References:
JP2015094006A2015-05-18
JP2015081368A2015-04-27
JP2019116654A2019-07-18
Attorney, Agent or Firm:
BRIGHTAS IP ATTORNEYS (JP)
Download PDF: