1. O‘quv materiallar

Радиус инерции сечения — геометрическая характеристика сечения, связывающая геометрический момент инерции фигуры {\displaystyle J}  с её площадью {\displaystyle F}  следующимиформулами:м


GLOSSARI


Resistance welding - the formation of one-piece welded joint by heating the metal passing through electric shock and plastic deformation of the connection area under the influence of compressive force.
Pressure welding - welding, whereby in the contact region of the two metal surfaces is deformed, thereby forming a weld. It is carried out at the expense of interaction (association of the electron shells) of atoms of the two metals welded surfaces. Thus the quality of the sealing could depend on many factors:
Resistance spot welding also occurs title roller welding - welding process in which parts are joined seam, consisting of a number of individual welds (cast zones), partially overlapping one another and forming a sealed seam.
Hot cracks during welding - intercrystalline brittle fracture of the weld metal and heat affected zone, resulting in a solid-liquid state at the completion of crystallization, as well as in the solid state at high temperatures on the stage of development intergrain preferential deformation. They can occur at an unfavorable combination of several factors associated with a decrease in the deformation ability of the metal structure due to the presence of low-melting eutectics, defects of crystalline structure, separation of brittle phases, inclusion of hydrogen (hydrogen disease), and so on. D.
Cold welding - welding process pressure to the plastic deformation of the mating surfaces of blanks without additional heating external heat sources. This welding method is based on the plastic deformation at the point of connection with the compression and / or by shifting (slip). Welding takes place at normal or low temperatures as a result of setting instantaneously (no diffusion).