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Information × Registration Number 0216U003824, 0113U003489 , R & D reports Title Working out of materials, technologies and improvement of the equipment for restoration and hardening of connecting elements of boring pipes з the purpose of increase of term of their operation. popup.stage_title Head Zhudra Olexandr Petrovich, Registration Date 18-02-2016 Organization E.O. Paton Electric Welding Institute of the National Academy of Sciences of Ukraine popup.description2 Marked growth of depths of drilling of chinks and increase in volumes of drilling роторным predetermine in the way advancing deterioration of an external surface of locks at which it is not obviously possible to use to the full a lock resource, in particular, the threefold recutting put in its design замковой carvings. Restoration of operational characteristics of boring pipes with навернутыми on them locks demands the material inputs connected with transportation of pipes and their repair, and, besides, is interfaced to technical difficulties on removal of the worn out lock for наворота the new. Thus, the restoration problem геомнетрических connecting эдементов and increases of wear resistance of their external surface advances to the forefront the sizes and demands the immediate decision. The analysis resulted above works shows that practically any наплавочные the materials applied to hardening, make positive impact on working capacity of locks. It once again confirms a conclusion about necessity of a solution of a problem of hardening of locks наплавкой. It is necessary to develop corresponding techniques of research of working capacity of locks of boring pipes for a choice of optimum materials and processes of restoration and hardening of connecting elements, триботехнических properties наплавленного metal, to choose corresponding technology наплавки. The purpose of the given work is interaction research наплавочних alloys with a material обсадних pipes in промывочной environment of a liquid without an abrasive and with an abrasive and working out of materials for наплавки соединительних elements бурових pipes. It is established that at work of pair a friction of a material of the lock and a material обсадной pipes without an abrasive formation of zones схватывания and когезионный material breakage that testifies to essential influence of an adhesive component in formation of forces of a friction is observed. In the presence of an abrasive the dominant role in the course of wear process is played by a mechanical component. Hardening of an external surface of locks of boring pipes наплавкой wearproof materials leads to change of the mechanism of interaction of pair a friction and creates conditions for abrasive and occurrence crushing "шлифовочного" effect. Thus presence of cracks in наплавленном metal raises deterioration of a material обсадных pipes. Besides, in the investigated range of loadings hardening of an external surface of the lock cast and composite наплавочными alloys does not lead to increase in deterioration of a material обсадных pipes in comparison with ненаплавленной a surface. Wear resistance of composite alloys on the basis of tungsten carbides considerably exceeds wear resistance of a material of the lock and cast наплавочных alloys, and in a range real нагружения reduces deterioration of a material обсадных pipes. Thus prevailing role is played by high concentration on the area of a reinforcing phase in наплавленном metal. The matrix has optimum properties at the maintenance of structure of a firm solution of tungsten in gland not less than 55 % of volume, and quantity of structures эвтектики and secondary железовольфрамовых carbides accordingly no more than 35 and 10 % of volume. Thus the quantity of reinforcing particles should make not less than 40 % of volume of a composite alloy. Introduction in structure присадочного an aluminium material in quantity from 2,0... 3,2 мас. % eliminates porosity of a composite alloy, from 2,0... 2,2 to 4,5... 5,0 мас. % influences depth of an arrangement of reinforcing particles in наплавленном a layer. Introduction in structure присадочного a material ниобия, vanadium and the titan possessing the big affinity to carbon than tungsten, makes positive impact on formation of a matrix and its structural components. The optimal is the maintenance of the titan in quantity from 1,3... 1,5 to 2,6... 3,0 мас. %. The technique of tests for abrasive deterioration наплавочных alloys is developed, tests of composite alloys on the basis of carbides of tungsten received by various structures присадочного a material are conducted. The optimum structure of a material for plasma наплавки composite alloys is defined. Materials and technology of restoration and hardening of an external surface of locks of boring pipes are developed. The technical project on improvement of the equipment for наплавки is made. Trial tests under production conditions on наплавочном Open Company "Ресурс-1" site are conducted. As a result of tests it is revealed that locks with wearproof наплавкой are suitable for operation at the chisel enterprises and can be recommended in a batch production. Product Description popup.authors Білий О.І. Барановский О.Л. Ворончук О.П. Кривчіков С.Ю. Литвиненко А.І. Мельник Л.С. Петров В.В. Росляков О.І. Цепов С.В. popup.nrat_date 2020-04-02 Close