Title:
FABRICATION METHOD FOR STEEL THIN-WALLED TAILOR-WELDED PART AND HOT-STAMPED PART PREPARED USING TAILORED-WELDED PART
Document Type and Number:
WIPO Patent Application WO/2023/025242
Kind Code:
A1
Abstract:
A fabrication method for a steel thin-walled tailor-welded part and a hot-stamped part prepared by using the tailored welded part, the method comprising: using steel plates (10, 10, 20) to be welded which have an aluminum or aluminum alloy coating (12, 12', 22, 22') is used; by means of adjusting the composition of a shielding gas (50) and the composition of a welding wire (30) during a welding process, in combination with the control of the welding speed and wire-feeding speed, controlling the content of free aluminum in a weld seam to be 0.1 to 4.0 wt.%, which prevents the production of iron-aluminum intermetallic compounds in the weld seam during a tailor welding process while ensuring that an appropriate amount of ferrite which is distributed in a dispersed manner is produced in the weld seam. The weld seam structure of the obtained tailor-welded part is +1 to 15 vol.% martensite, +0 to 5 vol.% ferrite which is distributed in a dispersed manner, and the remainder is austenite. The weld seam structure of the hot-stamped part obtained via hot stamping is +0.1 to 10 vol.% martensite, and ferrite which is distributed in a dispersed manner.
Inventors:
PAN HUA (CN)
LIU CHENGJIE (CN)
WU TIANHAI (CN)
LEI MING (CN)
SUN ZHONGQU (CN)
JIANG HAOMIN (CN)
WANG SHUYANG (CN)
WU YUE (CN)
LIU CHENGJIE (CN)
WU TIANHAI (CN)
LEI MING (CN)
SUN ZHONGQU (CN)
JIANG HAOMIN (CN)
WANG SHUYANG (CN)
WU YUE (CN)
Application Number:
PCT/CN2022/114784
Publication Date:
March 02, 2023
Filing Date:
August 25, 2022
Export Citation:
Assignee:
BAOSHAN IRON & STEEL (CN)
International Classes:
B23K26/21; B23K9/173; B23K9/23; B23K26/348; B23K26/60
Foreign References:
| CN111230301A | 2020-06-05 | |||
| CN111215751A | 2020-06-02 | |||
| CN106029292A | 2016-10-12 | |||
| CN111390425A | 2020-07-10 | |||
| CN112548395A | 2021-03-26 | |||
| JP2016159359A | 2016-09-05 | |||
| CN101426612A | 2009-05-06 | |||
| CN102985216A | 2013-03-20 | |||
| CN108025400A | 2018-05-11 | |||
| CN201380027064A | 2013-05-28 | |||
| CN104023899A | 2014-09-03 | |||
| CN111230301A | 2020-06-05 |
Attorney, Agent or Firm:
SHANGHAI PATENT & TRADEMARK LAW OFFICE, LLC (CN)
Download PDF: