JPS57127587A - Welding method for preventing weld crack by electron beam - Google Patents

Welding method for preventing weld crack by electron beam

Info

Publication number
JPS57127587A
JPS57127587A JP1395581A JP1395581A JPS57127587A JP S57127587 A JPS57127587 A JP S57127587A JP 1395581 A JP1395581 A JP 1395581A JP 1395581 A JP1395581 A JP 1395581A JP S57127587 A JPS57127587 A JP S57127587A
Authority
JP
Japan
Prior art keywords
electron beam
down slope
slope
welding method
prevent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1395581A
Other languages
Japanese (ja)
Inventor
Takashi Miyazawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP1395581A priority Critical patent/JPS57127587A/en
Publication of JPS57127587A publication Critical patent/JPS57127587A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K15/00—Electron-beam welding or cutting
    • B23K15/0046—Welding
    • B23K15/0053—Seam welding

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Welding Or Cutting Using Electron Beams (AREA)

Abstract

PURPOSE:To prevent the longitudinal crack of a down slope part through lowering of cooling rate by controlling beam current gently at the start of the down slope and further agitating molten pool by beam deflection. CONSTITUTION:In the stage of shifting from a section 7 of steady penetration in electron beam to a down slope, beam current Ib is controlled to a gentle slope to prevent the generation of an imperfect solidification mode in a part 8. Further, just prior to the shift to the down slope, the molten pool is agitated by rotating the electron beam in a circular shape C or oscillating (d) the same in the welding direction, whereby the segregation of a metallic compound on account of an increased rate of cooling is suppressed and the longitudinal crack of a welded part W is prevented.
JP1395581A 1981-02-02 1981-02-02 Welding method for preventing weld crack by electron beam Pending JPS57127587A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1395581A JPS57127587A (en) 1981-02-02 1981-02-02 Welding method for preventing weld crack by electron beam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1395581A JPS57127587A (en) 1981-02-02 1981-02-02 Welding method for preventing weld crack by electron beam

Publications (1)

Publication Number Publication Date
JPS57127587A true JPS57127587A (en) 1982-08-07

Family

ID=11847626

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1395581A Pending JPS57127587A (en) 1981-02-02 1981-02-02 Welding method for preventing weld crack by electron beam

Country Status (1)

Country Link
JP (1) JPS57127587A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05261565A (en) * 1992-03-13 1993-10-12 Mitsubishi Electric Corp Working method using electron beam

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5326244A (en) * 1976-08-19 1978-03-10 Steigerwald Strahltech Energy beam welding

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5326244A (en) * 1976-08-19 1978-03-10 Steigerwald Strahltech Energy beam welding

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05261565A (en) * 1992-03-13 1993-10-12 Mitsubishi Electric Corp Working method using electron beam

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