Physical nature of critical temperature cutting
In the given article the complex researches conducted by the author on three groups of materials on a basis iron, nickel and the titan are presented, as a result which are advanced: strength’ and plasticity’s properties at a stretching and compression of samples depending on test temperature; an internal friction of heteronymic samples and its options depending on test’ temperature; influence of speed and cutting giving on deterioration and firmness of cutters. The behavior of key options of deformation of a cut off layer (outgrowth height, shrinkage and hardness of a shaving, width of a stain of contact of a shaving, microhardness the shaving parties about the tool) in function from speed and temperature of cutting is studied. A number of the new critical temperatures which size does not depend on external and internal conditions of process of cutting is revealed, and advanced by significance of temperatures at which in the course of secondary plastic distortion a contact layer there are polymorphic transformations. On the basis of scientifically established fact of coincidence of one of critical temperatures of cutting with temperature of polymorphic transformations the physical optimality criterion, temperature of polymorphic transformation θnn, that has allowed time-work methods of definition of optimum speed of cutting (inventor’s certificates №679320, №673376, №766746), optimum termo-EMF (inventor’s certificate № 878419), having a high efficiency on time and under expenses.
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critical temperature; internal friction; microhardness the shaving parties about the tool; outgrowth height; physical optimality criterion; shrinkage and hardness of a shaving; structural phase transformations; temperature of polymorphic transformation; внутреннее трение; высота нароста; критическая температура; микротвёрдость прирезцовой стороны стружки; структурно-фазовые или иные превращения; температура полиморфного превращения; усадка и твёрдость стружки; физический критерий оптимальности References to this article (GOST) I.S. Pravednikov. Physical nature of critical temperature cutting // Electronic scientific journal "Oil and Gas Business". 2011. №3. P.297-309. URL: http://ogbus.ru/authors/Pravednikov/Pravednikov_8.pdf