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Information × Registration Number 0214U000177, 0112U006483 , R & D reports Title Researching of the influence of nano-formation on microstructure welded seams of high-strength low-alloyed steels for working under extreme conditions popup.stage_title Head Fomichov Sergiy Konstantinovich, Registration Date 21-01-2014 Organization National Technscal University of Ukraine "Kiev Polytechnic Institute". popup.description2 Report for the second stage composed by 77 pages , in one part , contains 33 illustrations , 22 tables and a list of references from 11 sources . Object of study - the microstructure of weld metal of high- alloy steels . Purpose - recommendations for correcting the influence of the content and composition of oxide nanopowders on the formation of the microstructure of the welds and its mechanical properties . Research methods and apparatus - when doing research using methods of optical and electron microscopy , X-ray diffraction analyzes and computer programs for the analysis of microstructural components and distribution of non-metallic inclusions in size and composition . Results and innovation - it is shown that the formation of structures with higher rates of strength and toughness is more effective when implementing into welding pool of nano titanium than aluminum and zirconium , and a high strength with sufficient viscosity - nano alumina . The main feature of this structure is reduction of the brittle ferrite morphological forms , as well as a high degree of grinding and dispersion of structural components . The technological regulations , including recommendations for the production of welded joints of high strength low alloyed steels modified by metal oxides of nano additives are developed. Product Description popup.authors Головко В.В. Кузнецов В.Д. Лобода П.І. Смирнов І.В. Фомічов С.К. popup.nrat_date 2020-04-02 Close