Search academic texts

Information × Registration Number 0203U000223, 0100U002579 , R & D reports Title The development of the theoretical and technological manufacturing principles highualitative and alloy treated steels popup.stage_title Head Harlachin Pete Stepanovich, Registration Date 28-01-2003 Organization Pryazovskyi State Technical University popup.description2 Researches object (designing): - theoretical and technological bases of technology of complex refining, microalloying and modifying constructional low-alloyed steel; - modifying technology of liquid steel; - modifying technology of liquid steel; - methods and types of cargo the modifiers in liquid steel; - diverse metal ingots types' different obliquity of verges, in that number and trumpet; Research aim: - to make better macro- and ingot microstructure; - weldability steels; - to decrease maintenance of expensive and scarce alloying elements in metal; - to be accorded high physico-mechanical rolling properties; - to raise cold-resistance of trumpet steel and her isotropy; - to bow laboratory researches out on beginnings process model of shrink defects on height of trumpet ingot for account of use of inlaying melted refrigerator; Research methods and apparatus: - research methods metallographic and electronic-microscopic macro- and microstructure began (the optical microscope MIM-8, REM-200); - statistic and dynamic test the metal for determination of durability descriptions, hardness, and shock viscidity (bursting engine UIM-8, balance copra); - experience on study of process of crystallization of bullion conducted in metallic and sandy - argillaceous forms; Theoretical and practical results: - is formulated a general elements-modifier determination regulations on solubility factor base and electronegativity in alloys on iron base; - is seen out atoms dominance estimation of diverse elements, adsorption-activity in relation to iron, on nature of subatomic interactions; - are worked up the compositions of complex Modifiers on base of chemically active elements: calcium, titan, niobium, vanadium, coniferous forest, zirconium, yttrium in combinations and correlation is, providing their electoral conduct as yttrium in combinations I and clan II; - is established complex action of worked up modifiers on growing shallow of structures primary and second, diminution of dimensions and amount of non-metallic inclusions, change of their form and distribution, rise of structure homogeneity; - shown, that application of complex modifiers allows to fine down grains borders began from short pellicle apportionment's (manganese sulfides, titan carbonitride and vanadium) and segregation's a sulfur, that brings about rise of mechanical characteristic by steels; - is worked up technology lead-in of diverse complex modifiers, and also containing the thinly-landed metals, on different stages of metallurgical redistribution cast iron and steels; - for the first time established, that refrigerators of small the masses (0,2-0,5 % from ingot the masses ) improve upon metal quality, and withass more 1 % are instrumental in beginnings of inlaying axial shrinkage emptiness', that facilitates a bottle conversion of trumpet ingot on metallurgical enterprises; Novelty - chemical composition of complex modifier, refrigerators application technology, which facilitates the bottle conversion of trumpet ingot; Efficiency of introduction - economy 3-4 of hryvna on 1 ton by steels; Sphere (area) of use - metallurgical industry; advantage of work on known analogues - analogue are absent. Product Description popup.authors popup.nrat_date 2020-04-02 Close