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Title:
HIGH FREQUENCY RESISTANCE WELDED STEEL PIPE AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2024/002220
Kind Code:
A1
Abstract:
Provided in the present invention is a high frequency resistance welded steel pipe, comprising: C: 0.025-0.054%, Si: 0.10-0.30%, Mn: 1.21-1.45%, Ni: 0.05-0.20%, Cr: 0.11-0.25%, Mo: 0.01-0.15%, Nb: 0.030-0.055%, Ti: 0.005-0.020%, Al: 0.020-0.050%, and Ca: 0.001-0.004%. The high frequency resistance welded steel pipe has good DWTT crack arresting performance and weld seam impact toughness at low temperatures, and can be applied to the field of high-end submarine pipelines servicing at low temperatures.

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Inventors:
SUN LEILEI (CN)
QU XIANYONG (CN)
ZHU DEFENG (CN)
ZHANG CHUANGUO (CN)
ZHANG HAOZHEN (CN)
YANG XIAOZHEN (CN)
HUA JUNSHAN (CN)
Application Number:
PCT/CN2023/103716
Publication Date:
January 04, 2024
Filing Date:
June 29, 2023
Export Citation:
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Assignee:
BAOSHAN IRON & STEEL (CN)
International Classes:
C22C38/28; B23P17/00; C21D8/02; C22C38/02; C22C38/14; C22C38/50; C22C38/54
Domestic Patent References:
WO2021058003A12021-04-01
Foreign References:
CN110230007A2019-09-13
CN102642123A2012-08-22
CN103695786A2014-04-02
CN109957712A2019-07-02
CN103966505A2014-08-06
Attorney, Agent or Firm:
SHANGHAI PATENT & TRADEMARK LAW OFFICE, LLC (CN)
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