Title:
SHIPBUILDING 5NI STEEL SUBMERGED ARC WELDING METHOD
Document Type and Number:
WIPO Patent Application WO/2022/037175
Kind Code:
A1
Abstract:
The present invention relates to a shipbuilding 5Ni steel submerged arc welding method: (1) shipbuilding 5Ni steel of which the tensile strength is 630-670 MPa serves as a splicing base material; a matching welding material: the welding material tensile strength being 630-710 MPa, the welding wire diameter being φ2.4 mm or more, the grade being INCO-WELD Filler Metal C-276, and INCOFLUX 9 being the flux; (2) a K-shaped groove is employed as the submerged arc welding groove for the splicing material; (3) welding parameters: the welding current being 410±10 A, the welding voltage being 32±1 V, the welding speed being 27±2 cm/min, the welding wire energy being 30±3 KJ/cm, but joints of splicing base materials of a same plate thickness are welded continuously until the welding seam is filled, and a steel brush is employed to clean the weld bead after each instance of welding; a flux baking system being 350 °C × 1 h; and the interlayer temperature being controlled at ≤ 80 °C. Submerged arc welding achieves increased levels of butt joint tensile strength and impact energy absorption values of the butt joint weld bead, a welding line, and a heat affected zone; the welded joint is provided with excellent low-temperature impact toughness and cold bending performance.
Inventors:
LIU ZHAOXIA (CN)
LUO YUANDONG (CN)
XU XIAOHONG (CN)
BAI YUN (CN)
LIU JUN (CN)
MENG YU (CN)
ZHOU YONGHAO (CN)
WU JINMING (CN)
CHEN CHONG (CN)
LUO YUANDONG (CN)
XU XIAOHONG (CN)
BAI YUN (CN)
LIU JUN (CN)
MENG YU (CN)
ZHOU YONGHAO (CN)
WU JINMING (CN)
CHEN CHONG (CN)
Application Number:
PCT/CN2021/097059
Publication Date:
February 24, 2022
Filing Date:
May 30, 2021
Export Citation:
Assignee:
JIANGYIN XINGCHENG SPECIAL STEEL WORKS CO LTD (CN)
International Classes:
B23K9/18; B23K9/235; B23K9/32; B23K35/30
Foreign References:
| CN112192001A | 2021-01-08 | |||
| CN106334860A | 2017-01-18 | |||
| CN106457481A | 2017-02-22 | |||
| CN101658970A | 2010-03-03 | |||
| CN102873439A | 2013-01-16 | |||
| CN103433603A | 2013-12-11 | |||
| CN107309527A | 2017-11-03 | |||
| US5304346A | 1994-04-19 | |||
| CN10852661A | ||||
| GBT113451989A |
Other References:
See also references of EP 4180164A4
Attorney, Agent or Firm:
JIANGYIN QING ZHOU PATENT AGENCY (GENERAL PARTNERSHIP) (CN)
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