紀要論文

紀要論文

text

Transactions of JWRI. 2005, 34(1), p. 131-134

Fracture Toughness of Rolled H Section Steel Welds Jointed by Newly Developed Flash Welding System

英語

text

2005-07

For joining large sectional members, such as I section or H section steels, on site, a new flash welding system was developed. When H section steel (600×300(mm)) was joined by using the newly developed flash welding system, the joining time was 1/10 compared with that by conventional arc welding. There is also an advantage that when this system is used, members are employed directly from gas cutting, without groove preparations. A series of experiments have been carried out to investigate the basic mechanical characteristics of H section steel members joined by the flash welding system. In this paper, CTOD tests and Charpy impact tests were carried out on the specimens cut from the flanges of H section steel welds joined by the newly developed flash welding system to investigate fracture toughness of the joints. Although the critical CTOD of the welds was lower than that of the base metal, it recovered to that of the base metal after PWHT. Although Charpy absorbed energy at 0℃ was about 30J, it became over 100J after PWHT. The critical CTOD of the flash welded joints could be accurately estimated from the Charpy energy of flash welded joints through the equation that was proposed for the HAZ of the arc welding.

10.18910/9318

9318

Fracture Toughness of Rolled H Section Steel Welds Jointed by Newly Developed Flash Welding System

大阪大学接合科学研究所

英語

2005-07

Transactions of JWRI

34

1

131

134

https://hdl.handle.net/11094/9318

10.18910/9318

https://doi.org/10.18910/9318