Browse > Article
http://dx.doi.org/10.7782/JKSR.2012.15.3.266

A Experimental Study on Strength Safety of Rail Steel using Gas Pressure Welding  

Kim, Kyung-Seob (서울메트로 창동차량사업소)
Publication Information
Journal of the Korean Society for Railway / v.15, no.3, 2012 , pp. 266-271 More about this Journal
Abstract
This study was carried out for the purpose of improving driving safety and comfort of the railways quickly becoming popular. To conducted gas pressure welding to ensure the strength safety of continuous welded rail and rotating bending test tensile test was conducted. The element to determine the tensile strength of gas pressure welds at experiments be attributed to more upsetting length than pressure, according to increases of upsetting length, from brittle fracture to ductile fracture was observed. Through the biopsy of the fracture surface, according to the presence of brittle fracture could be evaluated to strength safety. In addition, mechanical strength of gas pressure welding depending on changes in upsetting length was different. Rotary bending test results were obtained to the infinite life according to exhibited higher fatigue limit of 373MPa at upsetting length 25mm.
Keywords
Strength safety; Gas pressure welding; Upsetting length; Brittle fracture;
Citations & Related Records
연도 인용수 순위
  • Reference
1 K. Kamiyama, M. Tatsumi (1996) 1st Rail gas pressure welding method technical announcement meeting, JR Railroad Technology Institute, pp. 14-20.
2 A. Murakami (1997) A Phenomenon of Shinkansen rail damage, Japanese railroad facility association, pp. 263-265.
3 Y.G. Park, S.K. Suh, J.Y. Choi (2008) Logicality Estimate for Domestic the Periodic Replacement Criteria of CWR based on Accumulated Passing Tonnage, Journal of the Korean Society for Railway, 11(3), pp. 326-333
4 T. Sato (1980) J. The Japan Institute of Metals, 44, pp. 594.   DOI
5 A. B. Kinzel (1944) solid phases welding, weld. J., 23(12), pp. 1124.
6 Ishi (1956) solid phases welding, weld. J., 20(2), pp. 89.
7 J. L. Zamblow and R. D. Williams (1946) pressure gas pressure welding of alloy steel tubing, weld. J., 25(10), pp. 585.
8 K. S. Kim (1999) A Study on the welding of Rail Steel by Gas Pressure Welding, Han Yang University industrial graduate engineering master thesis, pp. 39.