MULTI-WIRE SUBMERGED ARC WELDING METHOD FOR Q370QE THICK PLATE

WIPO Patent Application WO/2023/029279

A1

Disclosed is a multi-wire submerged arc welding method for a Q370qE thick plate. A double-U groove having truncated edge slopes, and H10Mn2A welding wires are used. Moreover, elements such as C, Mn, P, and S are specially agreed in a welding material technical agreement, and the performance of high toughness at low temperature of weld metal is ensured by means of combination optimization of the contents of the elements. The present invention is low in process cost, simple to operate, and excellent in welding process performance. The formed weld metal has the characteristic of high toughness at low temperature, and the strength thereof matches that of base metal, so that a welded joint has the mechanical properties of high strength and excellent low-temperature toughness, and can meet the technical requirements for welded super-thick plates suitable for bridge steel.

JPS5340653	PANEL WELDING PROCESS
JPH106001	PRODUCTION OF OVERLAY WELDED ROLL EXCELLENT IN CORROSION RESISTANCE AND WEAR RESISTANCE
JP3824143	FLUX FOR SUBMERGED ARC WELDING AND METHOD FOR PRODUCING SUBMERGED ARC WELDED JOINT

LI SONG (CN)
LI WEI (CN)
WU JUNMING (CN)
LIU YINCONG (CN)
WANG XIAOBIN (CN)
TIAN HAO (CN)

PCT/CN2021/136680

March 09, 2023

December 09, 2021

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NANJING IRON & STEEL CO LTD (CN)

B23K9/18; B23K9/095; B23K9/235; B23K35/30

CN113732459A	2021-12-03
CN102744498A	2012-10-24
CN103894710A	2014-07-02
CN102049599A	2011-05-11
CN103341686A	2013-10-09
CN109014513A	2018-12-18
CN112372117A	2021-02-19
US3748429A	1973-07-24

NANJING LI&FENG INTELLECTUAL PROPERTY AGENCY (SPECIAL GENERAL PARTNERSHIP) (CN)

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