The Paton Welding Journal, 2015, №06



2015 №06 (27)

DOI of Article 10.15407/tpwj2015.06.28

2015 №06 (29)

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The Paton Welding Journal, 2015, #5-6, 124-129 pages  

Effect of technological parameters of laser and laser-plasma alloying on properties of 38KhN3MFA steel layers

L.I. Markashova, V.D. Shelyagin, O.S. Kushnaryova And A.V. Bernatsky

E.O. Paton Electric Welding Institute, NASU. 11 Bozhenko Str., 03680, Kiev, Ukraine. E-mail: office@paton.kiev.ua
 
 
Abstract
The results of investigations of structural-phase conditions in surface layers of structural steel 38KhN3MFA and their changes under different modes of strengthening by laser and laser-plasma alloying are given. Experimental investigations were used as a basis for analytical evaluation of differential input of all structures being formed in strengthening and their parameters (chemical composition, grain and subgrain structures, dislocation density, volume fraction of phase precipitates etc.) in change of strength characteristics of alloyed layers, conditions of crack formation promoted by formation of local internal stress concentrators, i.e. zones of nucleation and propagation of cracks, as well as mechanisms for relaxation of such type of stresses. 12 Ref., 6 Figures.
 
 
Keywords: structural steel, working surface, laser and laser-plasma surface alloying, structure, substructure, phase precipitates, dislocation density, service properties of surfaces
 
 
Received:                31.03.15
Published:               28.07.15
 
 
References
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