RAIL CROPPING USING THE OXYGEN-GASOLINE (PETROGEN) CUTTING TORCH
Hardness checks of the cropped area revealed excess cementite and a hardened heat-affected zone. This method of cropping rail for oxyacetylene pressure butt welding is not recommended unless the cementite and heat-affected area is removed by other means. Because of the large quantity of metal removed (washed-out) during the electric-flash butt-welding process, cropping by an oxygen-gaoline torch may be acceptable, but if cementite becomes entrapped in the weld interface during the welding process, a weld failure may result. If cementite becomes entrapped in a weld produced by a thermite welding process, it will act as a stress raiser which promotes fatigue failure. In rail torch-cut for application of joint bars, the presence of cementite on the rail faces may promote head and web separations.
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Corporate Authors:
American Railway Engineering Association
59 East Van Buren Street
Chicago, IL United States 60605 - Publication Date: 1966-2
Media Info
- Features: Photos; Tables;
- Pagination: p. 483-489
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Serial:
- AREA BULLETIN
- Volume: 67
- Issue Number: 598
- Publisher: American Railway Engineering Association
Subject/Index Terms
- TRT Terms: Hardness; Maintenance of way; Railroad rails; Technology; Welded rail; Welding
- Geographic Terms: United States
- Old TRIS Terms: Cropping; Rail welding
- Subject Areas: Maintenance and Preservation; Railroads;
Filing Info
- Accession Number: 00040467
- Record Type: Publication
- Files: TRIS
- Created Date: Jan 22 1976 12:00AM