Title:
HOT STAMPING PART
Document Type and Number:
WIPO Patent Application WO/2023/234501
Kind Code:
A1
Abstract:
According to one aspect of the present invention, provided is a hot stamping part comprising a steel sheet that includes: 0.26-0.40 wt% of carbon (C); 0.02-2.0 wt% of silicon (Si); 0.3-1.60 wt% of manganese (Mn); at most 0.03 wt% of phosphorus (P); at most 0.008 wt% of sulfur (S); 0.05-0.90 wt% of chromium (Cr); 0.0005-0.01 wt% of boron (B); 0.05-0.2 wt% of molybdenum (Mo); 0.001-0.095 wt% of titanium (Ti); 0.001-0.095 wt% of niobium (Nb); and 0.001-0.095 wt% of vanadium (V), with the balance being iron (Fe) and other inevitable impurities, and has a tensile strength of at least 1,700 MPa and a yield strength of at least 1,150 MPa, wherein the hot stamping part has a microstructure containing austenite grains and includes a carbon-based precipitate containing at least one among niobium (Nb), titanium (Ti), molybdenum (Mo), and vanadium (V), and the average size of the austenite grains is at most 15 µm.
Inventors:
YOO BYUNG GIL (KR)
KANG SEOK HYEON (KR)
KIM JE WOO SOO (KR)
HAN SEONG KYUNG (KR)
KANG SEOK HYEON (KR)
KIM JE WOO SOO (KR)
HAN SEONG KYUNG (KR)
Application Number:
PCT/KR2022/019346
Publication Date:
December 07, 2023
Filing Date:
December 01, 2022
Export Citation:
Assignee:
HYUNDAI STEEL CO (KR)
International Classes:
C22C38/34; B21D22/02; C21D8/02; C22C38/22; C22C38/24; C22C38/26; C22C38/28; C22C38/32; C22C38/38
Foreign References:
| KR20220029319A | 2022-03-08 | |||
| KR20210080677A | 2021-07-01 | |||
| KR20210037106A | 2021-04-06 | |||
| KR20220029320A | 2022-03-08 | |||
| KR20200036248A | 2020-04-07 |
Attorney, Agent or Firm:
Y.P.LEE, MOCK & PARTNERS (KR)
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