公开(公告)号：EP4414169A1

公开(公告)日：2024-08-14

申请号：EP24156701.5

申请日：2024-02-08

申请人： The University of Hong Kong

发明人： HUANG, Mingxin ,  GUAN, Ming

IPC分类号： B32B15/01 ,  B21D22/02 ,  C21D1/673 ,  C21D7/13 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C23C2/12 ,  C23C2/28 ,  C23C2/40

CPC分类号： B21D22/022 ,  B32B15/012 ,  C21D2211/00820130101 ,  C21D7/13 ,  C21D1/673 ,  C21D9/46 ,  C21D2211/00520130101 ,  C22C38/02 ,  C22C38/04 ,  C23C2/12 ,  C23C2/29 ,  C23C2/28 ,  C23C2/40 ,  B21D53/88

摘要： The present invention provides an Al-Si coated press hardening component, a preparation method and use thereof, the component comprising a steel substrate and an Al-Si coating arranged on at least one surface of the steel substrate, wherein the Al-Si coating comprises a low-Al content ferrite layer with an Al content of less than 5wt% and a thickness of greater than 5µm, and the maximum bending angle of the Al-Si coated press hardening component is greater than 65°. The present invention significantly increases the thickness of the tough low-Al content ferrite layer in the Al-Si coating after hot stamping, reaching 5-100 µm, by improving the hot stamping process, so that the formation or propagation of cracks on the surface or the coating is effectively prevented, and the bendability of the pre-coated steel after hot stamping is improved. At the same time, the hot stamping process of the present invention can take into account or optimize the microstructure of the steel substrate to further improve the bendability and tensile property of the whole material.

公开(公告)号：EP3504351A1

公开(公告)日：2019-07-03

申请号：EP16913763.5

申请日：2016-08-24

申请人： The University of Hong Kong

发明人： HUANG, Mingxin ,  HE, Binbin

IPC分类号： C22C38/58 ,  B21B1/06

公开(公告)号：EP3735479A1

公开(公告)日：2020-11-11

申请号：EP18897903.3

申请日：2018-01-05

申请人： The University of Hong Kong

发明人： HUANG, Mingxin ,  HE, Binbin

IPC分类号： C22C38/04 ,  C22C38/02 ,  C22C38/14 ,  C21D8/02

公开(公告)号：EP4421191A1

公开(公告)日：2024-08-28

申请号：EP22882697.0

申请日：2022-10-11

申请人： The University of Hong Kong

发明人： HUANG, Mingxin ,  WANG, Zhou

IPC分类号： C21D9/46 ,  B21D22/02

CPC分类号： B21D22/02 ,  B21D37/16 ,  B21D53/88 ,  C21D9/00 ,  C21D9/46 ,  C21D11/00 ,  C22C21/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/22 ,  C22C38/24 ,  C22C38/34 ,  C22C38/38 ,  C23C2/12 ,  C23C2/28 ,  C23C2/40

摘要： The invention provides a hot stamping method for pre-coated steel plate, comprising performing a preliminary heat treatment to the pre-coated steel plate before the hot stamping, the preliminary heat treatment comprising: (1) a step of heating and temperature holding: heating the pre-coated steel plate to 850 - 920 °C and temperature holding for 7 to 15 minutes, or heating to 920 - 960 °C and temperature holding for 5 to 10 minutes; (2) a step of cooling: cooling the pre-coated steel plate to below 300 °C after the step of heating and temperature holding at a cooling rate not less than 5 °C/s; and (3) optionally repeating the above step of heating and temperature holding and the step of cooling one or more times. The preliminary heat treatment can increase the alloying degree of the pre-coating layer, reduce the carbide structures in the steel plate matrix, obtain martensite and/or bainite matrix structure, so as to reduce the damage to a stamping die caused by the pre-coating layer during the stamping and deforming under a high temperature, refine the grains, and improve the fracture performance of the finished hot stamped member.

公开(公告)号：EP4264660A1

公开(公告)日：2023-10-25

申请号：EP21905705.6

申请日：2021-12-14

申请人： The University of Hong Kong

发明人： HUANG, Mingxin ,  FENG, Shien Ping

IPC分类号： H01L21/603