NL7402597A - Electroslag rectification of defects - in castings or interrupted electroslag welds - Google Patents

Electroslag rectification of defects - in castings or interrupted electroslag welds

Info

Publication number
NL7402597A
NL7402597A NL7402597A NL7402597A NL7402597A NL 7402597 A NL7402597 A NL 7402597A NL 7402597 A NL7402597 A NL 7402597A NL 7402597 A NL7402597 A NL 7402597A NL 7402597 A NL7402597 A NL 7402597A
Authority
NL
Netherlands
Prior art keywords
electroslag
workpiece
cavity
defects
slag
Prior art date
Application number
NL7402597A
Other languages
Dutch (nl)
Other versions
NL154681B (en
Original Assignee
Rotterdamsche Droogdok Mij
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 Rotterdamsche Droogdok Mij filed Critical Rotterdamsche Droogdok Mij
Priority to NL7402597A priority Critical patent/NL154681B/en
Priority to BE159476A priority patent/BE832759A/en
Publication of NL7402597A publication Critical patent/NL7402597A/en
Publication of NL154681B publication Critical patent/NL154681B/en

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
    • B23K9/00—Arc welding or cutting
    • 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
    • B23K25/00—Slag welding, i.e. using a heated layer or mass of powder, slag, or the like in contact with the material to be joined
    • B23K25/005—Welding for purposes other than joining, e.g. built-up welding

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Arc Welding In General (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

Electroslag welding starting and/or restarting free from defects, generally for use with thick walled workpieces, by (a) treating the workpiece at a starting position in such a way that a cavity is produced free from defects and with a rounded and more or less smooth surface, (b) filling this cavity with slag which is then heated to such a high temp. that the material of the workpiece on the inner surface of the cavity melts in the slag, (c) introducing a fusible electrode of the same material as the workpiece into the slag, and (d) filling the cavity with the material of the fusible electrode, while passing current through this, whereby a continuous metallic transition results between the added material and the workpiece. Eliminates the rejection of castings with shrinkage cavities or welds with defective zones arising from interruption of the electroslag welding and the subsequent re-starting.
NL7402597A 1974-02-26 1974-02-26 PROCEDURE FOR TREATING IMPERFECTIONS OF GENERAL THICK-WALLED WORKPIECES. NL154681B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NL7402597A NL154681B (en) 1974-02-26 1974-02-26 PROCEDURE FOR TREATING IMPERFECTIONS OF GENERAL THICK-WALLED WORKPIECES.
BE159476A BE832759A (en) 1974-02-26 1975-08-26 PROCEDURE FOR TREATING IMPERFECTIONS OF GENERALLY THICK-WALLED WORKPIECES

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7402597A NL154681B (en) 1974-02-26 1974-02-26 PROCEDURE FOR TREATING IMPERFECTIONS OF GENERAL THICK-WALLED WORKPIECES.

Publications (2)

Publication Number Publication Date
NL7402597A true NL7402597A (en) 1975-08-28
NL154681B NL154681B (en) 1977-10-17

Family

ID=19820845

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7402597A NL154681B (en) 1974-02-26 1974-02-26 PROCEDURE FOR TREATING IMPERFECTIONS OF GENERAL THICK-WALLED WORKPIECES.

Country Status (2)

Country Link
BE (1) BE832759A (en)
NL (1) NL154681B (en)

Also Published As

Publication number Publication date
BE832759A (en) 1975-12-16
NL154681B (en) 1977-10-17

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Legal Events

Date Code Title Description
V1 Lapsed because of non-payment of the annual fee
NL80 Abbreviated name of patent owner mentioned of already nullified patent

Owner name: ROTTERD DROOG