METHOD OF WELDING STRUCTURAL STEEL AND WELDED STEEL STRUCTURE

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United States of America Patent

SERIAL NO

14370111

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A method of welding structural steel containing, by mass %, Cr: 1.5 to 3.5%, Mo: 0.5 to 1.5%, and V: 0.15 to 0.5%. It comprises preheating joint of the structural steel to be welded at temperatures of 150 to 250 degrees Celsius; multilayer welding the joint end portions; keeping the interpass temperature of the joint end portions during the multilayer welding at 150 to 350 degrees Celsius; then after welding completion, performing DHT by heat treating the weld zone before cooling down below 150 degrees Celsius under the conditions that the temperature is 250 to 340 degrees Celsius and that the treatment time is 5 to 10 hours.

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Patent Owner(s)

Patent OwnerAddress
HITACHI ZOSEN CORPORATIONHIGASHINADA-KU KOHBE-SHI 3-28 NISHIKUJO 5-CHOME KONOHANA-KU OSAKA-SHI 554

International Classification(s)

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  • 2013 Application Filing Year
  • B23K Class
  • 1742 Applications Filed
  • 1525 Patents Issued To-Date
  • 87.55 % Issued To-Date

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Abe, Masamitsu Osaka, JP 7 4
Nakatani, Mitsuyoshi Osaka, JP 3 2
Yamada, Junya Osaka, JP 76 169

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  • 2 Citation Count
  • B23K Class
  • 13.67 % this patent is cited more than
  • 10 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges1487741152783331101 - 1011 - 2021 - 3031 - 4041 - 5051 - 6061 - 7091 - 100100 +050100150200250300350400450500550600650700750800850

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