US 12,297,517 B2
Steel for hot stamping, hot stamping process and hot stamped component
Hongliang Yi, Liaoning (CN); Dapeng Yang, Liaoning (CN); Xiaochuan Xiong, Jiangsu (CN); and Guodong Wang, Liaoning (CN)
Assigned to Ironovation Materials Technology Co., Ltd., Jiangsu (CN)
Appl. No. 17/050,851
Filed by IRONOVATION MATERIALS TECHNOLOGY CO., LTD., Jiangsu (CN)
PCT Filed Dec. 27, 2018, PCT No. PCT/CN2018/124171
§ 371(c)(1), (2) Date Oct. 27, 2020,
PCT Pub. No. WO2019/205699, PCT Pub. Date Oct. 31, 2019.
Claims priority of application No. 201810401260.8 (CN), filed on Apr. 28, 2018.
Prior Publication US 2021/0214818 A1, Jul. 15, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C21D 9/48 (2006.01); B21D 22/02 (2006.01); C21D 1/673 (2006.01); C21D 6/00 (2006.01); C21D 8/02 (2006.01); C21D 8/12 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/48 (2006.01); C22C 38/50 (2006.01); C22C 38/54 (2006.01); C22C 38/58 (2006.01); C23C 2/28 (2006.01)
CPC C21D 9/48 (2013.01) [B21D 22/022 (2013.01); C21D 1/673 (2013.01); C21D 6/005 (2013.01); C21D 8/0205 (2013.01); C21D 8/0226 (2013.01); C21D 8/0263 (2013.01); C21D 8/1277 (2013.01); C22C 38/001 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/44 (2013.01); C22C 38/46 (2013.01); C22C 38/48 (2013.01); C22C 38/50 (2013.01); C22C 38/54 (2013.01); C22C 38/58 (2013.01); C23C 2/28 (2013.01); C23C 2/29 (2022.08); C21D 2211/001 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A hot stamped component, wherein the hot stamped component in weight percentage contains C: 0.3-0.4%, Si: 0-0.8%, Al: 0.6%-0.9%, B: 0.0005%<B≤0.005%, Mn: 0.5-3.0%, Mo: 0-1%, Cr: 0-2%, Ni: 0-5%, V: 0-0.4%, Nb: 0-0.2%, Ti: <0.01%, N: 0.0045%≤N<0.01%, with the balance being Fe and impurity elements unavoidable during smelting,
wherein the hot stamped component contains no TiN particles with particle size≥1 μm,
wherein the hot stamped component has a yield strength of 1200-1800 MPa, a tensile strength of 1500-2150 MPa, an elongation of 7-10%, and an impact toughness of ≥45J·cm−2 at −40° C. under confidence of 99.5%, and
wherein the hot stamped component contains dispersed AlN inclusions.