JPS57190788A - Electron beam welding method - Google Patents

Electron beam welding method

Info

Publication number
JPS57190788A
JPS57190788A JP7574581A JP7574581A JPS57190788A JP S57190788 A JPS57190788 A JP S57190788A JP 7574581 A JP7574581 A JP 7574581A JP 7574581 A JP7574581 A JP 7574581A JP S57190788 A JPS57190788 A JP S57190788A
Authority
JP
Japan
Prior art keywords
molten metal
electron beam
changed
beam welding
welding
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
JP7574581A
Other languages
Japanese (ja)
Inventor
Toshio Kobashiri
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP7574581A priority Critical patent/JPS57190788A/en
Publication of JPS57190788A publication Critical patent/JPS57190788A/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

Landscapes

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

Abstract

PURPOSE:To promote a degassing effect and to prevent the generation of welding defects in the stage of electron beam welding of extra thick materials by changing the energy to be applied upon molten metal regularly thereby making the motion of the molten metal forcibly steady. CONSTITUTION:In the stage of welding steel materials of >=50mm. thickness by electron beam welding, the quantity of heat input is changed regularly to give forcible motion to the molten metal in the weld zone and to make its movement steady, thereby accelerating the regular solidification of the molten metal and preventing the generation of cavities and defects such as solidification cracking. To this end, the quantity of heat input is changed by changing electric current, and the current value is increased or decreased within a + or -0.5-50% range on the basis of the optimum value of a constant current. The periods thereof are changed at relatively low frequencies of 0.5-100Hz and the patterns of the current changes are formed into a sinusoidal or square wave form.
JP7574581A 1981-05-21 1981-05-21 Electron beam welding method Pending JPS57190788A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7574581A JPS57190788A (en) 1981-05-21 1981-05-21 Electron beam welding method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7574581A JPS57190788A (en) 1981-05-21 1981-05-21 Electron beam welding method

Publications (1)

Publication Number Publication Date
JPS57190788A true JPS57190788A (en) 1982-11-24

Family

ID=13585111

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7574581A Pending JPS57190788A (en) 1981-05-21 1981-05-21 Electron beam welding method

Country Status (1)

Country Link
JP (1) JPS57190788A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0255679A (en) * 1988-08-17 1990-02-26 Mitsubishi Heavy Ind Ltd Welding method by electron beam

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0255679A (en) * 1988-08-17 1990-02-26 Mitsubishi Heavy Ind Ltd Welding method by electron beam

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