Analysis of factors affecting fractures of rails welded by aluminothermic welding

• Autorzy: Sergeyev D. , Mikhailov S.
• Konferencja: Transcomp - XIV International Conference Computer Systems Aided Science, Industry and Transport
• Języki publikacji: EN

Abstrakty

EN

The thermic welding of rails is carried out in the following sequence: a mould is placed on the rails to be joined; a crucible is mounted on a special bracket; a portion of thermite is charged; the rail ends are pre-heated and thermite is ignited by a special ignition primer. On Latvian Railway, the use of the thermic welding is widespread using the Elektro-Thermit Company technology. Today it is a basic method for rail joints.The analysis of the metal structure in the thermic welded zone of rails showed that the weld metal had inclusions of iron oxides infused (FeO, Fe2O3, and Fe3O4) and small pores. Pores and infused oxides are concentrators of stresses and sources of cracks development. Pores and infused oxides reduce hardness of the weld joint under the action of tensile forces.

Słowa kluczowe

EN

welded joints; welding; structure; heat treatment

• Wydawca: Sieć Badawcza Łukasiewicz - Poznański Instytut Technologiczny
• Czasopismo: Logistyka
• Rocznik: 2010
• Tom: nr 6
• Opis fizyczny: Pełny tekst na CD, Bibliogr. 5 poz., rys., tab.

Twórcy

autor

Sergeyev D.

autor

Mikhailov S.

• Riga Technical University, Riga, Faculty of Transport and Mechanical Engineering, LATVIA; Riga LV-1004; Indrika street 8, Phone: [phone],

Bibliografia

• [1] Sliežu termīta metināšana. Tehniskie noteikumi., Rīga. 2002.g.
• [2] B.V.Malkin, А.A.Vorobjev :Termitnaja svarka, Моskow. Маshgiz. 1963 g.
• [3] European standard EN-14730 “Railway applications - Track - Aluminothermic welding of rails”, Brussels, 2006.
• [4] ГОСТ Р 51685-2000. “Рельсы железнодорожные. Общие технические условия”, - ВНИИЖТ, 2000.
• [5] European standard BS EN 13674-1:2003 “Railway applications. Track. Rail. Vignole railway rails 46 kg/m and above”, British, 2003