HETEROGENEOUS STRUCTURE PARAMETER EFFECT UPON RESISTANCE TO CONTACT SPALLING
Rubrics: MECHANICAL ENGINEERING AND TRANSPORT
Authors:
1.
Bryansk State Technical University
(Professor, Pro-rector for Promising Development)
employee
Bryansk, Bryansk, Russian Federation
employee
Bryansk, Bryansk, Russian Federation
Type:
Article
Pages:
from 54
to 58
Status:
Published
Received:
29.12.2015
Accepted:
29.12.2015
Published:
29.12.2015
Language:
Russian
Keywords:
uniformity of strengthening, warping, hardness, heterogeneously strengthened structure, durability, static pulse working
Abstract (English):
At present time to increase surface layer life in machinery there is formed a heterogeneously streng thened structure representing alternate hard tough areas. The method of static-pulse working (SPW) with surface plastic forming is a method promising enough for the heterogeneous structure formation in a surface layer. At SPW the plastic forming of material to be strengthened is carried out through an impulse load which is a consequence of rise at a blow in an impact system of a strain wave and controlled by the change of geometrical parameters in an impact system. The SPW allows creating a strengthened structure both uniformly, and heterogeneously. For a wider use of the heterogeneous strain strengthening of the SPW in industry there were developed the heterogeneity parameters describing the distribution of hard-tough areas in the surface layer; there were carried out researches of the resistance to a contact spalling of heterogeneously strengthened samples of steel 45, steel X, steel 35 XGSA; there was carried out the analysis of the distribution of hard-tough areas in the surface layer of strengthened samples. As a result of researches carried out for steel 45, steel 40X, steel 35XGSA there was defined a range of heterogeneity parameters conducive to the increase of their resistance to a contact spalling two … six times more.
At present time to increase surface layer life in machinery there is formed a heterogeneously streng thened structure representing alternate hard tough areas. The method of static-pulse working (SPW) with surface plastic forming is a method promising enough for the heterogeneous structure formation in a surface layer. At SPW the plastic forming of material to be strengthened is carried out through an impulse load which is a consequence of rise at a blow in an impact system of a strain wave and controlled by the change of geometrical parameters in an impact system. The SPW allows creating a strengthened structure both uniformly, and heterogeneously. For a wider use of the heterogeneous strain strengthening of the SPW in industry there were developed the heterogeneity parameters describing the distribution of hard-tough areas in the surface layer; there were carried out researches of the resistance to a contact spalling of heterogeneously strengthened samples of steel 45, steel X, steel 35 XGSA; there was carried out the analysis of the distribution of hard-tough areas in the surface layer of strengthened samples. As a result of researches carried out for steel 45, steel 40X, steel 35XGSA there was defined a range of heterogeneity parameters conducive to the increase of their resistance to a contact spalling two … six times more.
Keywords:
uniformity of strengthening, warping, hardness, heterogeneously strengthened structure, durability, static pulse working
uniformity of strengthening, warping, hardness, heterogeneously strengthened structure, durability, static pulse working
