STEEL FOR SUBMERGED-ARC WELDING WIRE, WIRE ROD, SUBMERGED-ARC WELDING WIRE AND PREPARATION METHOD THEREFOR

WIPO Patent Application WO/2024/082921

A1

A method for preparing a steel for a high-Ti pipeline submerged-arc welding wire, comprising converter smelting, LF refining, continuous casting, rolling and cooling; in LF refining, refining slag components by weight percentage are: 40-50% (CaO+CaF2), 30-40% Al2O3, ≤5% SiO2, and 10-20% MnO, and during the LF refining process, a pure calcium wire is fed before tapping. A steel for a submerged-arc welding wire and a preparation method therefor, a wire rod for a submerged-arc welding wire, a submerged-arc welding wire and a preparation method therefor. The steel for the submerged-arc welding wire and the preparation method for the submerged-arc welding wire overcome the defects of submerged-arc welding wire being high in cost and prone to nodulation; when the steel for the submerged-arc welding wire is prepared, it may continuously cast in more than 10 furnaces.

WANG NA (CN)
ZHANG YU (CN)
MA HAN (CN)

PCT/CN2023/120789

April 25, 2024

September 22, 2023

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ZHANGJIAGANG RONGSHENG SPECIAL STEEL CO LTD (CN)
INSTITUTE OF RES OF IRON AND STEEL JIANGSU PROVINCE/SHA STEEL CO LTD CN (CN)
JIANGSU SHAGANG GROUP CO LTD (CN)

B23K35/40; B23K9/18

CN115351458A	2022-11-18
CN110453150A	2019-11-15
CN102950392A	2013-03-06
CN103060526A	2013-04-24
CN104831014A	2015-08-12
CN110982982A	2020-04-10
CN111485052A	2020-08-04
CN113699457A	2021-11-26
GB202113700D0	2021-11-10
JP2006104531A	2006-04-20

SUNSHINE INTELLECTUAL PROPERTY INTERNATIONAL CO., LTD. (CN)

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