Title:
LASER WELDING AND HEAT TREATMENT METHOD FOR HIGH-STRENGTH STEEL
Document Type and Number:
WIPO Patent Application WO/2022/095341
Kind Code:
A1
Abstract:
A laser welding and heat treatment method for high-strength steel. The method comprises the following steps: selecting a welding paste having an austenite stabilizing element as a filler material; clamping and fixing two high-strength steel plates on a welding workbench; performing laser welding on a region to be welded while conveying the filler material to a weld pool; and placing the welded steel plates in a heating furnace at 850-1100°C for 2-30 min, and then cooling same to room temperature by any cooling means. After heat treatment, a fusion zone of a welded joint has a martensitic microstructure.
Inventors:
XU WEI (CN)
YANG SHANGLU (CN)
TAO WU (CN)
YANG SHANGLU (CN)
TAO WU (CN)
Application Number:
PCT/CN2021/088912
Publication Date:
May 12, 2022
Filing Date:
April 22, 2021
Export Citation:
Assignee:
SHANGHAI INST OPTICS & FINE MECH CAS (CN)
International Classes:
B23K26/21; B23K26/70; C21D1/18; C21D6/00; C21D9/50
Foreign References:
| CN104023899A | 2014-09-03 | |||
| CN111050980A | 2020-04-21 | |||
| CN108025400A | 2018-05-11 | |||
| CN104994989A | 2015-10-21 | |||
| JP2016159359A | 2016-09-05 |
Attorney, Agent or Firm:
SHANGHAI HENGHUI INTELLECTUAL PROPERTY AGENCY (CN)
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