Abstract
Identified the interrelationships between the depth of the surface layer with modified physical-mechanical properties (defective or work-hardened or fill hard layer), the parameters of cutting process, and the properties of materials of tool and workpiece. Justified the necessity of research the processes of formation the properties of the machined surface from the standpoint of the thermo-physics of the cutting process
Highlights
The formation of subsurface deformation is an attribute of the wedge cutting process
Makarov [2] that defines the section II as the range of optimal temperatures are in good agreement with the concept of "transition cutting speeds" [4] in which there is a change of types of contact interaction
The higher degree of influence of tool wear, compared with the cutting speed, is explained by the fact that tool wear, as "explanatory" factor defines the total influence of cutting speed and temperature-deformation processes in the defomed chip
Summary
The results of experimental studies and conclusions of A. Curve (III) determines the influence of feed rate on the depth and degree of deformation of the surface layer in the range of high cutting speeds (Section III, Fig. 3), corresponding to the plastic contact of the tool and the chip. The results of investigations of the state of the surface layer in the processing of heat-resistant deformable alloys shown (Fig. 5) that the depth and the degree of deformation reaches the minimum values in the range of medium (Fig. 3, section II) cutting speeds, while the temperature dependence in the contact zone is monotonous. The analysis allows to make preliminary conclusions about the importance of the effect of thermal processes in the contact zone "tool-workpiece" on the properties of the surface layer of machined parts, i.e., depending on the depth and degree of deformation of the hardened layer from the thermophysical characteristics of structural and tool materials.
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