PT89270A - Circular seam prodn. by electro-gas welding - with liq. metal-protective atmos. interface maintained on plane through axis of rotation of steel tubular sections - Google Patents

Circular seam prodn. by electro-gas welding - with liq. metal-protective atmos. interface maintained on plane through axis of rotation of steel tubular sections

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Publication number
PT89270A
PT89270A PT8927088A PT8927088A PT89270A PT 89270 A PT89270 A PT 89270A PT 8927088 A PT8927088 A PT 8927088A PT 8927088 A PT8927088 A PT 8927088A PT 89270 A PT89270 A PT 89270A
Authority
PT
Portugal
Prior art keywords
rotation
axis
metal
electro
prodn
Prior art date
Application number
PT8927088A
Other languages
Portuguese (pt)
Other versions
PT89270B (en
Original Assignee
Sorefame Soc Reunidas De Fabri
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 Sorefame Soc Reunidas De Fabri filed Critical Sorefame Soc Reunidas De Fabri
Priority to PT8927088A priority Critical patent/PT89270B/en
Publication of PT89270A publication Critical patent/PT89270A/en
Publication of PT89270B publication Critical patent/PT89270B/en

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  • Arc Welding In General (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

The process ensures that the mid-level (1) of the sepg. surface between liquid metal and protective atmosphere is maintained during welding substantially coincident with the horizontal plane passing through the axis of the circular sections (2) being welded together. The equipment consists of a complete electro-gas welding unit, section positioner and rotator (11), shoes (5) and means for synchronising speed of rotation with welding rate. High welding rates are achieved as well as satisfactory mechanical properties, specifically resilience, both in the zone affected by heat and in the fused metal, even at sub-zero temps., with various steels, e.g. C-Mn steels with controlled rolling.
PT8927088A 1988-12-20 1988-12-20 PROCESS AND EQUIPMENT FOR PERFORMING CIRCULAR SEAMS BY WELDING ELECTROGUES PT89270B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PT8927088A PT89270B (en) 1988-12-20 1988-12-20 PROCESS AND EQUIPMENT FOR PERFORMING CIRCULAR SEAMS BY WELDING ELECTROGUES

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PT8927088A PT89270B (en) 1988-12-20 1988-12-20 PROCESS AND EQUIPMENT FOR PERFORMING CIRCULAR SEAMS BY WELDING ELECTROGUES

Publications (2)

Publication Number Publication Date
PT89270A true PT89270A (en) 1990-06-29
PT89270B PT89270B (en) 1995-05-31

Family

ID=20084376

Family Applications (1)

Application Number Title Priority Date Filing Date
PT8927088A PT89270B (en) 1988-12-20 1988-12-20 PROCESS AND EQUIPMENT FOR PERFORMING CIRCULAR SEAMS BY WELDING ELECTROGUES

Country Status (1)

Country Link
PT (1) PT89270B (en)

Also Published As

Publication number Publication date
PT89270B (en) 1995-05-31

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Legal Events

Date Code Title Description
FG3A Patent granted, date of granting

Effective date: 19941117

MM3A Annulment or lapse

Free format text: LAPSE DUE TO NON-PAYMENT OF FEES

Effective date: 19960531