Title:
HOT STAMPED PART HAVING EXCELLENT LOW-TEMPERATURE BRITTLENESS RESISTANCE AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2024/032528
Kind Code:
A1
Abstract:
A hot stamped part having excellent low-temperature brittleness resistance, comprising Fe and inevitable impurities, and also comprising the following chemical elements in percentage by mass: C: 0.26-0.40%, Si: 0.1-1.5%, Mn+Cr: 0.5-3.0%, Al: 0.01-0.50%, Nb+Ti: 0.04-0.25%, Mo+Ni: 0.1-1.0%, and B: 0.001-0.005%. The matrix of the microstructure of the hot stamped part comprises a lathstrip-shaped tempered martensite having a volume ratio of more than 85%, and the microstructure of the hot stamped part also comprises precipitated phases, wherein the precipitation amounts of elements Nb and Ti account for more than 50% of the total mass fraction of the two elements, and the precipitated phases of Nb and Ti are dispersed and distributed in the matrix in the form of particles. Also disclosed is a manufacturing method for the hot stamped part.
Inventors:
LIU HAO (CN)
TAN NING (CN)
JIN XINYAN (CN)
TAN NING (CN)
JIN XINYAN (CN)
Application Number:
PCT/CN2023/111404
Publication Date:
February 15, 2024
Filing Date:
August 07, 2023
Export Citation:
Assignee:
BAOSHAN IRON & STEEL (CN)
International Classes:
C22C38/00; C21D8/00; C21D8/02; C22C38/02; C22C38/04; C22C38/06; C22C38/08; C22C38/12; C22C38/14; C22C38/18; C22C38/40; C22C38/58
Foreign References:
| CN105506494A | 2016-04-20 | |||
| CN102828106A | 2012-12-19 | |||
| CN112840046A | 2021-05-25 | |||
| CN114107795A | 2022-03-01 | |||
| JP2009030092A | 2009-02-12 | |||
| JP2010150612A | 2010-07-08 | |||
| JP2015193893A | 2015-11-05 |
Attorney, Agent or Firm:
SHANGHAI PATENT & TRADEMARK LAW OFFICE, LLC (CN)
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